313
Y2002 All rights reserved. This book may not be reproduced or copied, in whole or in part, without the written permission of Toyota Motor Corporation. 2003 TOYOTA TUNDRA (EWD491U) 1 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM Section Code Page INTRODUCTION A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 HOW TO USE THIS MANUAL B . . . . . . . . . . . . . . . . . . 3 TROUBLESHOOTING C . . . . . . . . . . . . . . . . . . . . . . . . . 12 ABBREVIATIONS D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 GLOSSARY OF TERMS AND SYMBOLS E . . . . . . . . 18 RELAY LOCATIONS F . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 ELECTRICAL WIRING ROUTING G . . . . . . . . . . . . . . . 30 SYSTEM CIRCUITS H . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 GROUND POINT I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244 POWER SOURCE (Current Flow Chart) J . . . . . . . . . 250 CONNECTOR LIST K . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 PART NUMBER OF CONNECTORS L . . . . . . . . . . . . . 266 OVERALL ELECTRICAL WIRING DIAGRAM M . . . . . 270

2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

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Page 1: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2002All rights reserved. This book may not bereproduced or copied, in whole or in part, withoutthe written permission of Toyota MotorCorporation.

2003 TOYOTA TUNDRA (EWD491U)

1

2003 TOYOTA TUNDRAELECTRICAL WIRING DIAGRAM

Section Code Page

INTRODUCTION A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

HOW TO USE THIS MANUAL B. . . . . . . . . . . . . . . . . . 3

TROUBLESHOOTING C. . . . . . . . . . . . . . . . . . . . . . . . . 12

ABBREVIATIONS D. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

GLOSSARY OF TERMS AND SYMBOLS E. . . . . . . . 18

RELAY LOCATIONS F. . . . . . . . . . . . . . . . . . . . . . . . . . . 20

ELECTRICAL WIRING ROUTING G. . . . . . . . . . . . . . . 30

SYSTEM CIRCUITS H. . . . . . . . . . . . . . . . . . . . . . . . . . . 55

GROUND POINT I. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244

POWER SOURCE (Current Flow Chart) J. . . . . . . . . 250

CONNECTOR LIST K. . . . . . . . . . . . . . . . . . . . . . . . . . . . 256

PART NUMBER OF CONNECTORS L. . . . . . . . . . . . . 266

OVERALL ELECTRICAL WIRING DIAGRAM M. . . . . 270

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2003 TOYOTA TUNDRA (EWD491U)

3

HOW TO USE THIS MANUAL B

This manual provides information on the electrical circuits installed on vehicles bydividing them into a circuit for each system.

The actual wiring of each system circuit is shown from the point where the powersource is received from the battery as far as each ground point. (All circuitdiagrams are shown with the switches in the OFF position.)

When troubleshooting any problem, first understand the operation of the circuitwhere the problem was detected (see System Circuit section), the power sourcesupplying power to that circuit (see Power Source section), and the ground points(see Ground Point section). See the System Outline to understand the circuitoperation.

When the circuit operation is understood, begin troubleshooting of the problemcircuit to isolate the cause. Use Relay Location and Electrical Wiring Routingsections to find each part, junction block and wiring harness connectors, wiringharness and wiring harness connectors, splice points, and ground points of eachsystem circuit. Internal wiring for each junction block is also provided for betterunderstanding of connection within a junction block.Wiring related to each system is indicated in each system circuit by arrows(from__, to__). When overall connections are required, see the Overall ElectricalWiring Diagram at the end of this manual.

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@@@@@@@@@@@@@@@@@@@@@@@@@@@@

ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ

W–R

7. 5AGAUGE

1

2

3

4

487

2 1 11

13

4

1

2

3

4

1

2

B18

BL

FROM POWER SOURCE SYSTEM (SEE PAGE 66)

R–L

R–L

G

W–B

W–B

W–B

W–B

W–B

W–B

Y–G

R

L 4

H17

R 6

DELAYCIRCUIT

S 6

B18

3

4

R 7

BV11

G–W

G–R

G–R

G–R

G–R

G–W

G–W

(W/G

)

(S/D

)(S

/D)

C 7

(SHIELDED)

BV11

I 5

LL

STOP LIGHT

15

7

TO ABS ECU

BO

50

15ASTOP

IB

IB

REAR LIGHTSWARNING LIGHT[COMB. METER]

3C

3C

IE114

STOP LIGHT SW

ST

OP

LIG

HT

RH

[RE

AR

CO

MB

. LI

GH

T R

H]

ST

OP

LIG

HT

RH

[RE

AR

CO

MB

. LI

GH

T L

H]

HIGH MOUNTEDSTOP LIGHT

[A]

[B]

[I]

[D]

[F]

[H]

[E]

[J]

[M]

[N]

[K]

[L]

[G]

[C]

LIGHT FAILURE SENSOR

2003 TOYOTA TUNDRA (EWD491U)

4

B HOW TO USE THIS MANUAL

∗ The system shown here is an EXAMPLE ONLY. It is different to the actualcircuit shown in the SYSTEM CIRCUITS SECTION.

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2003 TOYOTA TUNDRA (EWD491U)

5

B

[A] : System Title

[B] : Indicates a Relay Block. No shading is used andonly the Relay Block No. is shown to distinguish itfrom the J/BExample: Indicates Relay Block No.1

[C] : ( ) is used to indicate different wiring andconnector, etc. when the vehicle model, enginetype, or specification is different.

[D] : Indicates related system.

[E] : Indicates the wiring harness and wiring harnessconnector. The wiring harness with male terminal isshown with arrows ( ).Outside numerals are pin numbers.

Female Male ( )

The first letter of the code for each wiring harnessand wiring harness connector(s) indicates thecomponent’s location, e.g, ”E” for the EngineCompartment, ”I” for the Instrument Panel andSurrounding area, and ”B” for the Body andSurrounding area.

When more than one code has the first and secondletters in common, followed by numbers (e.g, IH1,IH2), this indicates the same type of wiring harnessand wiring harness connector.

[F] : Represents a part (all parts are shown in sky blue).The code is the same as the code used in partsposition.

[G] : Junction Block (The number in the circle is the J/BNo. and the connector code is shown beside it).Junction Blocks are shaded to clearly separatethem from other parts.

3C indicatesthat it is insideJunction BlockNo.3

Example:

[H] : When 2 parts both use one connector in common,the parts connector name used in the wire routingsection is shown in square brackets [ ].

[I] : Indicates the wiring color.

Wire colors are indicated by an alphabetical code.

B = Black W = White BR = Brown

L = Blue V = Violet SB = Sky Blue

R = Red G = Green LG = Light Green

P = Pink Y = Yellow GR = Gray

O = Orange

The first letter indicates the basic wire color and thesecond letter indicates the color of the stripe.

Example: L – Y

L(Blue)

Y(Yellow)

[J] : Indicates a wiring Splice Point (Codes are ”E” for theEngine Room, ”I” for the Instrument Panel, and ”B”for the Body).

The Location of splice Point I 5 is indicated by theshaded section.

[K] : Indicates a shielded cable.

[L] : Indicates the pin number of the connector.The numbering system is different for female andmale connectors.

Example: Numbered in orderfrom upper left tolower right

Numbered in orderfrom upper right tolower left

Female Male

[M] : Indicates a ground point.

The first letter of the code for each ground point(s)indicates the component’s location, e.g, ”E” for theEngine Compartment, ”I” for the Instrument Paneland Surrounding area, and ”B” for the Body andSurrounding area.

[N] : Page No.

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[O]

[P]

[Q]

[R]

[S]

[T]

[U]

[V]

2003 TOYOTA TUNDRA (EWD491U)

6

B HOW TO USE THIS MANUAL

Current is applied at all times through the STOP fuse to TERMINAL 2 of the stop light SW.When the ignition SW is turned on, current flows from the GAUGE fuse to TERMINAL 8 of the light failure sensor, and also flowsthrough the rear lights warning light to TERMINAL 4 of the light failure sensor.

STOP LIGHT DISCONNECTION WARNINGWhen the ignition SW is turned on and the brake pedal is pressed (Stop light SW on), if the stop light circuit is open, the currentflowing from TERMINAL 7 of the light failure sensor to TERMINALS 1, 2 changes, so the light failure sensor detects thedisconnection and the warning circuit of the light failure sensor is activated.As a result, the current flows from TERMINAL 4 of the light failure sensor to TERMINAL 11 to GROUND and turns the rear lightswarning light on. By pressing the brake pedal, the current flowing to TERMINAL 8 of the light failure sensor keeps the warningcircuit on and holds the warning light on until the ignition SW is turned off.

S6 STOP LIGHT SW2–1 : Closed with the brake pedal depressed

L4 LIGHT FAILURE SENSOR1, 2, 7–GROUND : Approx. 12 volts with the stop light SW on

4, 8–GROUND : Approx. 12 volts with the ignition SW at ON position11–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

C7 34 L4 36 R7 37

H17 36 R6 37 S6 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

1 18 R/B No.1 (Instrument Panel Left)

@@@@@@@@@

ÀÀÀÀÀÀÀÀÀ

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

IB 20 Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)

3C 22 Instrument Panel Wire and J/B No.3 (Instrument Panel Left Side)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IE1 42 Floor Wire and Instrument Panel Wire (Left Kick Panel)

BV1 50 Luggage Room Wire and Floor Wire (Luggage Compartment Left)

: GROUND POINTS

Code See Page Ground Points Location

BL 50 Under the Left Quarter Pillar

BO 50 Back Panel Center

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I5 44 Cowl Wire B18 50 Luggage Room Wire

SYSTEM OUTLINE

SERVICE HINTS

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2003 TOYOTA TUNDRA (EWD491U)

7

B

[O] : Explains the system outline.

[P] : Indicates values or explains the function for reference during troubleshooting.

[Q] : Indicates the reference page showing the position on the vehicle of the parts in the system circuit.

Example : Part ”L4” (Light Failure Sensor) is on page 36 of the manual.∗ The letter in the code is from the first letter of the part, and the number indicates its order in parts

starting with that letter.Example : L 4 Á

ÁParts is 4th in orderLight Failure Sensor

[R] : Indicates the reference page showing the position on the vehicle of Relay Block Connectors in the system circuit.

Example : Connector ”1” is described on page 18 of this manual and is installed on the left side of the instrumentpanel.

[S] : Indicates the reference page showing the position on the vehicle of J/B and Wire Harness in the system circuit.

Example : Connector ”3C” connects the Instrument Panel Wire and J/B No.3. It is described on page 22 of thismanual, and is installed on the instrument panel left side.

[T] : Indicates the reference page describing the wiring harness and wiring harness connector (the female wiringharness is shown first, followed by the male wiring harness).

Example : Connector ”IE1” connects the floor wire (female) and Instrument panel wire (male). It is described onpage 42 of this manual, and is installed on the left side kick panel.

[U] : Indicates the reference page showing the position of the ground points on the vehicle.

Example : Ground point ”BO” is described on page 50 of this manual and is installed on the back panel center.

[V] : Indicates the reference page showing the position of the splice points on the vehicle.

Example : Splice point ”I5” is on the Cowl Wire Harness and is described on page 44 of this manual.

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2003 TOYOTA TUNDRA (EWD491U)

8

B HOW TO USE THIS MANUAL

The ground points circuit diagram shows the connections from all major parts to the respective ground points. Whentroubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identifythe problem ground quickly. The relationship between ground points ( EA , IB and IC shown below) can also bechecked this way.

I GROUND POINTFAN MAIN RELAY

FAN MAIN RELAY

A/C FAN RELAY NO.2

A/C FAN RELAY NO.3

RADIATOR FAN MOTOR

RETRACT CONTROLRELAY

RETRACT MOTOR RH

RETRACT MOTOR LH

FRONT TURN SIGNAL LIGHT RH

PARKING LIGHT RH

FRONT TURN SIGNALLIGHT LH

PARKING LIGHT LH

DOOR LOCK CONTROLSW RH

DOOR KEY LOCKSW RH

DOOR LOCK MOTORRH

BLOWER RESISTOR

A/C AMPLIFIER

RADIO AND PLAYER

HEATER RELAY

AUTO ANTENNAMOTOR

BLOWER SW

PARKING BRAKE SW

COMBINATION METER

HORN SW [COMB. SW]

TURN SIGNAL FLASHER

DOOR KEY LOCK SW LH

DOOR LOCK MOTOR LH

FUEL CONTROL SW

WOOFER AMPLIFIER

COMBINATION METER

COMBINATION METER

FUEL SENDER

CIGARETTE LIGHTER

O/D MAIN SW

CLOCK

5

5

5

5

4

4

4

4

4BA15

IB18

EA210

3E5

3E6

3G13

3F3

3D1

3B7

ID115

IC33

IA12

E 3

A

AA

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B W–B W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B W–B

W–B

BR

W–B

BR BR

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

BR

W–B

BRBR

BR

W–B

W–B

W–B

W–B

W–B

BR

W–B (4A–GZE)

W–B

A

A

A

I 6

I 6

I 2

I 2

I 2

B 5I 5

I 5

I 5

B 5

B 5

B 5

I 5

I 5

I 3I 3

E 3

E 3

E 3

E 2

E 4

E 5

E 4

E 5

E 6E 4

E 4

B 4

EA

I 4

B 4

B 4

I 4 I 8

IB IC

3C7

4

JUNCTIONCONNECTOR

J 1

4

DOOR LOCK CONTROLRELAY

ELECTRICAL IDLE−UPCUT RELAY (M/T)

FRONT SIDE MARKERLIGHT RH

FRONT SIDE MARKERLIGHT LH

BRAKE FLUID LEVELWARNING SW

UNLOCK WARNINGSW

WIPER AND WASHERSW [COMB. SW]

LIGHT CONTROL SW[COMB. SW]

HEATER CONTROLASSEMBLY

HEATER SERVOMOTOR AMPLIFIER

DIMMER SW[COMB. SW]

CRUISE CONTROLMIRROR SW

REAR WINDOWDEFOGGER SW

POWER WINDOWMASTER SW

POWER WINDOWCONTROL RELAY

DOOR LOCK CONTROL SW

REMOTE CONTROLMIRROR SW

∗ The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

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2003 TOYOTA TUNDRA (EWD491U)

9

B

The ”Current Flow Chart” section, describes which parts each power source (fuses, fusible links, and circuit breakers)transmits current to. In the Power Source circuit diagram, the conditions when battery power is supplied to each systemare explained. Since all System Circuit diagrams start from the power source, the power source system must be fullyunderstood.

Theft Deterrent and Door Lock Control

J POWER SOURCE (Current Flow Chart)

11

1

EA11EA23

7

EB16

E 6

E 7 I 2 I 2

I 2

E 7

E 7

E 7

2

1

1

2

2

2

2

2

B

B

WW

BB

BB

B

W–B

B

B

B

B–O

B–W

W–B

B–W

STARTER RELAY

INJECTION RELAY

15A HAZ–RADIO

7.5A AM2

50A MAIN

1.25B FL MAIN

BATTERY

W W W

W

W

W

R

W–L

WW

G–W

G

15A TAIL

20A DEFOG

15A RAD CIG

TAILRELAY

7.5A DOME

40A DOOR LOCK CB

21

12

48

23

34

G

W–R

P–L

B–Y

B–Y

W–R

AM

2IG

2

AC

C

IG1

AM

1W

W

W–R

W

W

W–B

2 1

1

1

1

1

2

2

2

2

3

4

3

4

1

2

1

2

2

1

11

1

IGNITION SWI 8

Battery 30A AM2 2

Starter S 220A RADIO NO.1

10A HORN

15A EFI

7.5A DOMEShort Pin

10A HAZARD

The chart below shows the route by which current flows from the battery to each electrical source(Fusible Link, Circuit Breaker, Fuse, etc.) and other parts.

Engine Room R/B (See Page 20)

ABSABS and Traction ControlCruise ControlElectronically Controlled Transmission and A/T IndicatorMultiplex Communication System

Cigarette Lighter and Clock

Key Reminder and Seat Belt Warning

STOP

Fuse Page194

214

112

System

DOME

20A

10A

Combination MeterHeadlightInterior Light

2

2

6100A ALT

EB1

POWER SOURCELight Auto Turn Off

187180166210

230

122

10A ECU–B

560A ABS

2

6Fusible Link Block

2

∗ The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

Page 9: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

BLACK

[D]

K CONNECTOR LIST

J4 K1 K2 L1

L2 L3 L4 M1 M2 M3

M4 N1 N2 O1 O2

DARK GRAY

GRAY

DARK GRAYBLACKGRAYGRAY

A B BA A B C C C

D DD D

AA

AA

AAA A 1

1 2 1 2

1 12 1

2

1 2 36 7 8 9 101112

4 5

71 23 45 6 8

4321

1 2 3 2 3 48 9 105 6

17

1 2 1 1

[A]

[C]

[B]J3

1 2 1 2

6 7 8

1 2A

A

A

AA AA B BA A B C C C

D DD D

I14 I15 I16 J1 J2DARK GRAY GRAY BLACK

2003 TOYOTA TUNDRA (EWD491U)

10

B HOW TO USE THIS MANUAL

[A] : Indicates connector to be connected to a part. (The numeral indicates the pin No.)

[B] : Junction ConnectorIndicates a connector which is connected to a short terminal.

Junction Connector

Short TerminalSame Color

Junction connector in this manual include a short terminal which isconnected to a number of wire harnesses. Always performinspection with the short terminal installed. (When installing thewire harnesses, the harnesses can be connected to any positionwithin the short terminal grouping. Accordingly, in other vehicles,the same position in the short terminal may be connected to a wireharness from a different part.)Wire harness sharing the same short terminal grouping have thesame color.

[C] : Parts CodeThe first letter of the code is taken from the first letter of part, and the numbers indicates its order in parts whichstart with the same letter.

[D] : Connector ColorConnectors not indicated are milky white in color.

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2003 TOYOTA TUNDRA (EWD491U)

11

B

[A] : Part Code

[B] : Part Name

[C] : Part NumberToyota Part Number are indicated.

Not all of the above part numbers of the connector are established for the supply. In case of ordering a connectoror terminal with wire, please confirm in advance if there is supply for it using “Parts Catalog News” (published byParts Engineering Administration Dept.).

A 5ÁÁÁÁ

90980–11194

L PART NUMBER OF CONNECTORSCode Part Name Part Number Code Part Name Part Number

A 1

A 2

A 4

A 6

A 7

A/C Ambient Temp. Sensor

A/C Condenser Fan Motor

A/C Triple Pressure SW (A/C Dual andSingle Pressure SW)

A/T Oil Temp. Sensor

ABS Actuator

ABS Actuator

90980–11070

90980–11237

90980–10943

90980–11413

90980–11151

D 4

D 5

D 6

D 7

D 8

D 9

D10

D11

Diode (Door Courtesy Light)

Diode (Key Off Operation)

Diode (Luggage Compartment Light)

Door Lock Control Relay

Door Courtesy Light LH

Door Courtesy Light RH

Door Courtesy SW LH

Door Courtesy SW RH

90980–11608

90980–10962

90980–11608

90980–10848

90980–11148

90980–11097

A 8 ABS Speed Sensor Front LH 90980–10941

A 9 ABS Speed Sensor Front RH

90980–11856A10 Airbag Sensor Front LH

A11 Airbag Sensor Front RH

D12 Door Courtesy SW Front LH

90980–11156D13 Door Courtesy SW Front RH

D14 Door Courtesy SW Rear LH

Door Courtesy SW Rear RHD15

[B] ÁÁÁÁ

[C]

A12 Auto Antenna Motor 90980–11194

A 3 A/C Condenser Fan Relay 90980–10940

[A]

90980–11009

90980–11002

D16

D17

Door Key Lock and Unlock SW LH

Door Key Lock and Unlock SW RH90980–11170

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To Ignition SWIG Terminal

Fuse

VoltmeterSW 1

Relay

SW 2 Solenoid

[A]

[B]

[C]

Ohmmeter

SW

Ohmmeter

Diode

Digital Type Analog Type

2003 TOYOTA TUNDRA (EWD491U)

12

C TROUBLESHOOTING

VOLTAGE CHECK

(a) Establish conditions in which voltage is present at the checkpoint.Example:

[A] – Ignition SW on[B] – Ignition SW and SW 1 on[C] – Ignition SW, SW 1 and Relay on (SW 2 off)

(b) Using a voltmeter, connect the negative lead to a good groundpoint or negative battery terminal, and the positive lead to theconnector or component terminal.This check can be done with a test light instead of a voltmeter.

CONTINUITY AND RESISTANCE CHECK

(a) Disconnect the battery terminal or wire so there is no voltagebetween the check points.

(b) Contact the two leads of an ohmmeter to each of the checkpoints.

If the circuit has diodes, reverse the two leads and checkagain.When contacting the negative lead to the diode positive sideand the positive lead to the negative side, there should becontinuity.When contacting the two leads in reverse, there should be nocontinuity.

(c) Use a volt/ohmmeter with high impedance (10 kΩ/Vminimum) for troubleshooting of the electrical circuit.

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To Ignition SWIG Terminal

Test Light

RelayLight

SW 2 Solenoid

Disconnect

Short [A]

DisconnectDisconnect

SW 1

Fuse Case

Short [B]

Short [C]

Pull Up

Press Down Press Down

Pull Up

2003 TOYOTA TUNDRA (EWD491U)

13

C

FINDING A SHORT CIRCUIT

(a) Remove the blown fuse and disconnect all loads of the fuse.(b) Connect a test light in place of the fuse.(c) Establish conditions in which the test light comes on.

Example:[A] – Ignition SW on[B] – Ignition SW and SW 1 on[C] – Ignition SW, SW 1 and Relay on (Connect the

Relay) and SW 2 off (or Disconnect SW 2)

(d) Disconnect and reconnect the connectors while watching thetest light.The short lies between the connector where the test lightstays lit and the connector where the light goes out.

(e) Find the exact location of the short by lightly shaking theproblem wire along the body.

CAUTION:(a) Do not open the cover or the case of the ECU unless

absolutely necessary. (If the IC terminals are touched,the IC may be destroyed by static electricity.)

(b) When replacing the internal mechanism (ECU part) ofthe digital meter, be careful that no part of your body orclothing comes in contact with the terminals of leadsfrom the IC, etc. of the replacement part (spare part).

DISCONNECTION OF MALE AND FEMALECONNECTORS

To pull apart the connectors, pull on the connector itself, notthe wire harness.

HINT : Check to see what kind of connector you aredisconnecting before pulling apart.

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10

3

0.21

1

(mm)

Reference:

ToolUpExample:(Case 1)

Terminal Retainer

Terminal Retainer

[Retainer at Full Lock Position]

[Retainer at Temporary Lock Position]

StopperTerminalRetainer

SecondaryLocking Device

Example:(Case 2)

2003 TOYOTA TUNDRA (EWD491U)

14

C TROUBLESHOOTING

HOW TO REPLACE TERMINAL(with terminal retainer or secondary locking device)

1. PREPARE THE SPECIAL TOOL

HINT : To remove the terminal from the connector, pleaseconstruct and use the special tool or like object shown onthe left.

2. DISCONNECT CONNECTOR

3. DISENGAGE THE SECONDARY LOCKING DEVICE OR

TERMINAL RETAINER.

(a) Locking device must be disengaged before the terminallocking clip can be released and the terminal removed fromthe connector.

(b) Use a special tool or the terminal pick to unlock the secondarylocking device or terminal retainer.

NOTICE:Do not remove the terminal retainer from connector body.

[A] For Non–Waterproof Type Connector

HINT : The needle insertion position varies according to the

connector’s shape (number of terminals etc.), so

check the position before inserting it.

”Case 1”

Raise the terminal retainer up to the temporary lock

position.

”Case 2”

Open the secondary locking device.

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ToolTab

Tab

TerminalRetainer

Access Hole( Mark)

Tool

Tool

[Female]

Example:

[Male]

(Case 1)

[Male] [Female]

Retainerat Full Lock Position

Retainerat Temporary Lock Position

Terminal Retainer

[Male] Press Down [Female]Press Down

ToolTool

Example:(Case 2)

2003 TOYOTA TUNDRA (EWD491U)

15

C

[B] For Waterproof Type Connector

HINT : Terminal retainer color is differentaccording to connector body.

Example:Terminal Retainer : Connector BodyBlack or White : GrayBlack or White : Dark GrayGray or White : Black

”Case 1”Type where terminal retainer is pulledup to the temporary lock position (PullType).

Insert the special tool into the terminalretainer access hole (Mark) and pullthe terminal retainer up to thetemporary lock position.

HINT : The needle insertion position variesaccording to the connector’s shape(Number of terminals etc.), so checkthe position before inserting it.

”Case 2”Type which cannot be pulled as far asPower Lock insert the tool straight intothe access hole of terminal retainer asshown.

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Retainer atFull Lock Position

[Male] [Female]

Retainer atTemporary Lock Position

Locking Lug

Tool

2003 TOYOTA TUNDRA (EWD491U)

16

C TROUBLESHOOTING

Push the terminal retainer down to the temporary lock position.

(c) Release the locking lug from terminal and pull the terminal outfrom rear.

4. INSTALL TERMINAL TO CONNECTOR

(a) Insert the terminal.HINT:1. Make sure the terminal is positioned correctly.2. Insert the terminal until the locking lug locks firmly.3. Insert the terminal with terminal retainer in the temporary lock

position.

(b) Push the secondary locking device or terminal retainer in tothe full lock position.

5. CONNECT CONNECTOR

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∗ The titles given inside the components are the names of the terminals (terminal codes) and are not treated as beingabbreviations.

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17

ABBREVIATIONS D

ABBREVIATIONS

The following abbreviations are used in this manual.

2WD = Two Wheel Drive Vehicles

4WD = Four Wheel Drive Vehicles

A/C = Air Conditioning

A/T = Automatic Transmission

ABS = Anti–Lock Brake System

ACIS = Acoustic Control Induction System

ADD = Automatic Disconnecting Differential

COMB. = Combination

ECU = Electronic Control Unit

ESA = Electronic Spark Advance

ETCS–i = Electronic Throttle Control System–intelligent

EVAP = Evaporative Emission

J/B = Junction Block

LH = Left–Hand

M/T = Manual Transmission

O/D = Overdrive

R/B = Relay Block

RH = Right–Hand

SFI = Sequential Multiport Fuel Injection

SRS = Supplemental Restraint System

SW = Switch

TEMP. = Temperature

TVIP = TOYOTA Vehicle Intrusion Protection

VSV = Vacuum Switching Valve

w/ = With

w/o = Without

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18

E GLOSSARY OF TERMS AND SYMBOLS

BATTERYStores chemical energy andconverts it into electrical energy.Provides DC current for the auto’svarious electrical circuits.

GROUNDThe point at which wiring attaches tothe Body, thereby providing a returnpath for an electrical circuit; without aground, current cannot flow.

CAPACITOR (Condenser)A small holding unit for temporarystorage of electrical voltage.

HEADLIGHTSCurrent flow causes a headlightfilament to heat up and emit light. Aheadlight may have either a single(1) filament or a double (2) filament

1. SINGLE FILAMENT

CIGARETTE LIGHTERAn electric resistance heatingelement.

2. DOUBLE FILAMENT

CIRCUIT BREAKERBasically a reusable fuse, a circuitbreaker will heat and open if toomuch current flows through it.Some units automatically reset whencool, others must be manually reset.

HORNAn electric device which sounds aloud audible signal.

DIODEA semiconductor which allowscurrent flow in only one direction.

IGNITION COILConverts low–voltage DC currentinto high–voltage ignition current forfiring the spark plugs.

DIODE, ZENERA diode which allows current flow in onedirection but blocks reverse flow only upto a specific voltage. Above that potential,it passes the excess voltage. This acts asa simple voltage regulator.

LIGHTCurrent flow through a filamentcauses the filament to heat up andemit light.

PHOTODIODEThe photodiode is a semiconductorwhich controls the current flowaccording to the amount of light.

LED (LIGHT EMITTING DIODE)Upon current flow, these diodes emitlight without producing the heat of acomparable light.

DISTRIBUTOR, IIAChannels high–voltage current fromthe ignition coil to the individualspark plugs.

METER, ANALOGCurrent flow activates a magneticcoil which causes a needle to move,thereby providing a relative displayagainst a background calibration.

FUSEA thin metal strip which burns throughwhen too much current flows through it,thereby stopping current flow andprotecting a circuit from damage.

FUSIBLE LINK

METER, DIGITALCurrent flow activates one or manyLED’s, LCD’s, or fluorescentdisplays, which provide a relative ordigital display.

FUEL

FUSIBLE LINKA heavy–gauge wire placed in highamperage circuits which burns through onoverloads, thereby protecting the circuit.The numbers indicate the crosssectionsurface area of the wires.

(for Medium Current Fuse)

(for High Current Fuse or Fusible Link)

MOTORA power unit which convertselectrical energy into mechanicalenergy, especially rotary motion.

M

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E

RELAYBasically, an electrically operatedswitch which may be normallyclosed (1) or open (2).Current flow through a small coilcreates a magnetic field which eitheropens or closes an attached switch.

1. NORMALLY CLOSED

2. NORMALLY OPEN

SWITCH, MANUALOpens and closesi it th b

SPEAKERAn electromechanical device whichcreates sound waves from currentflow.

RELAY, DOUBLE THROWA relay which passes currentthrough one set of contacts or theother.

circuits, therebystopping (1) orallowing (2) currentflow.

1. NORMALLY OPEN

2. NORMALLY CLOSED

RESISTORAn electrical component with a fixedresistance, placed in a circuit toreduce voltage to a specific value.

SWITCH, DOUBLE THROWA switch which continuously passescurrent through one set of contactsor the other.

RESISTOR, TAPPEDA resistor which supplies two ormore different non adjustableresistance values.

SWITCH, IGNITIONA key operated switch with severalpositions which allows variouscircuits, particularly the primaryignition circuit, to becomeoperational.

RESISTOR, VARIABLE or RHEOSTATA controllable resistor with a variablerate of resistance.Also called a potentiometer orrheostat.

SENSOR (Thermistor)A resistor which varies its resistancewith temperature.

SWITCH, WIPER PARKAutomatically returns wipers to thestop position when the wiper switchis turned off.

(Reed Switch Type)

SENSOR, SPEEDUses magnetic impulses to openand close a switch to create a signalfor activation of other components.

TRANSISTORA solidstate device typically used asan electronic relay; stops or passescurrent depending on the voltageapplied at ”base”.

SHORT PINUsed to provide an unbrokenconnection within a junction block.

WIRESWires are always drawn asstraight lines on wiringdiagrams.Crossed wires (1) without ablack dot at the junction are

t j i d

(1) NOT CONNECTED

SOLENOIDAn electromagnetic coil which formsa magnetic field when current flows,to move a plunger, etc.

jnot joined;crossed wires (2) with ablack dot or octagonal ( )mark at the junction arespliced (joined)connections.

(2) SPLICED

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F RELAY LOCATIONS

[Engine Compartment]

[Instrument Panel]

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21

F

2 : Engine Room R/B Engine Compartment Left (See Page 20)

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22

F RELAY LOCATIONS

: Driver Side J/B and

Integration RelayLower Finish Panel (See Page 20)

[w/o Daytime Running Light]

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F

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24

F RELAY LOCATIONS

[Driver Side J/B and Integration Relay Inner Circuit](w/o Daytime Running Light)

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MEMO

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26

F RELAY LOCATIONS

: Driver Side J/B and

Integration RelayLower Finish Panel (See Page 20)

[w/ Daytime Running Light]

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F

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28

F RELAY LOCATIONS

[Driver Side J/B and Integration Relay Inner Circuit](w/ Daytime Running Light)

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MEMO

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40

G ELECTRICAL WIRING ROUTING

: Location of Connector Joining Wire Harness and Wire Harness: Location of Ground Points

[2UZ–FE]

: Location of Splice Points

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G

Connector Joining Wire Harness and Wire Harness

147

36

258

2

5

8

3

6

1

4

7

1 23 4

2 14 3

1 2 3

654

3 2 1456

1 2 3 123 1 2 3

654

3 2 1456

EA1 BLACK EB1 BLACK

EC1 DARK GRAY EC2 GRAY ED1 GRAY

Code Joining Wire Harness and Wire Harness (Connector Location)

EA1 Cowl Wire and Engine Room Main Wire (Right Fender)

EB1 Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B)

EC1Engine No 2 Wire and Engine Wire (Near the Starter)

EC2Engine No.2 Wire and Engine Wire (Near the Starter)

ED1 Engine No.2 Wire and Differential Wire (Near the Transmission)

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G ELECTRICAL WIRING ROUTING

: Location of Connector Joining Wire Harness and Wire Harness: Location of Ground Points

[5VZ–FE]

: Location of Splice Points

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G

Connector Joining Wire Harness and Wire Harness

147

36

258

2

5

8

3

6

1

4

7

1 23 4

2 14 3

1 2 3

654

3 2 14563

1 2

3

12 1 2 2 1

EA1 BLACK EB1 BLACK

EE1 DARK GRAY EF1 GRAY EG1 GRAY

Code Joining Wire Harness and Wire Harness (Connector Location)

EA1 Cowl Wire and Engine Room Main Wire (Right Fender)

EB1 Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B)

EE1 Sensor Wire and Engine Wire (Over the Cylinder Head)

EF1 Engine Wire and Sensor Wire (Over the Cylinder Head)

EG1 Engine Wire and Differential Wire (Front Differential Upper Side)

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G ELECTRICAL WIRING ROUTING

: Location of Connector Joining Wire Harness and Wire Harness

: Location of Ground Points

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G

Connector Joining Wire Harness and Wire Harness

1 2

2 1

12 3

4

56 7 8 9 10 11

12

1314 15 16 17 18 19 20

2122 23 24 25 26

43 2

1

1211 10 9 8 7 6

5

2120 19 18 17 16 15 14

1326 25 24 23 22

1 2 3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18

9 8 7 6 5 4 3 2 1

18 17 16 15 14 13 12 11 10

1 2 3 4 4 3 2 1

1 23 4 5 6 78 9 10 11 12

12

34567

89101112

1 2 3 4 56 7 8 9 10

5 4 3 2 110 9 8 7 6

1 2 2 1

IA1 YELLOW IA4

IA5 IB2

IB3 IB4 IC1GRAY

Code Joining Wire Harness and Wire Harness (Connector Location)

IA1

IA4 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IA5

g ( )

IB2

IB3 Front Door LH Wire and Cowl Wire (Left Kick Panel)

IB4

( )

IC1 Cowl Wire and Roof Wire (Left Side of Instrument Panel)

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G ELECTRICAL WIRING ROUTING

: Location of Connector Joining Wire Harness and Wire Harness

: Location of Splice Points

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G

Connector Joining Wire Harness and Wire Harness

Code Joining Wire Harness and Wire Harness (Connector Location)

ID1Cigarette Lighter Wire and Cowl Wire (Instrument Panel Brace LH)

ID2Cigarette Lighter Wire and Cowl Wire (Instrument Panel Brace LH)

IE1

IE2 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

IE3

g ( g )

IF1

IF3 Front Door RH Wire and Cowl Wire (Right Kick Panel)

IF4

( g )

II1 Cowl Wire and Cowl Wire (Instrument Panel Reinforcement RH)

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G ELECTRICAL WIRING ROUTING

: Location of Connector Joining Wire Harness and Wire Harness: Location of Ground Points

[Access Cab]

: Location of Splice Points

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G

Connector Joining Wire Harness and Wire Harness

1

2

1

2

1 23 4 5 6 78 9 10 11 12

12

34567

89101112

1 2

3 4 5 6123456

1

2

1

2

1 23 4

2 14 3

1 2 3

4 5 6

3 2 1

6 5 4

1 2 3

4 5 6

3 2 1

6 5 41 2 3 4 5 5 4 3 2 1 1 2 3 4 4 3 2 1

23 41 12

4 3

21

3 4

2 1

34 2 31 23 1

BA1 BLACKBB1 BB2

BC1 BD1 BE2

BLACKBF2 BLACK BG2 BH1

BI1 BK1 GRAY BK2 GRAY(w/o Power Seat)

Code Joining Wire Harness and Wire Harness (Connector Location)

BA1 Front Door LH Wire and Speaker Tweeter Wire LH (Inside of Front Door LH)

BB1Frame Wire and Cowl Wire (Under the Driver’s Seat)

BB2Frame Wire and Cowl Wire (Under the Driver’s Seat)

BC1 Front Door RH Wire and Speaker Tweeter Wire RH (Inside of Front Door RH)

BD1 Frame Wire and Cowl Wire (Under the Front Passenger’s Seat)

BE2 Floor No.2 Wire and Cowl Wire (Center of Left Rocker Panel)

BF2 Floor No.1 Wire and Cowl Wire (Center of Right Rocker Panel)

BG2 Floor No.2 Wire and Rear Door No.1 Wire LH (Under the Left Quarter Panel)

BH1 Floor No.1 Wire and Rear Door No.1 Wire RH (Under the Right Quarter Panel)

BI1 Cowl Wire and Seat No.1 Wire (Under the Driver’s Seat)

BK1Frame Wire and Frame No 3 Wire (Near the License Plate Light)

BK2Frame Wire and Frame No.3 Wire (Near the License Plate Light)

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G ELECTRICAL WIRING ROUTING

: Location of Connector Joining Wire Harness and Wire Harness: Location of Ground Points

[Standard Cab]

: Location of Splice Points

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G

Connector Joining Wire Harness and Wire Harness

1

2

1

21 23 4 5 6 78 9 10 11 12

12

34567

89101112

1 2

3 4 5 6123456

1

2

1

2

23 41 12

4 3

21

3 4

2 1

34

2 31 23 1

1 23 4

2 14 3

BA1 BLACKBB1 BB2

BC1 BD1 BI1 GRAYBK1

GRAY

BK2BLACK

(w/o Power Seat)

Code Joining Wire Harness and Wire Harness (Connector Location)

BA1 Front Door LH Wire and Speaker Tweeter Wire LH (Inside of Front Door LH)

BB1Frame Wire and Cowl Wire (Under the Driver’s Seat)

BB2Frame Wire and Cowl Wire (Under the Driver’s Seat)

BC1 Front Door RH Wire and Speaker Tweeter Wire RH (Inside of Front Door RH)

BD1 Frame Wire and Cowl Wire (Under the Front Passenger’s Seat)

BI1 Cowl Wire and Seat No.1 Wire (Under the Driver’s Seat)

BK1Frame Wire and Frame No 3 Wire (Near the License Plate Light)

BK2Frame Wire and Frame No.3 Wire (Near the License Plate Light)

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G ELECTRICAL WIRING ROUTING

: Location of Connector Joining Wire Harness and Wire Harness

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G

Connector Joining Wire Harness and Wire Harness

23 41 12

4 31 2 2 1

BI1 BJ1(w/ Power Seat)

Code Joining Wire Harness and Wire Harness (Connector Location)

BI1 Cowl Wire and Seat No.1 Wire (Under the Driver’s Seat)

BJ1 Seat No.1 Wire and Seat No.2 Wire (Under the Driver’s Seat)

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MEMO

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G ELECTRICAL WIRING ROUTING

Position of Parts in Engine Compartment[2UZ–FE]

A 1 A/C Dual Pressure SWA 3 A/C Magnetic Clutch and Lock SensorA 4 A/T Oil Temp. SensorA 5 ABS Actuator with ECUA 6 ABS Speed Sensor Front LHA 7 ABS Speed Sensor Front RHA 9 ADD ActuatorA 11 Airbag Sensor Front LHA12 Airbag Sensor Front RH

B 2 Brake Fluid Level Warning SW

C 1 Camshaft Position SensorC 2 Crankshaft Position Sensor

D 2 Daytime Running Light ResistorD 3 Detection SW (Transfer 4WD Position)D 4 Detection SW (Transfer L4 Position)

E 1 Electronically Controlled Transmission SolenoidE 2 Engine Coolant Temp. Sensor

F 1 Front Fog Light LHF 2 Front Fog Light RHF 3 Front Turn Signal Light and Parking Light LHF 4 Front Turn Signal Light and Parking Light RHF 5 Fuel Pump Resistor

G 1 GeneratorG 2 Generator

H 1 Headlight LHH 2 Headlight RHH 3 Heated Oxygen Sensor (Bank 1 Sensor 1)H 4 Heated Oxygen Sensor (Bank 1 Sensor 2)H 5 Heated Oxygen Sensor (Bank 2 Sensor 1)H 6 Heated Oxygen Sensor (Bank 2 Sensor 2)H 7 Horn LHH 8 Horn RH

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G

Position of Parts in Engine Compartment[2UZ–FE]

I 3 Igniter and Ignition Coil No.1I 4 Igniter and Ignition Coil No.2I 5 Igniter and Ignition Coil No.3I 6 Igniter and Ignition Coil No.4I 7 Igniter and Ignition Coil No.5I 8 Igniter and Ignition Coil No.6I 9 Igniter and Ignition Coil No.7I 10 Igniter and Ignition Coil No.8I 14 Injector No.1I 15 Injector No.2I 16 Injector No.3I 17 Injector No.4I 18 Injector No.5I 19 Injector No.6I 20 Injector No.7I 21 Injector No.8

J 1 Junction ConnectorJ 2 Junction ConnectorJ 18 Junction Connector

K 1 Knock Sensor 1K 2 Knock Sensor 2

M 1 Mass Air Flow Meter

N 1 Noise Filter

O 1 O/D Direct Clutch Speed SensorO 6 Oil Pressure Sender

P 1 Park/Neutral Position SW

S 1 StarterS 2 Starter

T 2 Throttle Position SensorT 3 Transfer Shift ActuatorT 10 TVIP Buzzer

V 2 Vehicle Speed Sensor (Combination Meter)V 3 Vehicle Speed Sensor

(Electronically Controlled Transmission)V 4 VSV (EVAP)

W 2 Washer Motor and Washer Level SensorW 3 Water Temp. SenderW 4 Wiper Motor

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G ELECTRICAL WIRING ROUTING

Position of Parts in Engine Compartment[5VZ–FE]

A 1 A/C Dual Pressure SWA 2 A/C Magnetic ClutchA 4 A/T Oil Temp. SensorA 5 ABS Actuator with ECUA 6 ABS Speed Sensor Front LHA 7 ABS Speed Sensor Front RHA 8 Accel Position SensorA 9 ADD ActuatorA10 Air Fuel Ratio Sensor (Bank 1 Sensor 1)A 11 Airbag Sensor Front LHA12 Airbag Sensor Front RH

B 1 Back–Up Light SWB 2 Brake Fluid Level Warning SW

C 1 Camshaft Position SensorC 2 Crankshaft Position Sensor

D 2 Daytime Running Light ResistorD 3 Detection SW (Transfer 4WD Position)D 4 Detection SW (Transfer L4 Position)D 5 Detection SW (Transfer Neutral Position)

E 1 Electronically Controlled Transmission SolenoidE 2 Engine Coolant Temp. Sensor

F 1 Front Fog Light LHF 2 Front Fog Light RHF 3 Front Turn Signal Light and Parking Light LHF 4 Front Turn Signal Light and Parking Light RH

G 1 GeneratorG 2 Generator

H 1 Headlight LHH 2 Headlight RHH 7 Horn LHH 8 Horn RH

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G

Position of Parts in Engine Compartment[5VZ–FE]

I 2 IgniterI 11 Ignition Coil No.1I 12 Ignition Coil No.2I 13 Ignition Coil No.3I 14 Injector No.1I 15 Injector No.2I 16 Injector No.3I 17 Injector No.4I 18 Injector No.5I 19 Injector No.6

J 1 Junction ConnectorJ 2 Junction ConnectorJ 18 Junction Connector

K 1 Knock Sensor 1K 2 Knock Sensor 2

M 1 Mass Air Flow Meter

N 1 Noise Filter

O 2 Oil Pressure SWO 6 Oil Pressure Sender

P 1 Park/Neutral Position SWP 2 Power Steering Oil Pressure SW

S 1 StarterS 2 Starter

T 1 Throttle Control MotorT 2 Throttle Position SensorT 10 TVIP Buzzer

V 2 Vehicle Speed Sensor (Combination Meter)V 3 Vehicle Speed Sensor

(Electronically Controlled Transmission)V 4 VSV (EVAP)

W 2 Washer Motor and Washer Level SensorW 3 Water Temp. SenderW 4 Wiper Motor

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Position of Parts in Instrument Panel

A13 A/C ThermistorA15 Air Inlet Control Servo MotorA16 Airbag Squib (Front Passenger Airbag Assembly)A17 Airbag Squib (Steering Wheel Pad)A18 Ashtray IlluminationA20 Accelerator Pedal Position SensorA22 ACC Cut Relay

B 3 Back–UP Light RelayB 4 Blower MotorB 5 Blower ResistorB 6 Blower SW and Defroster Mode SW

C 4 Center Airbag Sensor AssemblyC 5 Center Airbag Sensor AssemblyC 6 Center Airbag Sensor AssemblyC 7 Cigarette LighterC 8 Cigarette Lighter IlluminationC 9 Clutch Start Cancel SWC10 Clutch Start SWC11 Combination MeterC12 Combination Meter

C13 Combination MeterC14 Combination MeterC15 Combination SWC16 Combination SWC17 Combination SWC18 Cruise Control Clutch SW

D 6 Data Link Connector 3D 8 Diode (A/T)D 9 Diode (Door Courtesy)D10 Diode (Idle–Up)D11 Diode (Power Window System)D27 Diode (Step Light)D28 Diode (Door Lock)D29 Diode (TVIP)D30 Diode (Unlock Warning)

E 3 Engine Control ModuleE 4 Engine Control ModuleE 5 Engine Control ModuleE 6 Engine Control ModuleE 7 Engine Control Module

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G

Position of Parts in Instrument Panel

F 7 4WD Control ECU

G 3 Glove Box Light

I 22 Ignition Key Cylinder LightI 23 Ignition SWI 24 Integration Control and PanelI 25 Integration Control and Panel

J 3 Junction ConnectorJ 4 Junction ConnectorJ 5 Junction ConnectorJ 7 Junction ConnectorJ 8 Junction ConnectorJ 9 Junction ConnectorJ 10 Junction ConnectorJ 11 Junction ConnectorJ 12 Junction ConnectorJ 13 Junction ConnectorJ 19 Junction ConnectorJ 20 Junction ConnectorJ 21 Junction ConnectorJ 22 Junction ConnectorJ 23 Junction ConnectorJ 24 Junction Connector

M 4 Mirror Heater SW

O 4 O/D Main SWO 5 Option Connector

P 3 Passenger Airbag Manual On–Off SWP 4 Passenger Airbag Manual On–Off SWP 5 Parking Brake SWP 6 Power OutletP 7 Power OutletP21 Power Window Control SW (Back Window)

R 1 Radio and PlayerR 2 Radio and PlayerR 3 RheostatR11 Radio and PlayerS 3 Step LightS 4 Stop Light SWS 8 Short PinS 9 Short Connector (TVIP)S10 Security Indicator and

Grass Brakeage Sensor Microphone

T 4 Transmission Control RelayT 5 Turn Signal FlasherT 9 Trailer ConverterT 11 TVIP ECUT 12 TVIP ECUT 13 TVIP ECU

U 1 Unlock Warning SW

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Position of Parts in Body[Access Cab]

A19 ABS Speed Sensor Rear

B 7 Buckle SW LH

D14 Door Courtesy Light LHD15 Door Courtesy Light RHD16 Door Courtesy SW Front LHD17 Door Courtesy SW Front RHD18 Door Courtesy SW Rear LH LowerD19 Door Courtesy SW Rear LH UpperD20 Door Courtesy SW Rear RH LowerD21 Door Courtesy SW Rear RH UpperD22 Door Key Lock and Unlock SW LHD23 Door Key Lock and Unlock SW RHD24 Door Lock Control SW RHD25 Door Lock Motor and Door Unlock Detection SW LHD26 Door Lock Motor and Door Unlock Detection SW RH

F 8 Front Door Speaker LHF 9 Front Door Speaker RHF 10 Fuel Pump and Sender

H 9 Heated Oxygen Sensor (Bank 1 Sensor 2)H10 High Mounted Stop Light and Cargo Light

I 26 Interior Light

J 14 Junction ConnectorJ 15 Junction Connector

L 1 License Plate Light LHL 2 License Plate Light RH

P 8 Personal LightP 9 Power Window Control SW RHP10 Power Window Master SWP 11 Power Window Motor Front LHP12 Power Window Motor Front RHP13 Pretensioner LHP14 Pretensioner RHP22 Power Window Motor (Back Window)

R 4 Rear Combination Light LHR 5 Rear Combination Light RHR 6 Rear Door Speaker LHR 7 Rear Door Speaker RHR 8 Remote Control Mirror LHR 9 Remote Control Mirror RHR10 Remote Control Mirror SW

S 5 Seat Belt Warning Occupant Detection Sensor

T 6 Trailer SocketT 7 Tweeter LHT 8 Tweeter RH

V 1 Vapor Pressure SensorV 6 Vanity Light LHV 7 Vanity Light RHV 9 VSV (Canister Closed Valve)

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Position of Parts in Body[Standard Cab]

A19 ABS Speed Sensor Rear

B 7 Buckle SW LH

D14 Door Courtesy Light LHD15 Door Courtesy Light RHD16 Door Courtesy SW Front LHD17 Door Courtesy SW Front RHD22 Door Key Lock and Unlock SW LHD23 Door Key Lock and Unlock SW RHD24 Door Lock Control SW RHD25 Door Lock Motor and Door Unlock Detection SW LHD26 Door Lock Motor and Door Unlock Detection SW RH

F 8 Front Door Speaker LHF 9 Front Door Speaker RHF 10 Fuel Pump and Sender

H 9 Heated Oxygen Sensor (Bank 1 Sensor 2)H10 High Mounted Stop Light and Cargo Light

I 26 Interior Light

J 14 Junction ConnectorJ 15 Junction Connector

L 1 License Plate Light LHL 2 License Plate Light RH

P 8 Personal LightP 9 Power Window Control SW RHP10 Power Window Master SWP 11 Power Window Motor Front LHP12 Power Window Motor Front RHP13 Pretensioner LHP14 Pretensioner RH

R 4 Rear Combination Light LHR 5 Rear Combination Light RHR 8 Remote Control Mirror LHR 9 Remote Control Mirror RHR10 Remote Control Mirror SW

S 5 Seat Belt Warning Occupant Detection Sensor

T 6 Trailer SocketT 7 Tweeter LHT 8 Tweeter RH

V 1 Vapor Pressure SensorV 9 VSV (Canister Closed Valve)

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Position of Parts in Seat

B 7 Buckle SW LH

J 16 Junction ConnectorJ 17 Junction Connector

L 3 Lumber Support Control SW (Driver’s Seat)

P15 Power Seat Motor (Driver’s Seat Front Vertical Control)P16 Power Seat Control SW (Driver’s Seat)P17 Power Seat Motor (Driver’s Seat Rear Vertical Control)P18 Power Seat Motor (Driver’s Seat Reclining Control)P19 Power Seat Motor (Driver’s Seat Slide Control)P20 Power Seat Motor

(Driver’s Seat Lumber Support Control)

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MEMO

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SYSTEM CIRCUITS H

2003 TOYOTA TUNDRAELECTRICAL WIRING DIAGRAM

SYSTEM CIRCUITSPage

ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156AIR CONDITIONING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240BACK–UP LIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108CARGO LIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74CIGARETTE LIGHTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214CLOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216COMBINATION METER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234CRUISE CONTROL (2UZ–FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160CRUISE CONTROL (5VZ–FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164DOOR LOCK CONTROL (w/ DAYTIME RUNNING LIGHT) . . . . . . . . . . . . . . . . . . . . . . . . . . 184DOOR LOCK CONTROL (w/o DAYTIME RUNNING LIGHT) . . . . . . . . . . . . . . . . . . . . . . . . 190ELECTRONICALLY CONTROLLED TRANSMISSION AND A/T INDICATOR (2UZ–FE) . 144ELECTRONICALLY CONTROLLED TRANSMISSION AND A/T INDICATOR (5VZ–FE) . 150ENGINE CONTROL (2UZ–FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76ENGINE CONTROL (5VZ–FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88FOG LIGHT (w/ DAYTIME RUNNING LIGHT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104FOG LIGHT (w/o DAYTIME RUNNING LIGHT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106HEADLIGHT (w/ DAYTIME RUNNING LIGHT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98HEADLIGHT (w/o DAYTIME RUNNING LIGHT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102HORN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218IGNITION (2UZ–FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68IGNITION (5VZ–FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72ILLUMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112INTEGRATION CONTROL AND PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138INTERIOR LIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116KEY REMINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210LIGHT AUTO TURN OFF (w/ DAYTIME RUNNING LIGHT) . . . . . . . . . . . . . . . . . . . . . . . . . . 124LIGHT AUTO TURN OFF (w/o DAYTIME RUNNING LIGHT) . . . . . . . . . . . . . . . . . . . . . . . . 128MIRROR HEATER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226POWER OUTLET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214POWER SEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230POWER SOURCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56POWER WINDOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204RADIO AND PLAYER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232REMOTE CONTROL MIRROR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228SEAT BELT WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210SRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169STARTING (2UZ–FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64STARTING (5VZ–FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60STOP LIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122TAILLIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110TRAILER TOWING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132TURN SIGNAL AND HAZARD WARNING LIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120TVIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196WIPER AND WASHER (w/ INT TIME SW MECHANISM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220WIPER AND WASHER (w/o INT TIME SW MECHANISM) . . . . . . . . . . . . . . . . . . . . . . . . . . 224WIRELESS DOOR LOCK CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1964WD (2UZ–FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1744WD (5VZ–FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

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POWER SOURCE

5

1

3

2

1 2

21

21

21

21

21

21

1 2

1 2

1 2

1 2

140A ALT(*1)100A ALT(*2)

30A TOWING

20A HAZ

40A ABS2

15A EFI NO. 1

50A J/B

30A AM2

40A AM1

H–LP RELAY

20A FOG

50A HTR

15A MIR HTR

2

2

2

B2

2

2

POWER OUTLET RELAY

2

HTR RELAY

5

1

3

2

2

5

1

3

2

4

2 2

3

1

5

2

2 2

22

2

B

L–R

W

W–R

W–G

W–L

R–B

W–G(*3)

G(*3)R–B

W–LB–R

W–G

W–R

R

W

BA

TTE

RY

DIMMER RELAY

R–B

B–L

B

JUNCTIONCONNECTOR

J 1

(*3)

EFI RELAY

( *4)

(* 4)

3

2

5

4

1 2

10A ETCS(*5)15A ETCS(*6)

12

2 1

2 1

30A TOW TAIL

30A SUB BATT

30A TOW BRK

( *1)

( *2)B

2

R–B

( *3)

1

21 2

7. 5A ALT–S

12SHORT PIN

2B

5A ECU–B

21

10A DOME

21

20A RADIO

21

30A ABS3

12

30A ST3

12

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(*4)

31

1 2

31

1 2

1 2

10A EFI NO. 2

10A HEAD RH

2

2

15A ACC

5A ECU IG

2

7

3

4

6

8

AM2

AM1

ACC

IG1

5A TURN

IG2

ST2

1 2

1I

4

1K

2

1I2

1I1

2

2

15A PWR OUTLET 1

1 2

1 2

2

* 3 : W/ DAYTIME RUNNING LIGHT

B

L–R

W

W–R

W–G

W–L

R–B

W–G(*3)

G(*3)

W–G

B–Y

B–R

G–B

L–R

10A A/C

IGNITION SWI23

10A GAUGE

20A 4WD

20A WIP

5A IGN

10A HEAD LH

30A POWER

7. 5A OBD

5A CARGO LP

15A STOP

15A TAIL

10A HORN

10A HEAD RL

10A HEAD LL

* 4 : W/O DAYTIME RUNNING LIGHT

15A PWR OUTLET 2

1 3

3

2

5

1

2 2B–W

G–B

ST RELAY

2

5A STA

W

( *6)

( *6)

(*6)

1I

3

JUN

CTI

ON

CO

NN

EC

TOR

J 2

(* 6)

B–W

(*6)

C

C

B–W

(*5)

(*5)

B–W

(*5)

B–W

IA49

(*6)

L–R

(*5)

1

3

2

4IA4

8

* 5 : 2UZ–FE* 6 : 5VZ–FE

L–O(*5)

L–O(*5)

L–R

( *5)

L–R

( *6)

ACC CUT RELAYA22

* 1 : TOWING PACKAGE* 2 : EXCEPT TOWING PACKAGE

W–RG–Y

(*5) (*5)

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POWER SOURCE

HEATER RELAY5–3 : Closed with ignition SW on and heater blower SW on

H–LP RELAY5–3 : Closed with light control SW at HEAD position or dimmer SW at FLASH position

Closed with engine running and parking brake lever released (w/ daytime running light)

I23 IGNITION SW2–3 : Closed with ignition key at ACC or ON position2–4 : Closed with ignition key at ON or ST position7–6 : Closed with ignition key at ON or ST position

DIMMER RELAY (w/ DAYTIME RUNNING LIGHT)3–5 : Closed with HEAD relay on and dimmer SW at HIGH or FLASH position

: PARTS LOCATION

Code See Page Code See Page Code See Page

A22 34J1

31 (2UZ–FE)J2

31 (2UZ–FE)

I23 35J1

33 (5VZ–FE)J2

33 (5VZ–FE)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1I22 (*2)

1I26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1K22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1K26 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA4 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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MEMO

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2003 TOYOTA TUNDRA (EWD491U)

60

STARTING (5VZ–FE)

2

2

2

W–R

23

15

M

A1 B1

2 2

2 2

EB13

9

6

N

P

B–Y

W–R

B–Y

B–W

WW

B–W

G–R

B–W

P

W–B

P

P

( A/T

)

( M/T

)

B–W

STRELAY

S 1

STARTER

BA , S 2

B

BATTERY

100A

ALT

40A

AM

1

(M/T)

W–B

( A/T

)

B

8

30A

AM

2

PA

RK

/NE

UTR

AL

PO

SIT

ION

SW

P 1

1

2

C10

CLU

TCH

STA

RT

SW

A A

J 8JUNCTIONCONNECTOR

2

7

4

AM2

AM1

ACC

IG1

IG2

ST2

1

11

2

22

A

W–B

( A/T

)

P

( M/T

)

P

G–B

IGNITION SWI23

(A/T

)

W–B

B–W

(A/T)

P

G–B

IA424

W

C

CC

JUN

CT

ION

CO

NN

EC

TO

R

J 2

I 1

IE219

IE212

C8C3

G–R ( *1) P ( *1)

TVIP ECU

T13 CST SRLY

(*2)

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1I21I3

10AGAUGE

5ASTA

1F71F6

B–Y

P

B–Y

B

( M/T

)

(M/T)

1 7

3 5

P

(M/T)

IE

W–B

W–B

B–Y

CLUTCH STARTCANSEL SW

C 9

–S E

+S IG

I 1

B–W

(A/T)

P

B

W–B

W–B

STA

( M/T

)

NSW

A7

B3

ENGINE CONTROLMODULE

BE 3 , E 4A

I 1

W–B

( M/T

)

W–B

BA

AA

W–B

JUNCTIONCONNECTOR

BJ23 , J24A

* 1 : W/ WIRELESS DOOR LOCK CONTROL* 2 : W/O WIRELESS DOOR LOCK CONTROL

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62

STARTING (5VZ–FE)

S1 (A), S2 (B) STARTERPoints closed with Park/Neutral position SW at P or N position and ignition SW at ST position (A/T)Points closed with clutch start SW or clutch start cancel SW on and ignition SW at ST position (M/T)

I23 IGNITION SW2–4 : Closed with ignition SW at ON or ST position7–8 : Closed with ignition SW at ST position

P1 PARK/NEUTRAL POSITION SW (A/T)6–9 : Closed with A/T shift lever in P or N position

ST RELAY5–3 : Closed with Park/Neutral position SW at P or N position and ignition SW at ST position (A/T)5–3 : Closed with clutch start SW or clutch start cancel SW on and ignition SW at ST position (M/T)

C9 CLUTCH START CANCEL SW (M/T)1–3 : Closed with ignition SW on and cancel SW on

C10 CLUTCH START SW (M/T)1–2 : Closed with clutch pedal fully depressed

: PARTS LOCATION

Code See Page Code See Page Code See Page

C9 34 J2 33 (5VZ–FE) S1 A 33 (5VZ–FE)

C10 34 J8 35 S2 B 33 (5VZ–FE)

E3 A 34 J23 A 35 T13 C 35

E4 B 34 J24 B 35

I23 35 P1 33 (5VZ–FE)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1F22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1I22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1I26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EB1 42 (5VZ–FE) Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B)

IA4 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IE2 46 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

: GROUND POINTS

Code See Page Ground Points Location

IE 44 Left Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I1 46 Cowl Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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63

MEMO

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2003 TOYOTA TUNDRA (EWD491U)

64

STARTING (2UZ–FE)

2

30AAM2

30AST3

1

2

2 2

7

8

AM2 IG2

ST2

1I3

5ASTA

1F6

2

5 1

3 2

2

2 2

BATTERY

STRELAY C

C

JUNCTIONCONNECTOR

J 2

EA

J18JUNCTIONCONNECTOR

A

A

P

N

6

9

A1

M

B1

EB13 IA424

IE112

PARK/NEUTRALPOSITION SW

P 1

A A A

JUNCTIONCONNECTOR

J20

I 3

STARTER

BS 1 , S 2A

G–Y W–B

B–W

B

W–B

W–B

P

P

G–R

G–R

B–WB

B–W

W–B

PP

G–R

W–B

P

W–B

W–B

W–B

B

W–R

P

B–L

( *1)

( *2)

B–L

( *4)

( *3)

(* 4) (*3)

(*3)

IGNITION SWI23

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65

C12

D9 E16 E17

C8

C3

ENGINE CONTROL MODULE

DE 5 , E 6C

TVIP ECU

T13 C

P

G–R

P

W–B

W–B

B

W–B

W–B P

P

G–R

STAR NSW STA

STSW

(*3)

(*3) (*3)

(*3)

SRLY

ST

E, E 7

B

IE115

* 2 : EXCEPT TOWING PACKAGE* 1 : TOWING PACKAGE

* 4 : W/O WIRELESS DOOR LOCK CONTROL* 3 : W/ WIRELESS DOOR LOCK CONTROL

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66

STARTING (2UZ–FE)

S1 (A), S2 (B) STARTERPoints closed with Park/Neutral position SW at P or N position and ignition SW at ST position

I23 IGNITION SW7–8 : Closed with ignition SW at ST position

P1 PARK/NEUTRAL POSITION SW6–9 : Closed with A/T shift lever in P or N position

ST RELAY5–3 : Closed with Park/Neutral position SW at P or N position and ignition SW at ST position

: PARTS LOCATION

Code See Page Code See Page Code See Page

E5 C 34 J2 31 (2UZ–FE) S1 A 31 (2UZ–FE)

E6 D 34 J18 31 (2UZ–FE) S2 B 31 (2UZ–FE)

E7 E 34 J20 35 T13 C 35

I23 35 P1 31 (2UZ–FE)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1F22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1I22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1I26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EB1 40 (2UZ–FE) Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B)

IA4 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IE1 46 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

: GROUND POINTS

Code See Page Ground Points Location

EA 40 (2UZ–FE) Front Left Fender

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I3 46 Engine Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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67

MEMO

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2003 TOYOTA TUNDRA (EWD491U)

68

IGNITION (2UZ–FE)

B( *

2)

2

30AAM2

2

W–R

7 6AM2 IG2

ST2

B–R

1I4

1J7

B–R

IE121

B–RE 7

B–R

G–R

1 3

1

IGN

ITE

R A

ND

IGN

ITIO

N C

OIL

NO

. 1

I 3

4 2

IGT1

G–R

L–B

BR

B–R

LG–B

1 3

I 4

IGN

ITE

R A

ND

IGN

ITIO

N C

OIL

NO

. 2

4 2

IGT2

LG–B

L–W

BR

B–R

G–B

1 3

I 5

IGN

ITE

R A

ND

IGN

ITIO

N C

OIL

NO

. 3

4 2

IGT3

G–B

L–W

BR

E 7

I 3

E 5E 5E 5

EC

BR

W–R

B–R B–R

L–W

BR

L–B

BRBR

IGNITION SWI23

BATTERY

2

ENGINE CONTROL MODULEE 7

9 8 25B

–R

1

BR

2NO

ISE

FIL

TER

N 1

E 7

B–R

B–L

( *1)

E 7B–R

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B–R B–L

1 3

I 6

IGN

ITE

R A

ND

IGN

ITIO

N C

OIL

NO

. 4

4 2

IGT4

B–L

L–B

BR

B–R

G–W

1 3

I 7

IGN

ITE

R A

ND

IGN

ITIO

N C

OIL

NO

. 5

4 2

IGT5

G–W

L–W

BR

B–R P–L

1 3

I 8

IGN

ITE

R A

ND

IGN

ITIO

N C

OIL

NO

. 6

4 2

IGT6

P–L

L–B

BR

B–R

R–W

1 3

I 9

IGN

ITE

R A

ND

IGN

ITIO

N C

OIL

NO

. 7

4 2

IGT7

R–W

L–B

BR

B–R LG

1 3

I10

IGN

ITE

R A

ND

IGN

ITIO

N C

OIL

NO

. 8

4 2

IGT8

LGL–

W

BR

IGF2 IGF1

E 7

E 5

I 3

E 5

I 3

E 5

I 3

E 5

I 3

I 3

L–W

L–B

B–R

L–B

BR

L–W

BR

L–B

BR

L–W

BR

L–B L–B

BR

L–W

B–R

ENGINE CONTROL MODULEE 7

11 12 26 13 10 23 24

E 7E 7E 7

* 1 : TOWING PACKAGE* 2 : EXCEPT TOWING PACKAGE

B–R B–R

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IGNITION (2UZ–FE)

I23 IGNITION SW7–6 : Closed with ignition SW at ON or ST position

: PARTS LOCATION

Code See Page Code See Page Code See Page

E7 34 I6 31 (2UZ–FE) I10 31 (2UZ–FE)

I3 31 (2UZ–FE) I7 31 (2UZ–FE) I23 35

I4 31 (2UZ–FE) I8 31 (2UZ–FE) N1 31 (2UZ–FE)

I5 31 (2UZ–FE) I9 31 (2UZ–FE)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1I22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1I26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1J26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IE1 46 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

: GROUND POINTS

Code See Page Ground Points Location

EC 40 (2UZ–FE) Rear Bank of Left Cylinder Head

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

E540 (2UZ FE) Engine Wire

I3 46 Engine Wire

E740 (2UZ–FE) Engine Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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2003 TOYOTA TUNDRA (EWD491U)

71

MEMO

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2003 TOYOTA TUNDRA (EWD491U)

72

IGNITION (5VZ–FE)

30AAM2

2

1

2

2

1I4

1J7

IE11

I 3

2

1

I 3I 3

2

1

2

1

2

1

ED

IE15

IGNITION SWI23

B–R

B–R

B–R

B–R B–R

B–R

B–R

B–R

W–GLR

B–R

B–R

B

10 2 1 9 8

IGN

ITIO

N C

OIL

NO

. 1I1

1

IGN

ITIO

N C

OIL

NO

. 2I1

2

IGN

ITIO

N C

OIL

NO

. 3I1

3

NO

ISE

FIL

TE

RN

1

TO C

OM

BIN

AT

ION

ME

TER

3 7 6 5 4

W–B

B–L

R–L LG B–Y

IGNITERI 2

BR

BATTERY

BW

–R

IGT1 IGT2 IGT3 IGF

7 6AM2 IG2

ST2

B

ENGINE CONTROL MODULEE 6

11 10 9 2

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73

I23 IGNITION SW7–6 : Closed with ignition SW at ON or ST position

: PARTS LOCATION

Code See Page Code See Page Code See Page

E6 34 I12 33 (5VZ–FE) N1 33 (5VZ–FE)

I2 33 (5VZ–FE) I13 33 (5VZ–FE)

I11 33 (5VZ–FE) I23 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1I22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1I26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1J26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IE1 46 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

: GROUND POINTS

Code See Page Ground Points Location

ED 42 (5VZ–FE) Intake Manifold Left

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I3 46 Engine Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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74

CHARGING

5 1E

10AGAUGE

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

10 1F

5AIGN

C

C

4

3

EB11EB12

IA57

EB14

22

2 B4 B2 B3 A1

* 1 : W/ DAYTIME RUNNING LIGHT* 2 : W/O DAYTIME RUNNING LIGHT

B

W

B–Y W

B W

JUN

CT

ION

CO

NN

EC

TO

R

J 1

Y–G

B–Y

Y–G

Y–G

(*2)

(*1)

Y–G B–Y W B

B–O

B( *

4)

1

1

2

2

CH

AR

GE

WA

RN

ING

LIG

HT

[CO

MB

. M

ETE

R]

C12

7. 5

A A

LT–S

140A

ALT

(*3

)10

0A A

LT (

*4)

BATTERY

L IG B

IC REGULATOR

S

G 1

GENERATOR

BA , G 2

Y–G

(*1)

A

A

A

JUNCTIONCONNECTOR

J11

Y–G ( *1)

TO IN

TE

GR

ATI

ON

RE

LAY

B–L

( *3)

* 3 : TOWING PACKAGE* 4 : EXCEPT TOWING PACKAGE

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G2 (B) GENERATOR(B) 3–GROUND : 13.9–15.1 volts with engine running at 2000 rpm and 25°C (77°F)

13.5–14.3 volts with engine running at 2000 rpm and 115°C (239°F)(B) 1–GROUND : 0–4 volts with ignition SW at ON position and engine not running

: PARTS LOCATION

Code See Page Code See Page Code See Page

C12 34G2 B

30 (2UZ–FE) J1 33 (5VZ–FE)

G1 A30 (2UZ–FE)

G2 B32 (5VZ–FE) J11 35

G1 A32 (5VZ–FE) J1 31 (2UZ–FE)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1E22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1E26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1F22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EB140 (2UZ–FE)

Engine No 2 Wire and Engine Room Main Wire (Under the Engine Room R/B)EB142 (5VZ–FE)

Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B)

IA5 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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ENGINE CONTROL (2UZ–FE)

30AAM2

2

1

2

2

5 1

3 2

2 2

2 2

5 1

3 2

2 2

2 2

15AEFI NO. 1

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

2

EA

IA426

IGNITION SWI23

B–W

W–R

B–R

B–R

B–Y

B–W

B–R

B–R

B–Y

B

EFI

RE

LAY

C/O

PN

RE

LAY

W–L

B–W

Y

W–B

W–L

BA

TTE

RY

Y

W–L

B

Y

W–B

2

7 6

8

1

1I3

5ASTA

1F6

B

1

2

2

SH

OR

T P

INB

–L

( *1)

( *2)

2

5A E

CU

–B

2

1

2

B

4 1

3 2

AD

BF

IA517IA49

AM2

ACC

IG2

ST2

3

W–R

L–R

W–R

W–R

W–R

L–R

W–R

L–R

( *4)

( *3)

( *3)

JUN

CT

ION

CO

NN

EC

TOR

BJ2

1A

, J2

2

ACC CUTRELAY

A22

IE18

G–Y

JUNCTIONCONNECTOR

J18

A

A

W–B

G–Y

L–O

G–Y

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1 5

2 3

4

2 2

2 2

2

A

IF

J 3JUNCTIONCONNECTOR

IA45

BB13

5

4

BB112

2

1

2

1

10AEFINO. 2

2

2

1

2

7. 5AOBD

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

CG SG SIL

IE125

IA414

B–R

B–Y

B–W

B–RF/

PM

P R

ELA

Y

B–W

L–O

L–O

W–B

A

Y

W–L

B

W–B

L–O

FUE

L P

UM

PR

ES

ISTO

R

F 5

VS

V (

VA

PO

RP

RE

SS

UR

E S

EN

SO

R)

V 9

W–L

R

B A

16

B

4 5 7

BAT

Y

R

W–L R

W–L

L–W

BR

W–B W

EC

L–W

W–L

BR

IE11

R

W–B

FUE

L P

UM

PF1

0

L–O

L–B

B–W

B–L

TC

13

W–G

15

WFSE

L–W

M

1B4

B

JUN

CTI

ON

CO

NN

EC

TOR

J 1

A

AJUN

CTI

ON

CO

NN

EC

TOR

J 8

BF

AG

AH

BH

JUN

CTI

ON

CO

NN

EC

TOR

BJ1

4A

, J1

5

JUN

CT

ION

CO

NN

EC

TO

R

BJ1

4A

, J1

5R

DA

TA L

INK

CO

NN

EC

TO

R 3

D 6

EA18

B–L

B–R

B–Y

B–W

B–L

L–W

B–R

G–Y

W

W–G

L–W

Y

W–L

G–Y

R

B

* 1 : TOWING PACKAGE* 2 : EXCEPT TOWING PACKAGE* 3 : W/ DOOR LOCK CONTROL* 4 : W/O DOOR LOCK CONTROL

IA418

R

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ENGINE CONTROL (2UZ–FE)

2

1

INJE

CTO

R N

O.

1I1

4

2

1

INJE

CTO

R N

O.

3I1

6

2

1

INJE

CTO

R N

O.

5I1

8

2

1

INJE

CTO

R N

O.

7I2

0

E 6

E1 E3 E5 C6

R G L

L–R

B–R

B–R

B–R

B–R

#1 #3 #5 #7

B–R

A2

2 4

1 3

HE

ATE

D O

XY

GE

N S

EN

SO

R( B

AN

K 2

SE

NS

OR

1)

H 5

D33 D22A1

I 3

I 5

+B2 +B HT2A OX2A

W–L

W–L

Y–G W

B–WR

R

( *5)

* 5 : SHIELDED

W–L

HTR OX

+B E1

W–B

5AIGN

1F11

1J7

1K6

1I4

A9E33 A8 A3

E16

B

B

A18 27 E A10 C12A20

D

D

D

W–G

J 8

B–Y

B–R

B–Y

B–L

B–R

B–L

B–R

B–R

B–R

B–O

B–O

CCV FCSIL

E 3

ENGINE CONTROL MODULE

BA , E 4 C, E 5 E 6, D

JUN

CTI

ON

CO

NN

EC

TOR

J 5

W–G BY

L–WW

JUN

CTI

ON

CO

NN

EC

TOR

D

STSWTC

FPR MREL BATT IGSW

NSW

B–W

IA415 IA46

A19

L–W

WFSE

IE123

B–W

JUN

CT

ION

CO

NN

EC

TO

R

J 5

L–W

E 7, E

B–Y

B–R

B–R

E15

ACCR

G–Y

IE116

W

W

W–G

L–W

Y

W–L

G–Y

R

B

L–W

IE115

B

E17

STA

PTO

PA

RK

/NE

UTR

AL

PO

SIT

ION

SW

FRO

M P

AR

K/N

EU

TRA

LP

OS

ITIO

N S

W

W–B

D9

STAR

FRO

M P

AR

K/N

EU

TRA

LP

OS

ITIO

N S

W

B–R

B–RIE121

E 6B–R B–R

(*5)

R

B–W

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2

1

INJE

CTO

R N

O.

2I1

5

2

1

INJE

CTO

R N

O.

4I1

7

2

1

INJE

CTO

R N

O.

6I1

9

2

1

INJE

CTO

R N

O.

8I2

1E 6

IGN

ITE

R A

ND

IG

NIT

ION

CO

IL N

O. 1

I 3

IGN

ITE

R A

ND

IG

NIT

ION

CO

IL N

O. 2

I 4

IE13

E 7 E 7

E2 E4 D3 C5 E9 E8

W R–B Y

R–W

G–R

LG–B

B–R

B–R

B–R

B–R

B–R L–B

B–R

L–W

1 2 1 2

3 3

#2 #4 #6 #8 IGT1 IGT2

B–R

B–RB–R B–R

B–R

IGN

ITE

R A

ND

IG

NIT

ION

CO

IL N

O. 3

I 5

1 2

3

IGN

ITE

R A

ND

IG

NIT

ION

CO

IL N

O. 4

I 6

1 2

3

E25 E11

G–B

IGT3

B–L

IGT4

I 3

I 3

E 7 E 7

L–W

B–R L–B

L–B

L–W

B–R

2 4

1 3

HE

ATE

D O

XY

GE

N S

EN

SO

R( B

AN

K 1

SE

NS

OR

1)

H 3

2 4

1 3

HE

ATE

D O

XY

GE

N S

EN

SO

R( B

AN

K 2

SE

NS

OR

2)

H 6

2 4

1 3

HE

ATE

D O

XY

GE

N S

EN

SO

R( B

AN

K 1

SE

NS

OR

2)

H 4

D4 D23 D25 D21 D5 D29

I 3 I 3 I 3

I 3 I 3 I 3

I 3

I 3

I 3

I 3

EC

C1

HT1A OX1A HT2B OX2B HT1B OX1B E1

G–Y B

Y–B W R–Y B B

RB

RB

R

R

B–W

B–WR

B–WR

R

BR

BR

BR

R R

B–W

R

B–W

BR

Y–B W

BR–Y

I 3

D1 D2

E 4

1 1

KN

OC

KS

EN

SO

R 2

K 2

KN

OC

KS

EN

SO

R 1

K 1

BR

GR

B

GR B

BR

KNK1 KNK2

(*5)

( *5)

( *5)

( *5)

( *5)

( *5)

( *5)

E 8

BR

HTL OX2 HTR2 OXR2 HTL2 OXL2

+B E1 +B E1 +B E1

(*5)

B–R

B–RE 6

B–R

E 3

ENGINE CONTROL MODULE

BA , E 4 C, E 5 E 6, D E 7, E

B–R B–R

L–B

L–W

(*5)

B–WI 3

B–W

EC23 EC22 EC21

B–W

R

BR

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ENGINE CONTROL (2UZ–FE)

GY

E01E02E03ME01NE+G2–G2PRG

R

R

BR

W–B

W–B

, B

Y L R G

W–B

W–B

W–B

W–BL

W–G

A

BR

R R

C 2CRANKSHAFT POSITIONSENSOR

C 1CAMSHAFT POSITIONSENSOR

ENGINE CONTROL MODULE

E 3 A

IGN

ITE

R A

ND

IG

NIT

ION

CO

IL N

O. 5

I 7

1 2

3

E 4

IGN

ITE

R A

ND

IG

NIT

ION

CO

IL N

O. 6

I 8

1 2

3

,

IGN

ITE

R A

ND

IG

NIT

ION

CO

IL N

O. 7

I 9

1 2

3IG

NIT

ER

AN

D I

GN

ITIO

NC

OIL

NO

. 8

I10

1 2

3

C

E12 E26 13 E E10

G–W

IGT5

P–L

IGT6

R–W

IGT7

LG

IGT8L–

WIGF2

A

L–B

IGF1

E23 E24

EB

7 E6 EC24

R

NE–

74

E 7

C C C

I 3

25

E 7

2 1

I 3 I 3

A

I 3

B–R

L–W

B–R L–B

B–R L–B

L–W

32

B–R

C27 C

B–R B–R

L–B

L–W

1

L–B

2

L–B

L–W

34 E

I 3

2

1

VS

V( E

VA

P)

V 4

(*5) (*5)

B–R

L–B

L–W

E 7

B–W

JUNCTIONCONNECTOR

J19

B–W

E 5 E, , DE 6 E 7

B–R

I 3B–W

LCK1

G–W

23 C

A/C

LO

CK

SE

NS

OR

A 3

B–W

1

2

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15ATAIL

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1G4

15ASTOP

1F2

10AETCS

2

1

2

C

1D4

1D1

B19 A12 B6

2

1

E

E

IA51

A11B17A5B4

4

6

C G–W

L–W

G–O

V–G

G–Y

GG

G–Y

W–G

W–G

L–R

L–W

G–O

V–G

JUNCTIONCONNECTOR

J10

INTEGRATIONRELAY

DIO

DE

( ID

LE–U

P)

D10

B31 B33

21 18

E20 E29 E30

2 4 5

E28

I 3 I 3

1

2

E19

6 4 5

3THROTTLE POSITIONSENSOR

T 2

E21 E31

MA

SS

AIR

FLO

W M

ET

ER

M 1

EN

GIN

E C

OO

LAN

TTE

MP

. S

EN

SO

R

E 2

R

L

L–B

Y–G B–Y

R–W

B–W

G

B–Y

P–L

G–B

B–W

B–W

A/CS ACLD THA E2G VG E2 THWVTA1 VTA2

STP ELS +BM L4 TACH SPD W

TO D

ETE

CT

ION

SW

( TR

AN

SF

ER

L4

PO

SIT

ION

)

STO

P L

IGH

TS

W

S 4

JUNCTIONCONNECTOR

J10

3 1

G–W

G–W

2

B–W

B–W

1

B–WB–W

, B

ENGINE CONTROL MODULE

E 3 A E 4, CE 5 E, , DE 6 E 7

A14

R–B

F/PS

8 DG

R4WD

II11

R–B

1 2

C2 C3

R W

M– M+

17 C

GE01

I 3IA417

1

HP

B

1

2

EA

A/C

PR

ES

SU

RE

SW

A 1

BR

L–W

W–L

W–B

W–B

CC

A

A

JUNCTIONCONNECTOR

J18

W–B

JUN

CT

ION

CO

NN

EC

TO

R

J 2

G–B

B–W

( *5)

* 5 : SHIELDED

B–W

B2

ACMG

19

L–Y

INTEGRATIONCONTROL AND PANEL

I24

TO A

DD

DE

TEC

TIO

NS

W

23 CE

NTE

R A

IRB

AG

SE

NS

OR

AS

SE

MB

LY

C 5

GSW2

A/CS AIND A/CM

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ENGINE CONTROL (2UZ–FE)

G–B

B–W

B–WG–B

R–L

V–G

G–O

L–W

5 4

A28 A

EPA

P–G

V–R

26

3 6

ACCEL PEDAL POSITION SENSORA20

A23 A22 E18 A21

I 3G–B

L

R–G

G–B

VPA2 VPA VC PTNK

2 3 1

BIH B

IE118 IE122

G–B

B–W

R–L

VCPA

1 2

A27 A

VCP2

LG–R

G–R

29

EPA2

E 4

G–BG–B

B–W

AE 3

ENGINE CONTROL MODULE

B , E 7E 5 C DE 6, E, ,

VAPOR PRESSURESENSOR

V 1

BG

AE AD AF

B

B

B

THE

B–L

32 B

2

1

B–W

JUNCTIONCONNECTOR

J 9

R–L

JUN

CTI

ON

CO

NN

EC

TOR

BJ1

4A

, J1

5

B–L

V–G

G–O

L–W

B–L

A/C

TH

ER

MIS

TOR

A13

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JUNCTIONCONNECTOR

1

B–Y

BR

BR

V 2

VE

HIC

LE S

PE

ED

SE

NS

OR

( CO

MB

INA

TIO

N M

ETE

R)

J 8

32

P–L

R–L

BR

BR

R–L

P–L

C13

, A

C

CO

MB

INA

TIO

N M

ETE

R

C11

L–W

G–O

J 9JUNCTIONCONNECTOR

D

DB

–Y

B–Y

10AGAUGE

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1F8

A13 C2 B8 C8

C3 C4 A9

TAC

HO

ME

TE

R

MA

LFU

NC

TIO

NIN

DIC

AT

OR

LA

MP

IE19 IE117

IH

C

C

IE17

1F5

SP

EE

DO

ME

TER

V–G

B–Y

B–Y

G–O

V–G

L–W

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ENGINE CONTROL (2UZ–FE)

The engine control system utilizes a microcomputer and maintains overall control of the engine, transmission etc. An outlineof the engine control is given here.

1. INPUT SIGNALS(1) Engine coolant temp. signal circuit

The engine coolant temp. sensor detects the engine coolant temp. and has a built–in thermistor with a resistance whichvaries according to the engine coolant temp. The engine coolant temp. is input into TERMINAL THW of the enginecontrol module as a control signal.

(2) Intake air temp. signal circuitThe intake air temp. sensor is installed in the mass air flow meter and detects the intake air temp., which is input as acontrol signal to TERMINAL THA of the engine control module.

(3) Oxygen sensor signal circuitThe oxygen density in the exhaust emission is detected and is input as a control signal from the heated oxygen sensorsto TERMINALS OX1A, OX2A, OX1B, OX2B of the engine control module.

(4) RPM signal circuitThe camshaft position is detected by the camshaft position sensor and is input into TERMINAL G2 of the engine controlmodule as a control signal. Also, the engine RPM is detected by the crankshaft position sensor and the signal is inputinto TERMINAL NE+ of the engine control module.

(5) Throttle position sensor signal circuitThe throttle position sensor detects the throttle valve opening angle as a control signal, which is input into TERMINALSVTA1, VTA2 of the engine control module.

(6) Vehicle speed circuitThe vehicle speed sensor (Combination meter) detects the vehicle speed, and the signal is input into TERMINAL SPDof the engine control module via the combination meter.

(7) Battery signal circuitVoltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned on, thevoltage for engine control module start up power supply is applied through the EFI relay, to TERMINALS +B, +B2 of theengine control module. The current from the IGN fuse flows to TERMINAL IGSW of the engine control module, andvoltage is constantly applied to TERMINAL +BM.

(8) Intake air volume signal circuitThe intake air volume is detected by the mass air flow meter, and is input as a control signal to TERMINAL VG of theengine control module.

(9) Stop light SW signal circuitThe stop light SW is used to detect whether the vehicle is braking or not, and the signal is input into TERMINAL STP ofthe engine control module as a control signal.

(10)Starter signal circuitTo confirm whether the engine is cranking, the voltage applied to the starter motor when the engine is cranking isdetected, and is input into TERMINAL STA of the engine control module as a control signal.

(11) Engine knock signal circuitEngine knocking is detected by the knock sensors, and is input into TERMINALS KNK1, KNK2 of the engine controlmodule as a control signal.

SYSTEM OUTLINE

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2. CONTROL SYSTEM∗ SFI system

The SFI system monitors the engine condition through the signals input from each sensors to the engine control module.The control signal is sent to the engine control module TERMINALS #1, #2, #3, #4, #5, #6, #7, #8 to operate the injector(Fuel injection). The SFI system controls the fuel injection by the engine control module in response to the drivingconditions.

∗ ESA systemThe ESA system monitors the engine condition through the signals input from each sensors to the engine control module.The best ignition timing is decided according to this data and the data memorized in the engine control module. Thecontrol signal is output to TERMINALS IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGT7, IGT8, and these signals control theigniter to provide the best ignition timing.

∗ Heated oxygen sensor heater control systemThe heated oxygen sensor heater control system turns the heater on when the intake air volume is low (Temp. of exhaustemission is low), and warms up the heated oxygen sensors to improve their detection performance. The engine controlmodule evaluates the signals from each sensors, and outputs current to TERMINALS HT1A, HT2A, HT1B, HT2B tocontrol the heater.

∗ Fuel pump control systemThe engine control module supplies current to TERMINAL FPR, and controls the operation speed of the fuel pump withthe F/PMP relay.

∗ ETCS–iThe ETCS–i controls the engine output at its optimal level in accordance with the opening of the accelerator pedal, underall driving conditions.

3. DIAGNOSIS SYSTEMWhen there is a malfunction in the engine control module signal system, the malfunctioning system is recorded in thememory. The malfunctioning system can be found by reading the code displayed on the malfunction indicator lamp.

4. FAIL–SAFE SYSTEMWhen a malfunction has occurred in any system, there is a possibility of causing engine trouble due to continued controlbased on that system. In that case, the fail–safe system either controls the system using the data (Standard values)recorded in the engine control module memory, or else stops the engine.

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ENGINE CONTROL (2UZ–FE)

EFI RELAY5–3 : Closed with ignition SW at ON or ST position

C/OPN RELAY5–3 : Closed with starter cranking or engine cranking

E2 ENGINE COOLANT TEMP. SENSOR1–2 : Approx. 16.2 kΩ (–20°C, –4°F)

: Approx. 2.45 kΩ (20°C, 68°F): Approx. 0.32 kΩ (80°C, 176°F)

E3 (A), E4 (B), E5 (C), E6 (D), E7 (E) ENGINE CONTROL MODULEBATT–E1 : Always 9.0–14.0 volts+BM–E1 : Always 9.0–14.0 volts

IGSW–E1 : 9.0–14.0 volts with ignition SW at ON or ST position+B, +B2–E1: 9.0–14.0 volts with ignition SW at ON or ST position

VC–E1 : 4.5–5.5 volts with ignition SW at ON or ST positionVTA2–E1 : 2.0–2.9 volts with ignition SW on and throttle valve fully closed

: 4.7–5.1 volts with ignition SW on and throttle valve fully openVTA1–E1 : 0.4–1.0 volts with ignition SW on and throttle valve fully closed

: 3.2–4.8 volts with ignition SW on and throttle valve fully openVPA–E1 : 0.3–0.9 volts with ignition SW on and throttle valve fully closed

: 3.2–4.8 volts with ignition SW on and throttle valve fully openVPA2–E1 : 1.8–2.7 volts with ignition SW on and throttle valve fully closed

: 4.7–5.1 volts with ignition SW on and throttle valve fully openTHA–E1 : 0.5–3.4 volts with idling, intake air temp. 0°C (32°F) –80°C (176°F)THW–E1 : 0.2–1.0 volts with idling, engine coolant temp. 60°C (140°F) –120°C (248°F)STA–E1 : 6.0 volts or more with engine cranking

W–E1 : 9.0–14.0 volts with idling and malfunction indicator lamp offSPD–E1 : Pulse generation with vehicle movingSTP–E1 : 7.5–14.0 volts with brake pedal depressed

: PARTS LOCATION

Code See Page Code See Page Code See Page

A1 30 (2UZ–FE) H5 30 (2UZ–FE) J5 35

A3 30 (2UZ–FE) H6 30 (2UZ–FE) J8 35

A13 34 I3 31 (2UZ–FE) J9 35

A20 34 I4 31 (2UZ–FE) J10 35

A22 34 I5 31 (2UZ–FE)J14 A

36 (Access Cab)

C1 30 (2UZ–FE) I6 31 (2UZ–FE)J14 A

37 (Standard Cab)

C2 30 (2UZ–FE) I7 31 (2UZ–FE)J15 B

36 (Access Cab)

C5 34 I8 31 (2UZ–FE)J15 B

37 (Standard Cab)

C11 A 34 I9 31 (2UZ–FE) J18 31 (2UZ–FE)

C13 C 34 I10 31 (2UZ–FE) J19 35

D6 34 I14 31 (2UZ–FE) J21 A 35

D10 34 I15 31 (2UZ–FE) J22 B 35

E2 30 (2UZ–FE) I16 31 (2UZ–FE) K1 31 (2UZ–FE)

E3 A 34 I17 31 (2UZ–FE) K2 31 (2UZ–FE)

E4 B 34 I18 31 (2UZ–FE) M1 31 (2UZ–FE)

E5 C 34 I19 31 (2UZ–FE) S4 35

E6 D 34 I20 31 (2UZ–FE) T2 31 (2UZ–FE)

E7 E 34 I21 31 (2UZ–FE)V1

36 (Access Cab)

F5 30 (2UZ–FE) I23 35V1

37 (Standard Cab)

F1036 (Access Cab) I24 35 V2 31 (2UZ–FE)

F1037 (Standard Cab) J1 31 (2UZ–FE) V4 31 (2UZ–FE)

H3 30 (2UZ–FE) J2 31 (2UZ–FE)V9

36 (Access Cab)

H4 30 (2UZ–FE) J3 35V9

37 (Standard Cab)

SERVICE HINTS

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: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1B22 (*2)

1B26 (*1)

1D22 (*2)

1D26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1F22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1F26 (*1)

1G22 (*2)

1G26 (*1)

1I22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1I26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1J26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1K22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1K26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EA1 40 (2UZ–FE) Cowl Wire and Engine Room Main Wire (Right Fender)

EC2 40 (2UZ–FE) Engine No.2 Wire and Engine Wire (Near the Starter)

IA444 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IA544 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IE1 46 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

II1 46 Cowl Wire and Cowl Wire (Instrument Panel Reinforcement RH)

BB148 (Access Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)BB150 (Standard Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)

: GROUND POINTS

Code See Page Ground Points Location

EA 40 (2UZ–FE) Front Left Fender

EB 40 (2UZ–FE) Rear Bank of Right Cylinder Head

EC 40 (2UZ–FE) Rear Bank of Left Cylinder Head

IF 44 Left Kick Panel

IH 44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

E4 40 (2UZ–FE) Engine No.2 Wire E8 40 (2UZ–FE)Engine Wire

E640 (2UZ FE) Engine Wire

I3 46Engine Wire

E740 (2UZ–FE) Engine Wire

I5 46 Cowl Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

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ENGINE CONTROL (5VZ–FE)

8

2

1

P

N

9

6

IE212

P

( A/T

)

IE219

W–L

W–B

B–R

P

B–R

C10

CLU

TC

H S

TAR

T S

W

P

B–R

W–B

W–B

1 5

2 3

2 2

2 2

2

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

15AEFINO. 1

2

IF

IA45 IA426

W–B

W–B

EA

W–B

( A/T

)

BB112

(A/T)

2

1

30A

AM

2

2

2

BA

TTE

RY

BW

–R

7 6AM2 IG2

ST2

Y

B–Y

A

A

BB13

Y

L–O

A

JUNCTIONCONNECTOR

J 3

I23IGNITION SW

A

1

EF

I RE

LAY

5 1

3 2

2 2

2 2

5

4

C/O

PN

RE

LAY

B–Y

P

( A/T

)

( M/T

)

P

( M/T

)

W–B

W–B

( A/T

)

W–L

L–O

F10

FUE

L P

UM

PL–

O

P

B–R

B–R

P

G–B

A

ST

RE

LAY

5 1

3 2

2 2

2 2

IA424

B–W

6 1F

5ASTA

3 1I

B

W–B

3 5

(A/T)

W–B

W–B

P

B–Y

10AGAUGE

1F7

1 7

( M/T

)

B–Y

CLU

TC

H S

TAR

TC

AN

CE

L S

W

C 9

I 1

B–R

M

( M/T

)( M

/T)

( M/T

)

( M/T

)

B–W

C

CJUN

CT

ION

CO

NN

EC

TOR

J 2

JUN

CT

ION

CO

NN

EC

TO

R

J 8

PA

RK

/NE

UTR

AL

PO

SIT

ION

SW

P 1

I 1

IE

W–B

(A/T)

AA

BA

JUNCTIONCONNECTOR

BJ23 , J24A

W–B

JUN

CTI

ON

CO

NN

EC

TOR

J18

A

A

W–L

Y

B

W–B

B–W

B–W

W

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14 A

5

16

4

13 IE1

14 IA4

W–B

BR

W–B

D 6DATA LINKCONNECTOR 3

7

WY

7. 5AOBD

ED

IE115

SGCG

BAT SIL

B3

D14

1

2

1

2

I 3

D197A1 AA3

W

B–Y

B–R

P(A/T)

B–R

P

VSV(CANISTERCLOSED VALVE)

V 9

I 5

W–L

W–L

W–L

W–L

G–W

L–W

W–L Y B

W–L R

W–L W–L

D

E 4, A B

ENGINE CONTROL MODULE

E 3 E 5, C E 6, D

( A/T

)L–

W

B

B

JUNCTIONCONNECTOR

J 1

STAFC+B CCVEVP1

NSWSIL

4 A

MREL

VS

V( E

VA

P)

V 4

IA415

JUNCTIONCONNECTOR

J 5

D

W–L

WW B–Y

W–L

W–L

W–L

W–B

16 A

BATT

IA46

B–R

B–R

1I4 1J7

1F11

5AIGN

A15

B–O

IGSW

13

W–G

TC

W–G DD W–G

IE120

7 D

TC

W–G

JUNCTIONCONNECTOR

J 8

W–L

B–Y

B

W–B

B

1K6

B–W B–W

15

L–W

WFSE

2

10AEFINO. 2

2

IA418

AH

BE JUN

CTI

ON

CO

NN

EC

TOR

BJ1

4A

, J1

5

AG

BF

IE116

RR

R

L–W

13 A

WFSE

L–W

JUNCTIONCONNECTOR

BJ14 A , J15

B–R

B

BJUN

CT

ION

CO

NN

EC

TO

R

J 5

( *1)

B–O ( *2)

B–O

( *1)

E 7, E

W–L

1B4

FROM POWER SOURCE SYSTEM(SEE PAGE 56) * 1 : W/ CRUISE CONTROL

* 2 : W/O CRUISE CONTROL

B B–O

(*1)

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ENGINE CONTROL (5VZ–FE)

E15

B11 B13 B2

25 E

I 3

I 3

E24

R–Y GR

L–R

( A/T

*3)

( *3)

( A/T

*3)

1

1

3

3

4

2

G–B

B–Y

B–W

B–W

B–W

THROTTLEPOSITIONSENSOR

T 2

VAPORPRESSURESENSOR

V 1

TO

DE

TE

CTI

ON

SW

( TR

AN

SFE

R N

EU

TRA

L P

OS

ITIO

N)

TO

AD

D D

ET

EC

TIO

N S

W

TO

DE

TE

CTI

ON

SW

( TR

AN

SFE

R L

4 P

OS

ITIO

N)

B–W

G–B

G–B

R–L

G–B

G–B

VTA VC PTNK

L44WDTFN

B–R

1

2 2

1

2

1 1

2

D5D6 D4 D3

I 3

E10 E12 E13

MA

SS

AIR

FLO

W M

ET

ER

E11

1

2

E18

EF12

I 3I 3

I 3

I 3 I 3 I 3B–R B–R B–R

R W G R–B

B–R

B–R

B–R

B–R

INJE

CTO

R N

O. 1

I14

INJE

CTO

R N

O. 2

I15

INJE

CTO

R N

O. 3

I16

INJE

CTO

R N

O. 4

I17

M 1

EN

GIN

E C

OO

LAN

TTE

MP

. S

EN

SO

R

E 2

2 3 4

1 5

G–W

R–Y

Y–G

B–W G–Y

G–Y

BR

–BB

–W

B–W

B–W

W–L

W–L

B–W B–W

W–L

W–L

EF11

THWE2THAVGE2G

#40#30#20#10

B–R

B–R

IE13

W–L

W–L

B–R

E 4, A B

ENGINE CONTROL MODULE

E 3 E 5, C E 6, D E 7, E

1

2

1

2IN

JEC

TOR

NO

. 5I1

8

INJE

CTO

R N

O. 6

I19

1 D

L

#50

8 D

Y

#60

I 3

B–R

B–R

R–B

21 A

F/PS

C10 C15

AC

CE

L P

ED

AL

SE

NS

OR

A 8

3 4 1

2

R–W R

VPA2VPA

I 3

C4

R–B

VTA2

2

IE1

19

AD

BI

AE

BH

IE122

R–L

IE126

AF

BG

JUNCTIONCONNECTOR

BJ14 , J15A

JUN

CT

ION

CO

NN

EC

TOR

BJ1

4A

, J1

5

VPA VPA2 VC

E2

B–W

B–W

B–W

R–L

G–B

GSW2

23

CENTER AIRBAGSENSOR ASSEMBLY

C 5

B–O

B–O

(*1)

(*1)

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R

R–W

29 E27 D

A9 A3

B

W–L

EE11 EE13

W–L

1

I 3

E23

B

( SH

IELD

ED

)( S

HIE

LDE

D)

E22

EE12

1

C8 C2 E9 E31

4 3 2 1 1819

THROTTLE CONTROL MOTORT 1

L–B

L–Y

L Y

G R

( SH

IELD

ED

)

BR

BR

GR

GR

W–L

KN

OC

K S

EN

SO

R 2

K 2

42

3 1BR

E10

BD14 BD12

R

R–W

BR

BR

14 IE1

1

KNK1 KNK2

M–M+CL+CL– ACTAC1

OX2B HT2B

D18

Y–R

1

PSW

1F2

20 A

G–W

G–Y

STP

(SH

IELD

ED

)

E 9

I 3

BR

BR

BR

PO

WE

R S

TEE

RIN

GO

IL P

RE

SS

UR

E S

W

P 2

STO

P L

IGH

T S

WS

4

JUNCTIONCONNECTOR

J10

2

C

KN

OC

K S

EN

SO

R 1

K 1

HE

ATE

D O

XY

GE

N S

EN

SO

R( B

AN

K 1

SE

NS

OR

2)

H 9

G–W

G–W

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

+B E1

OX HT

W–L

15ASTOP

* 1 : W/ CRUISE CONTROL

INTEGRATIONCONTROLAND PANEL

I24

BD13BD11

1D4C

1D1

D11 D10 D9 D2

7 6 5 4

IGNITERI 2

B–L

R–L LG B–Y

IGFIGT3IGT2IGT1

E17

GE01

I 3

( SH

IELD

ED

)

( SH

IELD

ED

)

E 4, A B

ENGINE CONTROL MODULE

E 3 E 5, C E 6, D E 7, E

IE125 IE123

I 3

( SH

IELD

ED

)

R

R–W

ED

W–B

W–B

W–BBR

BR

E4

I 3

17 D

BR

E5 E7

E04

8W

–BE

E03E02E01E1

BR

ME01

BR

E6

BR

BR

W–L

BR

BR

CL– CL+ M+ M–

BR

IE124

( SH

IELD

ED

)

4

3

B–O

(*1)

9 B

ST1–

L–R

ACTAC1

* 3 : 4WD

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ENGINE CONTROL (5VZ–FE)

W–L

E 5, C E 6, D E 7,

3 C 9

V

1421 EE

V–G

W–L

BR

BR

V–G

Y

A2

D12 D21

I 3

I 3

D13

I 3

E

A6

A

MA

LFU

NC

TIO

NIN

DIC

ATO

R L

IGH

T

SP

EE

DO

ME

TER

B–Y

BR

G–O

G–OL

Y

GG

R

BR

10AGAUGE

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1F5

B–Y

D

D

42

J 8JUNCTIONCONNECTOR

C

C

IH

1 3

BR

(SH

IELD

ED

)

( SH

IELD

ED

)

( SH

IELD

ED

)

8 1F

8 C13B C 8C2

AIR

FU

EL

RA

TIO

SE

NS

OR

( BA

NK

1 S

EN

SO

R 1

)

A10

V–G

2 3

P–L

G–B

P–L

G–B

IE12B

–YB

–Y

JUN

CTI

ON

CO

NN

EC

TOR

J 9

C11

COMBINATION METER

CA , C13

BR

26

I 3

AF1–

E

P

SP1G2NE–NE+

WAF1+HTAF1

IE225IE34 (M/T)

(A/T)IE23IE36

BR

BR

BR

G–O

+B AF–

HT AF+

1 VE

HIC

LE S

PE

ED

SE

NS

OR

( CO

MB

INA

TIO

N M

ETE

R)

V 2

1

2

1

2

CR

AN

KS

HA

FT P

OS

ITIO

N S

EN

SO

RC

2

CA

MS

HA

FT P

OS

ITIO

N S

EN

SO

RC

1

E 3

ENGINE CONTROL MODULE

BA , E 4

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The engine control system utilizes a microcomputer and maintains overall control of the engine, transmission etc. An outlineof the engine control is given here.

1. INPUT SIGNALS(1) Engine coolant temp. signal circuit

The engine coolant temp. sensor detects the engine coolant temp. and has a built–in thermistor with a resistance whichvaries according to the engine coolant temp. The engine coolant temp. is input into TERMINAL THW of the enginecontrol module as a control signal.

(2) Intake air temp. signal circuitThe intake air temp. sensor is installed in the mass air flow meter and detects the intake air temp., which is input as acontrol signal to TERMINAL THA of the engine control module.

(3) Oxygen sensor signal circuitThe oxygen density in the exhaust emission is detected and is input as a control signal from the heated oxygen sensorsto TERMINAL OX2B of the engine control module.

(4) RPM signal circuitThe camshaft position is detected by the camshaft position sensor and is input into TERMINAL G2 of the engine controlmodule as a control signal. Also, the engine RPM is detected by the crankshaft position sensor and the signal is inputinto TERMINAL NE+ of the engine control module.

(5) Throttle position sensor signal circuitThe throttle position sensor detects the throttle valve opening angle as a control signal, which is input into TERMINALVTA of the engine control module.

(6) Vehicle speed circuitThe vehicle speed sensor (Combination meter) detects the vehicle speed, and the signal is input into TERMINAL SP1 ofthe engine control module via the combination meter.

(7) Battery signal circuitVoltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned on, thevoltage for engine control module start up power supply is applied through the EFI relay, to TERMINAL +B of the enginecontrol module.

(8) Intake air volume signal circuitThe intake air volume is detected by the mass air flow meter, and is input as a control signal to TERMINAL VG of theengine control module.

(9) Stop light SW signal circuitThe stop light SW is used to detect whether the vehicle is braking or not, and the signal is input into TERMINAL STP ofthe engine control module as a control signal.

(10)Starter signal circuitTo confirm whether the engine is cranking, the voltage applied to the starter motor when the engine is cranking isdetected, and is input into TERMINAL STA of the engine control module as a control signal.

(11) Engine knock signal circuitEngine knocking is detected by the knock sensors, and is input into TERMINALS KNK1, KNK2 of the engine controlmodule as a control signal.

(12)A/C SW signal systemThe operating voltage of the A/C magnetic clutch is detected and input in the form of a control signal to TERMINAL AC1of the engine control module.

(13)4WD signal systemWhether or not the vehicle is operating in 4WD mode is determined, and a control signal is input to TERMINAL 4WD ofthe engine control module.

(14)Air fuel ratio signal systemThe air fuel ratio is detected and input as a control signal into TERMINAL AF1+ of the engine control module.

SYSTEM OUTLINE

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ENGINE CONTROL (5VZ–FE)

2. CONTROL SYSTEM∗ SFI system

The SFI system monitors the engine condition through the signals input from each sensors to the engine control module.The control signal is sent to the engine control module TERMINALS #10, #20, #30, #40, #50, #60 to operate the injector(Fuel injection). The SFI system controls the fuel injection by the engine control module in response to the drivingconditions.

∗ ESA systemThe ESA system monitors the engine condition through the signals input from each sensors to the engine control module.The best ignition timing is decided according to this data and the data memorized in the engine control module. Thecontrol signal is output to TERMINALS IGT1, IGT2, IGT3 and these signals control the igniter to provide the best ignitiontiming.

∗ Heated oxygen sensor heater control systemThe heated oxygen sensor heater control system turns the heater on when the intake air volume is low (Temp. of exhaustemission is low), and warms up the heated oxygen sensors to improve their detection performance. The engine controlmodule evaluates the signals from each sensors, and outputs current to TERMINAL HT2B to control the heater.

3. DIAGNOSIS SYSTEMWhen there is a malfunction in the engine control module signal system, the malfunctioning system is recorded in thememory. The malfunctioning system can be found by reading the code displayed on the malfunction indicator lamp.

4. FAIL–SAFE SYSTEMWhen a malfunction has occurred in any system, there is a possibility of causing engine trouble due to continued controlbased on that system. In that case, the fail–safe system either controls the system using the data (Standard values)recorded in the engine control module memory, or else stops the engine.

EFI RELAY5–3 : Closed with ignition SW at ON or ST position

C/OPN RELAY5–3 : Closed with starter cranking or engine cranking

T2 THROTTLE POSITION SENSOR2–1 : Approx. 2.5–6.0 kΩ

E2 ENGINE COOLANT TEMP. SENSOR1–2 : Approx. 15.0 kΩ (–20°C, –4°F)

Approx. 2.45 kΩ (20°C, 68°F)Approx. 0.32 kΩ (80°C, 176°F)

E3 (A), E4 (B), E5 (C), E6 (D), E7 (E) ENGINE CONTROL MODULEBATT–E1 : Always 9.0–14.0 volts

+B–E1 : 9.0–14.0 volts with ignition SW at ON or ST positionVC–E1 : 4.5–5.5 volts

VTA–E1 : 0.3–1.0 volts with ignition SW on and throttle valve fully closed: 3.2–4.9 volts with ignition SW on and throttle valve fully open

THA–E1 : 0.5–3.4 volts with idling, intake air temp. 0°C (32°F) –80°C (176°F)THW–E1 : 0.2–1.0 volts with idling, engine coolant temp. 60°C (140°F) –120°C (248°F)STA–E1 : 6.0 volts or more with engine cranking

W–E1 : 9.0–14.0 volts with idling and malfunction indicator lamp offSP1–E1 : Pulse generation with vehicle movingSTP–E1 : 7.5–14.0 volts with brake pedal depressed

SERVICE HINTS

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: PARTS LOCATION

Code See Page Code See Page Code See Page

A8 32 (5VZ–FE) H9 37 (Standard Cab)J15 B

36 (Access Cab)

A10 32 (5VZ–FE) I2 33 (5VZ–FE)J15 B

37 (Standard Cab)

C1 32 (5VZ–FE) I14 33 (5VZ–FE) J18 33 (5VZ–FE)

C2 32 (5VZ–FE) I15 33 (5VZ–FE) J23 A 35

C5 34 I16 33 (5VZ–FE) J24 B 35

C9 34 I17 33 (5VZ–FE) K1 33 (5VZ–FE)

C10 34 I18 33 (5VZ–FE) K2 33 (5VZ–FE)

C11 A 34 I19 33 (5VZ–FE) M1 33 (5VZ–FE)

C13 C 34 I23 35 P1 33 (5VZ–FE)

D6 34 I24 35 P2 33 (5VZ–FE)

E2 32 (5VZ–FE) J1 33 (5VZ–FE) S4 35

E3 A 34 J2 33 (5VZ–FE) T1 33 (5VZ–FE)

E4 B 34 J3 35 T2 33 (5VZ–FE)

E5 C 34 J5 35V1

36 (Access Cab)

E6 D 34 J8 35V1

37 (Standard Cab)

E7 E 34 J9 35 V2 33 (5VZ–FE)

F1036 (Access Cab) J10 35 V4 33 (5VZ–FE)

F1037 (Standard Cab)

J14 A36 (Access Cab)

V936 (Access Cab)

H9 36 (Access Cab)J14 A

37 (Standard Cab)V9

37 (Standard Cab)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1B22 (*2)

1B26 (*1)

1D22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1D26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1F22 (*2)

1F26 (*1)

1I22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1I26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1J26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1K22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1K26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EE1 42 (5VZ–FE) Sensor Wire and Engine Wire (Over the Cylinder Head)

EF1 42 (5VZ–FE) Engine Wire and Sensor Wire (Over the Cylinder Head)

IA4 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IE1

IE2 46 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

IE3

g ( g )

BB148 (Access Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)BB150 (Standard Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)

BD148 (Access Cab)

Frame Wire and Cowl Wire (Under the Front Passenger’s Seat)BD150 (Standard Cab)

Frame Wire and Cowl Wire (Under the Front Passenger’s Seat)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

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2003 TOYOTA TUNDRA (EWD491U)

96

ENGINE CONTROL (5VZ–FE)

: GROUND POINTS

Code See Page Ground Points Location

EA 42 (5VZ–FE) Front Left Fender

ED 42 (5VZ–FE) Intake Manifold Left

IE44 Left Kick Panel

IF44 Left Kick Panel

IH 44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

E9 42 (5VZ–FE) Engine Wire I3 46 Engine Wire

E10 42 (5VZ–FE) Sensor Wire I5 46 Cowl Wire

I1 46 Cowl Wire

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2003 TOYOTA TUNDRA (EWD491U)

97

MEMO

Page 97: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

98

HEADLIGHT (w/ DAYTIME RUNNING LIGHT)

2

3

1

2

3

1

2

2

1

2

2

1

2 2

3 2

5 1

2 2

2

4 5 2

1

222

OFF

TAIL

HEAD

LOW

HIGH

FLASH

LIG

HT

CO

NTR

OL

SW

DIM

ME

R S

W

8 7

A

IF

J 3JUNCTIONCONNECTOR

16

1 2 1 2

3 3

G–W R–L L

R–W

A

A

5 2

3 1

2 2

2 2

B

B

2

A

A

EA

R

Y–B

G–Y(*6)

GR

R–B

R–B

VGR

Y–B

H–LPRELAY

DIM

ME

R R

ELA

Y

W–B

10A

HE

AD

LL

10A

HE

AD

LH

10A

HE

AD

RL

10A

HE

AD

RH

W–G

W–G

W–G

W–G

W–G

A

B

R–B

JUN

CTI

ON

CO

NN

EC

TOR

J 2

DA

YT

IME

RU

NN

ING

LIG

HT

RE

SIS

TOR

D 2

JUNCTIONCONNECTOR

J 2

W–B

W–B

HEADLIGHTRH

H 2HEADLIGHTLH

H 1

BA

TTE

RY

JUN

CTI

ON

CO

NN

EC

TOR

J18

W–G G

R–B

G

W–G

B–L

( *3)

W–B

I 2W–B

COMBINATIONSW

C15

R–W

W–B

DR

L N

O.

4 R

ELA

Y

2

1

A W–B

B( *

4)

F

F

G–Y(*5)

13

JUN

CTI

ON

CO

NN

EC

TOR

J 7

G–Y

( *6)

G–Y

( *5)

A

2

3

R–B

1J 1J43

1K4

A

W–B

R–WR–W

(*2)(*1)

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2003 TOYOTA TUNDRA (EWD491U)

99

1K

5

1C

6

5AECU IG

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

15ATAIL

R

Y–B

G–Y(*6)

GR

V

I 2

A

II

J13JUNCTIONCONNECTOR

A

A

IA57

R–G

W–B

Y–G

Y–G

Y–G

Y–G

4

W–B

GENERATORG 2

* 2 : 5VZ–FE* 1 : 2UZ–FE

L

W–B

R

2

1 1

1B6

1E4

2

1

W–B

G–W

W–B

EA

BR

AK

E F

LUID

LE

VE

LW

AR

NIN

G S

W

B 2

R–W

( M/T

)

W–B

( M/T

)

EB12

W–B

W–B

W–B

IA518

G–Y(*5)

FRO

M F

OG

LIG

HT

SW

[CO

MB

. S

W]

INTEGRATIONRELAY

A

AA A7

B16

IE

BA

AA

JUNCTIONCONNECTOR

BJ23 , J24A

HIG

H B

EA

M I

ND

ICA

TOR

LIG

HT

[CO

MB

. M

ETE

R]B

C11

A,

C12

JUNCTIONCONNECTOR

J18

PARKINGBRAKE SW(M/T)

P 5

PARKINGBRAKE SW(A/T)

P 5

R–W

( A/T

)

W–B

JUN

CT

ION

CO

NN

EC

TO

R

J11

IH

C

C

BR

BR

JUNCTIONCONNECTOR

J 8

1J8

R–W

W–B

W–B

R–W

9 6

* 3 : TOWING PACKAGE* 4 : EXCEPT TOWING PACKAGE* 5 : W/ DOOR LOCK CONTROL* 6 : W/O DOOR LOCK CONTROL

G–Y

( *5)

G–W

IA59

1N24 1N21N11O61N15

1O51O41O31N31N81N71N13G

–B

RY–B

G–Y

( *6)

GRV

8

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2003 TOYOTA TUNDRA (EWD491U)

100

HEADLIGHT (w/ DAYTIME RUNNING LIGHT)

When the following conditions are met while the ignition SW is ON, and if the light control SW is at OFF or TAIL position, thedaytime running light is controlled.∗ Parking brake lever is released (Parking brake SW is OFF)∗ Input signal from the generatorIf any of the following conditions are met, the daytime running light control is canceled.∗ Ignition SW is turned OFF.∗ Light control SW is at HEAD position.

H–LP RELAY5–3 : Closed with light control SW at HEAD position or dimmer SW at FLASH position

Closed with engine running and parking brake lever released

DIMMER RELAY3–5 : Closed with HEAD relay on and dimmer SW at HIGH or FLASH position

: PARTS LOCATION

Code See Page Code See Page Code See Page

B230 (2UZ–FE)

H130 (2UZ–FE) J11 35

B232 (5VZ–FE)

H132 (5VZ–FE) J13 35

C11 A 34H2

30 (2UZ–FE)J18

31 (2UZ–FE)

C12 B 34H2

32 (5VZ–FE)J18

33 (5VZ–FE)

C15 34J2

31 (2UZ–FE) J23 A 35

D230 (2UZ–FE)

J233 (5VZ–FE) J24 B 35

D232 (5VZ–FE) J3 35 P5 35

G230 (2UZ–FE) J7 35

G232 (5VZ–FE) J8 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1B26 (*1) Cowl Wire and Driver Side J/B (Lower Finish Panel)

1C26 (*1) Cowl Wire and Driver Side J/B (Lower Finish Panel)

1E 26 (*1) Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1J 26 (*1) Cowl Wire and Driver Side J/B (Lower Finish Panel)

1K 26 (*1) Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1N27 (*1) Cowl Wire and Driver Side J/B (Lower Finish Panel)

1O27 (*1) Cowl Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EB140 (2UZ–FE)

Engine No 2 Wire and Engine Room Main Wire (Under the Engine Room R/B)EB142 (5VZ–FE)

Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B)

IA5 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SYSTEM OUTLINE

SERVICE HINTS

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2003 TOYOTA TUNDRA (EWD491U)

101

: GROUND POINTS

Code See Page Ground Points Location

EA40 (2UZ–FE)

Front Left FenderEA42 (5VZ–FE)

Front Left Fender

IE44 Left Kick Panel

IF44 Left Kick Panel

IH44 Right Kick Panel

II44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I2 46 Cowl Wire

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2003 TOYOTA TUNDRA (EWD491U)

102

HEADLIGHT (w/o DAYTIME RUNNING LIGHT)

10AHEAD LH

2

10AHEAD RH

2

2 1

3

2 1

3

A

A BBA

2

2 3

1 5

2 2

1K5

1C6

OFF

TAIL

HEAD

LOW

HIGH

FLASH

LIG

HT

CO

NTR

OL

SW

DIM

ME

R S

W

1C7

A

1K4

1J3

1J

4

B

A

A

II

J13JUNCTIONCONNECTOR

I 2

16

W–B

W–B

W–B

W–B

R–G

13 8 7 17COMBINATION SWC15

JUNCTIONCONNECTOR

J11

RG

–Y

R R–Y

R–G

R–G

R–Y

R–Y

R–Y

R–G

R

BA

TTE

RY

R–Y

R–G

R–G

R–Y

R–WR–L

R–B

R–BR

B–L

( *1)

HEADLIGHTRH

H 2HEADLIGHTLH

H 1

JUNCTIONCONNECTOR

J 2

1 1

3 2

2

H–LPRELAY

INTE

GR

AT

ION

RE

LAY

JUNCTIONCONNECTOR

J 3

IF

A

1L6

1L5

B( *

2) IA59

B16

A7

HIGH BEAMINDICATOR LIGHT[COMB. METER]

BC11 , C12A

BA

AA

IE

W–B

JUNCTIONCONNECTOR

BJ23 , J24A

F

F

( *4)JUNCTION

CONNECTOR

J 7

G–Y

(*3)

G–Y

(*3)

* 1 : TOWING PACKAGE* 2 : EXCEPT TOWING PACKAGE* 3 : W/ DOOR LOCK CONTROL* 4 : W/O DOOR LOCK CONTROL

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2003 TOYOTA TUNDRA (EWD491U)

103

H–LP RELAY5–3 : Closed with light control SW at HEAD position or dimmer SW at FLASH position

: PARTS LOCATION

Code See Page Code See Page Code See Page

C11 A 34H2

30 (2UZ–FE) J7 35

C12 B 34H2

32 (5VZ–FE) J11 35

C15 34J2

31 (2UZ–FE) J13 35

H130 (2UZ–FE)

J233 (5VZ–FE) J23 A 35

H132 (5VZ–FE) J3 35 J24 B 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1C22 (*2) Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2) Cowl Wire and Driver Side J/B (Lower Finish Panel)

1K 22 (*2) Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1L 23 (*2) Cowl Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA5 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

: GROUND POINTS

Code See Page Ground Points Location

IE44 Left Kick Panel

IF44 Left Kick Panel

II 44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I2 46 Cowl Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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2003 TOYOTA TUNDRA (EWD491U)

104

FOG LIGHT (w/ DAYTIME RUNNING LIGHT)

20AFOG

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

2

2

10AHEAD LL

3

1

2

2

2

2

1

1 5

2 3

2 2

2 2

GG

–WL–R

EA

D

D

2

1

2

1

A

A

FRO

NT

FOG

LIG

HT

LHF 1

FRO

NT

FOG

LIG

HT

RH

F 2

P

P

W–B

W–B

P

W–B

W–B

D

A

JUNCTIONCONNECTOR

J 2

2

2 3

1 5

22

1K5

1C6

OFF

TAIL

HEADLIG

HT

CO

NTR

OL

SW

A

IF

J 3JUNCTIONCONNECTOR

F

F

11

10

16

R–B

R R–B

BA

TTE

RY

13

G–B

R–Y

W–B

P

COMBINATION SWC15

FOG LIGHT SW[COMB. SW]

C15

JUNCTIONCONNECTOR

J 7

FOGRELAY

R

JUNCTIONCONNECTOR

J18

5 42

3

DIMMERRELAYH–LP

RELAY

IA58R–Y

A

II

J13JUNCTIONCONNECTOR

W–B

I 2

W–B

INTEGRATIONRELAY

G–Y

( *4)

G–Y

( *3)

G–Y

( *3)

2

1

R–B

B–L

( *1)

B ( *2)

B

(*2)B–L

(*1)

* 1 : TOWING PACKAGE* 2 : EXCEPT TOWING PACKAGE* 3 : W/ DOOR LOCK CONTROL* 4 : W/O DOOR LOCK CONTROL

1O4

1O51N3

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2003 TOYOTA TUNDRA (EWD491U)

105

FOG RELAY3–5 : Closed with light control SW at HEAD position, dimmer SW at LOW position and fog light SW at ON position

: PARTS LOCATION

Code See Page Code See Page Code See Page

C15 34 F2 32 (5VZ–FE) J7 35

F130 (2UZ–FE)

J231 (2UZ–FE) J13 35

F132 (5VZ–FE)

J233 (5VZ–FE)

J1831 (2UZ–FE)

F2 30 (2UZ–FE) J3 35J18

33 (5VZ–FE)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1C 26 (*1) Cowl Wire and Driver Side J/B (Lower Finish Panel)

1K 26 (*1) Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1N27 (*1) Cowl Wire and Driver Side J/B (Lower Finish Panel)

1O27 (*1) Cowl Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA5 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

: GROUND POINTS

Code See Page Ground Points Location

EA40 (2UZ–FE)

Front Left FenderEA42 (5VZ–FE)

Front Left Fender

IF 44 Left Kick Panel

II 44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I2 46 Cowl Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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2003 TOYOTA TUNDRA (EWD491U)

106

FOG LIGHT (w/o DAYTIME RUNNING LIGHT)

10AHEAD LH

2

H 2

R–W

10AHEAD RH

2

2 1

3

2 1

3

2

R–L

2 3

1 5

2 2

1K5

1C6

OFF

TAIL

HEAD

LOW

HIGH

FLASH

LIG

HT

CO

NTR

OL

SW

DIM

ME

R S

W

1C7

13 8 7COMBINATION SWC15

RG

–Y

R R–Y

R

HEADLIGHTLH

H 1

BA

TTE

RY

R–Y

HEADLIGHTRH

R

20AFOG

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

2

1

2

FO

G R

ELA

Y

22

32

51

2

D

D

2

1

2

1

A

EA

JUNCTIONCONNECTOR

J18

AA

A

W–B

W–B

W–B

P P

W–B

D

JUNCTIONCONNECTOR

J 2

W–B P

L–R

R–G

R–G

A

A

3 2

1 1

A R–Y

G–R

R–Y

A

10

11

A

IF

J 3JUNCTIONCONNECTOR

16

W–B

G–R

R–Y

R–Y

G–R

R–Y

R–B

2

FOG LIGHT SW[COMB. SW]

C15

AA

J11JUNCTIONCONNECTOR

JUNCTIONCONNECTOR

J 2

2

H–LPRELAY

INTE

GR

AT

ION

RE

LAY

FRO

NT

FOG

LIG

HT

LHF

1

FRO

NT

FOG

LIG

HT

RH

F 2

A

II

J13JUNCTIONCONNECTOR

I 2

W–B

W–B

1L6

1L5

* 1 : TOWING PACKAGE* 2 : EXCEPT TOWING PACKAGE* 3 : W/ DOOR LOCK CONTROL* 4 : W/O DOOR LOCK CONTROL

B–L

( *1) B ( *2)

IA59 IA58

F

F

( *4)

JUN

CTI

ON

CO

NN

EC

TOR

J 7

G–Y

(*3)

G–Y

(*3)

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2003 TOYOTA TUNDRA (EWD491U)

107

FOG RELAY3–5 : Closed with light control SW at HEAD position, dimmer SW at LOW position and fog light SW at ON position

: PARTS LOCATION

Code See Page Code See Page Code See Page

C15 34 H1 32 (5VZ–FE) J7 35

F130 (2UZ–FE)

H230 (2UZ–FE) J11 35

F132 (5VZ–FE)

H232 (5VZ–FE) J13 35

F230 (2UZ–FE)

J231 (2UZ–FE)

J1831 (2UZ–FE)

F232 (5VZ–FE)

J233 (5VZ–FE)

J1833 (5VZ–FE)

H1 30 (2UZ–FE) J3 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1C 22 (*2) Cowl Wire and Driver Side J/B (Lower Finish Panel)

1K 22 (*2) Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1L 23 (*2) Cowl Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA5 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

: GROUND POINTS

Code See Page Ground Points Location

EA40 (2UZ–FE)

Front Left FenderEA42 (5VZ–FE)

Front Left Fender

IF 44 Left Kick Panel

II 44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I2 46 Cowl Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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2003 TOYOTA TUNDRA (EWD491U)

108

BACK–UP LIGHT

* 2 : 5VZ–FE* 3 : 5VZ–FE A/T

* 5 : W/O DOOR LOCK CONTROL

10AGAUGE

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1F7

15AACC

1G111F8 1F9

E

E A

A3

1

2

3 2

5 1

C C

IE14IE12

(*3)(M/T)

B2

A3

A2

B1

IE112IE215 (*3)

(M/T)(A/T)(M/T)

L–B(*3)R–B(*1)

R–B(*2)

B 1

BACK–UP LIGHTSW (M/T)

B

P 1

BACK–UP LIGHT SW[PARK/NEUTRAL POSITION SW](A/T)

A

B–Y

B–Y

B–Y GR

( A/T

)

( M/T

)

( A/T

)

( *4)

GR

GR(*4)

B–Y(A/T)

B–Y

(*5)

DIODE (A/T)D 8

JUNCTIONCONNECTOR

J 8

(M/T)

R–B R–B

B–Y

R–B

W–B

R–B

R–B

(A/T) (*1)

(A/T)

( A/T

)( A

/T)

( A/T

)

( M/T

)

JUNCTIONCONNECTOR

J12

BACK–UPLIGHTRELAY

B 3

3

5

3

5

B10 B10

IE

I 1

BACK–UP LIGHT RH[REAR COMB. LIGHT RH]

R 5BACK–UP LIGHT LH[REAR COMB. LIGHT LH]

R 4

W–B

R–B

R–B

W–B

W–B

W–B

W–B W–B

IE1

2

R–B

( *3)

IE126

B–Y(M/T)

L–B(*1)

W–B

L–B(*3)

L–B(*1)

* 1 : 2UZ–FE

* 4 : W/ DOOR LOCK CONTROL

JUNCTIONCONNECTOR

J 9

BL

TO TRAILER SOCKET

Y

B10B10

BB17

R–B

R–B

BB2

3

BA

AAJUN

CTI

ON

CO

NN

EC

TOR

BJ2

3A

, J2

4

W–B

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P1 (A) BACK–UP LIGHT SW [PARK/NEUTRAL POSITION SW] (A/T),B1 (B) BACK–UP LIGHT SW (M/T)(A) 3–(A) 2, (B) 2–(B) 1 : Closed with shift lever in R position

B3 BACK–UP LIGHT RELAY (A/T)5–3 : Closed with shift level in R position and ignition SW at ON position

: PARTS LOCATION

Code See Page Code See Page Code See Page

B1 B 32 (5VZ–FE) J12 35R4

36 (Access Cab)

B3 34 J23 A 35R4

37 (Standard Cab)

D8 34 J24 B 35R5

36 (Access Cab)

J8 35P1 A

31 (2UZ–FE)R5

37 (Standard Cab)

J9 35P1 A

33 (5VZ–FE)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1F22 (*2)

1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1G22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1G26 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IE146 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

IE246 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

BB148 (Access Cab)

BB150 (Standard Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)

BB248 (Access Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)

BB250 (Standard Cab)

: GROUND POINTS

Code See Page Ground Points Location

IE 44 Left Kick Panel

BL48 (Access Cab)

Surrounding of the Front of the Fuel TankBL50 (Standard Cab)

Surrounding of the Front of the Fuel Tank

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I1 46 Cowl Wire B10 50 (Standard Cab) Frame Wire

B10 48 (Access Cab) Frame Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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2003 TOYOTA TUNDRA (EWD491U)

110

TAILLIGHT

1K2

1

2

2

1J8

1E2 1H3

6 8 4

BB12

OFF

TAIL

HEAD

A

A

3

2

3

2

2

1

2

1

TAIL

LIG

HT

LH

[RE

AR

CO

MB

. LI

GH

T LH

]

R 4

TAIL

LIG

HT

RH

[RE

AR

CO

MB

. LI

GH

T R

H]

R 5

15A

TA

IL50

A J

/B

LIC

EN

SE

PLA

TE L

IGH

T R

HL

2

B10 B10 B10

B10 B10 B10

A

IF EA

BA

AA

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

B–L

( *1)

GGGGGG

J23

JUNCTIONCONNECTOR

BA , J24

JUNCTIONCONNECTOR

J 3

LIGHT CONTROLSW [COMB. SW]

C15

BA

TTE

RY

W–B

G G

W–B W–B

JUNCTIONCONNECTOR

J 1

16

14

GG

G

R–B

W–G

W–B

A

2

1

PA

RK

ING

LIG

HT

LH

[FR

ON

T T

UR

N S

IGN

AL

LIG

HT

LH

]

F 3

LIC

EN

SE

PLA

TE L

IGH

T LH

L 1

2

1

PA

RK

ING

LIG

HT

RH

[FR

ON

T T

UR

N S

IGN

AL

LIG

HT

RH

]

F 4

A

W–B

BL

AC

BA

R–B

JUNCTIONCONNECTOR

BJ21 , J22A

2

1

B ( *2)

INTEGRATION RELAY

A

AA

JUNCTIONCONNECTOR

J18

W–B

IE

BB23

W–B

I 2

140A

ALT

(*1

)10

0A A

LT (

*2)

II

A

* 1 : TOWING PACKAGE* 2 : EXCEPT TOWING PACKAGE* 3 : W/ DAYTIME RUNNING LIGHT* 4 : W/O DAYTIME RUNNING LIGHT

2

JUN

CTI

ON

CO

NN

EC

TOR

J13

W–B

1L1N

134 (*3)

(*4)

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C15 LIGHT CONTROL SW [COMB. SW]14–16 : Closed with light control SW at TAIL or HEAD position

: PARTS LOCATION

Code See Page Code See Page Code See Page

C15 34 J13 35 L1 37 (Standard Cab)

F330 (2UZ–FE)

J1831 (2UZ–FE)

L236 (Access Cab)

F332 (5VZ–FE)

J1833 (5VZ–FE)

L237 (Standard Cab)

F430 (2UZ–FE) J21 A 35

R436 (Access Cab)

F432 (5VZ–FE) J22 B 35

R437 (Standard Cab)

J131 (2UZ–FE) J23 A 35

R536 (Access Cab)

J133 (5VZ–FE) J24 B 35

R537 (Standard Cab)

J3 35 L1 36 (Access Cab)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1E22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1E26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1H22 (*2)

1H26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J26 (*1)

1K22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1K26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1L 23 (*2)Cowl Wire and Driver Side J/B (Lower Finish Panel)

1N 27 (*1)Cowl Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

BB148 (Access Cab)

BB150 (Standard Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)

BB248 (Access Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)

BB250 (Standard Cab)

: GROUND POINTS

Code See Page Ground Points Location

EA40 (2UZ–FE)

Front Left FenderEA42 (5VZ–FE)

Front Left Fender

IE44 Left Kick Panel

IF44 Left Kick Panel

II 44 Right Kick Panel

BL48 (Access Cab)

Surrounding of the Front of the Fuel TankBL50 (Standard Cab)

Surrounding of the Front of the Fuel Tank

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I2 46 Cowl Wire B10 50 (Standard Cab) Frame Wire

B10 48 (Access Cab) Frame Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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2003 TOYOTA TUNDRA (EWD491U)

112

ILLUMINATION

15A

TA

IL

1K2 1J8

1G4

6 8 4

E

E

OFF

TAIL

HEAD

50AJ/B

1

2

2

A

IF

E

14

15

4

1A7

B8B1 B7

E E

1

2 3

16

14

E

E E E

E

W–G

W–B

GG G G G

G

W–B

W–G

W–G

BR

W–G

( 2U

Z–FE

)

ME

TER

ILL

UM

INA

TIO

N[C

OM

B.

ME

TE

R]

C12

STE

ER

ING

SW

[CO

MB

. S

W]

C16

A

G–W

I24

INTEGRATION CONTROLAND PANEL

BA , I25

G

ELS

DIODE(IDLE–UP)

D10

G–Y

(2UZ–FE)

JUNCTION CONNECTORJ10

21

JUNCTION CONNECTORJ 5

A

BA

TTE

RY

LIG

HT

CO

NT

RO

L S

W[C

OM

B.

SW

]

C15

RHEOSTATR 3

W–B

II

W–B

W–B

ILL+

ILL–GND IL–1

JUNCTIONCONNECTOR

J13

W–B

W–B

W–B

I 2

A

W–B

W–B

T

E L

INTEGRATION RELAY

12

ENGINE CONTROLMODULE

E 3

AC

BA JUN

CTI

ON

CO

NN

EC

TOR

BJ2

1A

, J2

2

R–B

JUN

CTI

ON

CO

NN

EC

TOR

J 3

EDEC

BR

( 2U

Z–FE

)

BR

( 5V

Z–FE

)

IE15IE117

(2UZ–FE)(5VZ–FE)

BR

W–B

2

1

2

140A

ALT

(*1

)10

0A A

LT (

*2)

B ( *2)

B–L

( *1)

R–B

1L1N

134 (*3)

(*4)

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E

E

ID25

ID24

GG

W–G

W–G

ID26

ID23

GG

W–G

W–G

E E

EE

R 1

RA

DIO

AN

D P

LAY

ER

BA

, R

2

CIG

AR

ET

TE L

IGH

TER

ILLU

MIN

AT

ION

C 8

AS

HTR

AY

ILLU

MIN

AT

ION

A18

GLO

VE

BO

XLI

GH

T

G 3

GW

–B

G–W

JUNCTION CONNECTORJ 5

JUNCTION CONNECTORJ12

G

2A5

B102 2 1

1 1

G–W

W–BI 1

BA

AA

IE

W–B

W–B

JUNCTIONCONNECTOR

BJ23 , J24A

GW

–GM

IRR

OR

HE

ATE

R S

WM

4

2

1

E E

E

E

TO OPTIONCONNECTOR

G

* 1 : TOWING PACKAGE* 2 : EXCEPT TOWING PACKAGE* 3 : W/ DAYTIME RUNNING LIGHT* 4 : W/O DAYTIME RUNNING LIGHT

G

W–B

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2003 TOYOTA TUNDRA (EWD491U)

114

ILLUMINATION

C15 LIGHT CONTROL SW [COMB. SW]14–16 : Closed with light control SW at TAIL or HEAD position

: PARTS LOCATION

Code See Page Code See Page Code See Page

A18 34 I24 A 35 J22 B 35

C8 34 I25 B 35 J23 A 35

C12 34 J3 35 J24 B 35

C15 34 J5 35 M4 35

C16 34 J10 35 R1 A 35

D10 34 J12 35 R2 B 35

E3 34 J13 35 R3 35

G3 35 J21 A 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1G22 (*2)

1G26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J26 (*1)

1K22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1K26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1L 23 (*2)Cowl Wire and Driver Side J/B (Lower Finish Panel)

1N 27 (*1)Cowl Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

ID2 46 Cigarette Lighter Wire and Cowl Wire (Instrument Panel Brace LH)

IE1 46 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

: GROUND POINTS

Code See Page Ground Points Location

EC 40 (2UZ–FE) Rear Bank of Left Cylinder Head

ED 42 (5VZ–FE) Intake Manifold Left

IE44 Left Kick Panel

IF44 Left Kick Panel

II 44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I1 46 Cowl Wire I2 46 Cowl Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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2003 TOYOTA TUNDRA (EWD491U)

115

MEMO

Page 115: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

116

INTERIOR LIGHT

10AGAUGE

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1F5

10ADOME

2

1E6 1A3

1F3

B5A9 B9 B6

2 1

B13 B7

IF49IF11

IB49IB21

2

1

2

1

IF14IF48

IB24IB48

L–B R

L–Y

L–Y

L–Y

L–Y

L–Y

W–L

W–L

E

E

DO

OR

CO

UR

TES

YLI

GH

T R

H

D15

DO

OR

CO

UR

TES

YLI

GH

T LH

D14

(* 3)(*4)

C

BE25

BG24

1

1

2

1

2

CC C

E E

E

JUNCTIONCONNECTOR

J 4

JUNCTIONCONNECTOR

J 9

B–Y

L–Y

LL L L L

L–Y

W–L

LL

DIO

DE

( DO

OR

CO

UR

TE

SY

)

D 9

DO

OR

CO

UR

TE

SY

SW

FR

ON

T L

H

D16

W–L

W–L

W–L

W–L

W–L

IGNITION KEYCYLINDER LIGHT

I22

(*3)(*4)

DO

OR

( *2)

( *2)

( *2)

( *1)

L ( *1)

C

STE

P L

IGH

TS

3

B

1

2

C11

COMBINATION METER

BA , C12

L–Y

DIO

DE

( STE

P L

IGH

T)

D27 1

2

1F4

AB

BC

AB AB

JUNCTIONCONNECTOR

BJ23 , J24A

L–Y

L–Y

L–Y

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2003 TOYOTA TUNDRA (EWD491U)

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B 8

2

1

2

1

BJ

B–W

B–W

W–B

W–B

DO

OR

CO

UR

TE

SY

SW

RE

AR

LH

UP

PE

R

D19

DO

OR

CO

UR

TE

SY

SW

RE

AR

LH

LO

WE

R

D18

B 4 B 4 B 4

B 4

1A2

1J8

2

1

2

1

1

2

OFF

ON

DO

OR

3

1

B 4

1H1

1B8 1B9

C

L–Y L–Y L–Y

L–Y

L–Y

L–Y

L–Y

W–B

W–B

B–W

W–B

B–W

A

IF

J 3JUNCTIONCONNECTOR

BK

2

1

2

1

B 9 B 9

BF25

BH14

C

1 2

B–W

B–LW–L

W–B

B–W

B–W

B–W

B–W

B–W

B–W

B–W

W–B

B–W

W–B

VA

NIT

Y L

IGH

T LH

V 6

VA

NIT

Y L

IGH

T R

HV

7

INTE

RIO

R L

IGH

TI2

6

PE

RS

ON

AL

LIG

HT

P 8

W–L

( *3)

( *3)

DIODE(POWER WINDOW SYSTEM)

D11

B–W( *2)

( *1)

( *2)

( *2)

( *2)

( *2)

( *2)

( *1)

(* 2)

( *2)

(* 2)

W–B

DO

OR

CO

UR

TES

Y S

WR

EA

R R

H U

PP

ER

D21

DO

OR

CO

UR

TES

Y S

WR

EA

R R

H L

OW

ER

D20

DO

OR

CO

UR

TES

YS

W F

RO

NT

RH

D17

(*2)

( *2)

( *2)

( *2)

W–B

* 2 : ACCESS CAB* 1 : STANDARD CAB

* 4 : W/O DOOR LOCK CONTROL* 3 : W/ DOOR LOCK CONTROL

1

B 4W–BW–B

B–W

2

B–W ( *4)

CJUNCTION CONNECTORJ 5

DOOR

BF24

BG25

C

B–W ( *2)

B–W ( *2)

B–W ( *2)

IC12

B

2

1

B

B

B

JUNCTIONCONNECTOR

J 4

JUNCTIONCONNECTOR

J21

B–W

(*3)

B

(*3)

B–W ( *3)

B ( *3)

B–W ( *4)

DIO

DE

( TV

IP)

D29

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2003 TOYOTA TUNDRA (EWD491U)

118

INTERIOR LIGHT

C11 (A), C12 (B) COMBINATION METER(A) 9–GROUND : Approx. 12 volts with ignition SW at ON or ST position(B) 5–GROUND : Always approx. 12 volts(B) 7–GROUND : Continuity with each door open(B)13–GROUND : Continuity with front LH door open

: PARTS LOCATION

Code See Page Code See Page Code See Page

C11 A 34 D17 37 (Standard Cab) J4 35

C12 B 34 D18 36 (Access Cab) J5 35

D9 34 D19 36 (Access Cab) J9 35

D11 34 D20 36 (Access Cab) J21 35

D1436 (Access Cab) D21 36 (Access Cab) J23 A 35

D1437 (Standard Cab) D27 34 J24 B 35

D1536 (Access Cab) D29 34

P836 (Access Cab)

D1537 (Standard Cab) I22 35

P837 (Standard Cab)

D1636 (Access Cab)

I2636 (Access Cab) S3 35

D1637 (Standard Cab)

I2637 (Standard Cab) V6 36 (Access Cab)

D17 36 (Access Cab) J3 35 V7 36 (Access Cab)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1A22 (*2)

Roof Wire and Driver Side J/B (Lower Finish Panel)1A26 (*1)

Roof Wire and Driver Side J/B (Lower Finish Panel)

1B22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1B26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1E22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1E26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1F22 (*2)

1F26 (*1)

1H22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1H26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2)

1J26 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IB244 Front Door LH Wire and Cowl Wire (Left Kick Panel)

IB444 Front Door LH Wire and Cowl Wire (Left Kick Panel)

IC1 44 Cowl Wire and Roof Wire (Left Side of Instrument Panel)

IF146 Front Door RH Wire and Cowl Wire (Right Kick Panel)

IF446 Front Door RH Wire and Cowl Wire (Right Kick Panel)

BE2 48 (Access Cab) Floor No.2 Wire and Cowl Wire (Center of Left Rocker Panel)

BF2 48 (Access Cab) Floor No.1 Wire and Cowl Wire (Center of Right Rocker Panel)

BG2 48 (Access Cab) Floor No.2 Wire and Rear Door No.1 Wire LH (Under the Left Quarter Panel)

BH1 48 (Access Cab) Floor No.1 Wire and Rear Door No.1 Wire RH (Under the Right Quarter Panel)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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2003 TOYOTA TUNDRA (EWD491U)

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: GROUND POINTS

Code See Page Ground Points Location

IF 44 Left Kick Panel

BJ 48 (Access Cab) Inside of Rear Door LH

BK 48 (Access Cab) Inside of Rear Door RH

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

B448 (Access Cab)

Roof WireB8 48 (Access Cab) Rear Door No.1 Wire LH

B450 (Standard Cab)

Roof WireB9 48 (Access Cab) Rear Door No.1 Wire RH

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2003 TOYOTA TUNDRA (EWD491U)

120

TURN SIGNAL AND HAZARD WARNING LIGHT

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

2

5ATURN

1J5

LH

RHTURN

1D7 1D10

1H12 1H131E11

BA BB

AC A

3

1

2

3

3

1

2

3

1D51E7 1D11

A7

B1 C12

B10I 2

EA IF

A A

4 1 6 5

1 3

17 8 3 2 7

2

G

G–B

G–R

TURN SIGNAL SW[COMB. SW]

C15

L–W

R–B

W–B

W–B

G–Y

G–B

G–B

G–Y

G–Y

G–B

G–Y

G–B

G–B

G–Y

FRO

NT

TUR

N S

IGN

AL

LIG

HT

LH

F 3

C11

TURN SIGNALINDICATOR LIGHT[COMB. METER]

BA , C12RE

AR

TU

RN

SIG

NA

LLI

GH

T LH

[RE

AR

CO

MB

. L

IGH

T L

H]

R 4

LH RH

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

JUN

CTI

ON

CO

NN

EC

TOR

J13

B1

II

INTEGRATIONCONTROL ANDPANEL

I24

R 5

RE

AR

TU

RN

SIG

NA

LLI

GH

T R

H[R

EA

R C

OM

B.

LIG

HT

RH

]

TURN SIGNALFLASHER

T 5

FRO

NT

TUR

N S

IGN

AL

LIG

HT

RH

F 4

+B IG ER EL

EHW LL LR GND

B10

BL

W–B

W–B

1

2

IA422

L–W

B

C13 C

I 1 BA

AA

AA

JUN

CTI

ON

CO

NN

EC

TOR

J 3

IE

W–B

W–B

JUNCTIONCONNECTOR

BJ23 , J24A

A

AA

JUNCTIONCONNECTOR

J18

BB23

W–B

JUN

CTI

ON

CO

NN

EC

TOR

BJ1

4A

, J1

5

1D91D6

TO T

OW

ING

CO

NV

ER

TER

G–B

G–Y

20AHAZ

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T5 TURN SIGNAL FLASHER4–GROUND : Always approx. 12 volts1–GROUND : Approx. 12 volts with ignition SW at ON or ST position7–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

C11 A 34 I24 35 J18 33 (5VZ–FE)

C12 B 34 J3 35 J23 A 35

C13 C 34 J13 35 J24 B 35

C15 34J14 A

36 (Access Cab)R4

36 (Access Cab)

F330 (2UZ–FE)

J14 A37 (Standard Cab)

R437 (Standard Cab)

F332 (5VZ–FE)

J15 B36 (Access Cab)

R536 (Access Cab)

F430 (2UZ–FE)

J15 B37 (Standard Cab)

R537 (Standard Cab)

F432 (5VZ–FE) J18 31 (2UZ–FE) T5 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1D22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1D26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1E22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1E26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1H22 (*2)

1H26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J26 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA4 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

BB248 (Access Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)BB250 (Standard Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)

: GROUND POINTS

Code See Page Ground Points Location

EA40 (2UZ–FE)

Front Left FenderEA42 (5VZ–FE)

Front Left Fender

IE44 Left Kick Panel

IF44 Left Kick Panel

II 44 Right Kick Panel

BL48 (Access Cab)

Surrounding of the Front of the Fuel TankBL50 (Standard Cab)

Surrounding of the Front of the Fuel Tank

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I146 Cowl Wire B10

48 (Access Cab)Frame Wire

I246 Cowl Wire B10

50 (Standard Cab)Frame Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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STOP LIGHT

15ASTOP

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1F2

G–Y

G–W

1D4

1H5

BC

3

4

3

4

AA

BC

B10

A

IF

J 3JUNCTIONCONNECTOR

2

1

1A2

1J8

IC11

1D3

W–B

W–B

W–B

W–B

G–W

G–W

G–W

G–W

G–W

W–B

STO

P L

IGH

T LH

[RE

AR

CO

MB

. L

IGH

T LH

]

R 4

STO

P L

IGH

T R

H[R

EA

R C

OM

B.

LIG

HT

RH

]

R 5

J14

JUNCTIONCONNECTOR

BA , J15

HIG

H M

OU

NTE

DS

TOP

LIG

HT

H10

JUNCTIONCONNECTOR

J10

2

1

STOP LIGHTSW

S 4

BL

C

C

G–W

W–B

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S4 STOP LIGHT SW2–1 : Closed with brake pedal depressed

: PARTS LOCATION

Code See Page Code See Page Code See Page

H1036 (Access Cab) J14 A 37 (Standard Cab)

R536 (Access Cab)

H1037 (Standard Cab)

J15 B36 (Access Cab)

R537 (Standard Cab)

J3 35J15 B

37 (Standard Cab) S4 35

J10 35R4

36 (Access Cab)

J14 A 36 (Access Cab)R4

37 (Standard Cab)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1A22 (*2)

Roof Wire and Driver Side J/B (Lower Finish Panel)1A26 (*1)

Roof Wire and Driver Side J/B (Lower Finish Panel)

1D22 (*2)

1D26 (*1)

1F22 (*2)

1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1H22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1H26 (*1)

1J22 (*2)

1J26 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IC1 44 Cowl Wire and Roof Wire (Left Side of Instrument Panel)

: GROUND POINTS

Code See Page Ground Points Location

IF 44 Left Kick Panel

BL48 (Access Cab)

Surrounding of the Front of the Fuel TankBL50 (Standard Cab)

Surrounding of the Front of the Fuel Tank

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

B10 48 (Access Cab) Frame Wire B10 50 (Standard Cab) Frame Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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LIGHT AUTO TURN OFF (w/ DAYTIME RUNNING LIGHT)

5AECU IG

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

15ATAIL

OFF

TAIL

HEAD

E

E

1C6

1K5

1

3 2

2 2

2

5

A

IF

J 3JUNCTIONCONNECTOR

BE25

BG24

1

14 6

R–B

L

E

13 14

R–B

R

H–L

P R

ELA

Y

BATTERY

B–L

LIG

HT

CO

NT

RO

L S

W[C

OM

B.

SW

]

C15

16

W–B

DO

OR

CO

UR

TES

YS

W F

RO

NT

LH

D16

L

L

L

L

JUN

CTI

ON

CO

NN

EC

TOR

J 4

R

( *3)

( *4)

( *4)

(* 4)

1H7

G–Y

* 4 : ACCESS CAB* 3 : STANDARD CAB

9

* 2 : EXCEPT TOWING PACKAGE* 1 : TOWING PACKAGE

A

II

J13JUNCTIONCONNECTOR

I 2

W–B

W–B

1J8

8

W–B

A

30APOWER

3 2

1

INTEGRATION RELAY

F

F

G–Y

( *5)

G–Y

( *5)

( *6)

AC

BA

R–B

JUN

CTI

ON

CO

NN

EC

TOR

BJ2

1A

, J2

2

JUN

CTI

ON

CO

NN

EC

TOR

J 7

* 5 : W/ DOOR LOCK CONTROL* 6 : W/O DOOR LOCK CONTROL

R–B

B ( *2)

( *1)

W–B

1O4 1N3 1N4

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With the ignition SW turned on, the current flows to TERMINAL 9 of the integration relay through ECU IG fuse.Voltage is applied at all times to TERMINAL 6 of the integration relay through the TAIL fuse, and through the H–LP relay coilside.

1. NORMAL LIGHTING OPERATION<Turn taillight on>With the light control SW turned to TAIL position, a signal is input into the integration relay. Due to this signal, the currentflowing to TERMINAL 6 of the relay flows to TERMINAL 14 of the light control SW to TERMINAL 16 to GROUND, andtaillights to turn on.

<Turn headlight on>With the light control SW turned to HEAD position, a signal is input into the integration relay. Due to this signal, the currentflowing to the relay flows to TERMINAL 13 of the light control SW to TERMINAL 16 to GROUND in the headlight circuit, andcauses taillight and H–LP relay to turn the lights on. The taillight circuit is same as above.

2. LIGHT AUTO TURN OFF OPERATIONWith light on and ignition SW turned off (Input signal goes to TERMINAL 9 of the relay), when the driver’s door is opened(Input signal goes to TERMINAL 14 of the relay), the relay operates and the current is cut off which flows from TERMINAL 6and through the H–LP relay coil side of the relay to taillight circuit and headlight circuit.As a result, all lights are turned off automatically.

H–LP RELAY5–3 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position

Closed with the engine running and the parking brake lever released

C15 LIGHT CONTROL SW [COMB. SW]13–16 : Closed with light control SW at HEAD position14–16 : Closed with light control SW at TAIL or HEAD position

D16 DOOR COURTESY SW FRONT LH1–GROUND : Continuity with the front LH door open

INTEGRATION RELAY9–GROUND : Approx. 12 volts with the ignition SW at ON position

14–GROUND : Continuity with the front LH door open3, 6–GROUND : Always approx. 12 volts

8–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

C15 34 J3 35 J13 35

D1636 (Access Cab) J4 35 J21 A 35

D1637 (Standard Cab) J7 35 J22 B 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1C

1H 26 (*1) Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J

( ) ( )

1K 26 (*1) Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1N27 (*1) Cowl Wire and Driver Side J/B (Lower Finish Panel)

1O27 (*1) Cowl Wire and Driver Side J/B (Lower Finish Panel)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SYSTEM OUTLINE

SERVICE HINTS

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LIGHT AUTO TURN OFF (w/ DAYTIME RUNNING LIGHT)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

BE2 48 (Access Cab) Floor No.2 Wire and Cowl Wire (Center of Left Rocker Panel)

BG2 48 (Access Cab) Floor No.2 Wire and Rear Door No.1 Wire LH (Under the Left Quarter Panel)

: GROUND POINTS

Code See Page Ground Points Location

IF 44 Left Kick Panel

II 44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I2 46 Cowl Wire

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MEMO

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LIGHT AUTO TURN OFF (w/o DAYTIME RUNNING LIGHT)

5AECU IG

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

15ATAIL

OFF

TAIL

HEAD

E

E

1C6

1K5

1

3 2

2 2

2

5

A

IF

J 3JUNCTIONCONNECTOR

BE25

BG24

1

14 6

R–B L

E

13 14

R–B R

H–L

P R

ELA

Y

BATTERY

B–L

LIG

HT

CO

NT

RO

L S

W[C

OM

B.

SW

]

C15

16

W–B

DO

OR

CO

UR

TES

YS

W F

RO

NT

LH

D16

L

L

L

L

JUN

CTI

ON

CO

NN

EC

TOR

J 4

R

( *3)

( *4)

( *4)

(* 4)

1H7

G–Y

* 4 : ACCESS CAB* 3 : STANDARD CAB

9

INTEGRATION RELAY

* 2 : EXCEPT TOWING PACKAGE* 1 : TOWING PACKAGE

A

II

J13JUNCTIONCONNECTOR

I 2

W–B

W–B

1J8

8

W–B

W–B

A

30APOWER

3 2

1

1L131L51L6

F

F

JUN

CTI

ON

CO

NN

EC

TOR

J 7

G–Y

( *5)

G–Y

( *5)

( *6) AC

BA JUN

CTI

ON

CO

NN

EC

TOR

BJ2

1A

, J2

2

R–B

( *1) B ( *2)

* 5 : W/ DOOR LOCK CONTROL* 6 : W/O DOOR LOCK CONTROL

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With the ignition SW turned on, the current flows to TERMINAL 9 of the integration relay through ECU IG fuse.Voltage is applied at all times to TERMINAL 6 of the integration relay through the TAIL fuse, and through the H–LP relay coilside.

1. NORMAL LIGHTING OPERATION<Turn taillight on>With the light control SW turned to TAIL position, a signal is input into the integration relay. Due to this signal, the currentflowing to TERMINAL 6 of the relay flows to TERMINAL 14 of the light control SW to TERMINAL 16 to GROUND, andtaillights to turn on.

<Turn headlight on>With the light control SW turned to HEAD position, a signal is input into the integration relay. Due to this signal, the currentflowing to the relay flows to TERMINAL 13 of the light control SW to TERMINAL 16 to GROUND in the headlight circuit, andcauses taillight and H–LP relay to turn the lights on. The taillight circuit is same as above.

2. LIGHT AUTO TURN OFF OPERATIONWith light on and ignition SW turned off (Input signal goes to TERMINAL 9 of the relay), when the driver’s door is opened(Input signal goes to TERMINAL 14 of the relay), the relay operates and the current is cut off which flows from TERMINAL 6and through the H–LP relay coil side of the relay to taillight circuit and headlight circuit.As a result, all lights are turned off automatically.

H–LP RELAY5–3 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position

C15 LIGHT CONTROL SW [COMB. SW]13–16 : Closed with light control SW at HEAD position14–16 : Closed with light control SW at TAIL or HEAD position

D16 DOOR COURTESY SW FRONT LH1–GROUND : Continuity with the front LH door open

INTEGRATION RELAY9–GROUND : Approx. 12 volts with the ignition SW at ON position

14–GROUND : Continuity with the front LH door open3, 6–GROUND : Always approx. 12 volts

8–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

C15 34 J3 35 J13 35

D1636 (Access Cab) J4 35 J21 A 35

D1637 (Standard Cab) J7 35 J22 B 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1C

1H 22 (*2) Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J

( ) ( )

1K 22 (*2) Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1L 23 (*2) Cowl Wire and Driver Side J/B (Lower Finish Panel)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SYSTEM OUTLINE

SERVICE HINTS

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2003 TOYOTA TUNDRA (EWD491U)

130

LIGHT AUTO TURN OFF (w/o DAYTIME RUNNING LIGHT)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

BE2 48 (Access Cab) Floor No.2 Wire and Cowl Wire (Center of Left Rocker Panel)

BG2 48 (Access Cab) Floor No.2 Wire and Rear Door No.1 Wire LH (Under the Left Quarter Panel)

: GROUND POINTS

Code See Page Ground Points Location

IF 44 Left Kick Panel

II 44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I2 46 Cowl Wire

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2003 TOYOTA TUNDRA (EWD491U)

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MEMO

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TRAILER TOWING

2

5 1

3 2

2

2 2

TOW

TA

ILR

ELA

Y

30A

TO

W T

AIL

2

IA412 IA420

BB24 AC

BA JUN

CTI

ON

CO

NN

EC

TOR

BJ2

1A

, J2

2

OFF

TAIL

HEAD

14

16

IF

A

R–B

G R–B

R–B

W–B

BB21

1 3

IA41

30A

TO

W B

RK

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

2

2

1

2

15A

ST

OP

1F2

1G4

E

E

5

G

ST

OP

LIG

HT

SW

S 4

C

CC

6

4

G–Y

G–W

G–W

G

G–W

INTE

GR

ATI

ON

RE

LAY

C

C

BR

( *1)

BR

( *1)

L

( *1)

( *1)L

G

IH

OPTIONCONNECTOR

O 5

JUNCTIONCONNECTOR

J 8

BK22BK14

4

15A

TA

IL

EE G

L(*1)

G(*1)

JUNCTIONCONNECTOR

J10

JUNCTIONCONNECTOR

J10

JUNCTIONCONNECTOR

J12

LIGHT CONTROL SW[COMB. SW]

C15

JUNCTIONCONNECTOR

J 3

11

B–W

B–R

B–R

B–W

2 2

G( *

1)

L

B

BRK GND STOP

+B TAIL

( *1)

( *1)

( *1)

( *1)

(* 1)

( *1)

BR

( *1)

( *1)

* 2 : EXCEPT TOWING PACKAGE* 1 : TOWING PACKAGE

* 4 : W/O DOOR LOCK CONTROL* 3 : W/ DOOR LOCK CONTROL

1E5

C

C

B–Y ( *1)

JUN

CTI

ON

CO

NN

EC

TO

R

J 1

B–Y

( *1)

2

15

23

2

C

C

W–B

( *1)

JUN

CTI

ON

CO

NN

EC

TOR

J 2

W–B

( *1)

22

A

A

JUN

CTI

ON

CO

NN

EC

TOR

J18

W–B

( *1)

EA

SU

B B

ATT

RE

LAY

30A

SU

B B

ATT

2

2

B ( *1)

IA44

BK21

BB22

B

1

L–W

( *1)

L

(*1)

G–W

B

B

W–B

( *1)

( *1)

( *1)

( *1)

( *1)

(* 1)

BR

( *2)

BR(*2)

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10AGAUGE

1F7

3 2

5 1

1F9

4 2

9 1

IA421

30A

TO

WIN

G

2

BB25 BB26

BK13 BK11

B4 (*2)A5 (*1)

B3A3

A6 (*1)A2B1 (*2)

A1B2

A7

BL

BK12

A4

IE

6

3

1D6 1D9

1D7 1D10

G–B

G–Y

G–B

G–Y

8

1J5

20A

HA

Z

2

IA422

BK23

BB17

2

3

IE126

2

1 3

15AACC

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1G11

IE12

C

C

EA

1 4

E A

3 2

5A T

UR

N

L(*1)

G(*1)

B

G–W

JUN

CTI

ON

CO

NN

EC

TOR

BJ2

3A

, J2

4

T 6 ,

TRAILERSOCKET

A B

JUN

CTI

ON

CO

NN

EC

TO

R

J 9

BACK–UP LIGHT SW[PARK/NEUTRAL POSITION SW]

P 1

DIODE(A/T)

D 8

TOWING CONVERTERT 9

TUR

N S

IGN

AL

FLA

SH

ER

T 5

BA

CK

–UP

LIG

HT

RE

LAY

B 3

JUN

CTI

ON

CO

NN

EC

TOR

J12

JUNCTIONCONNECTOR

J 8

LTIN RTIN +B

B/UP STTL STTR

STIN LTOT RTOT GND

BRK TAIL BATT GND

G–W

R–B

R–B

B–Y

B–Y

B–Y GR

GR

GR

R–B

L–W

L–W

B–Y

B–Y

R BR

R–B

L–B

R–B

R BRL–

B

R–B

R–B

Y R BR

W–B

L

G( *

1)

B WW

–B

W–B

11

2 2

IG +B

LL LR

(*3)

( *3)

( *4)

B10

R–B

Y ( *1)

( *1)

( *1)

( *1)Y G( *2)

( *2)

( *1)

AA

BA BA

W–BW–B

( *1)

( *1)

( *1)

( *1)

( *1)

( *1)

( *1)

( *1)

( *1)

(* 1)

(*1)

(*1)

(*1)

(*1) (*1)

( *1)

BR(*2)

BR

( *2)

B10

W

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TRAILER TOWING

T9 TOWING CONVERTER1–GROUND : Always approx. 12 volts6–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

B3 34 J10 35 P1 33 (5VZ–FE)

C15 34 J12 35 S4 35

D8 34J18

31 (2UZ–FE) T5 35

J131 (2UZ–FE)

J1833 (5VZ–FE)

A36 (Access Cab)

J133 (5VZ–FE) J21 A 35

T6

A37 (Standard Cab)

J231 (2UZ–FE) J22 B 35

T6

B36 (Access Cab)

J233 (5VZ–FE) J23 A 35

B37 (Standard Cab)

J3 35 J24 B 35 T9 35

J8 35 O5 35

J9 35 P1 31 (2UZ–FE)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1D22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1D26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1E22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1E26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1F22 (*2)

1F26 (*1)

1G22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1G26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2)

1J26 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA4 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IE1 46 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

BB148 (Access Cab)

BB150 (Standard Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)

BB248 (Access Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)

BB250 (Standard Cab)

BK148 (Access Cab)

BK150 (Standard Cab)

Frame Wire and Frame No 3 Wire (Near the License Plate Light)

BK248 (Access Cab)

Frame Wire and Frame No.3 Wire (Near the License Plate Light)

BK250 (Standard Cab)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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135

: GROUND POINTS

Code See Page Ground Points Location

EA40 (2UZ–FE)

Front Left FenderEA42 (5VZ–FE)

Front Left Fender

IE44 Left Kick Panel

IF44 Left Kick Panel

IH 44 Right Kick Panel

BL48 (Access Cab)

Surrounding of the Front of the Fuel TankBL50 (Standard Cab)

Surrounding of the Front of the Fuel Tank

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

B10 48 (Access Cab) Frame Wire B10 50 (Standard Cab) Frame Wire

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CARGO LIGHT

5ACARGOLP

A12

A9B1

1H10

11

I24

INTEGRATION CONTROLAND PANEL

BA , I25

1D2

1H

2

A

IF

J 3JUNCTIONCONNECTOR

A

II

J13JUNCTIONCONNECTOR

2

3

1A2

1J8

W–B

R–B

W–B

W–B

W–B

R–B

W–R

R–B

5

AA

CARGO LIGHT[HIGH MOUNTED STOP LIGHT]

H10

GND L

+B

1A7

10AGAUGE

C3 A9

1F5

IE23IE36

IE225IE34

C13 C2B8

IE19 IE117(A/T)(M/T)

2 3

1

P–L

P–L

G–B

R–L

P–L

P–L

G–B

R–L

IE17IE12

1F8

SP

EE

DO

ME

TE

R

C

BR

IH

C

G–O

B–Y

B–Y

B–Y

B–Y

BR VEHICLE SPEED SENSOR

(COMBINATION METER)

V 2

( *1)

( *1)

( *2)

( *2)

( *2)

( *2)

( *1)

( *1)

(*1)(*2)

J 8JUNCTIONCONNECTOR

D

D

J 9JUNCTIONCONNECTOR

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

* 2 : 5VZ–FE* 1 : 2UZ–FE

C11

CO

MB

INA

TIO

N M

ET

ER

BA

, C

12

* 3 : W/ DAYTIME RUNNING LIGHT* 4 : W/O DAYTIME RUNNING LIGHT

INTEGRATIONRELAY

C,

C13

G–O

1N1L

1111

1L1N

105 (*3)

(*4)

(*4)(*3)

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I24 (A), I25 (B) INTEGRATION CONTROL AND PANEL(B) 1–GROUND : Always continuity(A)12–GROUND : Always. approx. 12 volts

: PARTS LOCATION

Code See Page Code See Page Code See Page

C11 A 34 I24 A 35 J13 35

C12 B 34 I25 B 35V2

31 (2UZ–FE)

C13 C 34 J3 35V2

33 (5VZ–FE)

H1036 (Access Cab) J8 35

H1037 (Standard Cab) J9 35

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1A22 (*2)

Roof Wire and Driver Side J/B (Lower Finish Panel)1A26 (*1)

Roof Wire and Driver Side J/B (Lower Finish Panel)

1D22 (*2)

1D26 (*1)

1F22 (*2)

1F26 (*1)

1H22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1H26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2)

1J26 (*1)

1L 23 (*2)

1N 27 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IE1

IE2 46 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

IE3

g ( g )

: GROUND POINTS

Code See Page Ground Points Location

IF 44 Left Kick Panel

IH44 Right Kick Panel

II44 Right Kick Panel

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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INTEGRATION CONTROL AND PANEL

10AA/C

2

10AGAUGE

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1F5

B12

W–L

W–L

E

E

M

B4 A15 A13

5

E

2 1

B–Y

B–Y

B–Y

B–W B

AIR

INLE

T C

ON

TRO

LS

ER

VO

MO

TOR

A15

JUNCTIONCONNECTOR

J 8

2

BFRS RECIG

IE216IE38

A/C

MA

GN

ET

ICC

LUT

CH

A8

IA48 IA417

A6 B11

2

1

A/C

DU

AL

PR

ES

SU

RE

SW

A 1

L–R

W–L

(*3)(*4)

O

L–W

O

L–W

MGC IG+ AC+2

IA52

+

FRS REC

1

I24

INTEGRATION CONTROL AND PANEL

BA , I25

B1 (*2)A3 (*1)

4 IE1

(*1)

W–L

( *2)

L–R

( *1)

( *2)

1F9

B–Y

A9

B–Y

C11

CO

MB

INA

TIO

N M

ETE

R

BA

, C

12

4 A

(*1)

BR–Y

5 A

21 20 7 4

(*1)

Y–B

( *1)

Y–B ( *1)

BR

–Y

( *1)

G–Y

( *1)P

2–4H–L

IND1IND2

4WD CONTROL ECUF 7

IND1 IND2 H–L 2–4

8 A11 B B3 B2

B10 D1

D,

C14

E

B–Y

B9

7

6

DE

FRO

STE

R S

W[B

LOW

ER

SW

]

B 6

B–L

L

A/C MAGNETICCLUTCH

AA 2 , A 3B

( *2)

( *2)

( *2)

( *2)

4LO

4HI

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2

1

A20 A10 A17B14

A/C

TH

ER

MIS

TO

RA

13

B–L

W–G

8

G–R

IN E ACC1 B1

A18 A19

A3B33

A9 (*2)B2

L–B

L–Y

E 3

ENGINE CONTROLMODULE

BA , E 4

AIND(*1)ACT(*2)

A/CM(*1)AC1(*2)

10ADOME

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

2

1E6

1F4

A3 A1 B5

15AACC

1G10

B13 A12

2

IH

A

II

J13

JUN

CT

ION

CO

NN

EC

TO

R

A16 B1 B7 B8 A7 A9

I 2

GR

L–Y

L–Y

L–Y

W–BR

P 4

PA

SS

EN

GE

R A

IRB

AG

MA

NU

AL

ON

–OF

F S

W

PIND GND1 B ACC +B

BKLD GND IL–1 ILL– ILL+ L

B–R

W–B

R–B

G

W–G

G–W

W–B W–B

W–BW–BA

G

W–G

G–W

* 2 : 5VZ–FE* 1 : 2UZ–FE

* 4 : 5VZ–FE M/T* 3 : 5VZ–FE A/T

ACC EHW

1

I24

INTEGRATION CONTROL AND PANEL

BA , I25

B3

2

1

* 6 : W/O DAYTIME RUNNING LIGHT* 5 : W/ DAYTIME RUNNING LIGHT

BUCKLESW

1

3

2

8

RBE+

CENTERAIRBAGSENSORASSEMBLY

C 6

SE

AT

BE

LT W

AR

NIN

G O

CC

UP

AN

TD

ETE

CT

ION

SE

NS

OR

AN

D B

UC

KLE

SW

RH

S 5

B–L

B31 (*1)

A21

L

A/CS

(*1)

RADIO ANDPLAYER

R 2 B

( *2)

( *2)

GR

TURN SIGNALFLASHER

T 5

AB

BC

JUN

CTI

ON

CO

NN

EC

TOR

BJ2

3A

, J2

4

W–R

ACLD(*1)ACT(*2)

ACMG(*1)AC1(*2)

A/CS

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INTEGRATION CONTROL AND PANEL

IF

J 3JUNCTIONCONNECTOR

4

1

STE

ER

ING

SW

[CO

MB

. S

W]

C16

RH

EO

STA

TR

3

E

E

E E

E

G GGG

JUNCTION CONNECTORJ10

BR

W–G

W–G

W–B

1

2 3

E

E

EG

W–G

G–W

W–B

JUNCTIONCONNECTOR

J 5

E

G

G–Y

DIODE(IDLE–UP)

D10

ELS1 2

( *1)

(* 1)

W–B

G–W

G

5ACARGOLP

15ATAIL

HEAD

TAIL

OFF

1G41H10

1H2 1A7

1D2

11 4

6 5

2

3

R–B

14

16

W–R

W–B

R–B

R–B

CA

RG

O L

IGH

T[H

IGH

MO

UN

TE

D S

TOP

LIG

HT

]

H10

W–B

LIG

HT

CO

NTR

OL

SW

[CO

MB

. S

W]

C15

W–B

G

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

R–B

B15

B14

C12

ME

TER

ILL

UM

INA

TIO

N[C

OM

B.

ME

TER

]

B

AC

BA

R–B

E

EDEC

BR

( *1)

BR

( *2)

INTEGRATION RELAY

JUN

CTI

ON

CO

NN

EC

TOR

BJ2

1A

, J2

2

R–B

1J8

1A2

W–B

AA

IE15IE117

(*1)(*2)

1L1N

134 (*5)

(*6)1L1N

105 (*5)

(*6)

A12

ENGINE CONTROLMODULE

E 3 A

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I 1

2

1

1

2

1

2

GLO

VE

BO

XLI

GH

T

G 3

AS

HTR

AY

ILLU

MIN

AT

ION

A18

CIG

AR

ETT

E L

IGH

TER

ILLU

MIN

AT

ION

C 8

R 1

RA

DIO

AN

D P

LAY

ER

BA

, R

2

A5

B10

ID24 ID23

ID25 ID26

EE E

EE

G G G

G

G

G

JUNCTION CONNECTORJ12

W–G

W–G

W–G

W–G

W–B

G–W

* 1 : 2UZ–FE

W–B

G–W

G

* 2 : 5VZ–FE* 5 : W/ DAYTIME RUNNING LIGHT

3

1

MIR

RO

R H

EA

TER

SW

M 4

E

GW

–G

E E E

JUNCTIONCONNECTOR

J 5

* 6 : W/O DAYTIME RUNNING LIGHT

IE

BA

BA

JUNCTIONCONNECTOR

BJ23 , J24A

W–B

W–B

W–B

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INTEGRATION CONTROL AND PANEL

The integration control panel is composed by design components such as the cluster, resistor, heater control panel, and SW.The integration control panel controls systems such as the air conditioning, cargo light, 4WD (2UZ–FE) and hazard warninglight, clock, and the SRS.

I24 (A), I25 (B) INTEGRATION CONTROL AND PANEL(B)12–GROUND : Approx. 12 volts with ignition SW on and blower SW on(B) 4–GROUND : Approx. 12 volts with ignition SW at ON or ST position(B) 5–GROUND : Always approx. 12 volts(B)13–GROUND : Approx. 12 volts with ignition SW at ACC or ON position(B) 1–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

A130 (2UZ–FE) C16 34 J12 35

A132 (5VZ–FE) D10 34 J13 35

A2 B 32 (5VZ–FE) E3 A 34 J21 A 35

A3 A 30 (2UZ–FE) E4 B 34 J22 B 35

A13 34 F7 35 J23 A 35

A15 34 G3 35 J24 B 35

A18 34H10

36 (Access Cab) M4 35

B6 34H10

37 (Standard Cab) P4 35

C6 34 I24 A 35 R1 A 35

C8 34 I25 B 35 R2 B 35

C11 A 34 J3 35 R3 35

C12 B 34 J5 35S5

36 (Access Cab)

C14 D 34 J8 35S5

37 (Standard Cab)

C15 34 J10 35 T5 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1A22 (*2)

Roof Wire and Driver Side J/B (Lower Finish Panel)1A26 (*1)

Roof Wire and Driver Side J/B (Lower Finish Panel)

1D22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1D26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1E22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1E26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1F22 (*2)

1F26 (*1)

1G22 (*2)

1G26 (*1)

1H22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1H26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2)

1J26 (*1)

1L 23 (*2)

1N 27 (*1)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SYSTEM OUTLINE

SERVICE HINTS

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2003 TOYOTA TUNDRA (EWD491U)

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: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA444 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IA544 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

ID2 46 Cigarette Lighter Wire and Cowl Wire (Instrument Panel Brace LH)

IE1

IE2 46 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

IE3

g ( g )

: GROUND POINTS

Code See Page Ground Points Location

EC 40 (2UZ–FE) Rear Bank of Left Cylinder Head

ED 42 (5VZ–FE) Intake Manifold Left

IE44 Left Kick Panel

IF44 Left Kick Panel

IH44 Right Kick Panel

II44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I1 46 Cowl Wire I2 46 Cowl Wire

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ELECTRONICALLY CONTROLLED TRANSMISSION AND A/T INDICATOR

2

15AEFINO. 1

2

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

2

1 5

2 3

2

B–R

2 2

C

W–L

B–Y

B–R

B–R

EA

W B Y

4 8 7

W–L

P–L

G–R

D10D11 D15 35 DD

1D4

B19 C12A3

G–W B

B

1

W–B

5ASTA

1F6

THW

2

1

2

1

1F2

D32 E28 E19

I 3I 3

A/T

OIL

TE

MP

. S

EN

SO

RA

4

EN

GIN

E C

OO

LAN

TTE

MP

. S

EN

SO

R

E 2

GR–L

B–W

B–W

B–W

B–W

B–W B–W

1

ELE

CTR

ON

ICA

LLY

CO

NTR

OLL

ED

TR

AN

SM

ISS

ION

SO

LEN

OID

E 1

NO

. 1

NO

. 2

NO

. 3

EFI

RE

LAY

E2THOC

NCO–SLS2S1

STSWSTPBATT

V

6

9

N

P

PA

RK

/NE

UT

RA

LP

OS

ITIO

N S

W

P 1

W–B

G–Y

E 3

ENGINE CONTROL MODULE

BA , E 4 C, E 5 D, E 6

12

C

1D

JUN

CTI

ON

CO

NN

EC

TOR

J10

NCO+

P

27 D

B–Y

B–Y

2

1I 5

W–L

W–L

13 D

SLT+

B–R

G–W

SLT–

2 6

SLT

B

B

J 1

JUN

CT

ION

CO

NN

EC

TOR

W–L

B–R

A8

IA414

MREL

IA46IA415

W–B

1

2

ST

OP

LIG

HT

SW

S 4

A2

+B2+B

1 A

O G

O/D

DIR

EC

T C

LUTC

HS

PE

ED

SE

NS

OR

O 1

E, E 7

W–L

G–W

G–W

E17

P

STA

15ASTOP

P

IE115

E16

W–B

NSW

W–B

D9

STAR

I 3

TO S

TAR

TER

RE

LAY

( *2)

TO T

VIP

EC

U( *

1)P

A

A

A

JUN

CTI

ON

CO

NN

EC

TOR

J20

P

A

A

JUNCTIONCONNECTOR

J18

W–B

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2003 TOYOTA TUNDRA (EWD491U)

145

(2UZ–FE)

B

ENGINE CONTROL MODULE

E 3

6

E02

E

L–O

B–W

E

6 5

21 E18

W–R

B11 B9 B8

J 9

3

JUNCTIONCONNECTOR

E03

7 C

EB

VTA

GR(*2)

B–Y

GR(*1)B

–Y

D 8DIODE (A/T)

ME01SP2+SP2–

2

B

RVC

17

34 D D26 C4

1

2

Y–R

W–B

V 3

VE

HIC

LE S

PE

ED

SE

NS

OR

( ELE

CT

RO

NIC

ALL

Y C

ON

TRO

LLE

D T

RA

NS

MIS

SIO

N)

DD

1

W–B

15AACC

1G11 9 1F

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

10AGAUGE

2

J 8JUNCTIONCONNECTOR

AA

EE

8

1F

1

R

W–B

W–B

W–B

L–O

3

L

G–OLGR–B

G–B

B–Y

L–B

B–Y

R–B

L

LG

G–O

E01

7 E

5 1F

B–Y

A , E 4 C, E 5 D, E 6

O 4

O/D

MA

IN S

W

B–Y

L SPD

* 1 : W/ DOOR LOCK CONTROL* 2 : W/O DOOR LOCK CONTROL

31 E B10

W–R

W–R

D

4

P–L

C1

BR

E1

VTA2

5AIGN

1F11

A9

IGSW

B–O

B–O

B

B JUN

CT

ION

CO

NN

EC

TO

R

J 5

G–OG–O

ODMS

16 A

B25

OILW

Y–R

3

TH

RO

TTLE

PO

SIT

ION

SE

NS

OR

T 2

E, E 7

EC

GR(*1)

W–B

J 9JUNCTIONCONNECTOR

ODLP

7 B

C

2

3

M+

R

2 C

1

W

M–

M– M+

GE01

17

BR

C

I 3

( SH

IELD

ED

)

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2003 TOYOTA TUNDRA (EWD491U)

146

ELECTRONICALLY CONTROLLED TRANSMISSION AND A/T INDICATOR

IE1

26

L

LL 2L DL NL RL PL

8 4 7 5 2 1

3

A9 C3

IE120 IE1 6 IE110 IE12 19 IE1IE111

D3

SP

EE

DO

ME

TER

O/D

OFF

CC

RB

B

B

B

B

A

A

D4D5D6D7D8D9L–

Y

R–B

LG–B

W–R

LG

LLG

L–BL–B

LGB–Y

R–B

L

LG

G–O

A/T INDICATOR SW[PARK/NEUTRAL POSITION SW]

P 1

BA

B8 A7

B–Y

IH

L–O

BR

BR

L 2 D N R P

C

C

J 8

JUN

CT

ION

CO

NN

EC

TO

R

C13 C2

IE19 IE117

P–L

R–L

2 3

P–L

R–L

W–B

L–Y

C11

CO

MB

INA

TIO

N M

ETE

R

BA

, C

12C

, C

13D

, C

14

L

JUN

CT

ION

CO

NN

EC

TO

R

J12

JUN

CT

ION

CO

NN

EC

TO

R

J 8

LG L

W–R

LG–B

R–B

W–R

R–B

C

CJU

NC

TIO

NC

ON

NE

CT

OR

J11

LG–B

W–R B

R–B

JUN

CT

ION

CO

NN

EC

TO

R

J12

1

VE

HIC

LE S

PE

ED

SE

NS

OR

( CO

MB

INA

TIO

N M

ET

ER

)

V 2

IE17

B–Y

B–Y

B–Y

Y–R

D10

A/T

OIL

TE

MP

.

CW

–B

Y–R

G–O

IE

I 2 BA

AAW–B W–B W–B

JUNCTIONCONNECTOR

BJ23 , J24A

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2003 TOYOTA TUNDRA (EWD491U)

147

(2UZ–FE)

The electronically controlled transmission electrically controls the, throttle pressure, lock–up pressure, and accumulatorpressure etc. through the solenoid valve.The electronically controlled transmission is a system which precisely controls the gear shift timing and lock–up timing inresponse to the vehicle’s driving conditions and the engine condition detected by various sensors. It makes smooth drivingpossible by shift selection of the gear which is the most appropriate to the driving conditions at that time, and by preventingdowning, squat and gear shift shock when starting off.

1. GEAR SHIFT OPERATIONWhen driving, the engine warm up condition is input as a control signal from the engine coolant temp. sensor to TERMINALTHW of the engine control module, and the vehicle speed is input to TERMINAL SP2+ of the engine control module from thevehicle speed sensor. At the same time, the throttle valve opening signal from the throttle position sensor is input toTERMINALS VTA, VTA2 of the engine control module as a throttle angle signal. Based on these signals, the engine controlmodule selects the best shift position for the driving conditions and sends current to the electronically controlled transmissionsolenoid.

2. LOCK–UP OPERATIONWhen the engine control module decides based on each signal that the lock–up condition has been met, the current flowsfrom the engine control module TERMINAL SL to TERMINAL 7 of the electronically controlled transmission solenoid toGROUND.

3. STOP LIGHT SW CIRCUITIf the brake pedal is depressed (Stop light SW on) when driving in lock–up position, a signal is input to TERMINAL STP ofthe engine control module. As a result, the engine control module cuts the current to the solenoid to release the lock–up.

4. OVERDRIVE CIRCUIT∗ O/D main SW on

When the O/D main SW is switched to ON position, a signal is input to TERMINAL ODMS of the engine control module,and enables shift change to the overdrive range, through the control of the engine control module.

∗ O/D main SW offWhen the O/D main SW is switched to OFF position, a signal is input to TERMINAL ODMS of the engine control module,and prohibits shift change to the overdrive range through the control of the engine control module. When in the overdriverange already, shift down is made.

SYSTEM OUTLINE

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2003 TOYOTA TUNDRA (EWD491U)

148

ELECTRONICALLY CONTROLLED TRANSMISSION AND A/T INDICATOR

E1 ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID4, 7, 8-GROUND : Approx. 13 Ω

O4 O/D MAIN SW3–1 : Open with O/D main SW at ON position

Closed with O/D main SW at OFF position

S4 STOP LIGHT SW1–2 : Closed with brake pedal depressed

E3(A), E4 (B), E5 (C), E6 (D), E7 (E) ENGINE CONTROL MODULES1-E1 : 9-14 volts with vehicle not move and shift lever in D position

S2,SL-E1 : 0-1.5 volts with vehicle not moveSTP–E1 : 7.5–14 volts with brake pedal depressed

: 0–1.5 volts with brake pedal releasedTHW–E1 : 0.2–1.0 volts with idling, engine coolant temp. 60°C (140°F)–120°C (248°F)

THOC–E1 : Below 1.0 volts with fluid temp. 110°C (230°F)VTA–E1 : 0.4–1.0 volts with ignition SW on and throttle valve fully closed

: 3.2–4.8 volts with ignition SW on and throttle valve fully openVC–E1 : 4.5–5.5 volts with ignition SW at ON or ST position

ODMS–E1 : 9–14 volts with O/D main SW turned on: 0–3 volts with O/D main SW turned off

SPD–E1 : Pulse generation with vehicle moving2–E1 : 7.5–14 volts with shift lever at 2 position

: 0–1.5 volts with shift lever at except 2 positionL–E1 : 7.5–14 volts with shift lever at L position

: 0–1.5 volts with shift lever at except L position+B–E1 : 9–14 volts with ignition SW at ON or ST position

BATT–E1 : Always 9–14 volts

P1 A/T INDICATOR SW [PARK/NEUTRAL POSITION SW]3–1 : Closed with shift lever in P position3–2 : Closed with shift lever in R position3–5 : Closed with shift lever in N position3–7 : Closed with shift lever in D position3–4 : Closed with shift lever in 2 position3–8 : Closed with shift lever in L position

: PARTS LOCATION

Code See Page Code See Page Code See Page

A4 30 (2UZ–FE) E6 D 34 J23 A 35

C11 A 34 E7 E 34 J24 B 35

C12 B 34 J1 31 (2UZ–FE) O1 31 (2UZ–FE)

C13 C 34 J5 35 O4 35

C14 D 34 J8 35 P1 31 (2UZ–FE)

D8 34 J9 35 S4 35

E1 30 (2UZ–FE) J10 35 T2 31 (2UZ–FE)

E2 30 (2UZ–FE) J11 35 V2 31 (2UZ–FE)

E3 A 34 J12 35 V3 31 (2UZ–FE)

E4 B 34 J18 31 (2UZ–FE)

E5 C 34 J20 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

SERVICE HINTS

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2003 TOYOTA TUNDRA (EWD491U)

149

(2UZ–FE)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1D22 (*2)

1D26 (*1)

1F22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1G22 (*2)

1G26 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA4 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IE1 46 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

: GROUND POINTS

Code See Page Ground Points Location

EA 40 (2UZ–FE) Front Left Fender

EB 40 (2UZ–FE) Rear Bank of Right Cylinder Head

EC 40 (2UZ–FE) Rear Bank of Left Cylinder Head

IE 44 Left Kick Panel

IH 44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I2 46 Cowl Wire I5 46 Cowl Wire

I3 46 Engine Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

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ELECTRONICALLY CONTROLLED TRANSMISSION AND A/T INDICATOR

2

2

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1F

2

1 5

2 3

2

B–R

2 2

IA414

W–B

B–R

B–R

IA46

JUN

CT

ION

CO

NN

EC

TO

R

A1

W B Y

4 8 7

R

G–R

E2E3 E1

1

1D4

A20A16

+B

G–W

1

W–B

W–L

THW

1

2

2

1

2 EF1

E19 E11 E18

1 EF1

I 3I 3

A/T

OIL

TE

MP

. S

EN

SO

RA

4

EN

GIN

E C

OO

LAN

TT

EM

P.

SE

NS

OR

E 2

G–Y

R–Y

G–Y

B–W

B–W

BR

–B

B–W

B–W

B–W B–W

ELE

CTR

ON

ICA

LLY

CO

NTR

OLL

ED

TR

AN

SM

ISS

ION

SO

LEN

OID

E 1

NO

. 1

NO

. 2

SL

EFIRELAY

E2OIL

SLS2S1

STPBATT

G–Y

E 3

ENGINE CONTROL MODULE

BA , E 4 D, E 6 E, E 7

G–W

G–W

C

J 1

B

B

W–L

W–L

2

B–R

B–Y

B–Y

B–Y

A4

EA

C

JUN

CTI

ON

CO

NN

EC

TOR

J10

IA4151D

B–Y

MREL

ST

OP

LIG

HT

SW

S 4

2

1

A7

BB

1F6

STA

IE212

9

6

N

P

PA

RK

/NE

UT

RA

LP

OS

ITIO

N S

W

P 1

PPP

AA

A

B3

P

NSW

JUN

CTI

ON

CO

NN

EC

TO

R

J 8

IA424

G–R

W–B

IE219

W–B

2

3 1

5 2

2

W

ST

RE

LAY

W–B

2

C8 C3

( *4)

( *3)P ( *3)

G–R

15AEFINO. 1

15ASTOP

5ASTA

SRLY ST

TVIP ECU

T13 C

O

2 6

G

W–L

G–W

C11

SLT–

C

B–R

5

SLT+

JUN

CTI

ON

CO

NN

EC

TOR

J18

A

A

C, E 5

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2003 TOYOTA TUNDRA (EWD491U)

151

(5VZ–FE)

B

ENGINE CONTROL MODULE

E 3

7

E03

E

L–O

B–W

E

3 4

15

1

E25

W–R

B6 B5 B4

J 9

3

JUNCTIONCONNECTOR

E02

5 E

ED

VTA

GR(*4)

B–Y

GR(*3)

B–Y

D 8DIODE (A/T)

OILWE1SP2+SP2–

2

A

RVC

6

22 D D23 D17 B21

1

2

Y–R BR

V 3

VE

HIC

LE S

PE

ED

SE

NS

OR

( ELE

CT

RO

NIC

ALL

Y C

ON

TR

OLL

ED

TR

AN

SM

ISS

ION

)

DD

1

Y–R

W–B

Y–R

W–B

15AACC

1G11 9 1F

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

10AGAUGE

2

J 8JUNCTIONCONNECTOR

AA

EE

8

1F

1

W–B

W–B

W–B

3

L

G–OLGR–B

G–B

B–Y

L–B

B–Y

R–B

L

LG

G–O

THROTTLE POSITIONSENSOR

T 2

* 1 : W/ CRUISE CONTROL* 2 : W/O CRUISE CONTROL

E01

4 E

5 1F

B–Y

BR

A , E 4 D, E 6 E, E 7

O 4

O/D

MA

IN S

W

B–Y

L SP1

E8

W–B

5AIGN

1F11

A15

IGSW

B–O

E04

* 3 : W/ DOOR LOCK CONTROL* 4 : W/O DOOR LOCK CONTROL

G–B

B–Y

B–O

G–O

W–B

GR(*3)

J 9JUNCTIONCONNECTOR

ODLP

B20

L–O

ODMS

B14

R

W–B

BR

ME01

6 D

IE

AA

BA

W–B

JUNCTIONCONNECTOR

BJ23 , J24A

C

2

4

VTA2

R–B

R–B

W–R

B25

D

W–R

JUN

CT

ION

CO

NN

EC

TO

RJ

5

B

B

B–O

B–O

( *1)

( *1)

( *2)

( *1)

C, E 5

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152

ELECTRONICALLY CONTROLLED TRANSMISSION AND A/T INDICATOR

IE1

4

L

LL 2L DL NL RL PL

8 4 7 5 2 1

3

A/T

OIL

TE

MP

.

A9 C3

IE26 IE226 IE22 IE215 21 IE2IE223

D10 D3

SP

EE

DO

ME

TE

R

O/D

OFF

CC

C

B

BB

B

A

A

D4D5D6D7D8D9

R–B

LG–B

W–R

LG

LLG

L–BL–B

LGB–Y

R–B

L

LG

G–O

A/T INDICATOR SW[PARK/NEUTRAL POSITION SW]

P 1

BA

B8 A7

B–Y

IH

L–O

Y–R

Y–R B

R

W–B

BR

L 2 D N R P

C

J 8

JUN

CT

ION

CO

NN

EC

TO

R

C13 C2

IE23 IE225

P–L

G–B

2 3

P–L

G–B

W–B

L–Y

L–Y

C11

CO

MB

INA

TIO

N M

ET

ER

BA

, C

12C

, C

13D

, C

14

L

JUN

CT

ION

CO

NN

EC

TO

R

J12

JUN

CTI

ON

CO

NN

EC

TOR

J 8

LG L

W–R

LG–B

R–B

W–R

R–B

JUN

CTI

ON

CO

NN

EC

TOR

J12

VE

HIC

LE S

PE

ED

SE

NS

OR

( CO

MB

INA

TIO

N M

ET

ER

)

V 2

IE12

1 B–Y

B–Y

B–Y

B–Y

G–O

RB

C

I 2W–B

IE

L

W–R

W–R

B

BA

AAW–B W–B

JUNCTIONCONNECTOR

BJ23 , J24A

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2003 TOYOTA TUNDRA (EWD491U)

153

(5VZ–FE)

Previous automatic transmissions have selected each gear shift using mechanically controlled throttle hydraulic pressure,governor hydraulic pressure and lock-up hydraulic pressure. The electronically controlled transmission, however, electricallycontrols the governor pressure and lock-up sensor through the solenoid valve. Control of the solenoid valve by the enginecontrol module based on the input signals from each sensor makes smooth driving possible by shift selection for each gearwhich is most appropriate to the driving conditions at that time.

1. GEAR SHIFT OPERATIONDuring driving, the engine control module selects the shift for each gear which is most appropriate to the driving conditions,based on input signals from the engine coolant temp. sensor to TERMINAL THW of the engine control module and also theinput signals to TERMINAL SP2+ of the engine control module from the vehicle speed sensor devoted to the electronicallycontrolled transmission. Current is then output to the electronically controlled transmission solenoid. When shifting to 1stspeed, current flows from TERMINAL S1 of the engine control module to TERMINAL 4 of the electronically controlledtransmission solenoid to GROUND, and continuity to the No.1 solenoid causes the shift.For 2nd gear, current flows from TERMINAL S1 of the engine control module to TERMINAL 4 of the electronically controlledtransmission solenoid to GROUND, and from TERMINAL S2 of the engine control module to TERMINAL 8 of theelectronically controlled transmission solenoid to GROUND. And continuity to solenoid No.1 and No.2 causes the shift.For 3rd gear, there is no continuity to No.1 solenoid, only to No.2 causing the shift. Shifting into 4th gear (Overdrive) takesplace when there is no continuity to either No.1 or No.2 solenoid.

2. LOCK-UP OPERATIONWhen the engine control module judges from each signal that lock-up operation conditions have been met, current flowsfrom TERMINAL SL of the engine control module to TERMINAL 7 of the electronically controlled transmission solenoid toGROUND, causing continuity to the lock-up solenoid and causing lock-up operation.

3. STOP LIGHT SW CIRCUITIf the brake pedal is depressed (Stop light SW on) when driving in lock–up position, a signal is input to TERMINAL STP ofthe engine control module. As a result, the engine control module cuts the current to the solenoid to release the lock–up.

4. OVERDRIVE CIRCUIT∗ O/D main SW on

When the O/D main SW is switched to ON position, a signal is input to TERMINAL ODMS of the engine control module,and enables shift change to the overdrive range, through the control of the engine control module.

∗ O/D main SW offWhen the O/D main SW is switched to OFF position, a signal is input to TERMINAL ODMS of the engine control module,and prohibits shift change to the overdrive range through the control of the engine control module. When in the overdriverange already, shift down is made.

SYSTEM OUTLINE

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2003 TOYOTA TUNDRA (EWD491U)

154

ELECTRONICALLY CONTROLLED TRANSMISSION AND A/T INDICATOR

E1 ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID4, 7, 8-GROUND : Approx. 13 Ω

O4 O/D MAIN SW3–1 : Open with O/D main SW at ON position

Closed with O/D main SW at OFF position

S4 STOP LIGHT SW1–2 : Closed with brake pedal depressed

E3(A), E4 (B), E6 (C), E7 (D) ENGINE CONTROL MODULES1-E1 : 9-14 volts with vehicle not move and shift lever in D position

S2,SL-E1 : 0-1.5 volts with vehicle not moveSTP–E1 : 7.5–14 volts with brake pedal depressed

: 0–1.5 volts with brake pedal releasedTHW–E1 : 0.2–1.0 volts with idling, engine coolant temp. 60°C (140°F)–120°C (248°F)VTA–E1 : 0.3–1.0 volts with ignition SW on and throttle valve fully closed

: 3.2–4.9 volts with ignition SW on and throttle valve fully openVC–E1 : 4.5–5.5 volts with ignition SW at ON or ST position

ODMS–E1 : 9–14 volts with O/D main SW turned on: 0–3 volts with O/D main SW turned off

SP1–E1 : Pulse generation with vehicle moving2–E1 : 7.5–14 volts with shift lever at 2 position

: 0–1.5 volts with shift lever at except 2 positionL–E1 : 7.5–14 volts with shift lever at L position

: 0–1.5 volts with shift lever at except L position+B–E1 : 9–14 volts with ignition SW at ON or ST position

BATT–E1 : Always 9–14 voltsOIL–E2 : 0.1–0.9 volts after engine warm up

OILW–E1 : 0–1.5 volts with engine cranking at 400 rpm or more

P1 A/T INDICATOR SW [PARK/NEUTRAL POSITION SW]3–1 : Closed with shift lever in P position3–2 : Closed with shift lever in R position3–5 : Closed with shift lever in N position3–7 : Closed with shift lever in D position3–4 : Closed with shift lever in 2 position3–8 : Closed with shift lever in L position

: PARTS LOCATION

Code See Page Code See Page Code See Page

A4 32 (5VZ–FE) E5 C 34 J23 A 35

C11 A 34 E6 D 34 J24 B 35

C12 B 34 E7 E 34 O4 35

C13 C 34 J1 33 (5VZ–FE) P1 33 (5VZ–FE)

C14 D 34 J5 35 S4 35

D8 34 J8 35 T2 33 (5VZ–FE)

E1 32 (5VZ–FE) J9 35 T13 C 35

E2 32 (5VZ–FE) J10 35 V2 33 (5VZ–FE)

E3 A 34 J12 35 V3 33 (5VZ–FE)

E4 B 34 J18 33 (5VZ–FE)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

SERVICE HINTS

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2003 TOYOTA TUNDRA (EWD491U)

155

(5VZ–FE)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1D22 (*2)

1D26 (*1)

1F22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1G22 (*2)

1G26 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EF1 42 (5VZ–FE) Engine Wire and Sensor Wire (Over the Cylinder Head)

IA4 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IE146 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

IE246 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

: GROUND POINTS

Code See Page Ground Points Location

EA 42 (5VZ–FE) Front Left Fender

ED 42 (5VZ–FE) Intake Manifold Left

IE 44 Left Kick Panel

IH 44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I2 46 Cowl Wire I3 46 Engine Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

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2003 TOYOTA TUNDRA (EWD491U)

156

ABS

5AECU IG

1K3

10AGAUGE

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1F5

YB–Y

EA17

B–L

YW

D

D

W

7

11 63

B–L

2

1

40A

AB

S2

1

40A

AB

S3

2 2

B–R

B–Y

EA13EA16

22

L

EA15

L

12

23

LG

EA12

LG

FR–FR+

B–Y

B–R

JUNCTIONCONNECTOR

J 5

DATA LINK CONNECTOR 3D 6

ABS SPEED SENSORFRONT RH

A 7

8

V

EA14

V

12

9

P

EA11

P

FL–FL+

ABS SPEED SENSORFRONT LH

A 6

15

TC

W–G

D

171

+BS +BM WA IG1D/G

JUNCTIONCONNECTOR

J 8

ABS ACTUATOR WITH ECUA 5

BATTERY

22

SIL

D

W–G

13

TC

W–G

R–L

7

TS

12

TS

A9

C7

AB

S W

AR

NIN

G L

IGH

T[C

OM

B.

ME

TE

R]C

C11

A,

C13

( *1) B ( *2)

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14

L–R

TO D

ETE

CTI

ON

SW

( TR

AN

SF

ER

L4

PO

SIT

ION

)

EXI

4

W

5

R

RL–RL+

BB18 BB19

R W

2 1

20

Y

19

B

RR–RR+

BB110 BB111

B Y

4 3

II

A A

2

GND1

18

GND2

24

STP

15ASTOP

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1F2

G–Y

1

2

G–W

C

C

G–W

W–B

W–B

JUNCTIONCONNECTOR

J10

ABS ACTUATOR WITH ECUA 5

JUNCTIONCONNECTOR

J13

* 1 : TOWING PACKAGE* 2 : EXCEPT TOWING PACKAGE

ABS SPEED SENSOR REARA19

LH RH

ST

OP

LIG

HT

SW

S 4

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ABS

This system controls the respective brake fluid pressures acting on the disc brake cylinders of the right front wheel, left frontwheel, and rear wheels when the brakes are applied in a panic stop so that the wheels do not lock.This results in improved directional stability and steerability during panic braking.

1. INPUT SIGNAL(1) Speed sensor signal

The speed of the wheels is detected and input to TERMINALS FL+, FR+, RL+ and RR+ of the ABS actuator with ECU.(2) Stop light SW signal

A signal is input to TERMINAL STP of the ABS actuator with ECU when the brake pedal is depressed.

2. SYSTEM OPERATIONDuring sudden braking, the ABS actuator with ECU which has signals input from each sensor lets the hydraulic pressureacting on each wheel cylinder escape to the reservoir.The pump inside the ABS actuator with ECU is also operating at this time and it returns the brake fluid from the reservoir tothe master cylinder, thus preventing locking of vehicle wheels.If the ABS actuator with ECU judges that the hydraulic pressure acting on the wheel cylinder is insufficient, the current actingon the solenoid is controlled and the hydraulic pressure is increased.Holding of the hydraulic pressure is also controlled by the ECU, by the same method as above, by repeated pressurereduction. Holding and increase are repeated to maintain vehicle stability and to improve steerability during sudden braking.

A6, A7 ABS SPEED SENSOR FRONT LH, RH1–2 : 0.92–1.22 kΩ (20°C, 68°F)

A19 ABS SPEED SENSOR REAR1–2 : 0.89–1.29 kΩ (20°C, 68°F)3–4 : 0.89–1.29 kΩ (20°C, 68°F)

A5 ABS ACTUATOR WITH ECU6–GROUND : 10–14 volts with ignition SW at ON or ST position

24–GROUND : 10–14 volts with stop light SW on (Brake pedal depressed)2, 18–GROUND : Always continuity

S4 STOP LIGHT SW2–1 : Closed with brake pedal depressed

: PARTS LOCATION

Code See Page Code See Page Code See Page

A530 (2UZ–FE)

A1936 (Access Cab) J8 35

A532 (5VZ–FE)

A1937 (Standard Cab) J10 35

A630 (2UZ–FE) C11 A 34 J13 35

A632 (5VZ–FE) C13 C 34 S4 35

A730 (2UZ–FE) D6 34

A732 (5VZ–FE) J5 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1F22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1K22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1K26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SYSTEM OUTLINE

SERVICE HINTS

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: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EA140 (2UZ–FE)

Cowl Wire and Engine Room Main Wire (Right Fender)EA142 (5VZ–FE)

Cowl Wire and Engine Room Main Wire (Right Fender)

BB148 (Access Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)BB150 (Standard Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)

: GROUND POINTS

Code See Page Ground Points Location

II 44 Right Kick Panel

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160

CRUISE CONTROL (2UZ–FE)

15AEFI NO. 1

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

2

5 1

3 2

2 2

2 2

A8 A3

5AIGN

1F11

B

B

15ASTOP

1F2

B12 B19

EA

A2 A1 C1

EC

I 5

IA414

B

C4 C7 E6 E7

EB

E21 E31E28

10AETCS

2

IA51

B6

B–Y

B–R

B–R

B–Y

B–R

B–Y

B–R

B–O

A9

B–O

B–O

G–Y

EFI

RE

LAY

B

JUN

CTI

ON

CO

NN

EC

TOR

J 5

E 3

ENGINE CONTROL MODULE

BA , E 4 C, E 5 D, E 6

+B2 +B E1ME01 E03 E02 E01 E2 VTA1 VTA2

MREL BATT IGSW ST1– STP

W–L

W–L

BR

W–B

W–B

W–B

W–B

B–W B–Y

P–L

W–L

W–B

W–L

6 4 5

3

W–B

W–B

W–B

BR

W–B

W–L

W–L B

JUNCTIONCONNECTOR

J 1

THR

OT

TLE

PO

SIT

ION

SE

NS

OR

T 2

W–G

W–G

2

+BM

BR

I 3BRBR

B–W

G–W

2

1D1

STOP LIGHTSW

S 4

JUNCTIONCONNECTOR

J10

L–B

G–W

3 2

4 1

C

1 1

IA415 IA46

C

1D

4 G–W

E, E 7

A

A JUN

CTI

ON

CO

NN

EC

TO

R

J18

W–B

E18

VC

C17

GE01

C3

M–

G–B

C2

M–

I 3

1

R

2

W

( SH

IELD

ED

)

BR

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10AGAUGE

1F8

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

B17 B13

A22 A23 A28

B8 C13 C2

C3 A9

1F5

D D

IH

C

C

IE19 IE117 IE17

* 2 : W/O DOOR LOCK CONTROL* 1 : W/ DOOR LOCK CONTROL

B–Y

B–Y

G–O G–O

JUNCTIONCONNECTOR

J 9

CRUISE

SP

EE

DO

ME

TE

R

C11

CO

MB

INA

TIO

N M

ETE

R

CA

, C

13

R–G L

V–R

BR

B–R

6 3 5

ACCEL PEDAL POSITION SENSORA20

JUNCTIONCONNECTOR

J 8

VEHICLE SPEEDSENSOR(COMBINATION METER)

V 2

P–L

L–Y

P–L

L–Y

B–Y

SPD

VPA VPA2 EPA

PI

1

2 3

BR

B24

CCS

G

4

5

BR

CR

UIS

E

RES/ACC

SET/COAST

CANSEL

CRUISE CONTROL SW[COMB. SW]

C16

IE1

5BR

B–Y

ECC

CCS

B10

D

B

B

W–R

JUNCTIONCONNECTOR

J 8

6 IE1

7

3

IE126

1G11

15AACC

1F9

DIO

DE

(A

/T)

D 8

JUNCTIONCONNECTOR

J 8

D POSITION SW[PARK/NEUTRAL POSITION SW]

P 1

2

A

E

A

E

3

1

L–B

GR(*1)

B–Y

GR(*2)

GR(*1)

L–B

W–R

W–R

B–Y

GR(*2)

J 9JUNCTIONCONNECTOR

E 3

ENGINE CONTROL MODULE

BA , E 4 E 5, C D, E 6 E, E 7

LG–R

EPA2

A29A26 A27

P–G

G–R

24 1

VCPA VCP2

G–O

II12

G

B,

C12

C9

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CRUISE CONTROL (2UZ–FE)

The cruise control system is a constant vehicle speed controller which controls the opening angle of the engine throttle valveby the SW, and allows driving at a constant speed without depressing the accelerator pedal.

SET CONTROLWhen the SET/COAST SW is operated while traveling with the main SW on, the speed when the SET/COAST SW isoperated to off is memorized, and the vehicle speed is controlled at that speed.

COAST CONTROLWhen the SET/COAST SW is operated to on, the cruise control opening angle requirement is turned to 0 to decrease thevehicle speed, and the speed when the SET/COAST SW is operated to off is memorized, and the vehicle speed is controlledat that speed.Furthermore, every time the SET/COAST SW is operated momentarily (Approx. 0.5 sec.) to on, the memorized vehiclespeed is decreased by approx. 1.6 km/h (1.0 mph).

ACCEL CONTROLWhen the RES/ACC SW is operated to on, the throttle motor rotates the throttle valve to open direction to increase thevehicle speed, and the speed when the RES/ACC SW is operated to off is memorized, and the vehicle speed is controlled atthat speed.Furthermore, every time the RES/ACC SW is operated momentarily (Approx. 0.5 sec.) to on, the memorized vehicle speed isincreased by approx. 1.6 km/h (1.0 mph).

MANUAL CANCEL MECHANISMIf any of the following signals are input during cruise control traveling, the current to the motor flows in the direction to closethe throttle valve, and cancel the cruise control.(1) Stop lamp SW is on (Brake pedal is depressed)

(2) The CANCEL SW of the control SW is on

(3) CRUISE SW is off

RESUME CONTROLAfter canceling the cruise control (Except when the main SW is off) if the vehicle speed is above the minimum speed limit(Approx. 40km/h, 25mph), operating the RES/ACC SW to on from off will cause the system to accelerate and resume to thevehicle speed before manual cancellation.

OVERDRIVE FUNCTIONThe overdrive may be cut on an uphill grade, while traveling with the cruise control.After the overdrive is cut, if the vehicle speed reaches the overdrive resume speed (Set speed minus 2 km/h (1.2 mph) ), andif the system determines that the uphill grade has finished, the overdrive will resume after the overdrive timer operation.

AUTO CANCEL OPERATIONIf any of the following conditions are detected, the set speed is erased and the control is canceled.(1) Disconnection and/or short in the stop light SW(2) Malfunction in the vehicle speed signal(3) Malfunction in the electronic throttle parts(4) Malfunction in the stop light SW input circuit(5) Malfunction in the cancel circuit(6) The actual vehicle speed becomes slower than the minimum speed limit(7) The actual vehicle speed becomes –16 km/h (10 mph) slower than the set speed

E3 (A), E4 (B), E6 (D), E7 (E) ENGINE CONTROL MODULEIGSW–E1 : 9.0–14.0 volts with ignition SW at ON or ST positionBATT–E1 : Always 9.0–14.0 voltsSTP–E1 : 7.5–14.0 volts with brake pedal depressed

: Below 1.5 volts with brake pedal released

C16 CRUISE CONTROL SW [COMB. SW]5–3 : Approx. 1540Ω with CANCEL SW on

Approx. 240Ω with RES/ACC SW onApprox. 630Ω with SET/COAST SW on

SYSTEM OUTLINE

SERVICE HINTS

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: PARTS LOCATION

Code See Page Code See Page Code See Page

A20 34 E4 B 34 J9 35

C11 A 34 E5 C 34 J10 35

C12 B 34 E6 D 34 J18 31 (2UZ–FE)

C13 C 34 E7 E 34 P1 31 (2UZ–FE)

C16 34 J1 31 (2UZ–FE) S4 35

D8 34 J5 35 T2 31 (2UZ–FE)

E3 A 34 J8 35 V2 31 (2UZ–FE)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1D22 (*2)

1D26 (*1)

1F22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1G22 (*2)

1G26 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA444 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IA544 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IE1 46 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

II1 46 Cowl Wire and Cowl Wire (Instrument Panel Reinforcement RH)

: GROUND POINTS

Code See Page Ground Points Location

EA 40 (2UZ–FE) Front Left Fender

EB 40 (2UZ–FE) Rear Bank of Right Cylinder Head

EC 40 (2UZ–FE) Rear Bank of Left Cylinder Head

IH 44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I3 46 Engine Wire I5 46 Cowl Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

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CRUISE CONTROL (5VZ–FE)

B

2

100A

ALT

1

2

1

40A

AM

1

2

22

15A

EFI

NO

. 1

1

2

2 4AM1

ACC

IG1

1 5

2 3

2 2

2 2

EA

A

A

B

B

W–L

W–B

IA414

JUN

CTI

ON

CO

NN

EC

TOR

J 1

1I2

10AGAUGE

1F9

IA415

JUN

CTI

ON

CO

NN

EC

TOR

J18

A16

BATT

IA46

A4

MREL

A1

+B

ENGINE CONTROL MODULE

BE 3 , E 4A C, E 5 D, E 6 E, E 7

E6

ME01 E04

8 E D17

E1 E01

4 E E5

E02 E03

7 E

ED

BATTERY

WB–R

B–Y

B–R

B–R

B–Y

B–Y

B–R

B–Y

B–R

B–Y

B–Y

B–Y

W–L

W–L

W–L

BR

W–B BR

W–B

W–B

W–BW

–B

IGNITION SWI23

EFIRELAY

1F5B

–Y

B–Y

8 1F

B–Y

B–Y

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ENGINE CONTROL MODULE

BE 3 , E 4A C, E 5 D, E 6 E, E 7

B25

D

2

1

E

E

JUN

CTI

ON

CO

NN

EC

TOR

J 8

CR

UIS

E C

ON

TRO

LC

LUTC

H S

W

C18

IE215

D

3

5A

A

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

15AACC

1G11

2

1 3

IE14

JUN

CTI

ON

CO

NN

EC

TOR

J 9P

AR

K/N

EU

TRA

LP

OS

ITIO

N S

W

P 1

W–R CC

5AIGN

1F11

B9

ST1–

B

B

A15

IGSW

B

JUNCTIONCONNECTOR

J 5

STO

P L

IGH

T S

WS

4

DIO

DE

( A/T

)D

8

C10

VPA

C15

VPA2

3 4 1

VPA VPA2 VC

E15

VTA

C4

VTA2

3 2 4

VTA VTA2 VC

E11

E2

2 1

E25

VC

E2E2

ACCEL PEDALSENSOR

A 8THROTTLE POSITIONSENSOR

T 2

E9

M+

C2

CL+

2 3 4

M+ CL+ CL–

C8

CL–

E31

M–

1

M–

THROTTLE CONTROL MOTORT 1

E17

GE01

B–Y

B–Y

L–B

B–Y

W–R

W–R

W–R

L–B

GR B–O

L–B

B–Y GR B

–O

B–O

L–RJUNCTION

CONNECTOR

J12

( M/T

)( M

/T)

(A/T)

( A/T

)( A

/T)

( A/T

)

( A/T

)( A

/T)

R–W R

G–B

G–B

G–B

B–W

B–W

B–W

B–Y

R–B

R G

Y L

G–B ( SH

IELD

ED

)

( SH

IELD

ED

)

BR

I 3 I 3

I 3

1 4

2 3

15ASTOP

1F2

G–W

A20

STP

G–W

G–WJ10JUNCTIONCONNECTOR

1D

4

1D

1C

C

G–W

B–Y B–Y

B–YB–Y

E

B–Y

( A/T

)

( A/T

)

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166

CRUISE CONTROL (5VZ–FE)

ENGINE CONTROL MODULE

BE 3 , E 4A C, E 5 D, E 6 E, E 7

15AETCS

2

A8

+BM

CCS

ECC

CANCEL

SET/COAST

RES/ACC

CRUISE

B22

CCS

ED

5

4

G

BR

BR

CRUISE CONTROL SW[COMB. SW]

C16

IA51

W–G

B–Y

CR

UIS

E

C3 A9

C9

SP

EE

DO

ME

TE

R

A6

D

D

G–O

B–Y

G–O

W–G

G–O

SP1

JUNCTIONCONNECTOR

J 9

C2C13

A17

Y

Y

32

B8

IH

BR

C

C

BR

IE23IE36

IE225IE34

P–L

G–B

P–L

G–B

(A/T)(M/T)

VEHICLE SPEED SENSOR(COMBINATION METER)

V 2

JUN

CTI

ON

CO

NN

EC

TOR

J 8

PI

CO

MB

INA

TIO

N M

ET

ER

CC

11A

, C

13

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

IE117

B–Y

1 B–Y

IE12

B–Y

B–Y

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The cruise control system is a constant vehicle speed controller which controls the opening angle of the engine throttle valveby the SW, and allows driving at a constant speed without depressing the accelerator pedal.

SET CONTROLWhen the SET/COAST SW is operated while traveling with the main SW on, the speed when the SET/COAST SW isoperated to off is memorized, and the vehicle speed is controlled at that speed.

COAST CONTROLWhen the SET/COAST SW is operated to on, the cruise control opening angle requirement is turned to 0 to decrease thevehicle speed, and the speed when the SET/COAST SW is operated to off is memorized, and the vehicle speed is controlledat that speed.Furthermore, every time the SET/COAST SW is operated momentarily (Approx. 0.5 sec.) to on, the memorized vehiclespeed is decreased by approx. 1.6 km/h (1.0 mph).

ACCEL CONTROLWhen the RES/ACC SW is operated to on, the throttle motor rotates the throttle valve to open direction to increase thevehicle speed, and the speed when the RES/ACC SW is operated to off is memorized, and the vehicle speed is controlled atthat speed.Furthermore, every time the RES/ACC SW is operated momentarily (Approx. 0.5 sec.) to on, the memorized vehicle speed isincreased by approx. 1.6 km/h (1.0 mph).

MANUAL CANCEL MECHANISMIf any of the following signals are input during cruise control traveling, the current to the motor flows in the direction to closethe throttle valve, and cancel the cruise control.(1) Stop lamp SW is on (Brake pedal is depressed)

(2) The CANCEL SW of the control SW is on

(3) CRUISE SW is off

RESUME CONTROLAfter canceling the cruise control (Except when the main SW is off) if the vehicle speed is above the minimum speed limit(Approx. 40km/h, 25mph), operating the RES/ACC SW to on from off will cause the system to accelerate and resume to thevehicle speed before manual cancellation.

OVERDRIVE FUNCTIONThe overdrive may be cut on an uphill grade, while traveling with the cruise control.After the overdrive is cut, if the vehicle speed reaches the overdrive resume speed (Set speed minus 2 km/h (1.2 mph) ), andif the system determines that the uphill grade has finished, the overdrive will resume after the overdrive timer operation.

AUTO CANCEL OPERATIONIf any of the following conditions are detected, the set speed is erased and the control is canceled.(1) Disconnection and/or short in the stop light SW(2) Malfunction in the vehicle speed signal(3) Malfunction in the electronic throttle parts(4) Malfunction in the stop light SW input circuit(5) Malfunction in the cancel circuit(6) The actual vehicle speed becomes slower than the minimum speed limit(7) The actual vehicle speed becomes –16 km/h (10 mph) slower than the set speed

E3 (A), E4 (B), E6 (D), E7 (E) ENGINE CONTROL MODULEIGSW–E1 : 9.0–14.0 volts with ignition SW at ON or ST positionBATT–E1 : Always 9.0–14.0 voltsSTP–E1 : 7.5–14.0 volts with brake pedal depressed

: Below 1.5 volts with brake pedal released

C16 CRUISE CONTROL SW [COMB. SW]5–3 : Approx. 1540Ω with CANCEL SW on

Approx. 240Ω with RES/ACC SW onApprox. 630Ω with SET/COAST SW on

SYSTEM OUTLINE

SERVICE HINTS

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CRUISE CONTROL (5VZ–FE)

: PARTS LOCATION

Code See Page Code See Page Code See Page

A8 32 (5VZ–FE) E5 C 34 J10 35

C11 A 34 E6 D 34 J12 35

C13 C 34 E7 E 34 J18 33 (5VZ–FE)

C16 34 I23 35 P1 33 (5VZ–FE)

C18 34 J1 33 (5VZ–FE) S4 35

D8 34 J5 35 T1 33 (5VZ–FE)

E3 A 34 J8 35 T2 33 (5VZ–FE)

E4 B 34 J9 35 V2 33 (5VZ–FE)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1D22 (*2)

1D26 (*1)

1F22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1G22 (*2)

1G26 (*1)

1I22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1I26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA444 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IA544 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IE1

IE2 46 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

IE3

g ( g )

: GROUND POINTS

Code See Page Ground Points Location

EA 42 (5VZ–FE) Front Left Fender

ED 42 (5VZ–FE) Intake Manifold Left

IH 44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I3 46 Engine Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

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SRS

NOTICE: When inspecting or repairing the SRS, perform the operation in accordance with the following precautionaryinstructions and the procedure and precautions in the Repair Manual for the applicable model year.

Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most important source of informationwhen troubleshooting. When troubleshooting the SRS, always inspect the DTCs before disconnecting the battery.

Work must be started after 90 seconds from when the ignition switch is turned to the ”LOCK” position and thenegative (–) terminal cable is disconnected from the battery.(The SRS is equipped with a back–up power source so that if work is started within 90 seconds fromdisconnecting the negative (–) terminal cable of the battery, the SRS may be deployed.)

When the negative (–) terminal cable is disconnected from the battery, the memory of the clock and audio system will becanceled. So before starting work, make a record of the contents memorized in the audio memory system. When work isfinished, reset the audio systems as they were before and adjust the clock. To avoid erasing the memory in eachmemory system, never use a back–up power supply from outside the vehicle.

Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during repairs.

Do not expose the steering wheel pad, front passenger airbag assembly, seat belt pretensioner, center airbag sensorassembly or front airbag sensor assembly directly to hot air or flames.

Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front passenger airbagassembly, seat belt pretensioner, center airbag sensor assembly and front airbag sensor assembly should be inspected.

Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.

Never disassemble and repair the steering wheel pad, front passenger airbag assembly, seat belt pretensioner, centerairbag sensor assembly or front airbag sensor assembly in order to reuse it.

If the steering wheel pad, front passenger airbag assembly, seat belt pretensioner, center airbag sensor assembly orfront airbag sensor assembly has been dropped, or if there are cracks, dents or other defects in the case, bracket orconnector, replace them with new ones.

Use a volt/ohmmeter with high impedance (10 kΩ/V minimum) for troubleshooting the system’s electrical circuits.

Information labels are attached to the periphery of the SRS components. Follow the instructions on the notices.

After work on the SRS is completed, perform the SRS warning light check.

If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the RepairManual.

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SRS

15AACC

1G10

B13

1 2

A2 A3

AIRBAG SQUIB(FRONT PASSENGER AIRBAG ASSEMBLY)

A16

P 3

PASSENGER AIRBAGMANUAL ON–OFF SW

BA , P 4

A1

B1

A3 B1

I24

INTE

GR

AT

ION

CO

NTR

OL

AN

D P

AN

EL

BA

, I2

5

B14

SPIRALCABLE

B13B10B11

A1A4

AIRBAG SQUIB(STEERING WHEEL PAD)

A17

21 21

IE IH

A

II

J13JUNCTIONCONNECTOR

A2 A1 C5 C6B27 B28

W–B

W–B

Y–B Y

Y–B Y

B2

W–B

Y–R

Y–G

Y–B Y

W–B R

Y–G

Y–R

GR

1 2

C 4

CENTER AIRBAG SENSOR ASSEMBLY

BA , C 5

P– P+ D+ D–

E1 E2 PL+ PL– PR+ PR–

SQB+ SQB–

E IND ECU– ECU+

PRETENSIONER LHP13

PRETENSIONER RHP14W

–B

R

W–B

C, C 6

ACC GND1

PIND GND

FROM POWER SOURCE SYSTEM(SEE PAGE 56)

RBE+

C8

B–L

3

SEAT BELT WARNINGOCCUPANT DETECTION SENSOR

S 5

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5AIGN

1M3

B5

B15

B

2 1

A

CONNECTIONDETECTIONPIN

B

2 1

A

CONNECTIONDETECTIONPIN

B26 B9 B20

IA11

W–R

W–R

IA12

BR

BR

B–W

BR

–W

B12 B19

D

D

D

D

W

W–G

W

A

A

10ADOME

2

B3

L–Y

B–Y

B–Y

A

B–O

B–YJUNCTIONCONNECTOR

J 5

JUN

CT

ION

CO

NN

EC

TO

R

J 8

7

SIL

DATA LINK CONNECTOR 3D 6

AIRBAG SENSORFRONT LH

A11AIRBAG SENSORFRONT RH

A12

IG2 LA

SL+ SL– SR+ SR– SIL TC

C 4 , A BC 5

CENTER AIRBAG SENSOR ASSEMBLY

C, C 6

FROM POWER SOURCE SYSTEM(SEE PAGE 56)* 2 : BENCH SEAT* 3 : SEPARATE SEAT, CAPTAIN SEAT (W/O POWER SEAT)

13

TC

JUN

CT

ION

CO

NN

EC

TO

R

J 5

W–G

LBE+

A11

B

B

B

B

BI13

B

B2 (*2)A1 (*1)

A2 (*1)

B1 (*2)

W–B

BI14

IE

JUNCTIONCONNECTOR

J10

A/B

11

B–Y

* 1 : W/ POWER SEAT

BB

7,

A

BU

CK

LE S

W L

HB

( *1,

*2)

( *1,

*2)

W–B

C3

C4

W–B

( *3)

B 7

C

BU

CK

LE S

W L

H

B ( *3)

1

2

B5

1F3

1E6

L–Y

C10

SRS WARNING LIGHT[COMB. METER]

CC12 , C13B

GSW2

B23

A14A21

F/PS

II11

R–B

( 2U

Z–FE

)

R–B

( 2U

Z–FE

)

ENGINE CONTROLMODULE

E 3 A

R–B

( 5V

Z–F

E)

L–Y

(*1, *2)

(2UZ–FE)(5VZ–FE)

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SRS

The SRS is a driver protection device which has a supplemental role to the seat belts.When the ignition SW on, the current from the IGN fuse flows to TERMINAL (B) 5 of the center airbag sensor assembly.If an accident occurs while driving, deceleration caused by a frontal impact is detected (by sensor) and when the frontalimpact exceeds a set level, the current from the IGN fuse flows to TERMINAL (B) 5 of the center airbag sensor assembly.This current flows to TERMINAL (B) 14, (A) 2, (C) 5 to TERMINAL 1 of the airbag squib (Steering wheel pad) andPretensioners to TERMINAL 2 to TERMINAL (B) 13, (A) 1, (C) 6 of the center airbag sensor assembly, and also flows toTERMINAL (B) 11 of the center airbag sensor assembly to TERMINAL (A) 4 of the passenger airbag manual On–Off SW toTERMINAL (A) 2 to TERMINAL 1 of the airbag squib (Front passenger airbag assembly) to TERMINAL 2 to TERMINAL (A)3 of the passenger airbag manual On–Off SW to TERMINAL (A) 1 to TERMINAL (B) 10 of the center airbag sensorassembly. Furthermore, the current flows to TERMINAL (B) 27 or (B) 28 to GROUND, causing the center airbag squibs toexpand.When the safing sensor built into the center airbag sensor assembly is on, airbag sensor is off and the current from the IGNfuse flows same as above–mentioned flowing, causing the airbag squibs to expand. When the safing sensor built into thecenter airbag sensor assembly is on, the airbag sensor on one of the above-mentioned circuits is activated so that currentflows to the airbag squibs and causes them to operate.The airbag stored inside the steering wheel pad is instantaneously expanded to soften the shock to the driver.The airbag stored inside the passenger’s instrument panel is instantaneously expanded to soften the shock to thepassenger.

1. FRONT PASSENGER AIRBAG ON/OFF OPERATIONWhen the passenger airbag manual On–Off SW is on, the current flowing from the IGN fuse to the airbag squib (Frontpassenger airbag assembly) is same as above, causing the airbag squib (Front passenger airbag assembly) to expand in anaccident.If the passenger airbag manual On–Off SW is turned to off, the current flows from the ACC fuse to TERMINAL (B) 13 of thepassenger airbag OFF indicator (Integration control and panel) to TERMINAL (A) 3 to TERMINAL (B) 2 of the airbag manualOn–Off SW to TERMINAL (B) 1 to TERMINAL (A) 1 of the integration control and panel to TERMINAL (B) 1 to GROUND,lighting the indicator up. Then the current between TERMINAL (B) 11 of the airbag sensor assembly and the airbag squib(Front passenger airbag assembly) is cut off, so that it does not expand the airbag squib (Front passenger airbag assembly)in an accident.

: PARTS LOCATION

Code See Page Code See Page Code See Page

A1130 (2UZ–FE) C4 A 34 J10 35

A1132 (5VZ–FE) C5 B 34 J13 35

A1230 (2UZ–FE) C6 C 34 P3 A 35

A1232 (5VZ–FE) C12 B 34 P4 B 35

A16 34 C13 C 34P13

36 (Access Cab)

A17 34 D6 34P13

37 (Standard Cab)

A 38 (w/ Power Seat) E3 A 34P14

36 (Access Cab)

B36 (Access Cab *3) I24 A 35

P1437 (Standard Cab)

B7B

37 (Standard Cab *3) I25 B 35S5

36 (Access Cab)

C36 (Access Cab *4) J5 35

S537 (Standard Cab)

C37 (Standard Cab *4) J8 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SYSTEM OUTLINE

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: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1E22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1E26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1F22 (*2)

1F26 (*1)

1G22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1G26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1M22 (*2)

1M26 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA1 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

II1 46 Cowl Wire and Cowl Wire (Instrument Panel Reinforcement RH)

48 (Access Cab)

BI1 50 (Standard Cab) Cowl Wire and Seat No.1 Wire (Under the Driver’s Seat)

52

( )

: GROUND POINTS

Code See Page Ground Points Location

IE 44 Left Kick Panel

IH44 Right Kick Panel

II44 Right Kick Panel

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

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4WD (2UZ–FE)

15AACC

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1G11

10AGAUGE

1F9 1F8 1F5

3

A

A

E

E

IE126

IE110

C

A9

C2 C13 B8 C3

IE117 IE19IE17

C

C

D

D

IH

B10 B11 A8 D1

4HI 4LO

GR

B–Y

B–Y

B–Y

JUN

CTI

ON

CO

NN

EC

TOR

J 8

DIODE(A/T)

D 8

GR

GR

B–Y( *

1)

( *2)

( *1)

1

2

L–B

L–B

LG–B

C

BR

R–L

P–L BR

G–O

Y–B

Y–B

BR

–Y BR–Y

JUN

CTI

ON

CO

NN

EC

TOR

J 9

JUN

CTI

ON

CO

NN

EC

TOR

J 8

VEHICLESPEED SENSOR(COMBINATION METER)

V 2

LG–B

B–Y

B–Y

R–L

P–L

3 2

1

G–O

BR–Y

Y–B

Y–B

G–O

LG–B

JUNCTIONCONNECTOR

J11

NE

UTR

AL

PO

SIT

ION

SW

[PA

RK

/NE

UT

RA

L P

OS

ITIO

N S

W]

P 1

LG–B

5

3

SP

EE

DO

ME

TE

R

C11

COMBINATION METER

BA , C12 C, C13

JUN

CTI

ON

CO

NN

EC

TOR

J 9

D, C14

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20A4WD

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1J1

12 4WD CONTROL ECUF 7

B3 B2 B1

A4 A5

I 4

II

BR–Y

Y–B

Y–B

G–O

LG–B

BR–Y

IE2

2

I 3

1

2

IE224

D

D

1

2

I 3

IE23

JUNCTION CONNECTORJ12

B–Y

20 7 4 21 3 5 25 18 6

BR

–Y

G–Y P

Y–B

G–O

LG–B

W–B

L–R

G–R

D D

L–R

L–R

L–R

14

DE

TE

CTI

ON

SW

( TR

AN

SFE

R L

4 P

OS

ITIO

N)

D 4

DE

TE

CTI

ON

SW

( TR

AN

SFE

R 4

WD

PO

SIT

ION

)

D 3

G–R

W–B

W–BW–BW–B

W–B

W–B

G–Y P

I24

INTE

GR

AT

ION

CO

NTR

OL

AN

D P

AN

EL

BA

, I2

5

W–B

W–B

L4

* 1 : W/ DOOR LOCK CONTROL* 2 : W/O DOOR LOCK CONTROL

H–L 2–4

IND2 IND1 GND

A

JUNCTIONCONNECTOR

J13

W–B

EXI3

IG

IND2 H–L 2–4 IND1 SPD N GND L4 4WD

4

ENGINECONTROLMODULE

E 4ABSACTUATORWITH ECU

A 5

L–R

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4WD (2UZ–FE)

I 3

IE114

EC11

ED11

GR

GR

GR

GR

3

IE217

EC14

ED12

LGLG

LGLG

6

IE29

EC14

ED14

R–W

R–W

R–W

R–W

2

IE216

EC13

ED13

R–B

R–B

R–B

R–B

5

IE28

EC15

ED15

RR

RR

1

10 23 11 2419

4WD CONTROL ECUF 7

W–B W–B

4ADD ACTUATORA 9

IE212IE213 IE226 IE220 IE221

13

GG

1

26

YY

8

B–R

B–R

3

9

B–W

B–W

5

22

LW

6

W–B

W–B

4

ED16

W–B

ADD DL1 DL2 DM1 DM2 TM1TM2 TL1 TL3 TL2

MM

W–B

TRANSFER SHIFTACTUATOR

T 3

H2

H4

L4

2

DE

TE

CTI

ON

SW

EC16

GR

FRO

M E

NG

INE

CO

NTR

OL

MO

DU

LE

GR

I 3

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In the conventional system, the 2–4 select SW and the transfer shift lever was used to shift the mode between H–L. In thissystem, the transfer shift lever is not used, and the H–L mode shift can be done by the transfer shift actuator.The mode can be changed by the touch select 2–4 SW and touch select high–low in the integration control and panel.The shift range is controlled according to the vehicle speed sensor and Park/Neutral position SW, and the indicator light isturned ON to inform the driver if any of the following conditions are detected:∗ The shift is not completed even though 3 seconds have elapsed after transfer operation.∗ The vehicle speed is above approximately 100 km/h (63 mph) when shifting from H2 to H4.∗ The vehicle speed is below approximately 5 km/h (3 mph) or the A/T shift lever is in a position other than N position, when

shifting from H4 to L4 or visa versa, and from L4 to H2.

TRANSFER OPERATIONH2 to H4When the touch select 2–4 SW in the integration control and panel is turned ON, a signal is input into TERMINAL 4 of the4WD control ECU.The 4WD control ECU is activated by this, and the current flows from the 4WD control ECU TERMINAL 13 to transfer shiftactuator TERMINAL 1 to motor to TERMINAL 2 to 4WD control ECU TERMINAL 26 to GROUND, and the transfer shifts to4WD (H4 position.)When the system shifts to 4WD, the detection SW (Transfer 4WD position) is turned ON, and the current flows from 4WDcontrol ECU TERMINAL 11 to ADD actuator TERMINAL 5 to motor to TERMINAL 1 to 4WD control ECU TERMINAL 24 toGROUND, and the ADD actuator is activated, and the ADD is connected. When the ADD is connected, the detection SW(ADD position SW) is turned ON, and the 4HI Indicator light comes ON.H4 to H2When the touch select 2–4 SW in the integration control and panel is turned OFF, a signal is input into TERMINAL 4 of the4WD control ECU.The 4WD control ECU is activated by this, and the current flows from the 4WD control ECU TERMINAL 26 to transfer shiftactuator TERMINAL 2 to motor to TERMINAL 1 to 4WD control ECU TERMINAL 13 to GROUND, and the transfer shifts to2WD (H2 position.)When the system shifts to 2WD, the detection SW (Transfer 4WD position) is turned OFF, and the current flows from 4WDcontrol ECU TERMINAL 24 to ADD actuator TERMINAL 1 to motor to TERMINAL 5 to 4WD control ECU TERMINAL 11 toGROUND, and the ADD actuator is activated, and the ADD is disconnected. When the ADD is disconnected, the detectionSW (ADD position SW) is turned OFF, and the 4HI indicator Light turns OFF.H4 to L4When the touch select high–low SW in the integration control and panel is turned ON, a signal is input into TERMINAL 7 ofthe 4WD control ECU.The 4WD control ECU is activated by this, and the current flows from the 4WD control ECU TERMINAL 13 to transfer shiftactuator TERMINAL 1 to motor to TERMINAL 2 to 4WD control ECU TERMINAL 26 to GROUND, and the transfer shifts to4WD LO position (L4 position.)The 4HI Indicator is turned OFF and the 4LO indicator is turned ON.L4 to H4When the touch select high–low SW in the integration control and panel is turned OFF, a signal is input into TERMINAL 7 ofthe 4WD control ECU.The 4WD control ECU is activated by this, and the current flows from the 4WD control ECU TERMINAL 26 to transfer shiftactuator TERMINAL 2 to motor to TERMINAL 1 to 4WD control ECU TERMINAL 13 to GROUND, and the transfer shifts to4WD HI position (H4 Position.)The 4HI indicator is turned ON and the 4LO indicator is turned OFF.The shift is not completed even though 3 seconds have elapsed after transfer operation.∗ The vehicle speed is above approximately 100 km/h (63 mph) when shifting from H2 to H4.∗ The vehicle speed is below approximately 5 km/h (3 mph) or the A/T Shift Lever is in a position other than N position,

when shifting from H4 to L4 or visa versa, and from L4 to H2.L4 to H2When the touch select 2–4 SW in the integration control and panel is turned OFF, a signal is input into TERMINAL 4 of the4WD control ECU.The 4WD control ECU is activated by this, and the current flows from the 4WD control ECU TERMINAL 26 to transfer shiftactuator TERMINAL 2 to motor to TERMINAL 1 to 4WD control ECU TERMINAL 13 to GROUND, and the detection SW(Transfer L4 position) is turned OFF.Furthermore, the motor rotates to shift the transfer to 2WD (H2 position.)When the system shifts to 2WD, the detection SW (Transfer 4WD position) is turned OFF, and the current flows from 4WDcontrol ECU TERMINAL 24 to ADD actuator TERMINAL 1 to motor to TERMINAL 5 to 4WD control ECU TERMINAL 11 toGROUND, and the ADD actuator is activated, and the ADD is disconnected. When the ADD is disconnected, the detectionSW (ADD position SW) is turned OFF, and the 4LO indicator light turns OFF.

SYSTEM OUTLINE

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4WD (2UZ–FE)

H2 to L4When the touch select 2–4 SW in the integration control and panel is turned ON, and the touch select high–low SW is turnedON, a signal is input into TERMINAL 4 of the 4WD control ECU.The 4WD control ECU is activated by this, and the current flows from the 4WD control ECU TERMINAL 13 to transfer shiftactuator TERMINAL 1 to motor to TERMINAL 2 to 4WD control ECU TERMINAL 26 to GROUND, and the transfer shifts to4WD (H4 position.)When the system shifts to 4WD, the detection SW (Transfer 4WD position) is turned ON, and the current flows from 4WDcontrol ECU TERMINAL 11 to ADD actuator TERMINAL 5 to motor to TERMINAL 1 to 4WD control ECU TERMINAL 24 toGROUND, and the ADD actuator is activated, and the ADD is connected. Then a signal is input into TERMINAL 7 of the4WD control ECU and the 4WD control ECU is activated by this, so the current flows from the 4WD control ECU TERMINAL13 to transfer shift actuator TERMINAL 1 to motor to TERMINAL 2 to 4WD control ECU TERMINAL 26 to GROUND. Thetransfer shifts to 4WD LO position (L4 position), and the 4LO indicator light comes ON.

F7 4WD CONTROL ECU12–GROUND : Approx. 12 volts with ignition SW at ON or ST position25–GROUND : Always continuity

3–GROUND : 4 pulses with 1 rotation4–GROUND : 2 volts or less with touch select 2–4 SW on

18–GROUND : 2 volts or less with detection SW (Transfer L4 position) on and transfer shift lever at L4 position

I24 (A), I25 (B) INTEGRATION CONTROL AND PANEL(A) 5–(B) 1 : Closed with touch select 2–4 SW on

P1 NEUTRAL POSITION SW [PARK/NEUTRAL POSITION SW]3–5 : Closed with A/T shift lever at N position

: PARTS LOCATION

Code See Page Code See Page Code See Page

A5 30 (2UZ–FE) D4 30 (2UZ–FE) J9 35

A9 30 (2UZ–FE) D8 34 J11 35

C11 A 34 E4 34 J12 35

C12 B 34 F7 35 J13 35

C13 C 34 I24 A 35 P1 31 (2UZ–FE)

C14 D 34 I25 B 35 T3 31 (2UZ–FE)

D3 30 (2UZ–FE) J8 35 V2 31 (2UZ–FE)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1F22 (*2)

1F26 (*1)

1G22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1G26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2)

1J26 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EC1 40 (2UZ–FE) Engine No.2 Wire and Engine Wire (Near the Starter)

ED1 40 (2UZ–FE) Engine No.2 Wire and Differential Wire (Near the Transmission)

IE146 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

IE246 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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: GROUND POINTS

Code See Page Ground Points Location

IH44 Right Kick Panel

II44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I3 46 Engine Wire I4 46 Cowl Wire

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180

4WD (5VZ–FE)

1

2

20A4WD

1J1

C

C

IE16

IE35IE21

A

II

J13JUNCTIONCONNECTOR

IE28IE31

C

2 4 10 1 5

EG15

M

IE220IE39

IE29IE32

IE118IE118

EG14

RR

R–W

LGLGR

R–B

R–B

R–W

R–W

EG13 EG12

R–B LG

1 2 5 6

EG11

3

I 4 IE1

7

D

D

4WD L4

D

I 3

2

1

W–B

W–B

IE213

D

D

TFN

DE

TEC

TIO

N S

W( T

RA

NS

FER

4W

D P

OS

ITIO

N)

D 3

JUNCTIONCONNECTOR

J11(A/T)(M/T)

B–R

B–R

W W

W

W

W

TRANSMISSIONCONTROL RELAY

T 4

7 9 3

W–B

(A/T)(M/T)

W–B

W–B

W–B W–B

W–B

W–B

4ADD ACTUATORA 9

W–B

W–B

GR

DETECTION SW(TRANSFER L4 POSITION)

D 4

L–R

(M/T)

JUN

CTI

ON

CO

NN

EC

TOR

J10

GR

GR

GR

GR

L–R

( A/T

)

L–R

( A/T

)

D

JUN

CT

ION

CO

NN

EC

TO

R

J12

L–R

(A/T)

GR

L–R

( A/T

)

R–Y

(A/T)

C

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

EG16

W

IE217

GR

( A/T

)

GR

( A/T

)

( M/T

)

IE310

GR

( M/T

)

( M/T

)

213

11ENGINE CONTROLMODULE

E 4

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14

B

B

2

1

IE224

I 3

A9D4

D2 B10

B

IE14

15AACC

1G11

10AGAUGE

1F5

A

A

IE221

1F9

W–B

GR

W–B

L–R

(M/T)

L–R

(A/T)

R–Y

(A/T)

EXI

ABS ACTUATOR WITHECU

A 5

L–R

( M/T

)

L–R

( M/T

)

R–Y

JUN

CTI

ON

CO

NN

EC

TO

R

J 9

R–Y

( A/T

)

R–Y

( A/T

)

R–Y

( A/T

)

W–B

( A/T

)

DE

TEC

TIO

N S

W( T

RA

NS

FER

NE

UTR

AL

PO

SIT

ION

)

D 5

R–Y

GR

(A/T)

A/T

P

4WD

L–Y

B–Y

L–Y

L–B

L–B

2

3 1

DIODE(A/T)

D 8

GR

( *1)

B–Y

GR

( *1)

B–Y

B–Y

E

E

JUNCTIONCONNECTOR

J 8

* 1 : W/ DOOR LOCK CONTROL* 2 : W/O DOOR LOCK CONTROL

GR

( *2)

3

NE

UT

RA

L P

OS

ITIO

N S

W[P

AR

K/N

EU

TRA

L P

OS

ITIO

N S

W]

P 1

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1

JUNCTIONCONNECTOR

J 9

( A/T

)

IE37

COMBINATIONMETER

BC11 , C12A D, C14

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4WD (5VZ–FE)

P1 NEUTRAL POSITION SW [PARK/NEUTRAL POSITION SW]3–1 : Closed with A/T shift lever at P position

D5 DETECTION SW (TRANSFER NEUTRAL POSITION)1–2 : Closed with transfer position at N position

: PARTS LOCATION

Code See Page Code See Page Code See Page

A5 32 (5VZ–FE) D4 32 (5VZ–FE) J10 35

A9 32 (5VZ–FE) D5 32 (5VZ–FE) J11 35

C11 A 34 D8 34 J12 35

C12 B 34 E4 34 J13 35

C14 D 34 J8 35 P1 33 (5VZ–FE)

D3 32 (5VZ–FE) J9 35 T4 35

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1F22 (*2)

1F26 (*1)

1G22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1G26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2)

1J26 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EG1 42 (5VZ–FE) Engine Wire and Differential Wire (Front Differential Upper Side)

IE1

IE2 46 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

IE3

g ( g )

: GROUND POINTS

Code See Page Ground Points Location

II 44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I3 46 Engine Wire I4 46 Cowl Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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MEMO

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2003 TOYOTA TUNDRA (EWD491U)

184

DOOR LOCK CONTROL (w/ DAYTIME RUNNING LIGHT)

E

5 1F

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

10AGAUGE

2

1

A7 B2 C1

E

IB39 IB38IB47

D22 2

31

DO

OR

KE

Y L

OC

K A

ND

UN

LOC

K S

W L

H

LOC

K

UN

LOC

K

UN

LOC

K

LOC

K

2 5

1

B 3

A9

C11

COMBINATIONMETER

BA , C12 C, C13

R–Y

G–B

L–R

P–B

Y–B

W–B

G–B

R–Y

R–Y

L–R

G–B

W–G

W–B

E

D C

D C

UN

LOC

K W

AR

NIN

GS

W

U 1

JUN

CT

ION

CO

NN

EC

TO

R

J 7

P–B

W–B

W–B

L

B–Y

DO

OR

LO

CK

CO

NTR

OL

SW

LH

[PO

WE

R W

IND

OW

MA

ST

ER

SW

]

P10

P–B

B13

L

JUN

CT

ION

CO

NN

EC

TOR

J 4B8

BR

C

C

JUN

CT

ION

CO

NN

EC

TOR

J 8

BR

2

10ADOME

B5

L–Y

1F3

L–Y

2

1

1E6

IB46

D

C R–Y

G–B

W–G

AA

BA BA

IE

W–B

W–B

JUN

CTI

ON

CO

NN

EC

TOR

BJ2

3A

, J2

4

W–B

W–B

B

BW

–G

B W–G

JUN

CTI

ON

CO

NN

EC

TOR

J 7

C

C

JUN

CTI

ON

CO

NN

EC

TOR

J 7

L–R

INTEGRATION RELAY

1N19 1N211N231N201N6

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IF46 IF47

DO

OR

KE

Y L

OC

K A

ND

UN

LOC

K S

W R

H

D23

UN

LOC

K

LOC

K

DO

OR

LO

CK

CO

NTR

OL

SW

RH

6 5

3D24

B 7 B 7

A

II

IF31

4 2

1 3

M

4 2

1 3

M

B 3IB34 IF34

A

IF

IB31

IB33 IB35 IF33 IF35

1H8 1H9 1J8

IH

D

D

W–G

R–Y

G–B

R–Y

W–B

W–B

W–B

W–B

L

W–B

W–B

L–W

L–Y

L–W

R–L

L–W

B–Y

W–B BR

L–Y

L–W

L–W

R–L

JUN

CTI

ON

CO

NN

EC

TOR

J 8

W–B

BR L

B–Y

W–B

B–Y

W–B

BR

L

UN

LOC

K

LOC

K

1 3

2

13 12 8

L–Y

W–G

DO

OR

LO

CK

MO

TOR

AN

D D

OO

R U

NLO

CK

DE

TEC

TIO

N S

W L

H

D25

DO

OR

LO

CK

MO

TOR

AN

D D

OO

R U

NLO

CK

DE

TEC

TIO

N S

W R

H

D26

IF39 IF38

R–Y

G–B

JUN

CTI

ON

CO

NN

EC

TOR

J13

W–B W–B

JUN

CT

ION

CO

NN

EC

TO

R

BJ2

1A

, J2

2

B–Y

A D

A D

JUN

CTI

ON

CO

NN

EC

TOR

J 7

R–L

BE

AE AE

L–W

L–Y

R–W

( 2U

Z–FE

)R

–Y

( 5V

Z–FE

)

W–B

INTEGRATION RELAY

AA W–B

1N2410 1N9 1N22 1N

JUN

CT

ION

CO

NN

EC

TO

R

BJ2

1A

, J2

2

BD

AF AF

JUNCTIONCONNECTOR

J 3

T13TVIP ECU

ACT–ACT+B–Y2 4

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2003 TOYOTA TUNDRA (EWD491U)

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DOOR LOCK CONTROL (w/ DAYTIME RUNNING LIGHT)

30APOWER

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1H7 6 1H

E

BE25

BG24

1

C

C

BF25

BH14

B 9

1

2

1

2

1

B 8

BJ

2

1

3

L

B–W

L

E

E CE

JUNCTIONCONNECTOR

J 4JUNCTIONCONNECTOR

J 5

L

B–W

B–W

B–W

B–W

W–B

W–B

DO

OR

CO

UR

TES

YS

W F

RO

NT

LH

D16

DO

OR

CO

UR

TES

YS

W R

EA

R L

H U

PP

ER

D19

DO

OR

CO

UR

TES

YS

W R

EA

R L

H L

OW

ER

D18

DO

OR

CO

UR

TES

YS

W F

RO

NT

RH

D17

( *1)

( *1)

( *1)

( *1)

( *1)

( *1)

( *1)

B–W ( *1)

B–W ( *1)

( *1)L

L ( *1)

( *2)

B–WL ( *2)

* 2 : STANDARD CAB* 1 : ACCESS CAB

1514

2

1

2

1

B 9

BK

B–W

B–W

W–B

W–B

DO

OR

CO

UR

TES

YS

W R

EA

R R

H U

PP

ER

D21

DO

OR

CO

UR

TES

YS

W R

EA

R R

H L

OW

ER

D20

B–W

(*1)

( *1)

( *1)

( *1)

(* 1)

INTEGRATION RELAY

BE24

BG25

B–W

(*1)

B–W ( *1)

B–W ( *1)

C

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Current always flows to TERMINAL 3 of the integration relay through the POWER fuse.

1. MANUAL LOCK OPERATIONTo push the door lock control SW or door key lock and unlock SW to LOCK position, a lock signal is input to the integrationrelay and causes the relay to function. Current flows from TERMINAL 3 of the relay to TERMINAL 13 to TERMINAL 2 of thedoor lock motors to TERMINAL 3 to TERMINAL 12 of the relay to TERMINAL 8 to GROUND and the door lock motor causesthe door to lock.

2. MANUAL UNLOCK OPERATIONTo push the door lock control SW or door key lock and unlock SW to UNLOCK position, an unlock signal is input to theintegration relay and causes the relay to function. Current flows from TERMINAL 3 of the relay to TERMINAL 12 toTERMINAL 3 of the door lock motors to TERMINAL 2 to TERMINAL 13 of the relay to TERMINAL 8 to GROUND and thedoor lock motor causes the door to unlock.

3. DOUBLE OPERATION UNLOCK OPERATIONWhen the door key lock and unlock SW LH is turned to unlock position, only the front LH door is mechanically unlocked.Turning the door key lock and unlock SW LH to the unlock side causes a signal to be input to the relay, and if the signal isinput again within 3 seconds by turning the door key lock and unlock SW LH to the unlock side again, current flows fromTERMINAL 12 of the integration relay to TERMINAL 3 of the door lock motors, TERMINAL 2 to TERMINAL 13 of theintegration relay to TERMINAL 8 to GROUND, causing the door lock motors to operate and unlock the doors.

4. KEY CONFINE PREVENTION FUNCTION∗ Operating door lock knob (In door lock motor operation)

With ignition key in cylinder (Unlock warning SW on), when any door is opened and locked using door lock knob (Doorlock motor), the door is locked once but each door is unlocked soon by the function of the integration relay. As a result,current flows from TERMINAL 3 of the relay to TERMINAL 12 to TERMINAL 3 of the door lock motors to TERMINAL 2 toTERMINAL 13 of the relay to TERMINAL 8 to GROUND and causes all the doors to unlock.

∗ Operating door lock control SW or door key lock and unlock SWWith ignition key in cylinder (Unlock warning SW on), when any door is opened and locked using the door lock controlSW or door key lock and unlock SW, all doors are locked once but each door is unlocked by the function of the SWcontained in motor, which inputs the signal to the integration relay. According to this input signal, current flows fromTERMINAL 3 of the relay to TERMINAL 12 to TERMINAL 3 of the door lock motors to TERMINAL 2 to TERMINAL 13 ofthe relay to TERMINAL 8 to GROUND and causes all the doors to unlock.

INTEGRATION RELAY8–GROUND : Always continuity3–GROUND : Always approx. 12 volts

12–GROUND : Approx. 12 volts for 0.2 seconds with following operations∗ Door lock control SW unlocked∗ Door lock control SW locked with ignition key in cylinder and LH or RH door open(Ignition key reminder function)∗ Door lock knob locked with ignition key in cylinder and LH or RH door open. (Ignition key reminder function)∗ Unlocking the LH, RH door cylinder with key

13–GROUND : Approx. 12 volts for 0.2 seconds with following operations∗ Door lock control SW locked∗ Locking the LH, RH door cylinder with key

14–GROUND : Continuity with front LH door open15–GROUND : Continuity with front RH door open (Standard cab)15–GROUND : Continuity with front RH, rear LH, RH door open (Access cab)

D16, D17 DOOR COURTESY SW FRONT LH, RH1–GROUND : Closed with door open

D22, D23 DOOR KEY LOCK AND UNLOCK SW LH, RH1–2 : Closed with door lock cylinder locked with key3–2 : Closed with door lock cylinder unlocked with key

D25, D26 DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW LH, RH4–1 : Closed with door lock knob UNLOCK position

U1 UNLOCK WARNING SW1–2 : Closed with key in cylinder

SYSTEM OUTLINE

SERVICE HINTS

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DOOR LOCK CONTROL (w/ DAYTIME RUNNING LIGHT)

: PARTS LOCATION

Code See Page Code See Page Code See Page

C11 A 34 D22 37 (Standard Cab) J7 35

C12 B 34D23

36 (Access Cab) J8 35

C13 C 34D23

37 (Standard Cab) J13 35

D1636 (Access Cab)

D2436 (Access Cab) J21 A 35

D1637 (Standard Cab)

D2437 (Standard Cab) J22 B 35

D1736 (Access Cab)

D2536 (Access Cab) J23 A 35

D1737 (Standard Cab)

D2537 (Standard Cab) J24 B 35

D18 36 (Access Cab)D26

36 (Access Cab)P10

36 (Access Cab)

D19 36 (Access Cab)D26

37 (Standard Cab)P10

37 (Standard Cab)

D20 36 (Access Cab) J3 35 T13 35

D21 36 (Access Cab) J4 35 U1 35

D22 36 (Access Cab) J5 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1E 26 (*1) Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1F

1H 26 (*1)Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J

( )Cowl Wire and Driver Side J/B (Lower Finish Panel)

1N 27 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IB344 Front Door LH Wire and Cowl Wire (Left Kick Panel)

IB444 Front Door LH Wire and Cowl Wire (Left Kick Panel)

IF346 Front Door RH Wire and Cowl Wire (Right Kick Panel)

IF446 Front Door RH Wire and Cowl Wire (Right Kick Panel)

BE2 48 (Access Cab) Floor No.2 Wire and Cowl Wire (Center of Left Rocker Panel)

BF2 48 (Access Cab) Floor No.1 Wire and Cowl Wire (Center of Right Rocker Panel)

BG2 48 (Access Cab) Floor No.2 Wire and Rear Door No.1 Wire LH (Under the Left Quarter Panel)

BH1 48 (Access Cab) Floor No.1 Wire and Rear Door No.1 Wire RH (Under the Right Quarter Panel)

: GROUND POINTS

Code See Page Ground Points Location

IE44 Left Kick Panel

IF44 Left Kick Panel

IH44 Right Kick Panel

II44 Right Kick Panel

BJ 48 (Access Cab) Inside of Rear Door LH

BK 48 (Access Cab) Inside of Rear Door RH

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

B348 (Access Cab)

Front Door LH WireB7 50 (Standard Cab) Front Door RH Wire

B350 (Standard Cab)

Front Door LH WireB8 48 (Access Cab) Rear Door No.1 Wire LH

B7 48 (Access Cab) Front Door RH Wire B9 48 (Access Cab) Rear Door No.1 Wire RH

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

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2003 TOYOTA TUNDRA (EWD491U)

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MEMO

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2003 TOYOTA TUNDRA (EWD491U)

190

DOOR LOCK CONTROL (w/o DAYTIME RUNNING LIGHT)

E

5 1F

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

10AGAUGE

2

1

A7 B2 C1

E

IB39 IB38IB47

D22

2

31

DO

OR

KE

Y L

OC

K A

ND

UN

LOC

K S

W L

H

LOC

K

UN

LOC

K

UN

LOC

K

LOC

K

2 5

1

B 3

A9

C11

COMBINATIONMETER

BA , C12 C, C13

INT

EG

RA

TIO

N R

ELA

Y

R–Y

G–B

L–R

P–B

Y–B

W–B

G–B

R–Y

R–Y

L–R

G–B

W–G

W–B

E

D C

D C

UN

LOC

K W

AR

NIN

GS

W

U 1

JUN

CT

ION

CO

NN

EC

TO

R

J 7

P–B

W–B

W–B

L

B–Y

DO

OR

LO

CK

CO

NT

RO

L S

W L

H[P

OW

ER

WIN

DO

W M

AS

TER

SW

]

P10

P–B

R–YB13

L

CB8

BR

C

C

JUN

CT

ION

CO

NN

EC

TOR

J 8

BR

2

10ADOME

B5

L–Y

1F3L–

Y

2

1

1E6

1L21L11L31L4

IB46

D

C R–Y

G–B

D

W–G

IE

AA

BA BA

JUN

CTI

ON

CO

NN

EC

TOR

BJ2

3A

, J2

4

W–B

B B

2 1

W–G

B

JUNCTIONCONNECTOR

J 7

DIODE(LOCK)

D28 JUNCTIONCONNECTOR

J 4

W–G

G–B

W–G

W–B

W–B

W–B

P–B

C

C

JUN

CTI

ON

CO

NN

EC

TOR

J 7

L–R

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2003 TOYOTA TUNDRA (EWD491U)

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IF46 IF47

DO

OR

KE

Y L

OC

K A

ND

UN

LOC

K S

W R

H

D23

UN

LOC

K

LOC

K

DO

OR

LO

CK

CO

NTR

OL

SW

RH

6 5

3D24

B 7 B 7

A

II

IF31

4 2

1 3

M

4 2

1 3

M

B 3IB34 IF34

A

IF

IB31

IB33 IB35 IF33 IF35

1H8 1H9 1J8

INTEGRATION RELAY

W–G

R–Y

G–B

R–Y

W–B

W–B

W–B

W–B

L

W–B

W–B

L–W

L–Y

L–W

R–L

L–W

B–Y

W–B

L–Y

L–W

L–W

R–L

W–B

L

B–Y

W–B

B–Y

W–B

L

W–B

UN

LOC

K

LOC

K

1 3

2

13 12 8

L–Y

R–Y

DO

OR

LO

CK

MO

TOR

AN

D D

OO

R U

NLO

CK

DE

TEC

TIO

N S

W L

H

D25

DO

OR

LO

CK

MO

TOR

AN

D D

OO

R U

NLO

CK

DE

TEC

TIO

N S

W R

H

D26

1L81L9

IF39 IF38

R–Y

G–B

JUNCTIONCONNECTOR

J 3

JUNCTIONCONNECTOR

J13

AA

W–G

AF

BDJUN

CTI

ON

CO

NN

EC

TOR

BJ2

1A

, J2

2

L–Y

W–B

A

A

D

D

JUN

CTI

ON

CO

NN

EC

TOR

J 7

BE

AE AE

R–L

JUN

CT

ION

CO

NN

EC

TOR

BJ2

1A

, J2

2

W–B

1 2

DIODE(UNLOCK)

D30

A

A

JUN

CTI

ON

CO

NN

EC

TOR

J 4

R–W

R–W

B–Y

AF

2 4ACT+ ACF

TVIP ECUT13

B–Y

B–Y

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DOOR LOCK CONTROL (w/o DAYTIME RUNNING LIGHT)

30APOWER

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

INTEGRATION RELAY

1H7 6 1H

E

BE25

BG24

1

C

C

BF25

BH14

B 9

1

2

1

2

1

B 8

BJ

2

1

3

L

B–W

L

E

E CE

JUNCTIONCONNECTOR

J 4JUNCTIONCONNECTOR

J 5

LL

B–W

B–W

B–W

B–W

W–B

W–B

DO

OR

CO

UR

TES

YS

W F

RO

NT

LH

D16

DO

OR

CO

UR

TES

YS

W R

EA

R L

H U

PP

ER

D19

DO

OR

CO

UR

TES

YS

W R

EA

R L

H L

OW

ER

D18

DO

OR

CO

UR

TES

YS

W F

RO

NT

RH

D17

( *1)

( *1)

( *1)

( *1)

( *1)

( *1)

( *1)

( *1)

B–W ( *1)

B–W ( *1)

( *1)L

( *2)

B–WL ( *2)

* 2 : STANDARD CAB* 1 : ACCESS CAB

1514

2

1

2

1

B 9

BK

B–W

B–W

W–B

W–B

DO

OR

CO

UR

TES

YS

W R

EA

R R

H U

PP

ER

D21

DO

OR

CO

UR

TES

YS

W R

EA

R R

H L

OW

ER

D20

B–W

( *1)

( *1)

( *1)

( *1)

(* 1)

BE24

BG25

B–W C

(*1)

B–W ( *1)

B–W ( *1)

IH

1L16

D

D

BR

JUN

CTI

ON

CO

NN

EC

TOR

J 8

BR

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Current always flows to TERMINAL 3 of the integration relay through the POWER fuse.

1. MANUAL LOCK OPERATIONTo push the door lock control SW or door key lock and unlock SW to LOCK position, a lock signal is input to the integrationrelay and causes the relay to function. Current flows from TERMINAL 3 of the relay to TERMINAL 13 to TERMINAL 2 of thedoor lock motors to TERMINAL 3 to TERMINAL 12 of the relay to TERMINAL 8 to GROUND and the door lock motor causesthe door to lock.

2. MANUAL UNLOCK OPERATIONTo push the door lock control SW or door key lock and unlock SW to UNLOCK position, an unlock signal is input to theintegration relay and causes the relay to function. Current flows from TERMINAL 3 of the relay to TERMINAL 12 toTERMINAL 3 of the door lock motors to TERMINAL 2 to TERMINAL 13 of the relay to TERMINAL 8 to GROUND and thedoor lock motor causes the door to unlock.

3. DOUBLE OPERATION UNLOCK OPERATIONWhen the door key lock and unlock SW LH is turned to unlock position, only the front LH door is mechanically unlocked.Turning the door key lock and unlock SW LH to the unlock side causes a signal to be input to the relay, and if the signal isinput again within 3 seconds by turning the door key lock and unlock SW LH to the unlock side again, current flows fromTERMINAL 12 of the integration relay to TERMINAL 3 of the door lock motors, TERMINAL 2 to TERMINAL 13 of theintegration relay to TERMINAL 8 to GROUND, causing the door lock motors to operate and unlock the doors.

4. KEY CONFINE PREVENTION FUNCTION∗ Operating door lock knob (In door lock motor operation)

With ignition key in cylinder (Unlock warning SW on), when any door is opened and locked using door lock knob (Doorlock motor), the door is locked once but each door is unlocked soon by the function of the integration relay. As a result,current flows from TERMINAL 3 of the relay to TERMINAL 12 to TERMINAL 3 of the door lock motors to TERMINAL 2 toTERMINAL 13 of the relay to TERMINAL 8 to GROUND and causes all the doors to unlock.

∗ Operating door lock control SW or door key lock and unlock SWWith ignition key in cylinder (Unlock warning SW on), when any door is opened and locked using the door lock controlSW or door key lock and unlock SW, all doors are locked once but each door is unlocked by the function of the SWcontained in motor, which inputs the signal to the integration relay. According to this input signal, current flows fromTERMINAL 3 of the relay to TERMINAL 12 to TERMINAL 3 of the door lock motors to TERMINAL 2 to TERMINAL 13 ofthe relay to TERMINAL 8 to GROUND and causes all the doors to unlock.

INTEGRATION RELAY8–GROUND : Always continuity3–GROUND : Always approx. 12 volts

12–GROUND : Approx. 12 volts for 0.2 seconds with following operations∗ Door lock control SW unlocked∗ Door lock control SW locked with ignition key in cylinder and LH or RH door open(Ignition key reminder function)∗ Door lock knob locked with ignition key in cylinder and LH or RH door open. (Ignition key reminder function)∗ Unlocking the LH, RH door cylinder with key

13–GROUND : Approx. 12 volts for 0.2 seconds with following operations∗ Door lock control SW locked∗ Locking the LH, RH door cylinder with key

14–GROUND : Continuity with front LH door open15–GROUND : Continuity with front RH door open (Standard cab)15–GROUND : Continuity with front RH, rear LH, RH door open (Access cab)

D16, D17 DOOR COURTESY SW FRONT LH, RH1–GROUND : Closed with door open

D22, D23 DOOR KEY LOCK AND UNLOCK SW LH, RH1–2 : Closed with door lock cylinder locked with key3–2 : Closed with door lock cylinder unlocked with key

D25, D26 DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW LH, RH4–1 : Closed with door lock knob UNLOCK position

U1 UNLOCK WARNING SW1–2 : Closed with key in cylinder

SYSTEM OUTLINE

SERVICE HINTS

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DOOR LOCK CONTROL (w/o DAYTIME RUNNING LIGHT)

: PARTS LOCATION

Code See Page Code See Page Code See Page

C11 A 34D23

36 (Access Cab) J7 35

C12 B 34D23

37 (Standard Cab) J8 35

C13 C 34D24

36 (Access Cab) J13 35

D1636 (Access Cab)

D2437 (Standard Cab) J21 A 35

D1637 (Standard Cab)

D2536 (Access Cab) J22 B 35

D1736 (Access Cab)

D2537 (Standard Cab) J23 A 35

D1737 (Standard Cab)

D2636 (Access Cab) J24 B 35

D18 36 (Access Cab)D26

37 (Standard Cab)P10

36 (Access Cab)

D19 36 (Access Cab) D28 34P10

37 (Standard Cab)

D20 36 (Access Cab) D30 34 T13 35

D21 36 (Access Cab) J3 35 U1 35

D2236 (Access Cab) J4 35

D2237 (Standard Cab) J5 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1E 22 (*2) Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1F

1H 22 (*2)Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J

( )Cowl Wire and Driver Side J/B (Lower Finish Panel)

1L 23 (*2)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IB344 Front Door LH Wire and Cowl Wire (Left Kick Panel)

IB444 Front Door LH Wire and Cowl Wire (Left Kick Panel)

IF346 Front Door RH Wire and Cowl Wire (Right Kick Panel)

IF446 Front Door RH Wire and Cowl Wire (Right Kick Panel)

BE2 48 (Access Cab) Floor No.2 Wire and Cowl Wire (Center of Left Rocker Panel)

BF2 48 (Access Cab) Floor No.1 Wire and Cowl Wire (Center of Right Rocker Panel)

BG2 48 (Access Cab) Floor No.2 Wire and Rear Door No.1 Wire LH (Under the Left Quarter Panel)

BH1 48 (Access Cab) Floor No.1 Wire and Rear Door No.1 Wire RH (Under the Right Quarter Panel)

: GROUND POINTS

Code See Page Ground Points Location

IE44 Left Kick Panel

IF44 Left Kick Panel

IH44 Right Kick Panel

II44 Right Kick Panel

BJ 48 (Access Cab) Inside of Rear Door LH

BK 48 (Access Cab) Inside of Rear Door RH

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

B348 (Access Cab)

Front Door LH WireB7 50 (Standard Cab) Front Door RH Wire

B350 (Standard Cab)

Front Door LH WireB8 48 (Access Cab) Rear Door No.1 Wire LH

B7 48 (Access Cab) Front Door RH Wire B9 48 (Access Cab) Rear Door No.1 Wire RH

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

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MEMO

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196

TVIP AND WIRELESS DOOR LOCK CONTROL

15ATAIL

2 3

1 5

2 2 2

1C6

1K5

10AHORN

AC

BA

B–L B

B–L B R

R

G–R

R–B

G–Y

G–R

R–B

G–Y

F A

AF

76

JUNCTIONCONNECTOR

J10

JUNCTIONCONNECTOR

BJ21 , J22AJUNCTIONCONNECTOR

J 7

BATTERY

( *2)

( *1)

( *2)

( *1)

H–LPRELAY

R–B

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

INTEGRATIONRELAY

* 3 : W/ DAYTIME RUNNING LIGHT

* 1 : TOWING PACKAGE* 2 : EXCEPT TOWING PACKAGE

* 6 : 5VZ–FE

* 4 : W/O DAYTIME RUNNING LIGHT* 5 : 2UZ–FE

1L1N

53 (*3)

(*4)1L1O

64 (*3)

(*4) 1L1N

134 (*3)

(*4) 1L1N

1212 (*3)

(*4)

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5AECU–B

30APOWER

5AECU IG

1G131C42

AC

BB

IA517

B13 A1 B11 A12 A11 A10

G–R

R–B

G–Y

HORN TAIL HEAD+B1+B2IG

G–R

R–B

G–Y

W–R

W–R

( *6)

W–G

( *5)

W–G

( *6)

B–R

W–R

W–G

W–G

W–R

W–R

W–G

JUN

CTI

ON

CO

NN

EC

TOR

BJ2

3A

, J2

4

( *6)( *

5)

( *5)

( *6)

( *5)

( *5)

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

TVIP ECU

BT11 , T12A C, T13

2

1

AD

ADJUN

CTI

ON

CO

NN

EC

TOR

J21

A

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TVIP AND WIRELESS DOOR LOCK CONTROL

2

1

IB38IB47

D22 2

31

DO

OR

KE

Y L

OC

K A

ND

UN

LOC

K S

W L

H

LOC

K

UN

LOC

K

UN

LOC

K

LOC

K

2 5

1

B 3

R–Y

R–Y

R–Y

L–R

W–G

W–G

W–B

CU

NLO

CK

WA

RN

ING

SW

U 1

W–B

W–B

DO

OR

LO

CK

CO

NTR

OL

SW

LH

[PO

WE

R W

IND

OW

MA

ST

ER

SW

]

P10

IB46

C R–Y

W–G

B6 B9A4B8 B10

KSW L2 UL3 UL1 UL2

B2 A2 A7 B18 B17 A6

IA43

IA47

AA AA

BA

AA AA

IE

INDMI–MI+EBZRLUG

L–R

L–R

W–G

P–B

L–WL

W–BV

LG–B

V

W–B

W–B

W–B

W–B

W–B

W–B

P–B

W–G

L–R

CBB CE

123

CBE

24311

SH

OR

T C

ON

NE

CTO

R( T

VIP

)

S 9

TVIP

BU

ZZE

RT1

0

SECURITY INDICATORAND GLASSBREAKAGE SENSORMICROPHONE

S10

JUN

CT

ION

CO

NN

EC

TO

R

BJ2

3,

J24

A

JUNCTIONCONNECTOR

J 7

B2

A7

COMBINATIONMETER

BC11 , C12A

W–G

R–W

(*4)

( *3)

C

TVIP ECU

BT11 , T12A C, T13

(*3)

JUN

CTI

ON

CO

NN

EC

TOR

J 4

R–Y

(*4)

( W/O

TV

IP)

( W/O

TV

IP)

( SH

ILE

DE

D)

BA BA

W–B

W–B

W–B

W–B

Y–B

W–B

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IF47

DO

OR

KE

Y L

OC

K A

ND

UN

LOC

K S

W R

H

D23

UN

LOC

K

LOC

K

DO

OR

LO

CK

CO

NTR

OL

SW

RH

6 5

3D24

B 7 B 7

A

II

IF31

4 2

1 3

M

4 2

1 3

M

B 3IB34 IF34

IB31

IB33 IB35 IF33 IF35

W–G

R–Y

W–G

R–Y

W–B

W–B

W–B

W–B

W–B

W–B

L–W

L–Y

L–W

R–L

L–Y

L–W

L–W

R–L

W–B

B–Y

B–Y

W–B

B–Y

W–B

B–Y

UN

LOC

K

LOC

K

1 3

2

L–Y

JUNCTIONCONNECTOR

J13

DO

OR

LO

CK

MO

TOR

AN

D D

OO

R U

NLO

CK

DE

TEC

TIO

N S

W L

H

D25

DO

OR

LO

CK

MO

TOR

AN

D D

OO

R U

NLO

CK

DE

TEC

TIO

N S

W R

H

D26

IF38

R–Y

IF46

B14 B15 C2C4

AF

BD

LSWD LSWP ACT– ACT+

W–G

R–W

(*4)

A

A

R–W

JUNCTIONCONNECTOR

J 4BE

AE

A

DAD

JUNCTIONCONNECTOR

J 7

R–L

JUNCTIONCONNECTOR

BJ21 , J22A

JUN

CTI

ON

CO

NN

EC

TOR

BJ2

1A

, J2

2

B–Y

B–Y

B–Y

TVIP ECU

BT11 , T12A C, T13

(*3)

1 2 AR–Y

(*4)

R–W

(*4)D30DIODE (UNLOCK)

* 4 : W/O DAYTIME RUNNING LIGHT* 3 : W/ DAYTIME RUNNING LIGHT

W–B

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TVIP AND WIRELESS DOOR LOCK CONTROL

E

BE25

BG24

1

C

C

BF25

BH14

B 9

1

2

1

2

1

B 8

BJ

L

E CE

JUNCTIONCONNECTOR

J 4JUNCTIONCONNECTOR

J 5

L

B–W

B–W

B–W

B–W

W–B

W–B

DO

OR

CO

UR

TES

YS

W F

RO

NT

LH

D16

DO

OR

CO

UR

TES

YS

W R

EA

R L

H U

PP

ER

D19

DO

OR

CO

UR

TES

YS

W R

EA

R L

H L

OW

ER

D18

DO

OR

CO

UR

TES

YS

W F

RO

NT

RH

D17

( *8)

( *8)

( *8)

( *8)

( *8)

( *8)

( *8)

B–W ( *8)

B–W ( *8)

( *8)L

L ( *8)

( *7)

B–WL ( *7)

2

1

2

1

B 9

BK

B–W

B–W

W–B

W–B

DO

OR

CO

UR

TES

YS

W R

EA

R R

H U

PP

ER

D21

DO

OR

CO

UR

TES

YS

W R

EA

R R

H L

OW

ER

D20

B–W

( *8)

( *8)

( *8)

( *8)

(* 8)

B5B4

BE25

BG24

B–W

B–W

( *8)

( *8)

B–W

(*8)

C

1

2

B

B–L

B–L

B

B–W

DIODE(POWER WINDOW SYSTEM)

D11

CTYDSWD DMLP

6 C

B–W

B–W

TVIP ECU

BT11 , T12A C, T13

C8 C3 B12

SRLY ST A

CUT OFF

GR

FROM ST RELAY

TO PARK/NEUTRAL POSITION SW (A/T)TO CLUTCH START SW OR CLUTCHSTART CANCEL SW (M/T)

G–RP

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10ADOME

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

2

1A3

1E6

1

2O

FF

ON

DO

OR

B 4

B 4

IC12

1

2

AB AB

BB

1B9

1H1

B–L

B

B–W

B–W

L–Y

L–YL–Y

L–Y

L–Y

L–Y

B–W

B–W

B–W

B

B

B

B

JUNCTIONCONNECTOR

J 4DIODE(TVIP)

D29

INTE

RIO

R L

IGH

TI2

6

PE

RS

ON

AL

LIG

HT

P 8

3

2 1

1A2

1J8

IF

JUNCTIONCONNECTOR

BJ21 , J22A

2

1

W–B

W–B

A

JUNCTIONCONNECTOR

J 3

B

B–W

B–W

* 8 : ACCESS CAB* 7 : STANDARD CAB

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2003 TOYOTA TUNDRA (EWD491U)

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TVIP AND WIRELESS DOOR LOCK CONTROL

T11 (A), T12 (B), T13 (C) TVIP ECU(B) 3–GROUND : Approx. 12 volts with the ignition SW at ON position

(A) 1, (B) 11–GROUND : Always approx. 12 volts(A) 7–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

C11 A 34 D24 37 (Standard Cab) J22 B 35

C12 B 34D25

36 (Access Cab) J23 A 35

D11 34D25

37 (Standard Cab) J24 B 35

D1636 (Access Cab)

D2636 (Access Cab)

P836 (Access Cab)

D1637 (Standard Cab)

D2637 (Standard Cab)

P837 (Standard Cab)

D1736 (Access Cab) D29 34

P1036 (Access Cab)

D1737 (Standard Cab) D30 34

P1037 (Standard Cab)

D18 36 (Access Cab)I26

36 (Access Cab) S9 35

D19 36 (Access Cab)I26

37 (Standard Cab) S10 35

D20 36 (Access Cab) J3 35T10

31 (2UZ–FE)

D21 36 (Access Cab) J4 35T10

33 (5VZ–FE)

D2236 (Access Cab) J5 35 T11 A 35

D2237 (Standard Cab) J7 35 T12 B 35

D2336 (Access Cab) J10 35 T13 C 35

D2337 (Standard Cab) J13 35 U1 35

D24 36 (Access Cab) J21 A 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1A22 (*2)

Roof Wire and Driver Side J/B (Lower Finish Panel)1A26 (*1)

Roof Wire and Driver Side J/B (Lower Finish Panel)

1B22 (*2)

1B26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1C22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1C26 (*1)

1E22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1E26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1G22 (*2)

1G26 (*1)

1H22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1H26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2)

1J26 (*1)

1K22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1K26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1L 23 (*2)

1N27 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1O27 (*1)

( )

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA444 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IA544 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IB344 Front Door LH Wire and Cowl Wire (Left Kick Panel)

IB444 Front Door LH Wire and Cowl Wire (Left Kick Panel)

IC1 44 Cowl Wire and Roof Wire (Left Side of Instrument Panel)

IF346 Front Door RH Wire and Cowl Wire (Right Kick Panel)

IF446 Front Door RH Wire and Cowl Wire (Right Kick Panel)

BE2 48 (Access Cab) Floor No.2 Wire and Cowl Wire (Center of Left Rocker Panel)

BF2 48 (Access Cab) Floor No.1 Wire and Cowl Wire (Center of Right Rocker Panel)

BG2 48 (Access Cab) Floor No.2 Wire and Rear Door No.1 Wire LH (Under the Left Quarter Panel)

BH1 48 (Access Cab) Floor No.1 Wire and Rear Door No.1 Wire RH (Under the Right Quarter Panel)

: GROUND POINTS

Code See Page Ground Points Location

IE44 Left Kick Panel

IF44 Left Kick Panel

II 44 Right Kick Panel

BJ 48 (Access Cab) Inside of Rear Door LH

BK 48 (Access Cab) Inside of Rear Door RH

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

B348 (Access Cab)

Front Door LH Wire B748 (Access Cab)

Front Door RH WireB350 (Standard Cab)

Front Door LH Wire B750 (Standard Cab)

Front Door RH Wire

B448 (Access Cab)

Roof WireB8 48 (Access Cab) Rear Door No.1 Wire LH

B450 (Standard Cab)

Roof WireB9 48 (Access Cab) Rear Door No.1 Wire RH

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POWER WINDOW

5AECU IG

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

30APOWER

2 3

1 59 3 2

1

8

2

1H7 1H6 1C2

1C

1

1J8

POWERRELAY

INTEGRATIONRELAY

BE25

BG24

B 8

2

1

2

11

BJ

C

C

BF25

BH14

B 9 B 9

2

1

2

1 1

BK

L

B–W

L

B–W

B–W

B–W

B–W

B–W

B–W

W–B

W–B

W–B

W–B

B–W

( *2)

L L

B–W

L

B–W

B–W

W–BL

B–W

L–R

L–R

DO

OR

CO

UR

TES

Y S

WR

EA

R L

H U

PP

ER

D19

DO

OR

CO

UR

TES

Y S

WR

EA

R L

H L

OW

ER

D18

DO

OR

CO

UR

TES

Y S

WF

RO

NT

LH

D16

DO

OR

CO

UR

TES

Y S

WR

EA

R R

H U

PP

ER

D21

DO

OR

CO

UR

TES

Y S

WR

EA

R R

H L

OW

ER

D20

DO

OR

CO

UR

TES

Y S

WF

RO

NT

RH

D17

A

IF

14 15

(*1)

( *1)

( *2)

( *2)

( *2)

( *2)

( *2)

( *2)

( *2)

( *2)

( *2)

(* 2)

( *1)

( *1)

( *2)

( *2)

( *2)

( *2)

C

JUN

CT

ION

CO

NN

EC

TO

R

J 5

E

E

L

E

JUN

CT

ION

CO

NN

EC

TO

R

J 4

A

B–W

B–W

B–W

5 BG2

4 BE2

C

(*2)

( *2)

( *2)

M1 2

BF21 BF24

BC

AAAA

IB43

L–R

( *4)

L–R

( *4)

L–R

1

JUNCTIONCONNECTOR

BJ21 , J22A

POWER WINDOW SW(BACK WINDOW)

P21

L–R

(*3)

POWER WINDOW MOTOR(BACK WINDOW)

P22

3 6 2

OPN CLS E1

G–B

R–L

G–B

R–L

JUN

CTI

ON

CO

NN

EC

TOR

J 3

W–B

( *2)

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IF43IB31

L–R

L–R

IC

IB42

IF42

8

R–B

R–B

IB41

IF41

10

R–W

R–W

5 2

1 2

3 1

LG L–Y

POWER WINDOWMOTOR FRONT RH

P12

R–B

R–W

4

L–R

W–B

W–B

1

UP DOWN

UP

DO

WN

WIN

DO

WLO

CK

SW

L–R

9 POWER WINDOW MASTER SWP10

2 1

3 4

POWER WINDOWMOTOR FRONT LH

P11

LG L–Y

PO

WE

R W

IND

OW

CO

NT

RO

L S

W R

H

P 9

* 1 : STANDARD CAB* 2 : ACCESS CAB

L–R

UP

DO

WN

UP

DO

WN

M

M

BA

AA

IE

W–B

JUNCTIONCONNECTOR

BJ23 , J24A

* 3 : 5VZ–FE W/O DAYTIME RUNNING LIGHT M/T* 4 : EXCEPT *3

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POWER WINDOW

With the ignition SW turned on, current flows through the ECU IG fuse to TERMINAL 9 of the integration relay to TERMINAL2 to TERMINAL 1 of the power relay to TERMINAL 2 to GROUND, activating the power relay, and the current flowing fromTERMINAL 5 of the power relay flows to TERMINAL 3 to TERMINAL 9 of the power window master SW and TERMINAL 4 ofthe power window control SW RH.

1. MANUAL OPERATION (DRIVER’S WINDOW)With the ignition SW turned on and with the power window master SW (Manual SW) in UP position, the current flowing toTERMINAL 9 of the power window master SW flows to TERMINAL 3 to TERMINAL 2 of the power window motor LH toTERMINAL 1 to TERMINAL 4 of the master SW to TERMINAL 1 to GROUND and causes the power window motor to rotatein the up direction. The window ascends only while the SW is being pushed.In down operation, the current flowing from TERMINAL 9 of the power window master SW to TERMINAL 4 flows toTERMINAL 1 of the motor LH to TERMINAL 2 to TERMINAL 3 of the master SW to TERMINAL 1 to GROUND, flowing in theopposite direction to manual up operation, causing the motor to rotate in reverse and lowering the window.

2. AUTO DOWN OPERATION (DRIVER’S WINDOW)With the ignition SW on and with the auto SW of the power window master SW in DOWN position, the current flowing toTERMINAL 9 of the master SW flows to TERMINAL 4 of the master SW to TERMINAL 1 of the power window motor LH toTERMINAL 2 to TERMINAL 3 of the master SW to TERMINAL 1 to GROUND, causing the motor to rotate towards the downside.Then the solenoid in the master SW is activated and it locks the auto SW being pushed, causing the motor to continue torotate in auto down operation.When the window has completely descended, the current flowing between TERMINAL 3 of the master SW and TERMINAL 1increases. As a result, the solenoid stops operating, the auto SW turns off and the flowing from TERMINAL 9 of the masterSW to TERMINAL 4 is cut off, stopping the motor so that auto stop occurs.

3. STOPPING OF AUTO DOWN AT DRIVER’S WINDOWWhen the manual SW (Driver’s) is pushed to the up side during auto down operation, a ground circuit opens in the masterSW and current does not flow from TERMINAL 3 of the master SW to TERMINAL 1, so the motor stops, causing auto downoperation to stop. If the manual SW is pushed continuously, the motor rotates in the up direction in manual up operation.

4. MANUAL OPERATION BY POWER WINDOW CONTROL SW (PASSENGER’S WINDOW)With the power window control SW RH is pushed to the up side, the current flowing from TERMINAL 4 of the power windowcontrol SW RH flows to TERMINAL 3 of the power window control SW RH to TERMINAL 1 of the power window motor RH toTERMINAL 2 to TERMINAL 1 of the power window control SW RH to TERMINAL 2 to TERMINAL 10 of the master SW toTERMINAL 1 to GROUND. This causes the power window motor RH to rotate in the up direction. Up operation is continuousonly while the power window control SW RH is pushed to the up side. When the window descends, the current flowing to themotor flows in the opposite direction, from TERMINAL 1 to TERMINAL 2, and the motor rotates in revers.When the window lock SW is pushed to the lock side, the ground circuit to the passenger’s window becomes open. As aresult, even if Open/Close operation of the passenger’s window is tried, the current from TERMINAL 9 of the power windowmaster SW is not grounded and the motor does not rotate, so the passenger’s window can not be operated and window lockoccurs.

5. KEY OFF POWER WINDOW OPERATIONWith the ignition SW turned from on to off, the integration relay operates for about 43 seconds and current flows fromTERMINAL 1 of the power relay to TERMINAL 2 to GROUND. For this period, current also flows TERMINAL 5 to TERMINAL3. This current flows to TERMINAL 9 of the power window master SW and to TERMINAL 4 of the power window control SWRH. As a result, for about 43 seconds after the ignition SW is turned off, it is possible to raise and lower the power window bythe functioning of the integration relay. Also, by opening the door (Door courtesy SW on) within about 43 seconds afterturning the ignition SW to off, a signal is input to TERMINAL 3, 14 or 15 of the integration relay. As a result, the integrationrelay turns off, and up and down movement of the window stops.

SYSTEM OUTLINE

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D16, D17 DOOR COURTESY SW LH, RH1–GROUND : Continuity with door open

INTEGRATION RELAY9–GROUND : Approx. 12 volts with ignition SW at ON position3–GROUND : Always approx. 12 volts

14–GROUND : Continuity with front LH door open15–GROUND : Continuity with front RH door open (Standard cab)15–GROUND : Continuity with front RH, rear LH, RH door open (Access cab)

P9 POWER WINDOW CONTROL SW RH4–GROUND : Approx. 12 volts with ignition SW on and stays at 12 volts for 41.5 –44.5 seconds after the ignition SW is turned

off, but if a door is open in the 45 seconds period, voltage will drop to 0 volts

P10 POWER WINDOW MASTER SW1–GROUND : Always continuity9–GROUND : Approx. 12 volts with ignition SW on and stays at 12 volts for 41.5 –44.5 seconds after the ignition SW is turned

off, but if a door is opened in this 41.5 –44.5 seconds period, voltage will drop to 0 volts3–GROUND : Approx. 12 volts with ignition SW at ON position and master SW at UP position4–GROUND : Approx. 12 volts with ignition SW at ON position and master SW at DOWN or AUTO DOWN position

WINDOW LOCK SWOpen with window lock SW at LOCK position

: PARTS LOCATION

Code See Page Code See Page Code See Page

D1636 (Access Cab) J4 35 P10 37 (Standard Cab)

D1637 (Standard Cab) J5 35

P1136 (Access Cab)

D1736 (Access Cab) J21 A 35

P1137 (Standard Cab)

D1737 (Standard Cab) J22 B 35

P1236 (Access Cab)

D18 36 (Access Cab) J23 A 35P12

37 (Standard Cab)

D19 36 (Access Cab) J24 B 35 P21 35

D20 36 (Access Cab)P9

36 (Access Cab) P22 36 (Access Cab)

D21 36 (Access Cab)P9

37 (Standard Cab)

J3 35 P10 36 (Access Cab)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1C22 (*2)

1C26 (*1)

1H22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1H26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2)

1J26 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IB344 Front Door LH Wire and Cowl Wire (Left Kick Panel)

IB444 Front Door LH Wire and Cowl Wire (Left Kick Panel)

IF4 46 Front Door RH Wire and Cowl Wire (Right Kick Panel)

BE2 48 (Access Cab) Floor No.2 Wire and Cowl Wire (Center of Left Rocker Panel)

BF2 48 (Access Cab) Floor No.1 Wire and Cowl Wire (Center of Right Rocker Panel)

BG2 48 (Access Cab) Floor No.2 Wire and Rear Door No.1 Wire LH (Under the Left Quarter Panel)

BH1 48 (Access Cab) Floor No.1 Wire and Rear Door No.1 Wire RH (Under the Right Quarter Panel)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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POWER WINDOW

: GROUND POINTS

Code See Page Ground Points Location

IE44 Left Kick Panel

IF44 Left Kick Panel

BJ 48 (Access Cab) Inside of Rear Door LH

BK 48 (Access Cab) Inside of Rear Door RH

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

B8 48 (Access Cab) Rear Door No.1 Wire LH B9 48 (Access Cab) Rear Door No.1 Wire RH

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MEMO

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KEY REMINDER AND SEAT BELT WARNING

10ADOME

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

2

10AGAUGE

1F5

1E6

1F3

A7

2

1

B2 C1

BI13

B12

BI14

C

IH

B8 B13

1

BG24

BE25

E

B

P–B

Y–B

W–B

BW

–B

BR

L ( *2)

L ( *2)

L ( *2)

E

UN

LOC

KW

AR

NIN

G S

W

U 1

DO

OR

CO

UR

TES

YS

W F

RO

NT

LH

D16

A9B5

L–Y

L–Y

B–Y

B2 (*4)A1 (*3)

A2 (*3)

B1 (*4)

C11

COMBINATION METER

BA , C12

* 2 : ACCESS CAB* 1 : STANDARD CAB

* 4 : BENCH SEAT* 3 : W/ POWER SEAT

P–B

2

SE

AT

BE

LT

E

E

JUN

CTI

ON

CO

NN

EC

TOR

J 7

C

C13, C

1

BR

E L

(*1)

L

JUN

CT

ION

CO

NN

EC

TO

R

J 8

JUN

CTI

ON

CO

NN

EC

TOR

J 4

BR

BB

7,

A

BU

CK

LE S

W L

H

B

B

JUN

CTI

ON

CO

NN

EC

TOR

J10

B

* 5 : SEPARATE SEAT, CAPTAIN SEAT (W/O POWER SEAT)

( *3,

*4)

( *3,

*4)

( *3,

*4)

C3

C4

B 7

C

BU

CK

LE S

W L

H

W–B

(*3, *4)

B ( *5)

( *5)

W–B

* 6 : W/ DOOR LOCK CONTROL* 7 : W/O DOOR LOCK CONTROL

L

(*1)

IE

BA

AA

JUNCTIONCONNECTOR

BJ23 , J24A

W–B

P–B ( *7)

( *6)

( *6)

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Current always flows to TERMINAL (B) 5 of the combination meter through the DOME fuse.

1. SEAT BELT WARNING SYSTEMWhen the ignition SW is turned on, current flows from the GAUGE fuse to TERMINAL (A) 9 of the combination meter. Thiscurrent activates the combination meter and the current flowing through the seat belt warning light flows from TERMINAL (B)8 to GROUND, causing the warning light to light up. A buckle SW off signal is input to TERMINAL (B) 12 of the combinationmeter to TERMINAL (B) 8 to GROUND, causing the warning light to light up. A buckle SW off signal is input to TERMINAL(B) 12 of the combination meter, the current flowing to TERMINAL (B) 5 of the combination meter flows from TERMINAL (B)8 to GROUND and the seat belt warning buzzer sounds. However, if the seat belt is put on during this period (While thebuzzer is sounding), signal input to TERMINAL (B) 12 of the combination meter stops and the current flow from TERMINAL(B) 5 of the combination meter to TERMINAL (B) 8 to GROUND is cut, causing the buzzer to stop.

2. KEY REMINDER SYSTEMWith the ignition key inserted in the key cylinder (Unlock warning SW on), the ignition SW still off and driver’s door open(Door courtesy SW on), when a signal is input to TERMINAL (B) 13 of the combination meter, the combination meteroperates, current flows from TERMINAL (B) 5 of the combination meter to TERMINAL (B) 8 to GROUND and key reminderbuzzer sounds.

B7 (A), (B) BUCKLE SW LH(A) 1–(A) 2, (B) 2–(B) 1 : Closed with driver’s seat belt in use

D16 DOOR COURTESY SW FRONT LH1–GROUND : Closed with front LH door open

U1 UNLOCK WARNING SW1–2 : Closed with ignition key in cylinder

C11 (A), C12 (B), C13 (C) COMBINATION METER(A) 7, (B) 8–GROUND : Always continuity(B)13–GROUND : Continuity with the front LH door open(C) 1–GROUND : Continuity with the ignition key in cylinder(B)12–GROUND : Continuity with the driver’s seat belt in use(B) 5–GROUND : Always approx. 12 volts(A) 9–GROUND : Approx. 12 volts withe ignition SW at ON or ST position

: PARTS LOCATION

Code See Page Code See Page Code See Page

A 38 (w/ Power Seat) C12 B 34 J8 35

B36 (Access Cab *3) C13 C 34 J10 35

B7B

37 (Standard Cab *3)D16

36 (Access Cab) J23 A 35

C36 (Access Cab *4)

D1637 (Standard Cab) J24 B 35

C37 (Standard Cab *4) J4 35 U1 35

C11 A 34 J7 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1E22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1E26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1F22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SYSTEM OUTLINE

SERVICE HINTS

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KEY REMINDER AND SEAT BELT WARNING

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

BE2 48 (Access Cab) Floor No.2 Wire and Cowl Wire (Center of Left Rocker Panel)

BG2 48 (Access Cab) Floor No.2 Wire and Rear Door No.1 Wire LH (Under the Left Quarter Panel)

48 (Access Cab)

BI1 50 (Standard Cab) Cowl Wire and Seat No.1 Wire (Under the Driver’s Seat)

52

( )

: GROUND POINTS

Code See Page Ground Points Location

IE 44 Left Kick Panel

IH 44 Right Kick Panel

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MEMO

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CIGARETTE LIGHTER AND POWER OUTLET

15AACC

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1G6 1G12

IA416

2

3 1

5 2

2

15APWROUTLET2

2

15APWROUTLET1

2

IA42 IA510

1

2

1

2

I 2

2 2

2

ID21ID11

1

2

ID12ID22

A

IF

J 3JUNCTIONCONNECTOR

EA

W–B

W–B

(* 1)(*2)

(*1)(*2)

W–B

GR

W–B

B

2

GR

GR

GR

1

140A

ALT

(*3

)10

0A A

LT (

*4)

PO

WE

R O

UTL

ET

RE

LAY

B

G

G–B

G

G–B

W–B

W–B

W–B

BA

TTE

RY

* 2 : W/O CIGARETTE LIGHTER ILLUMINATION* 1 : W/ CIGARETTE LIGHTER ILLUMINATION

CIGARETTELIGHTER

C 7POWEROUTLET

P 6POWEROUTLET

P 7

2

1

2

1

I 2

W–B

W–B

* 3 : TOWING PACKAGE* 4 : EXCEPT TOWING PACKAGE

B ( *4)

B–L

( *3)

B–L

(*3)B

(*4)

A

A

JUN

CTI

ON

CO

NN

EC

TOR

J18

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C7 CIGARETTE LIGHTER2–GROUND : Approx. 12 volts with ignition SW at ON or ACC position1–GROUND : Always continuity

P6, P7 POWER OUTLET2–GROUND : Approx. 12 volts with the ignition SW at ON or ACC position1–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

C7 34J18

31 (2UZ–FE) P6 35

J3 35J18

33 (5VZ–FE) P7 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1G22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1G26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA444 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IA544 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

ID146 Cigarette Lighter Wire and Cowl Wire (Instrument Panel Brace LH)

ID246 Cigarette Lighter Wire and Cowl Wire (Instrument Panel Brace LH)

: GROUND POINTS

Code See Page Ground Points Location

EA40 (2UZ–FE)

Front Left FenderEA42 (5VZ–FE)

Front Left Fender

IF 44 Left Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I2 46 Cowl Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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CLOCK

15ATAIL

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1G4

15AACC

1G10

10ADOME

2

4

6

1E6

1F4

E

E

B5 B13

A7

A

II

J13JUNCTIONCONNECTOR

GG

L–Y

GR

L–Y

INTEGRATIONRELAY

JUNCTIONCONNECTOR

J10

L–Y

G

2

1

B1

W–B

W–B

INTEGRATION CONTROLAND PANEL

B ACC

ILL+ GND

GR

BI24 A , I25

AB

BC

JUNCTIONCONNECTOR

BJ23 , J24A

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I24 (A), I25 (B) INTEGRATION CONTROL AND PANEL(B) 5–GROUND : Always approx. 12 volts (Power for clock)(B)13–GROUND : Approx. 12 volts with ignition SW at ON or ACC position (Power for indication)(A) 7–GROUND : Approx. 12 volts with light control SW at TAIL or HEAD position (Signal of indication)(B) 1–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

I24 A 35 J10 35 J23 A 35

I25 B 35 J13 35 J24 B 35

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1E22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1E26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1F22 (*2)

1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1G22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1G26 (*1)

: GROUND POINTS

Code See Page Ground Points Location

II 44 Right Kick Panel

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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HORN

10AHORN

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1E8

6

1 1

B

G–R

1

B

HORN SW[COMB. SW]

C16

HORN RHH 8

HORN LHH 7

7

(*3)

A

A

JUNCTIONCONNECTOR

J10

G–R

(*1)

* 1 : 5VZ–FE W/ DOOR LOCK CONTROL, 2UZ–FE* 2 : 5VZ–FE W/O DOOR LOCK CONTROL W/ DAYTIME RUNNING LIGHT* 3 : 5VZ–FE W/O DOOR LOCK CONTROL W/O DAYTIME RUNNING LIGHT* 4 : 5VZ–FE W/ DOOR LOCK CONTROL W/ DAYTIME RUNNING LIGHT,

2UZ–FE W/ DAYTIME RUNNING LIGHT* 5 : 5VZ–FE W/ DOOR LOCK CONTROL W/O DAYTIME RUNNING LIGHT,

2UZ–FE W/O DAYTIME RUNNING LIGHT

INTEGRATIONRELAY

1L1N

1212 (*2, *4)

(*5)

G–R

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C16 HORN SW [COMB. SW]6–GROUND : Continuity with horn SW on

: PARTS LOCATION

Code See Page Code See Page Code See Page

C16 34 H7 32 (5VZ–FE) H8 32 (5VZ–FE)

H7 30 (2UZ–FE) H8 30 (2UZ–FE) J10 35

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1E22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1E26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1L 23 (*2)Cowl Wire and Driver Side J/B (Lower Finish Panel)

1N 27 (*1)Cowl Wire and Driver Side J/B (Lower Finish Panel)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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WIPER AND WASHER (w/ INT TIME SW MECHANISM)

POWER SOURCE SYSTEM (SEE PAGE 56)

1F51G21E31G3

9

1

EA

IA423

II

L

L L

LG–R

LG–R

W–B

L–R

L–R

W–B

W–B

L Y–L

L–B

L–W

W–B

L–R

W–B

L–WL

L–B

Y–L

L–R

L

17 8 7 16 2 11

3 5 2 1 4

OFF

INT

LOW

WASHER

HIGH

M

+2 +1 B S E

WIPER AND WASHER SW[COMB. SW]C17

WIP

ER

RE

LAY

WA

SH

ER

LE

VE

LW

AR

NIN

G L

IGH

T[C

OM

B.

ME

TER

]

C11

WIPER MOTORW 4

JUNCTIONCONNECTOR

J13A

IF

JUNCTIONCONNECTOR

J 3A

20AWIP

10AGAUGE

M

B–Y

IA410

2

1

WA

SH

ER

LE

VE

L S

EN

SO

R[W

AS

HE

R M

OT

OR

]

W 2

4

3

WA

SH

ER

MO

TOR

W 2

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With the ignition SW turned on, current flows to TERMINAL 17 of the wiper and washer SW, TERMINAL 3 of the washermotor and TERMINAL 2 of the wiper motor through the WIP fuse.

1. LOW SPEED POSITIONWith wiper SW turned to LOW position, current flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 7 toTERMINAL 5 of the wiper motor to TERMINAL 4 to GROUND and causes the wiper motor to run at low speed.

2. HIGH SPEED POSITIONWith wiper SW turned to HIGH position, current flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 8 toTERMINAL 3 of the wiper motor to TERMINAL 4 to GROUND and causes the motor to run at high speed.

3. INT POSITIONWith wiper SW turned to INT position, the relay operates and the current which is connected by relay function flows fromTERMINAL 17 of the wiper and washer SW to TERMINAL 2 to GROUND. This flowing the intermittent circuit and currentflows from TERMINAL 17 of the wiper and washer SW to TERMINAL 7 to TERMINAL 5 of the wiper motor to TERMINAL 4 toGROUND and the wiper functions.The intermittent operation is controlled by charging and discharging of the condenser installed in the relay and theintermittent time is controlled by a time control SW to change the charging time of the condenser.

4. WASHER INTERLOCKING OPERATIONWith the washer SW turned to on, current flows from TERMINAL 3 of the washer motor to TERMINAL 4 to TERMINAL 11 ofthe wiper and washer SW to TERMINAL 2 to GROUND and causes to the washer motor to run, and the window washer isjetted.This causes current to flow to washer continuous operation circuit in TERMINAL 17 of the wiper and washer SW toTERMINAL 7 to TERMINAL 5 of the wiper motor to TERMINAL 4 to GROUND and the wiper functions.

C17 WIPER AND WASHER SW [COMB. SW]2–GROUND : Always continuity

17–GROUND : Approx. 12 volts with ignition SW at ON position7–GROUND : Approx. 12 volts with wiper and washer SW at LOW position

Approx. 12 volts every approx. 1.6 to 10.7 seconds intermittently with wiper SW at INT position16–GROUND : Approx. 12 volts with ignition SW on unless wiper motor at STOP position

8–GROUND : Approx. 12 volts with ignition SW on and wiper and washer SW at HIGH position11–2 : Continuity with washer SW on

W4 WIPER MOTOR1–2 : Closed unless wiper motor at STOP position

: PARTS LOCATION

Code See Page Code See Page Code See Page

C11 34 J13 35W4

31 (2UZ–FE)

C17 34W2

31 (2UZ–FE)W4

33 (5VZ–FE)

J3 35W2

33 (5VZ–FE)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1E22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1E26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1F22 (*2)

1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1G22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1G26 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA4 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SYSTEM OUTLINE

SERVICE HINTS

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WIPER AND WASHER (w/ INT TIME SW MECHANISM)

: GROUND POINTS

Code See Page Ground Points Location

EA40 (2UZ–FE)

Front Left FenderEA42 (5VZ–FE)

Front Left Fender

IF 44 Left Kick Panel

II 44 Right Kick Panel

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MEMO

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WIPER AND WASHER (w/o INT TIME SW MECHANISM)

POWER SOURCE SYSTEM (SEE PAGE 56)

1F51G21E31G3

9

1

EA

IA423

II

L

L L

B–Y

LG–R

LG–R

W–B

L–R

L–R

W–B

W–B

L

Y–L

L–B

L–W

W–B

L–R

W–B

L–WL

L–B

Y–L

L–R

L

W–B

17 8 7 16 2 11

3 5 2 1 4

M

+2 +1 B S E

WIPER AND WASHER SW[COMB. SW]C17

WA

SH

ER

LE

VE

LW

AR

NIN

G L

IGH

T[C

OM

B.

ME

TER

]

C11

WIPER MOTORW 4

JUNCTIONCONNECTOR

J13A

IF

JUNCTIONCONNECTOR

J 3A

20AWIP

10AGAUGE

MIST

OFF

LO

HIGH

WASHER

M

4

3

IA410

2

1

WA

SH

ER

LE

VE

L S

EN

SO

R[W

AS

HE

R M

OT

OR

]

W 2

WA

SH

ER

MO

TOR

W 2

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With the ignition SW turned on, current flows to TERMINAL 17 of the wiper and washer SW, TERMINAL 3 of the washermotor and TERMINAL 2 of the wiper motor through the WIP fuse.

1. LOW SPEED POSITIONWith wiper SW turned to LOW position, current flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 7 toTERMINAL 5 of the wiper motor to TERMINAL 4 to GROUND and causes the wiper motor to run at low speed.

2. HIGH SPEED POSITIONWith wiper SW turned to HIGH position, current flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 8 toTERMINAL 3 of the wiper motor to TERMINAL 4 to GROUND and causes the motor to run at high speed.

3. MIST POSITIONWith the wiper SW turned to MIST position, current flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 7 toTERMINAL 5 of the wiper motor to TERMINAL 4 to GROUND and causes the wiper motor to run at low speed.

4. WASHER INTERLOCKING OPERATIONWith the washer SW turned to on, current flows from TERMINAL 3 of the washer motor to TERMINAL 4 to TERMINAL 11 ofthe wiper and washer SW to TERMINAL 2 to GROUND and causes to the washer motor to run, and the window washer isjetted.

C17 WIPER AND WASHER SW [COMB. SW]2–GROUND : Always continuity

17–GROUND : Approx. 12 volts with ignition SW at ON position7–GROUND : Approx. 12 volts with wiper and washer SW at LOW or MIST position

16–GROUND : Approx. 12 volts with ignition SW on unless wiper motor at STOP position8–GROUND : Approx. 12 volts with ignition SW on and wiper and washer SW at HIGH position

11–GROUND : Continuity with washer SW on

W4 WIPER MOTOR1–2 : Closed unless wiper motor at STOP position

: PARTS LOCATION

Code See Page Code See Page Code See Page

C11 34 J13 35W4

31 (2UZ–FE)

C17 34W2

31 (2UZ–FE)W4

33 (5VZ–FE)

J3 35W2

33 (5VZ–FE)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1E22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1E26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1F22 (*2)

1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1G22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1G26 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA4 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

: GROUND POINTS

Code See Page Ground Points Location

EA40 (2UZ–FE)

Front Left FenderEA42 (5VZ–FE)

Front Left Fender

IF 44 Left Kick Panel

II 44 Right Kick Panel

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SYSTEM OUTLINE

SERVICE HINTS

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MIRROR HEATER

15AMIR HTR

2

1

2

10AGAUGE

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1F9

IE

BA BA

AA

E

2

E

4

E

1 5

2 3

22

2 2

IA516

IA425 IB36 IF36

6

2

6

2

IB31 IF31

II

A

IA411

6

D

D D

JUNCTIONCONNECTOR

BJ23 , J24A

B–Y

P–G

B–Y

R–W

B–Y

R–W

R–W

R–W

B–Y

R–W

R–W

R–W

W–B

W–B

R–WW

P–G

W–B

W–B

W–B

W–B

W–B

MIRROR HEATER SWM 4

JUNCTIONCONNECTOR

J13

JUNCTIONCONNECTOR

J11

MIR

RO

R H

EA

TER

LH

[RE

MO

TE C

ON

TRO

L M

IRR

OR

LH

]

R 8

MIR

RO

R H

EA

TER

RH

[RE

MO

TE C

ON

TRO

L M

IRR

OR

RH

]

R 9

JUN

CTI

ON

CO

NN

EC

TOR

J 8

E D

IGMIR HTRRELAY

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MIR HTR RELAY5–3 : Closed with the ignition SW on and the mirror heater SW on

M2 MIRROR HEATER SW2–GROUND : Approx. 12 volts with the ignition SW on4–GROUND : Always continuity

R8, R9 MIRROR HEATER LH, RH [REMOTE CONTROL MIRROR LH, RH]2–GROUND : Approx. 12 volts with the ignition SW on and the mirror heater SW on6–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

J8 35 J24 B 35R9

36 (Access Cab)

J11 35 M4 35R9

37 (Standard Cab)

J13 35R8

36 (Access Cab)

J23 A 35R8

37 (Standard Cab)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1F22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA444 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IA544 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IB3 44 Front Door LH Wire and Cowl Wire (Left Kick Panel)

IF3 46 Front Door RH Wire and Cowl Wire (Right Kick Panel)

: GROUND POINTS

Code See Page Ground Points Location

IE 44 Left Kick Panel

II 44 Right Kick Panel

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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REMOTE CONTROL MIRROR

15AACC

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

1G11

A

A

IB37

GR

GR

(A/T)

(A/T)

GR

( M/T

)

M M M M

IB311 IB310 IB312 IB31

IF311 IF310 IF312

B 2

IE

LG–R

L–B

Y–B

LG–R

L–B

Y–B

W–B

Y–BR

P–G

5 2 4 3 6 7

R L–B

P–G

LG–R

Y–B

W–B

L–B

P–G

Y–B

Y–B

OP

ER

ATI

ON

SW

SE

LEC

T S

W

DO

WN

/R

IGH

T

UP

/LE

FT

LH RH LH RH

LEF

T

RIG

HT

UP

DO

WN

GR

REMOTE CONTROLMIRROR SW

R10

8

JUNCTIONCONNECTOR

J 9

* 1 : W/ MIRROR HEATER* 2 : W/O MIRROR HEATER

BA

AA

W–B

JUNCTIONCONNECTOR

BJ23 , J24A

R 8 ,

REMOTE CONTROL MIRROR LH

A B R 9 ,

REMOTE CONTROL MIRROR RH

A B

B1 (*2)A5 (*1)

B1 (*2)A5 (*1)

B3A1

B2A3

B3A1

B2A3

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R10 REMOTE CONTROL MIRROR SW8–GROUND : Approx. 12 volts with ignition SW at ACC or ON position

6–7 : Continuity with operation SW at UP or LEFT position8–6 : Continuity with operation SW at DOWN or RIGHT position

: PARTS LOCATION

Code See Page Code See Page Code See Page

J9 35R8

A 37 (Standard Cab) R9 B 37 (Standard Cab)

J23 A 35R8

B 37 (Standard Cab)R10

36 (Access Cab)

J24 B 35A

36 (Access Cab)R10

37 (Standard Cab)

R8A 36 (Access Cab) R9

A37 (Standard Cab)

R8B 36 (Access Cab) B 36 (Access Cab)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1G22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1G26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IB3 44 Front Door LH Wire and Cowl Wire (Left Kick Panel)

IF3 46 Front Door RH Wire and Cowl Wire (Right Kick Panel)

: GROUND POINTS

Code See Page Ground Points Location

IE 44 Left Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

B2 48 (Access Cab) Front Door LH Wire B2 50 (Standard Cab) Front Door LH Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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POWER SEAT

POWER SEAT CONTROL SW(DRIVER’ S SEAT)

9 6

P16

SLIDEREARVERTICAL RECLINING

10 5 7 8 3 2

FRO

NT

RE

AR

UP

DO

WN

UP

DO

WN

FRO

NT

RE

AR

4

30APOWER

POWER SOURCE SYSTEM (SEE PAGE 56)

1C4

W–G

L–W

1

IE

BI11

W–B1 2

B

B–R

1 2

W–R

W–G

2 1

Y–G

Y–R

2 1

L–R L

POWER SEAT MOTOR(DRIVER’ S SEAT SLIDE CONTROL)

P19POWER SEAT MOTOR(DRIVER’ S SEAT FRONT VERTICAL CONTROL)

P15POWER SEAT MOTOR(DRIVER’ S SEAT REAR VERTICAL CONTROL)

P17POWER SEAT MOTOR(DRIVER’ S SEAT RECLINING CONTROL)

P18

W–B

1

2

FRONTVERTICAL

MMMM

L–W

W–B

L–W

W–B

A

AA

JUN

CT

ION

CO

NN

EC

TO

RJ1

7

1 23

A

A A

JUNCTIONCONNECTOR

J16

4

3

1

BI12

SHORTPIN

S 8

R L

BJ11 BJ12

R L

M

2

1

PO

WE

R S

EA

T M

OTO

R( D

RIV

ER

’S

SE

AT

LU

MB

AR

SU

PP

OR

T C

ON

TR

OL)

P20

LUMBAR SUPPORTCONTROL SW(DRIVER’ S SEAT)

L 3

I 1W–B

AA

BA

JUNCTIONCONNECTOR

BJ23 , J24A

W–B

W–B

W–G

2

W–G W–BAC

AC

JUNCTIONCONNECTOR

J23 A

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P16 POWER SEAT CONTROL SW (DRIVER’S SEAT)1–9 : Closed with driver’s seat at front slide operation1–6 : Closed with driver’s seat at rear slide operation1–3 : Closed with driver’s seat at front reclining operation1–2 : Closed with driver’s seat at rear reclining operation

1–10 : Closed with driver’s seat at front vertical up operation1–5 : Closed with driver’s seat at front vertical down operation1–7 : Closed with driver’s seat at rear vertical up operation1–8 : Closed with driver’s seat at rear vertical down operation

4–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

J16 38 L3 38 P18 38

J17 38 P15 38 P19 38

J23 A 35 P16 38 P20 38

J24 B 35 P17 38 S8 35

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1C22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1C26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

48 (Access Cab)

BI1 50 (Standard Cab) Cowl Wire and Seat No.1 Wire (Under the Driver’s Seat)

52

( )

BJ1 52 Seat No.1 Wire and Seat No.2 Wire (Under the Driver’s Seat)

: GROUND POINTS

Code See Page Ground Points Location

IE 44 Left Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I1 46 Cowl Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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RADIO AND PLAYER

20ARADIO

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

2

15AACC

1G10

R

IA511

B4

B

B3

ACC

B7

E

B1

FR+

2 IF110 IF4

BC11

B 5

LGLG

LG

2 1

1 2

LG

LG

B5

FR–

3 IF15 IF4

BC12

B 5

LL

L

L

L

2 BA1

IB45IB23

FL–

6 B

LG

LG

21

12

LGLG

P

B 1

1 BA1

IB410IB22

FL+

2 B

F 9FRONT DOOR SPEAKERRH

T 8TWEETER RH

B 1

VV

L

L

L

F 8FRONT DOOR SPEAKERLH

T 7TWEETER LH

P L ( *2)

( *1)

( *2)

( *1)

(* 1)(*2)

A2

RL+

BG22

BB

B

1 2

A6

RL+

3 BF22 BF2

BG21

YY

Y

R 6REAR DOOR SPEAKERLH

A1

RR+

3 BE2

BH12

RR

R

1 2

A3

RR–

2 BE2

BH11

WW

W

R 7REAR DOOR SPEAKERRH

( *3)

( *3)

( *3)

( *3)

( *3)

( *3)

( *3)

( *3)

( *3)

( *3)

( *3)

( *3)

IG

BR

1413

ACC1ACC

INTEGRATION CONTROLAND PANEL

I25

GR

GR

GR

R

GR

RADIO AND PLAYER

BR 1 , R 2A

2

1

* 2 : W/O DOOR LOCK CONTROL* 1 : W/ DOOR LOCK CONTROL

* 3 : ACCESS CAB

C, R11

II15 3 II1 4 II1

SWG

6 C 7

SW1

C C8

SW2

10

EAU

12

AU1

11

AU2

G–BLR

R L

G–B

STEERING PAD SW[COMB. SW]

C16

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R2 (B) RADIO AND PLAYER(B) 3–GROUND : Approx. 12 volts with ignition SW at ON or ACC position(B) 4–GROUND : Always approx. 12 volts(B) 7–GROUND : Always continuity

S7 (D) STEREO COMPONENT AMPLIFIER(D) 3–GROUND : Approx. 12 volts with ignition SW at ON or ACC position(D) 4–GROUND : Always approx. 12 volts(D) 7–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

C16 34 I25 35 R11 C 35

F836 (Access Cab) R1 A 35

T736 (Access Cab)

F837 (Standard Cab) R2 B 35

T737 (Standard Cab)

F936 (Access Cab) R6 36 (Access Cab)

T836 (Access Cab)

F937 (Standard Cab) R7 36 (Access Cab)

T837 (Standard Cab)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1G22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1G26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA5 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IB244 Front Door LH Wire and Cowl Wire (Left Kick Panel)

IB444 Front Door LH Wire and Cowl Wire (Left Kick Panel)

IF146 Front Door RH Wire and Cowl Wire (Right Kick Panel)

IF446 Front Door RH Wire and Cowl Wire (Right Kick Panel)

II1 46 Cowl Wire and Cowl Wire (Instrument Panel Reinforcement RH)

BA148 (Access Cab)

Front Door LH Wire and Speaker Tweeter Wire LH (Inside of Front Door LH)BA150 (Standard Cab)

Front Door LH Wire and Speaker Tweeter Wire LH (Inside of Front Door LH)

BC148 (Access Cab)

Front Door RH Wire and Speaker Tweeter Wire RH (Inside of Front Door RH)BC150 (Standard Cab)

Front Door RH Wire and Speaker Tweeter Wire RH (Inside of Front Door RH)

BE2 48 (Access Cab) Floor No.2 Wire and Cowl Wire (Center of Left Rocker Panel)

BF2 48 (Access Cab) Floor No.1 Wire and Cowl Wire (Center of Right Rocker Panel)

BG2 48 (Access Cab) Floor No.2 Wire and Rear Door No.1 Wire LH (Under the Left Quarter Panel)

BH1 48 (Access Cab) Floor No.1 Wire and Rear Door No.1 Wire RH (Under the Right Quarter Panel)

: GROUND POINTS

Code See Page Ground Points Location

IG 44 Instrument Panel Brace RH

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

B148 (Access Cab)

Speaker Tweeter Wire LH B548 (Access Cab)

Speaker Tweeter Wire RHB150 (Standard Cab)

Speaker Tweeter Wire LH B550 (Standard Cab)

Speaker Tweeter Wire RH

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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COMBINATION METER

IE225IE34

1F8 1F5

C

(*1)17

C

6 (*2)B

B

A

B B C C B B

BCA

72

IE1IE1

IE15

4WD CONTROLECU

F 7

GAUGE

SE

AT

BE

LT

DO

OR

VEHICLE SPEEDSENSOR(COMBINATION METER)

V 2

9

DD

5

D

3

3

D

2 13 12 13 9 1 4 6 7

B–Y

G–O

G–O

G–O

B–Y

B–Y

B–Y

G–B

P–L

B

G–B

P–L

L–W

B–Y

B–Y

W–LR

JUNCTIONCONNECTOR

J 9

8

3 2

1

( *2)

( *2)

( *1)

G–O ( *1)

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

SPD(*1)SP1(*2)

TACH

10A

TO

BU

CK

LE S

W

TO D

OO

R C

OU

RT

ES

YS

W L

H

FRO

M IG

NIT

ION

KE

YC

YLI

ND

ER

LIG

HT

TO

IG

NIT

ION

KE

YC

YLI

ND

ER

LIG

HT

TO D

OO

R C

OU

RTE

SY

SW

2

DOME10A

L–Y

L–Y

1E6

1F3

2

1

L–B

SPD

TO U

NLO

CK

WA

RN

ING

SW

, C14C13, CC11

COMBINATION METER

BA , C12 D

IE19IE36

(*3)(*4)

IE23IE217

R–L

R–L

P–L

P–L

( *1)

( *2)

( *2)

( *1)

( *1)

( *2)

( *2)

( *1)

IGN

ITE

RI 2 E

3

EN

GIN

E C

ON

TR

OL

MO

DU

LEA

A5

1L11

(*1)(*2)

P–BLB

B

C

SR

S

TO C

EN

TER

AIR

BA

GS

EN

SO

R A

SS

EM

BLY

10

B–Y

INTEGRATIONRELAY

(*8)

G–O ( *5)

ENGINE CONTROLMODULE

BE 3 , E 4A

1N11

TACHOMETERSPEEDOMETERLCD

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IE113IE110

A

OIL

* 5 : W/ DAYTIME RUNNING LIGHT

1

BB15BB14 IE1248

C C D A A A D B BB

IH

OIL PRESSURESW

WA

TER

TE

MP

.

O 2FUELSENDER

F10

FU

EL

FU

EL

O/D

OF

F

JUNCTIONCONNECTOR

J 8

WA

SH

ER

4LO

4HI

( *1)

4WD

(*2

)

8 6 5 3 12 1 8 1 11 10

CC

2 1

3

C

6

Y–R

Y–R

BR

Y–R

B–R

L–O

Y–B

LG–R

BR

BR

–Y

Y–B

Y–B

BR

B1 (*2)A1 (*1)

(*2)(*1)

* 4 : 5VZ–FE M/T* 3 : 5VZ–FE A/T* 2 : 5VZ–FE* 1 : 2UZ–FE

( *1)

( *1)

BB16

TO E

NG

INE

CO

NTR

OL

MO

DU

LE

TO W

AS

HE

R L

EV

EL

SE

NS

OR

FR

OM

INT

EG

RA

TIO

N C

ON

TRO

LA

ND

PA

NE

L

TO 4

WD

CO

NT

RO

L E

CU

FR

OM

INT

EG

RA

TIO

N C

ON

TRO

LA

ND

PA

NE

L

TO 4

WD

CO

NT

RO

L E

CU

(*1

)

( *1)

TO

AD

D D

ET

EC

TIO

N S

W (

*2)

GR

BR

–Y

( *1)

( *1)

( *1)

( *1)

( *1)

( *1)

( *2)

C11

COMBINATION METER

BA , C12 C, C13 C14, D

BW

3,

A

WA

TER

TE

MP

. S

EN

DE

R

IE1 (*2)(*1)

B–R

Y–R

BR

BR

BR

Y–B

OIL

( *7)

( *6)

( *6)

( *7)

* 6 : W/ TACHOMETER* 7 : W/O TACHOMETER* 8 : W/O DAYTIME RUNNING LIGHT

1

OIL

PR

ES

SU

RE

SE

ND

ER

O 6

HE

AT

WIR

E

Y–B ( *6)

( *7)

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COMBINATION METER

VO

LT

C9

2 B

CR

UIS

E

BR

AK

E

HIG

H B

EA

M

AB

S11

B16

A 7 C A13

2

1

1B5

1E4

1B

6

2

1 1

EA

I 2IA5

18

A

IF

J 3JUNCTIONCONNECTOR

A

PARKINGBRAKESW (M/T)

P 5PARKINGBRAKESW (A/T)

P 5

R–G

W–B

(*5)

(*5 M/T)

(*5 A/T)( *8

A/T

)

(* 8 M/T)

BR

AK

E F

LUID

LE

VE

LW

AR

NIN

G S

W

B 2

TO A

BS

AC

TU

ATO

R W

ITH

EC

U

FRO

M IN

TE

GR

ATI

ON

RE

LAY

(*5

)FR

OM

HE

AD

LIG

HT

LH,

RH

(*8

)

FRO

M U

NLO

CK

WA

RN

ING

SW

( *1)

( *2)

A

II

J13JUNCTIONCONNECTOR

C11

COMBINATION METER

BA , C12 C, C13 D, C14

D10

A/T

OIL

TE

MP

.

MA

LFU

NC

TIO

NIN

DIC

AT

OR

LA

MP

8 C

TO

EN

GIN

E C

ON

TR

OL

MO

DU

LE

Y–B

Y

B–R

V–G

Y–R

G–W

G–W

W–B W

–B

W–B

W–B

B–L

W–B

R–W

G–W

R–W

R–W

R–W

W–B

W–B ( M

/T)

TO

EN

GIN

E C

ON

TR

OL

MO

DU

LE

W–B

A

AA

JUN

CT

ION

CO

NN

EC

TO

R

J18

INT

EG

RA

TIO

NR

ELA

Y

1N13

1N1

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C12 1 B 3 B

TUR

N L

H

CH

AR

GE

TUR

N R

H

B4A7

10 1F

5AIGN

A/T

P

D8 D6

2 ND

D7

R P

D5 D4 B15

ILLU

MIN

AT

ION

B14D2

G–Y

G–B

B–O

Y–G

L

LG–B

W–R

R–B

L–Y

GW

–G

R–Y

* 8 : W/O DAYTIME RUNNING LIGHT* 5 : W/ DAYTIME RUNNING LIGHT

D9

LLG

TO

GE

NE

RA

TOR

TO

DE

TEC

TIO

N S

W( T

RA

NS

FER

NE

UTR

AL

PO

SIT

ION

)

TO R

HE

OS

TA

T

FRO

M T

UR

N S

IGN

AL

FLA

SH

ER

FRO

M IN

TE

GR

ATI

ON

RE

LAYFROM A/T INDICATOR SW

[PARK/NEUTRAL POSITION SW]

(*2)

( *2)

( *2)

( *2)

* 1 : 2UZ–FE* 2 : 5VZ–FE

C11

COMBINATION METER

BA , C12 C, C13 D, C14

W–B

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

I 1

IE

BA

AA

JUNCTIONCONNECTOR

BJ23 , J24A

W–B

W–B

W–B

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COMBINATION METER

B2 BRAKE FLUID LEVEL WARNING SW1–2 : Closed with float down

P5 PARKING BRAKE SW1–GROUND : Closed with parking brake lever pulled up

C11 (A), C12 (B), C13 (C) COMBINATION METER(B) 5–GROUND : Always approx. 12 volts

(A) 9, (B) 3–GROUND : Approx. 12 volts with ignition SW at ON or ST position(A) 7, (A)13, (B) 8–GROUND :Always continuity

W3 (A), (B) WATER TEMP. SENDER(A) 1, (B) 1-GROUND : Approx. 160–240 Ω (50°C, 122°F)

: Approx. 17.1–21.2 Ω (120°C, 248°F)

: PARTS LOCATION

Code See Page Code See Page Code See Page

B230 (2UZ–FE)

F1036 (Access Cab) J23 A 35

B232 (5VZ–FE)

F1037 (Standard Cab) J24 B 35

C11 A 34 I2 33 (5VZ–FE)O2

31 (2UZ–FE)

C12 B 34 J3 35O2

33 (5VZ–FE)

C13 C 34 J8 35 P5 35

C14 D 34 J9 35V2

31 (2UZ–FE)

E3 A 34 J13 35V2

33 (5VZ–FE)

E4 B 34J18

31 (2UZ–FE)W3

A 31 (2UZ–FE)

F7 35J18

33 (5VZ–FE)W3

B 33 (5VZ–FE)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1B22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1B26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1E22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1E26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1F22 (*2)

1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1L 23 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1N 27 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA5 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IE1

IE2 46 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

IE3

g ( g )

BB148 (Access Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)BB150 (Standard Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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: GROUND POINTS

Code See Page Ground Points Location

EA40 (2UZ–FE)

Front Left FenderEA42 (5VZ–FE)

Front Left Fender

IE44 Left Kick Panel

IF44 Left Kick Panel

IH44 Right Kick Panel

II44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I1 46 Cowl Wire I2 46 Cowl Wire

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AIR CONDITIONING

E

7

6

B9A13A15 B4

2

1

A18 A21 A19

A3 A9 (*2)B33 B2B31 (*1)

IE14IE216IE38

A8

G–W ( *1)

B–W ( *1)

L–R

( *1)

L–R

( *1)

A10 A20

L–B

L–YL

( *1)

W–G

B–L

W–L

( *2)

I24

INTEGRATION CONTROL AND PANEL

BA , I25

E 3

ENGINE CONTROLMODULE

BA , E 4

B–Y

B–Y

B–W B

B–Y

B–L

JUNCTIONCONNECTOR

J 8

E

AIR INLETCONTROLSERVO MOTOR

A15

(*3)(*4)

DE

FR

OS

TER

SW

[BLO

WE

R S

W]

B 6

M

FRS REC

+

5

2 1

E

W–L

( *2)

A/C

TH

ER

MIS

TOR

A13

A/C

MA

GN

ET

ICC

LUT

CH

FRS REC IG L

AIND(*1)ACT(*2) A/CS

A/CM(*1)AC1(*2) MGC E IN

B–Y

B–Y

B–Y

B–YB–YB–Y

A/C

LO

CK

SE

NS

OR

B1 (*2)A3 (*1)A1A2

A 2

A/C MAGNETIC CLUTCH

B

A 3

A/C MAGNETIC CLUTCHAND LOCK SENSOR

A

B–Y

E

E 5 EC , E 7

, E28C23

G–W ( *1)

B–W ( *1)

LCK1 E2

( *2)

( *2)

ACID(*1)ACT(*2)

A/CS ACMG(*1)AC1(*2)

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10AA/C

2

2

1

2

B12

IA52

B1

A

II

W–B

L–R

W–L

50AHTR

FROM POWER SOURCE SYSTEM (SEE PAGE 56)

2

10AGAUGE

1E51F9

C

C

1 3

2 5

4

2 2

2 2 2

EA

IA419

A

IF

E 1

2 3

4 1

IA413

2

1

I16

8 4

LOM1M2H15

3

1

B–Y

L–R

B–Y

L–R

W–BL–B

W–B

W–B

W–B

B–Y

R

RB–Y

L–R

L–R

L–B

BLOWERMOTOR

B 4

BLOWER RESISTORB 5

L–Y

L–R

JUNCTIONCONNECTOR

J 1

HTRRELAY

Y–R

Y–R

BLOWER SWB 6

* 1 : 2UZ–FE* 2 : 5VZ–FE* 3 : 5VZ–FE A/T* 4 : 5VZ–FE M/T

1

2

B

GND

JUN

CTI

ON

CO

NN

EC

TOR

J13

A W–B

W–B

L–B

Y–R

W–B

W–L

I 4

JUNCTIONCONNECTOR

J 3A

W–B

W–B

I24

INTEGRATION CONTROL AND PANEL

BA , I25

2

1

IA417IA48

A6 B11

A/C

DU

AL

PR

ES

SU

RE

SW

A 1

IG+ AC+2

M

A

A

JUN

CTI

ON

CO

NN

EC

TOR

J18

O ( *2)

O ( *2)

L–W

( *2)

W–L

( *2)

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AIR CONDITIONING

1. HEATER BLOWER MOTOR OPERATIONCurrent is applied at all times through the HTR fuse to TERMINAL 5 of the HTR relay.When the ignition SW is turned on, current flows through the GAUGE fuse to TERMINAL 2 of the HTR relay to the coil sideto TERMINAL 1 to TERMINAL 3 of the blower SW.

∗ Low speed operationWhen the blower SW is moved to LO position, current flows to TERMINAL 3 of the blower SW to TERMINAL 1 toGROUND, causing the HTR relay to switch on. This causes the current to flow from the HTR fuse to TERMINAL 5 of theHTR relay to TERMINAL 3 to TERMINAL 1 of the blower motor to TERMINAL 2 to TERMINAL 4 of the blower resistor toTERMINAL 1 to GROUND, causing the blower motor to rotate at low speed.

∗ Medium speed operation (Operation at M1, M2)When the blower SW is moved to M1 position, current flows to TERMINAL 3 of the blower SW to TERMINAL 1 toGROUND, turning the HTR relay to switch on. This causes the current to flow from the HTR fuse to TERMINAL 5 of theHTR relay to TERMINAL 3 to TERMINAL 1 of the blower motor to TERMINAL 2 to TERMINAL 4 of the blower resistor toTERMINAL 3 to TERMINAL 4 of the blower SW to TERMINAL 1 to GROUND. At this time, the blower resistance of theblower resistor is less than at low speed, so the blower motor rotates at medium low speed.When the blower SW is moved to M2 position, current flows through the motor flows from TERMINAL 4 of the blowerresistor to TERMINAL 2 to TERMINAL 8 of the blower SW to TERMINAL 1 to GROUND. At this time, resistance of theblower resistor is less than at M1 position, so the blower motor rotates at medium high speed.

∗ High speed operationWhen the blower SW is moved to HIGH position, current flows to TERMINAL 3 of the blower SW to TERMINAL 1 toGROUND, turning the HTR relay to switch on.This causes the current to flow from the HTR fuse to TERMINAL 5 of the HTR relay to TERMINAL 3 to TERMINAL 1 of theblower motor to TERMINAL 2 to TERMINAL 5 of the blower SW to TERMINAL 1 to GROUND, causing the blower motor torotate at high speed.

2. OPERATION OF AIR INLET CONTROL SERVO MOTOR∗ Switching from FRESH to RECIRC

With the ignition SW turned on, current flows from the GAUGE fuse to TERMINAL 5 of the air inlet control servo motor.When the RECIRC/FRESH SW is switched to the RECIRC side, current flows from TERMINAL 5 of the air inlet controlservo motor to TERMINAL 1 to TERMINAL (A) 13 of the integration control and panel to TERMINAL (B) 1 to GROUND.The motor rotates and the damper moves to the RECIRC side. When it is in the RECIRC position, current is cut inside theservo motor and the damper stops at that position.

∗ Switching from RECIRC to FRESHWith the ignition SW turned on, when the RECIRC/FRESH SW is switched to the FRESH side, current flows fromTERMINAL 5 of the air inlet control servo motor to TERMINAL 2 to TERMINAL (A) 15 of the integration control and panelto TERMINAL (B) 1 to GROUND, the motor rotates and the damper moves to the FRESH side. when it is in the FRESHposition, current is cut inside the servo motor and the damper stops at that position. When the ignition SW turned on, andmode SW (Integration control and panel) is at DEF or F/DEF position, it causes the damper to move to the FRESH side.Whether the RECIRC/FRESH SW (Integration control and panel) is on or not.

3. AIR CONDITIONING OPERATIONWhen the blower SW is on, current flows from the GAUGE fuse to the HEATER relay (Coil side) to TERMINAL 3 of theblower SW to TERMINAL 1 to GROUND, activating the HTR relay. This causes current to flow from the HTR fuse to the HTRrelay (Point side) to A/C fuse to TERMINAL (B) 12 of the A/C SW (Integration control and panel). When the A/C SW(Integration Control and panel) is turned on. Current flows from the A/C fuse to TERMINAL (B) 12 of the integration controland panel to TERMINAL (A) 8 to A/C magnetic clutch. Causing The compressor to operate.When blower SW is on and mode SW (Integration control and panel) is at DEF or F/DEF position, it causes A/C to runwhether A/C SW (Integration control and panel) is on or not.

SYSTEM OUTLINE

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HTR RELAY5–3 : Closed with ignition SW on and heater blower SW on

A1 A/C DUAL PRESSURE SW1–2 : Open with refrigerant pressure at less than approx. 2.0 kgf/cm2 (196.1 kpa, 28.4 psi) or

more than approx. 32.0 kgf/cm2 (3138.1 kpa, 455 psi)

I24 (A), I25 (B) INTEGRATION CONTROL AND PANEL(B) 4–GROUND : Approx. 12 volts with ignition SW at ON or ST position(B)12–GROUND : Approx. 12 volts with ignition SW on and blower SW on(B) 1–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

A130 (2UZ–FE) B6 34 J1 33 (5VZ–FE)

A132 (5VZ–FE) E3 A 34 J3 35

A2 B 32 (5VZ–FE) E4 B 34 J8 35

A3 A 30 (2UZ–FE) E5 C 34 J13 35

A13 34 E7 E 34J18

31 (2UZ–FE)

A15 34 I24 A 35J18

33 (5VZ–FE)

B4 34 I25 B 35

B5 34 J1 31 (2UZ–FE)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1E22 (*2)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1E26 (*1)

Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1F22 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1F26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA444 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IA544 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IE1

IE2 46 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

IE3

g ( g )

: GROUND POINTS

Code See Page Ground Points Location

EA40 (2UZ–FE)

Front Left FenderEA42 (5VZ–FE)

Front Left Fender

IF 44 Left Kick Panel

II 44 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

E140 (2UZ–FE)

Engine Room Main WireI4

46 Cowl WireE142 (5VZ–FE)

Engine Room Main WireI16

46 Cowl Wire

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

SERVICE HINTS

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I GROUND POINT

SUB BATT RELAY

DAYTIME RUNNINGLIGHT RESISTOR

FOG RELAY

DRL NO. 4 RELAY

EFI RELAY

HTR RELAY

BRAKE FLUID LEVELWARNING SW

A/C PRESSURE SW

ST RELAY

FRONT FOG LIGHT LH

FRONT FOG LIGHT RH

POWER OUTLET RELAY

FRONT TURN SIGNALLIGHT AND PARKINGLIGHT LH

FRONT TURN SIGNALLIGHT AND PARKINGLIGHT RH

CRUISE CONTROL SW[COMB. SW]

(E1)

(E02)

(E03)

(ME01)

(E01)

WASHER LEVELSENSOR

IGNITER ANDIGNITION COIL NO. 1

IGNITER ANDIGNITION COIL NO. 2

IGNITER ANDIGNITION COIL NO. 3

IGNITER ANDIGNITION COIL NO. 4

IGNITER ANDIGNITION COIL NO. 5

IGNITER ANDIGNITION COIL NO. 6

IGNITER ANDIGNITION COIL NO. 7

IGNITER ANDIGNITION COIL NO. 8

NOISE FILTER

DATA LINKCONNECTOR 3

2

2

C C

C

C

A

W–B

( *5)

A

A

A2

2

2

2

2

A

A

A

A

A

A

A

A

EA

A

IA518

E 5

E 5

E 5

EC

IE1

25

IE21

EB

I 3

(SG)

ENGINECONTROLMODULE

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–BW–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B W–B

BR

BR

BR

BR

BR

BR

BR

BR

BR

BR BR

BRBR

BR

W–B

W–B

W–B

W–B

BR

W–B

BR

BR

BR

BR

W–B

W–B

JUNCTIONCONNECTOR

J18

JUNCTIONCONNECTOR

J 2

(*5)

(*5)

(TOWING PACKAGE)

(*1)

(*2)

(*1)

(2UZ–FE) (2UZ–FE)

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HEATED OXYGENSENSOR(BANK 1 SENSOR 2)

NOISE FILTER

IGNITER

CRUISE CONTROL SW[COMB. SW]

(E1)

(E02)

(E03)

(E05)

(E01)

(ME01)

CIGARETTE LIGHTER

WIPER AND WASHER SW[COMB. SW]

PARKING BRAKE SW

POWER OUTLET

POWER OUTLET

TURN SIGNAL SW[COMB. SW]

LIGHT CONTROL SW[COMB. SW]

DATA LINKCONNECTOR 3

PERSONAL LIGHT

VANITY LIGHT RH

VANITY LIGHT LH

HIGH MOUNTED STOPLIGHT AND CARGOLIGHT

POWER RELAY

INTEGRATION RELAY

FUEL PUMP

POWER WINDOWCONTROL SW(BACK WINDOW)

BLOWER SW

I 3BD1

3

IE1

14

IE1

17

B 4

1A2

1J8

I 2

IF

BB1

12

I 2

I 2

ED

ID12ID22

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

BRBR

BRBRBR

BR

W–BBR

W–B

W–B

W–B

W–B

BR

BR

W–B

W–B

W–B

W–B

W–B

JUNCTIONCONNECTOR

J 3

(M/T)

W–B

W–B

A

A

A

A

A

A

(*3)(*4)

(5VZ–FE)

ENGINECONTROLMODULE

* 2 : W/O DAYTIME RUNNING LIGHT* 1 : W/ DAYTIME RUNNING LIGHT

* 3 : W/ CIGARETTE LIGHTER ILLUMINATION* 4 : W/O CIGARETTE LIGHTER ILLUMINATION* 5 : 2UZ–FE

IG

BRRADIO AND PLAYER

DATA LINKCONNECTOR 3

W–BIE115 W–B

(SG)

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I GROUND POINT

PARK/NEUTRALPOSITION SW

DOOR LOCK MOTORAND DOOR UNLOCKDETECTION SWFRONT LH

POWER WINDOWMASTER SW

DOOR KEY LOCK ANDUNLOCK SW FRONT LH

REMOTE CONTROLMIRROR SW

MIRROR HEATER LH[REMOTE CONTROL MIRROR LH]

RHEOSTAT

GLOVE BOX LIGHT

O/D MAIN SW

SHORT PIN

CLUTCH START SW

(–S)

TURN SIGNAL FLASHER

TVIP ECU

SHORT CONNECTOR(TVIP)

TVIP BUZZER

COMBINATIONMETER

MIRROR HEATER SW

TOWING CONVERTER

SECURITY INDICATORAND GLASS BREAKAGESENSOR MICROPHONE

I 1IE2

19

B 3

B 2

BA

BA

BA

BA

BA

BA

AA

AA

AA

AA

IA4

3

I 1

I 1

(E)

BACK–UP LIGHT RELAY

DOOR COURTESY SWREAR LH UPPER

DOOR COURTESY SWREAR LH LOWER

BJ

IB31 BG23

BE26

AA

LICENSE PLATELIGHT LH

LICENSE PLATELIGHT RH

REAR COMBINATIONLIGHT LH

REAR COMBINATIONLIGHT RH

B10

B10

BL

BB23

W–B W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–BW–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

JUNCTIONCONNECTOR

BJ23 , J24A

(5AZ–FE A/T) (5AZ–FE A/T)

(A/T)

(M/T)

(M/T)

(M/T)

(A/T)

CLUTCH STARTCANCEL SW

W–B

W–B

AA

(BRL)

W–B

(E2)

(E1)W–B

W–B

COMBINATIONMETER

I 1

W–B

W–B

LUMBAR SUPPORTCONTROL SW(DRIVER’ S SEAT)

POWER SEATCONTROL SW(DRIVER’ S SEAT)

BI11

A

AA

W–B

W–B

W–B

W–B

W–B

JUN

CTI

ON

CO

NN

EC

TOR

J17

TRAILER SOCKET

W–B

BK1

2W W

W–B

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W–B

ABS ACTUATORWITH ECU

(GND)

(GND)

II

IF3

1DOOR KEY LOCK ANDUNLOCK SW RH

DOOR LOCK CONTROLSW RH

DOOR LOCK MOTORAND DOOR UNLOCKDETECTION SW RH

B 7

WIPER MOTOR

(E1)

4WD CONTROL ECU

TRANSMISSIONCONTROL RELAY

BLOWER RESISTOR

I 4

I 4

I 4

DETECTION SW(TRANSFER L4 POSITION)

TRANSFER SHIFTACTUATOR

DETECTION SW(TRANSFER 4WD POSITION)

DETECTION SW(TRANSFER NEUTRAL POSITION)

DOOR COURTESY SWREAR RH UPPER

DOOR COURTESY SWREAR RH LOWER

BF26

BH13

BK

I 3

W–B

W–B

W–B

W–B

W–B

W–B W–B W–B W–B W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–BW–B

W–B

W–B

A

A

A

A

JUNCTIONCONNECTOR

J13

W–B

W–B

INTEGRATION CONTROLAND PANEL

W–B

IE17IE22

EC16

ED16EG16

ADD ACTUATOR

W–B

W–B

W–B

W–B

W–B

W–B

(* 6)(*7)

(*6)(*7)

( *6)

( *6)

( *7)

(* 5)

(*6, *7)

* 5 : 2UZ–FE

I 3

( *6,

*7)

(* 6)

(*6, *7)

(*6)

(*7)(*6, *7)

(5VZ–FE)

* 1 : W/ DAYTIME RUNNING LIGHT* 2 : W/O DAYTIME RUNNING LIGHT

(*6, *7)

16

1L

(E3)

CENTER AIRBAGSENSOR ASSEMBLY

BUCKLE SW LH

INTEGRATION RELAY

COMBINATIONMETER

FUEL SENDER

(E2)

SEAT BELT WARNINGOCCUPANT DETECTIONSENSOR AND BUCKLESW RH

IHIE

BB111

JUNCTIONCONNECTOR

BR BR

C

C

CC

BR

BR

W–B

W–B W–B

W–B

BR

J 8

A

MIRROR HEATER RH[REMOTE CONTROL MIRROR RH]

W–BW–B

INTEGRATION RELAY

BUCKLE SW LH

CENTER AIRBAGSENSOR ASSEMBLY

* 6 : 2UZ–FE 4WD* 7 : 5VZ–FE 4WD

W–B

W–B

C BR

BR

BI1

4

W–B

W–B

BR

(*1)

(*2)

W–B

(*9)

(*8) (*8)

* 8 : W/ POWER SEAT, BENCH SEAT* 9 : SEPARATE SEAT, CAPTAIN SEAT

24

1N

OPTION CONNECTORC BR

(W/O POWER SEAT)

W–B

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I GROUND POINT

: PARTS LOCATION

Code See Page Code See Page Code See Page

J231 (2UZ–FE) J13 35 J23 A 35

J233 (5VZ–FE) J17 38 J24 B 35

J3 35J18

31 (2UZ–FE)

J8 35J18

33 (5VZ–FE)

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 21 Engine Room R/B (Engine Compartment Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1A22 (*2)

Roof Wire and Driver Side J/B (Lower Finish Panel)1A26 (*1)

Roof Wire and Driver Side J/B (Lower Finish Panel)

1J22 (*2)

1J26 (*1)

Cowl Wire and Driver Side J/B (Lower Finish Panel)1L 23 (*2)

Cowl Wire and Driver Side J/B (Lower Finish Panel)

1N 27 (*1)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EC1 40 (2UZ–FE) Engine No.2 Wire and Engine Wire (Near the Starter)

ED1 40 (2UZ–FE) Engine No.2 Wire and Differential Wire (Near the Transmission)

EG1 42 (5VZ–FE) Engine Wire and Differential Wire (Front Differential Upper Side)

IA444 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IA544 Engine Room Main Wire and Cowl Wire (Left Kick Panel)

IB3 44 Front Door LH Wire and Cowl Wire (Left Kick Panel)

ID146 Cigarette Lighter Wire and Cowl Wire (Instrument Panel Brace LH)

ID246 Cigarette Lighter Wire and Cowl Wire (Instrument Panel Brace LH)

IE146 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

IE246 Engine Wire and Cowl Wire (Right Side of Instrument Panel)

IF3 46 Front Door RH Wire and Cowl Wire (Right Kick Panel)

BB148 (Access Cab)

BB150 (Standard Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)

BB248 (Access Cab)

Frame Wire and Cowl Wire (Under the Driver’s Seat)

BB250 (Standard Cab)

BD148 (Access Cab)

Frame Wire and Cowl Wire (Under the Front Passenger’s Seat)BD150 (Standard Cab)

Frame Wire and Cowl Wire (Under the Front Passenger’s Seat)

BE2 48 (Access Cab) Floor No.2 Wire and Cowl Wire (Center of Left Rocker Panel)

BF2 48 (Access Cab) Floor No.1 Wire and Cowl Wire (Center of Right Rocker Panel)

BG2 48 (Access Cab) Floor No.2 Wire and Rear Door No.1 Wire LH (Under the Left Quarter Panel)

BH1 48 (Access Cab) Floor No.1 Wire and Rear Door No.1 Wire RH (Under the Right Quarter Panel)

BI1 52 Cowl Wire and Seat No.1 Wire (Under the Driver’s Seat)

BK148 (Access Cab)

Frame Wire and Frame No 3 Wire (Near the License Plate Light)BK150 (Standard Cab)

Frame Wire and Frame No.3 Wire (Near the License Plate Light)

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Bench Seat * 4 : Separate Seat, Captain Seat (w/o Power Seat)

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: GROUND POINTS

Code See Page Ground Points Location

EA40 (2UZ–FE)

Front Left FenderEA42 (5VZ–FE)

Front Left Fender

EB 40 (2UZ–FE) Rear Bank of Right Cylinder Head

EC 40 (2UZ–FE) Rear Bank of Left Cylinder Head

ED 42 (5VZ–FE) Intake Manifold Left

IE44 Left Kick Panel

IF44 Left Kick Panel

IG 44 Instrument Panel Brace RH

IH44 Right Kick Panel

II44 Right Kick Panel

BJ 48 (Access Cab) Inside of Rear Door LH

BK 48 (Access Cab) Inside of Rear Door RH

BL48 (Access Cab)

Surrounding of the Front of the Fuel TankBL50 (Standard Cab)

Surrounding of the Front of the Fuel Tank

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

E5 40 (2UZ–FE) Engine Wire B3 50 (Standard Cab) Front Door LH Wire

I146 Cowl Wire B4

48 (Access Cab)Roof Wire

I246 Cowl Wire B4

50 (Standard Cab)Roof Wire

I3 46 Engine WireB7

48 (Access Cab)Front Door RH Wire

I4 46 Cowl WireB7

50 (Standard Cab)Front Door RH Wire

B248 (Access Cab)

B1048 (Access Cab)

Frame WireB250 (Standard Cab) Front Door LH Wire

B1050 (Standard Cab)

Frame Wire

B3 48 (Access Cab)

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J POWER SOURCE (Current Flow Chart)

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J

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J POWER SOURCE (Current Flow Chart)

Driver Side J/B ( See Page 22 (w/o Daytime Running Light),

See Page 26 (w/ Daytime Running Light))

Fuse System Page

5A CARGO LPCargo Light

Integration Control and Panel

136

138

5A ECU IG

ABS

Headlight (w/ Daytime Running Light)

Light Auto Turn Off (w/ Daytime Running Light)

Light Auto Turn Off (w/o Daytime Running Light)

Power Window

TVIP and Wireless Door Lock Control

156

98

124

128

204

196

5A IGN

Charging

Combination Mater

Cruise Control (2UZ–FE)

Cruise Control (5VZ–FE)

Electronically Controlled Transmission and A/T Indicator (2UZ–FE)

Electronically Controlled Transmission and A/T Indicator (5VZ–FE)

Engine Control (2UZ–FE)

Engine Control (5VZ–FE)

SRS

74

234

160

164

144

150

76

88

169

5A STA

Electronically Controlled Transmission and A/T Indicator (2UZ–FE)

Electronically Controlled Transmission and A/T Indicator (5VZ–FE)

Engine Control (2UZ–FE)

Engine Control (5VZ–FE)

Starting (2UZ–FE)

Starting (5VZ–FE)

144

150

76

88

64

60

5A TURNTrailer Towing

Turn Signal and Hazard Warning Light

132

120

7.5A OBDEngine Control (2UZ–FE)

Engine Control (5VZ–FE)

76

88

10A GAUGE

ABS

Air Conditioning

Back–Up Light

Cargo Light

Charging

Combination Mater

Cruise Control (2UZ–FE)

Cruise Control (5VZ–FE)

Door Lock Control (w/ Daytime Running Light)

Door Lock Control (w/o Daytime Running Light)

Electronically Controlled Transmission and A/T Indicator (2UZ–FE)

Electronically Controlled Transmission and A/T Indicator (5VZ–FE)

Engine Control (2UZ–FE)

Engine Control (5VZ–FE)

156

240

108

136

74

234

160

164

184

190

144

150

76

88

∗ These are the page numbers of the first page on which the related system is shown.

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J

Fuse System Page

10A GAUGE

Integration Control and Panel

Interior Light

Key Reminder and Seat Belt Warning

Mirror Heater

Starting (5VZ–FE)

Trailer Towing

Wiper and Washer (w/ Int Time SW Mechanism)

Wiper and Washer (w/o Int Time SW Mechanism)

4WD (2UZ–FE)

4WD (5VZ–FE)

138

116

210

226

60

132

220

224

174

180

10A HORNHorn

TVIP and Wireless Door Lock Control

218

196

15A ACC

Back–Up Light

Cigarette Lighter and Power Outlet

Clock

Cruise Control (2UZ–FE)

Cruise Control (5VZ–FE)

Electronically Controlled Transmission and A/T Indicator (2UZ–FE)

Electronically Controlled Transmission and A/T Indicator (5VZ–FE)

Integration Control and Panel

Radio and Player

Remote Control Mirror

SRS

Trailer Towing

4WD (2UZ–FE)

4WD (5VZ–FE)

108

214

216

160

164

144

150

138

232

228

169

132

174

180

15A STOP

ABS

Cruise Control (2UZ–FE)

Cruise Control (5VZ–FE)

Electronically Controlled Transmission and A/T Indicator (2UZ–FE)

Electronically Controlled Transmission and A/T Indicator (5VZ–FE)

Engine Control (2UZ–FE)

Engine Control (5VZ–FE)

Stop Light

Trailer Towing

156

160

164

144

150

76

88

122

132

15A TAIL

Clock

Engine Control (2UZ–FE)

Headlight (w/ Daytime Running Light)

Illumination

Integration Control and Panel

Light Auto Turn Off (w/ Daytime Running Light)

Light Auto Turn Off (w/o Daytime Running Light)

Taillight

216

76

98

112

138

124

128

110

∗ These are the page numbers of the first page on which the related system is shown.

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J POWER SOURCE (Current Flow Chart)

Fuse System Page

15A TAILTrailer Towing

TVIP and Wireless Door Lock Control

132

196

20A WIPWiper and Washer (w/ Int Time SW Mechanism)

Wiper and Washer (w/o Int Time SW Mechanism)

220

224

20A 4WD4WD (2UZ–FE)

4WD (5VZ–FE)

174

180

30A POWER

Door Lock Control (w/ Daytime Running Light)

Door Lock Control (w/o Daytime Running Light)

Light Auto Turn Off (w/ Daytime Running Light)

Light Auto Turn Off (w/o Daytime Running Light)

Power Seat

Power Window

TVIP and Wireless Door Lock Control

184

190

124

128

230

204

196

Engine Room R/B (See Page 21)Fuse System Page

5A ECU–BEngine Control (2UZ–FE)

TVIP and Wireless Door Lock Control

76

196

7.5A ALT–S Charging 74

10A A/CAir Conditioning

Integration Control and Panel

240

138

10A DOME

Clock

Combination Mater

Door Lock Control (w/ Daytime Running Light)

Door Lock Control (w/o Daytime Running Light)

Integration Control and Panel

Interior Light

Key Reminder and Seat Belt Warning

SRS

TVIP and Wireless Door Lock Control

216

234

184

190

138

116

210

169

196

10A EFI NO.2Engine Control (2UZ–FE)

Engine Control (5VZ–FE)

76

88

10A ETCS (2UZ–FE)Cruise Control (2UZ–FE)

Engine Control (2UZ–FE)

160

76

10A HEAD LH

Fog Light (w/o Daytime Running Light)

Headlight (w/ Daytime Running Light)

Headlight (w/o Daytime Running Light)

106

98

102

10A HEAD LLFog Light (w/ Daytime Running Light)

Headlight (w/ Daytime Running Light)

104

98

10A HEAD RH

Fog Light (w/o Daytime Running Light)

Headlight (w/ Daytime Running Light)

Headlight (w/o Daytime Running Light)

106

98

102

10A HEAD RL Headlight (w/ Daytime Running Light) 98

∗ These are the page numbers of the first page on which the related system is shown.

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2003 TOYOTA TUNDRA (EWD491U)

255

J

Fuse System Page

15A EFI NO.1

Cruise Control (2UZ–FE)

Cruise Control (5VZ–FE)

Electronically Controlled Transmission and A/T Indicator (2UZ–FE)

Electronically Controlled Transmission and A/T Indicator (5VZ–FE)

Engine Control (2UZ–FE)

Engine Control (5VZ–FE)

160

164

144

150

76

88

15A ETCS (5VZ–FE) Cruise Control (5VZ–FE) 164

15A MIR HTR Mirror Heater 226

15A PWR OUTLET1 Cigarette Lighter and Power Outlet 214

15A PWR OUTLET2 Cigarette Lighter and Power Outlet 214

20A FOGFog Light (w/ Daytime Running Light)

Fog Light (w/o Daytime Running Light)

104

106

20A HAZTrailer Towing

Turn Signal and Hazard Warning Light

132

120

20A RADIO Radio and Player 232

30A AM2

Engine Control (2UZ–FE)

Engine Control (5VZ–FE)

Ignition (2UZ–FE)

Ignition (5VZ–FE)

Starting (2UZ–FE)

Starting (5VZ–FE)

76

88

68

72

64

60

30A ST3 Starting (2UZ–FE) 64

30A SUB BATT Trailer Towing 132

30A TOW BRK Trailer Towing 132

30A TOW TAIL Trailer Towing 132

30A TOWING Trailer Towing 132

40A ABS2 ABS 156

40A ABS3 ABS 156

40A AM1Cruise Control (5VZ–FE)

Starting (5VZ–FE)

164

60

50A HTR Air Conditioning 240

50A J/BIllumination

Taillight

112

110

100AALT (Except TowingPackage)

Charging

Cigarette Lighter and Power Outlet

Cruise Control (5VZ–FE)

Illumination

Starting (5VZ–FE)

Taillight

74

214

164

112

60

110

140A ALT (Towing Package)

Charging

Cigarette Lighter and Power Outlet

Illumination

Taillight

74

214

112

110

∗ These are the page numbers of the first page on which the related system is shown.

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2003 TOYOTA TUNDRA (EWD491U)

256

K CONNECTOR LIST

1 2

GrayA 1

1

GrayA 2

213

GrayA 3

1 2

(2UZ–FE)A 4

1 2

(5VZ–FE) GrayA 4

9

19 20

11 12

3 4

21

13

5

22

214

1

1824

1716

6 87

25

15

23

10

BlackA 5

1 2

GrayA 6

1 2

GrayA 7

1 2 3 4

BlackA 8

1 2 3 4 5 6

BlackA 9

21

3 4

Dark GrayA10

21

YellowA11

21

YellowA12

21

A13

54321

BlackA15

1 2

YellowA16

1 2 3 4

YellowA17

1 2

BlackA18

1 23 4

GrayA19

1 2 3 4 5 6

BlackA20

35

1 2

GrayA22

1 2

GrayB 1

1 2

GrayB 2

35

1 2

B 3

1

2

B 4

1 23 4

BlackB 5

1 2 3

4 5 6 7 8

B 6

2 1

(Bench Seat)B 7

23 41

(*1)B 7

1 2

(w/ Power Seat)B 7

*1 : Separate Seat, Captain Seat (w/o Power Seat)

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2003 TOYOTA TUNDRA (EWD491U)

257

K

1 2

GrayC 1

1 2

(2UZ–FE) GrayC 2

1 2

(5VZ–FE) BlackC 2

1 2 3 4 5 6

7 8 9 101112

A

YellowC 4

242523 26222021 2827

1 2 3 4 5 6

7 8 9 1011121314151617

1819

A B

YellowC 5

1 2 3 4 5 6

7 8 9 101112

A

YellowC 6

1

2

C 7

1 2

GrayC 8

1 23 4 56 7 8

BlackC 9

1 2

C10

13987654321 101112

BlueC11

1611109854321 1213146 7 15

C12

13987654321 101112

BrownC13

10987654321

GrayC14

1 2 4 7 8

9 10 1112131415 16 17

5 63

C15

7 8

1 2

12

4 5 6

9 1110

3

BlackC16

1 2 3 4 5 6 7 8 9

10 11 12 131415 16 17 18

BlackC17

1 2

GrayC18

21

GrayD 2

1 2

(2UZ–FE) GrayD 3

1 2

(5VZ–FE) BlueD 3

1 2

(2UZ–FE) GrayD 4

1 2

(5VZ–FE) BlueD 4

1 2

GrayD 5

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2003 TOYOTA TUNDRA (EWD491U)

258

K CONNECTOR LIST

16 15 14 13 12 11 10 9

8 7 6 5 4 3 2 1

D 6

1 2 3

OrangeD 8

1 2

D 9

1 2

D10

1 2

BlackD11

1 2

D14

1 2

D15

1

D16

1

D17

1 2

GrayD18

1 2

D19

1 2

GrayD20

1 2

D21

3

1 2

GrayD22

3

1 2

GrayD23

1 2

3 4 5 6

D24

1 2 3 4

BlackD25

1 2 3 4

BlackD26

1 2

BlackD27

1 2

BlackD28

1 2

D29

1 2

BlackD30

1 2 3 4

5 6 7 8

(2UZ–FE) GrayE 1

1 2 3 4

5 6 7 8

(5VZ–FE) BlackE 1

21

(2UZ–FE) BlackE 2

21

(5VZ–FE) Dark GrayE 2

1

17

292827 3126

1918

98

20

10

21

30

11

76

13 14 15 16

22 23 24

12

432 5

25

(2UZ–FE)E 3

1 2 3 4 5 7

8 9 101112 15

1617 19 22

6

1314

202118

(5VZ–FE)E 3

16

3231 3528

2017

9 10

34

11

65

13 14 15

23 24 26

12

321 4

27

29

18

7

30

19

8

21 22 25

33

(2UZ–FE)E 4

1 3 4 5 6 9

10 12131415 19

20 22 24 28

7

1617

252623

2

11

21

8

18

27

(5VZ–FE)E 4

1

17

29 3228

1918

98

20

10

21

31

11

76

13 14 15 16

22 23 26

12

432 5

27

30

24 25

(2UZ–FE)E 5

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2003 TOYOTA TUNDRA (EWD491U)

259

K

1 2 3 4 5 6

7 8 9 101112

131415 1617

(5VZ–FE)E 5

1

19

333231 3528

2320

118 12

34

13

76

15 16 17 18

24 25 26

14

432 5

27

29

21

9

30

22

10

(2UZ–FE)E 6

1

16141312118

24222017

2

109

1918 21

15

23

3 4 5 6 7

(5VZ–FE)E 6

1

17

29 3428

1918

98

20

10

21

33

11

76

13 14 15 16

22 23 26

12

432 5

2724 25

30 31 32

(2UZ–FE)E 7

211716151410

31272622

1311

2523

18

28

19

29

20

30

12

24

1 2 3 4 5 6 7 8 9

(5VZ–FE)E 7

1 2

BrownF 1

1 2

BrownF 2

1 2 3

GrayF 3

1 2 3

GrayF 4

1 2

Dark GrayF 5

1 2 3 4 5 6 7 8 9 1011 12 13

14 15161718192021222324 25 26

F 7

1

2

F 8

1

2

F 9

1 2 3

4 5

Dark GrayF10

1

(2UZ–FE)G 1

1

(5VZ–FE)G 1

21

3 4

BlackG 2

1 2

G 3

1

2 3

BrownH 1

1

2 3

BrownH 2

1 23 4

Dark GrayH 3

21

3 4

Dark GrayH 4

1 23 4

Dark GrayH 5

21

3 4

Dark GrayH 6

1

BlackH 7

1

BlackH 8

21

3 4

Dark GrayH 9

1 32

H10

1 2 3 4 5 109876

BlackI 2

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2003 TOYOTA TUNDRA (EWD491U)

260

K CONNECTOR LIST

C

EE

CC

EE

CC

EE

BB

ED

BA

DD

A A

D

C

FF

CC

FF

CC

EE

BB

EE

BA

DD

A A

D

C

EE

CC

EE

CC

EE

BB

ED

BA

DD

A A

D

A B B C CA A B D D D C C

1 2 3 4

BlackI 3

1 2 3 4

BlackI 4

1 2 3 4

BlackI 5

1 2 3 4

BlackI 6

1 2 3 4

BlackI 7

1 2 3 4

BlackI 8

1 2 3 4

BlackI 9

1 2 3 4

BlackI10

1 2

BlackI11

1 2

BlackI12

1 2

BlackI13

1 2

(2UZ–FE) BlueI14

1 2

(5VZ–FE) BrownI14

1 2

(2UZ–FE) BlueI15

1 2

(5VZ–FE) BrownI15

1 2

(2UZ–FE) BlueI16

1 2

(5VZ–FE) BrownI16

1 2

(2UZ–FE) BlueI17

1 2

(5VZ–FE) BrownI17

1 2

(2UZ–FE) BlueI18

1 2

(5VZ–FE) BrownI18

1 2

(2UZ–FE) BlueI19

1 2

(5VZ–FE) BrownI19

1 2

BlueI20

1 2

BlueI21

1 2

BlueI22

1 2 3 4

5 6 7 8

I23

10111213 1718192021

1 2 3 4 5 6 7 8 9

141516

I24

643217 8 9 101112 14

513

I25

1

2

I26

A B B C CA A B D D D C C

BlueJ 1

BlueJ 2

A A

A A A A

J 3

C

EE

CC

EE

CC

EE

BB

ED

BA

DD

A A

D

J 4

J 5 J 7 J 8

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2003 TOYOTA TUNDRA (EWD491U)

261

K

A A A AA A A AA A A A

A A A A A A

B B B C C C

A A A A A A

B B B C C C

A A B B C C

D D E E F F

A A B B C C

D D E E F F

A A B B C C

D E F G H I

C

EE

CC

EE

CC

EE

BB

ED

BA

DD

A A

D

C

EE

CC

EE

CC

EE

BB

ED

BA

DD

A A

D

A A

A A A A

A B B C CA A B D D D C CC

EE

CC

EE

CC

EE

BB

ED

BA

DD

A A

D

J 9 J10 BlueJ11

J12 J13

A A B B C C

D E F G H I

OrangeJ14

OrangeJ15

A A A A

BlackJ16

BlackJ17

A A A A AA A A A A A A A

J18 BlackJ19

BlackJ20 J21

J22 GrayJ23

GrayJ24

1

(2UZ–FE)K 1

1

(5VZ–FE) BlackK 1

1

(2UZ–FE) Dark GrayK 2

1

(5VZ–FE) BlackK 2

1 2

GrayL 1

1 2

GrayL 2

1 2 3 4

L 3

54321

BlackM 1

1 2

3 4 5 6

BlackM 4

1 2

GrayN 1

1 2

BlackO 1

1

GrayO 2

3 2 1

O 4

1 2

3 4 5

O 5

1 2 3 4 5

6 7 8 9

GrayP 1

1

BlackP 2

21 3 4

YellowP 3

1

GrayO 6

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2003 TOYOTA TUNDRA (EWD491U)

262

K CONNECTOR LIST

1 2

GrayP 4

1

(A/T) BrownP 5

1 2

(M/T)P 5

1

2

P 6

1

2

P 7

1 32

P 8

1 2 3 4 5

P 9

1 2 3 4

5 6 7 8 9 10

P10

1 2

P11

1 2

P12

21

YellowP13

21

YellowP14

1 2

P15

1 2 3 4

5 6 7 8 9 10

BlackP16

1 2

BlueP17

1 2

P18

1 2

BlueP19

1

2

P20

1 2

3 4 5 6

P21

1 2

P22

1 2

3 4 5 6

R 1

1 2 3 4

5 6 7 8 9 10

R 2

1

2 3

R 3

1 2 34 5 6

GrayR 4

1 2 34 5 6

GrayR 5

1

2

R 6

1

2

R 7

12

34

56

(*2)R 8

123

(*3)R 8

12

34

56

(*2)R 9

123

(*3)R 9

1 2 3 4 5 6 7 8 9 10

R10

1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16 17 18 19 20

R11

1

(2UZ–FE)S 1

*2 : w/ Mirror Heater*3 : w/o Mirror Heater

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2003 TOYOTA TUNDRA (EWD491U)

263

K

*6 : Except Towing Package

1

(2UZ–FE)S 1

1

(5VZ–FE)S 1

1

BlackS 2

1 2

BlackS 3

1

3

2

4

(*4) BlueS 4

1

3

2

4

(*5) BrownS 4

1 32

S 5

123

S 8

1 32

S 9

1 2 3 4

BlackS10

1 23 4

GrayT 1

1 2 3 4 5 6

(2UZ–FE) BlackT 2

1 2 3 4

(5VZ–FE) BlackT 2

1 2 3 4 5 6

BlackT 3

1 2

5

3 4

6 7 8 9 10

T 4

1 2 34 5 6 7 8

T 5

1 2 3 4

(*6) BlackT 6

*4 : w/ Cruise Control*5 : w/o Cruise Control

4 5

21

3

6 7

(Towing Package) BlackT 6

1 2

T 7

1 2

T 8

1 2 3

4 5 6 7 8 9

T 9

1 2

GrayT10

1 2 3 4 5 6

7 8 9 10 11 12

T11

1 2 3 4 5 6 7 8 9 10 11

12 131415161718192021 22

T12

1 2 34 5 6 7 8

BlackT13

1 2

U 1

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264

K CONNECTOR LIST

1 2 3

BlackV 1

1 2 3

BlackV 2

1 2

BlackV 3

1 2

BlackV 4

12

BlueV 6

12

BlueV 7

1 2

BlueV 9

124 3

Dark GrayW 2

1

(2UZ–FE) GrayW 3

1

(5VZ–FE) GrayW 3

1 2 3

4 5

BlackW 4

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2003 TOYOTA TUNDRA (EWD491U)

265

MEMO

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L PART NUMBER OF CONNECTORS

Code Part Name Part Number Code Part Name Part Number

Note: Not all of the above part numbers of the connector are established for the supply.

2003 TOYOTA TUNDRA (EWD491U)

266

A 1 A/C Dual Pressure SW 90980–11149

A 2 A/C Magnetic Clutch 90980–11271

A 3 A/C Magnetic Clutch and Lock Sensor 90980–11016

A 4A/T Oil Temp. Sensor (2UZ–FE) 90980–11025

A 4A/T Oil Temp. Sensor (5VZ–FE) 90980–10498

A 5 ABS Actuator with ECU 90980–11861

A 6 ABS Speed Sensor Front LH90980–11075

A 7 ABS Speed Sensor Front RH90980–11075

A 8 Accel Position Sensor 90980–11150

A 9 ADD Actuator 90980–11858

A10 Air Fuel Ratio Sensor (Bank 1 Sensor 1) 90980–11178

A11 Airbag Sensor Front LH90980–11898

A12 Airbag Sensor Front RH90980–11898

A13 A/C Thermistor 90980–11918

A15 Air Inlet Control Servo Motor 90980–11909

A16Airbag Squib (Front Passenger AirbagAssembly) 90980–11884

A17 Airbag Squib (Steering Wheel Pad) 90980–12160

A18 Ashtray Illumination –

A19 ABS Speed Sensor Rear 90980–10942

A20 Accelerator Pedal Position Sensor 90980–11858

A22 ACC Cut Relay 82660–53010

B 1 Back–Up Light SW 90980–11250

B 2 Brake Fluid Level Warning SW 90980–11207

B 3 Back–UP Light Relay 82660–20340

B 4 Blower Motor 90980–10214

B 5 Blower Resistor 90980–10171

B 6 Blower SW and Defroster Mode SW 90980–10877

Buckle SW LH (Bench Seat) 90980–10824

B 7Buckle SW LH (Separate Seat, CaptainSeat (w/o Power Seat)) 90980–10795

Buckle SW LH (w/ Power Seat) 90980–10825

C 1 Camshaft Position Sensor 90980–10947

C 2Crankshaft Position Sensor (2UZ–FE) 90980–11162

C 2Crankshaft Position Sensor (5VZ–FE) 90980–10947

C 4 Center Airbag Sensor Assembly 90980–11873

C 5 Center Airbag Sensor Assembly 90980–11872

C 6 Center Airbag Sensor Assembly 90980–11871

C 7 Cigarette Lighter 90980–10760

C 8 Cigarette Lighter Illumination 90980–11148

C 9 Clutch Start Cancel SW 90980–11533

C10 Clutch Start SW 90980–10825

C11 Combination Meter 90980–11114

C12 Combination Meter 90980–11113

C13 Combination Meter 90980–11115

C14 Combination Meter 90980–11116

C15 Combination SW 90980–11672

C16 Combination SW 90980–12183

C17 Combination SW 90980–11594

C18 Cruise Control Clutch SW 90980–10906

D 2 Daytime Running Light Resistor 90980–10928

D 3

Detection SW (Transfer 4WD Position)(2UZ–FE) 90980–11250

D 3Detection SW (Transfer 4WD Position)(5VZ–FE) 90980–11156

D 4

Detection SW (Transfer L4 Position)(2UZ–FE) 90980–11025

D 4Detection SW (Transfer L4 Position)(5VZ–FE) 90980–11156

D 5 Detection SW (Transfer Neutral Position) 90980–10923

D 6 Data Link Connector 3 90980–11665

D 8 Diode (A/T) 90980–11071

D 9 Diode (Door Courtesy)90980–11608

D10 Diode (Idle–Up)90980–11608

D11 Diode (Power Window System) 90980–10962

D14 Door Courtesy Light LH90980–11148

D15 Door Courtesy Light RH90980–11148

D16 Door Courtesy SW Front LH90980–10871

D17 Door Courtesy SW Front RH90980–10871

D18 Door Courtesy SW Rear LH Lower

D19 Door Courtesy SW Rear LH Upper90980–11003

D20 Door Courtesy SW Rear RH Lower90980–11003

D21 Door Courtesy SW Rear RH Upper

D22 Door Key Lock and Unlock SW LH90980–11245

D23 Door Key Lock and Unlock SW RH90980–11245

D24 Door Lock Control SW RH 90980–10797

D25Door Lock Motor and Door UnlockDetection SW LH

90980–11150D26

Door Lock Motor and Door UnlockDetection SW RH

90980–11150

D27 Diode (Step Light)90980–10962

D28 Diode (Door Lock)90980–10962

D29 Diode (TVIP) 90980–11608

D30 Diode (Unlock Warning) 90980–10962

E 1Electronically Controlled TransmissionSolenoid 90980–10891

E 2Engine Coolant Temp. Sensor (2UZ–FE) 90980–10736

E 2Engine Coolant Temp. Sensor (5VZ–FE) 90980–10737

E 3Engine Control Module (2UZ–FE) 90980–12142

E 3Engine Control Module (5VZ–FE) 90980–11638

E 4Engine Control Module (2UZ–FE) 90980–12146

E 4Engine Control Module (5VZ–FE) 90980–11637

E 5Engine Control Module (2UZ–FE) 90980–12143

E 5Engine Control Module (5VZ–FE) 90980–11586

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L

Code Part Name Part Number Code Part Name Part Number

2003 TOYOTA TUNDRA (EWD491U)

267

E 6Engine Control Module (2UZ–FE) 90980–12145

E 6Engine Control Module (5VZ–FE) 90980–11476

E 7Engine Control Module (2UZ–FE) 90980–12144

E 7Engine Control Module (5VZ–FE) 90980–11421

F 1 Front Fog Light LH90980–11096

F 2 Front Fog Light RH90980–11096

F 3Front Turn Signal Light and Parking LightLH

90980–11020F 4

Front Turn Signal Light and Parking LightRH

90980–11020

F 5 Fuel Pump Resistor 90980–10901

F 7 4WD Control ECU 90980–11423

F 8 Front Door Speaker LH90980–10935

F 9 Front Door Speaker RH90980–10935

F10 Fuel Pump and Sender 90980–11077

G 1Generator (2UZ–FE) 90980–09365

G 1Generator (5VZ–FE) 90980–09212

G 2 Generator 90980–11964

G 3 Glove Box Light 90980–11148

H 1 Headlight LH90980–11314

H 2 Headlight RH90980–11314

H 3 Heated Oxygen Sensor (Bank 1 Sensor 1) 90980–10869

H 4 Heated Oxygen Sensor (Bank 1 Sensor 2) 90980–11028

H 5 Heated Oxygen Sensor (Bank 2 Sensor 1) 90980–10869

H 6 Heated Oxygen Sensor (Bank 2 Sensor 2) 90980–11028

H 7 Horn LH90980–10619

H 8 Horn RH90980–10619

H 9 Heated Oxygen Sensor (Bank 1 Sensor 2) 90980–11028

H10 High Mounted Stop Light and Cargo Light 90980–11296

I 2 Igniter 90980–11653

I 3 Igniter and Ignition Coil No.1

I 4 Igniter and Ignition Coil No.2

I 5 Igniter and Ignition Coil No.3

I 6 Igniter and Ignition Coil No.490980–11885

I 7 Igniter and Ignition Coil No.590980–11885

I 8 Igniter and Ignition Coil No.6

I 9 Igniter and Ignition Coil No.7

I10 Igniter and Ignition Coil No.8

I11 Ignition Coil No.1

I12 Ignition Coil No.2 90980–11246

I13 Ignition Coil No.3

I14 Injector No.1

I15 Injector No.2

I16 Injector No.390980–11153

I17 Injector No.490980–11153

I18 Injector No.5

I19 Injector No.6

I20 Injector No.790980–11153

I21 Injector No.890980–11153

I22 Ignition Key Cylinder Light 90980–10906

I23 Ignition SW 90980–11615

I24 Integration Control and Panel 90980–11125

I25 Integration Control and Panel 90980–10807

I26 Interior Light 90980–10935

J 1 Junction Connector90980–11714

J 2 Junction Connector90980–11714

J 3 Junction Connector 90980–10976

J 4 Junction Connector

J 5 Junction Connector

J 7 Junction Connector90980–11915

J 8 Junction Connector90980–11915

J 9 Junction Connector

J10 Junction Connector

J11 Junction Connector 90980–11714

J12 Junction Connector 90980–11915

J13 Junction Connector 90980–10976

J14 Junction Connector90980–11661

J15 Junction Connector90980–11661

J16 Junction Connector90980–11398

J17 Junction Connector90980–11398

J18 Junction Connector 90980–11542

J19 Junction Connector90980–11398

J20 Junction Connector90980–11398

J21 Junction Connector

J22 Junction Connector90980–11661

J23 Junction Connector90980–11661

J24 Junction Connector

K 1 Knock Sensor 190980–11166

K 2 Knock Sensor 290980–11166

L 1 License Plate Light LH90980–11162

L 2 License Plate Light RH90980–11162

L 3 Lumber Support Control SW (Driver’s Seat) 90980–10601

M 1 Mass Air Flow Meter 90980–11317

M 4 Mirror Heater SW 90980–10797

N 1 Noise Filter 90980–10843

O 1 O/D Direct Clutch Speed Sensor 90980–11156

O 2 Oil Pressure SW 90980–11363

O 4 O/D Main SW 90980–11470

O 5 Option Connector 90980–11603

O 6 Oil Pressure Sender 90980–11363

P 1 Park/Neutral Position SW 90980–11784

P 2 Power Steering Oil Pressure SW 90980–11428

P 3 Passenger Airbag Manual On–Off SW 90980–12017

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L PART NUMBER OF CONNECTORS

Code Part Name Part Number Code Part Name Part Number

Note: Not all of the above part numbers of the connector are established for the supply.

2003 TOYOTA TUNDRA (EWD491U)

268

P 4 Passenger Airbag Manual On–Off SW 90980–10906

P 5Parking Brake SW (A/T) 90980–10871

P 5Parking Brake SW (M/T) 90980–10825

P 6 Power Outlet90980–10760

P 7 Power Outlet90980–10760

P 8 Personal Light 90980–10908

P 9 Power Window Control SW RH 90980–10789

P10 Power Window Master SW 90980–10997

P11 Power Window Motor Front LH90980–10860

P12 Power Window Motor Front RH90980–10860

P13 Pretensioner LH90980–11862

P14 Pretensioner RH90980–11862

P15Power Seat Motor (Driver’s Seat FrontVertical Control) 90980–10825

P16 Power Seat Control SW (Driver’s Seat) 90980–10997

P17Power Seat Motor (Driver’s Seat RearVertical Control)

P18Power Seat Motor (Driver’s Seat RecliningControl) 90980–10825

P19Power Seat Motor (Driver’s Seat SlideControl)

P20Power Seat Motor (Driver’s Seat LumberSupport Control) 90980–10935

P21 Power Window Control SW (Back Window) 90980–10996

P22 Power Window Motor (Back Window) 90980–10860

R 1 Radio and Player 90980–10996

R 2 Radio and Player 90980–10997

R 3 Rheostat 90980–10216

R 4 Rear Combination Light LH90980–10988

R 5 Rear Combination Light RH90980–10988

R 6 Rear Door Speaker LH90980–10935

R 7 Rear Door Speaker RH90980–10935

Remote Control Mirror LH (w/ Mirror Heater) 90980–11452

R 8 Remote Control Mirror LH (w/o MirrorHeater) 90980–10907

Remote Control Mirror LH (w/ Mirror Heater) 90980–11452

R 9 Remote Control Mirror RH (w/o MirrorHeater) 90980–10907

R10 Remote Control Mirror SW 90980–11657

R11 Radio and Player 90980–12259

S 1Starter (2UZ–FE) 90980–09585

S 1Starter (5VZ–FE) 90980–09507

S 2 Starter 90980–11400

S 3 Step Light 81945–33010

S 4 Stop Light SW 90980–11118

S 5Seat Belt Warning Occupant DetectionSensor 90980–11296

S 8 Short Pin 90980–10907

S 9 Short Connector (TVIP) 90980–10908

S10Security Indicator and Glass BreakageSensor Microphone 90980–11013

T 1 Throttle Control Motor 90980–10942

T 2Throttle Position Sensor (2UZ–FE) 90980–11858

T 2Throttle Position Sensor (5VZ–FE) 90980–10711

T 3 Transfer Shift Actuator 90980–11858

T 4 Transmission Control Relay 90980–10801

T 5 Turn Signal Flasher 90980–10799

T 6Trailer Socket (Except Towing Package) 82824–34040

T 6Trailer Socket (Towing Package) 82824–34030

T 7 Tweeter LH90980–10906

T 8 Tweeter RH90980–10906

T 9 Trailer Converter 90980–11535

T10 TVIP Buzzer 90980–11051

T11 TVIP ECU 90980–11424

T12 TVIP ECU 90980–11392

T13 TVIP ECU 90980–10799

U 1 Unlock Warning SW 90980–10860

V 1 Vapor Pressure Sensor90980–11143

V 2 Vehicle Speed Sensor (Combination Meter)90980–11143

V 3Vehicle Speed Sensor (ElectronicallyControlled Transmission) 90980–11156

V 4 VSV (EVAP)90980 11156

V 6 Vanity Light LH90980–11368

V 7 Vanity Light RH90980–11368

V 9 VSV (Canister Closed Valve) 90980–11859

W 2 Washer Motor and Washer Level Sensor 90980–11177

W 3Water Temp. Sender (2UZ–FE) 90980–11428

W 3Water Temp. Sender (5VZ–FE) 90980–10359

W 4 Wiper Motor 90980–11599

Page 268: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

L

Code Part Name Part Number Code Part Name Part Number

2003 TOYOTA TUNDRA (EWD491U)

269

Page 269: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

1 2 3 4

1 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM

P ow er S ource

2

7

ACC

IG1

IG2

ST2

AM1 4

8

6AM2

2

1I2

2

22

1

2

5

3

2 2

2 2

2

1

1 B1A

3 EB1

N

6

P

1F7

1I4

1F101E5

3 B

1A

2B

4B

4

3

A

A

7 IA5

C C

IE Left kickpanel

A

2

2 EB1

1 EB14 EB1

A

2

22

11

1

9

B–L (*1 )

B (*2 )

WWB

W–R

WG

–R

B–W

W–B

W–B

W–B

B–R

B–OY

–GY

–G

Y–G(*4 )

Y–G

B–YBW

B–Y B–YP

B–Y

G–B

B–RW–R

B–R

B

W

B–L

B–Y

(M/T)

(*3 )(*3 )

(A/T )

PP

(A/T )

(A/T )

B–Y(M

/T )

STARTER

W

(M/T )

5AIGN

1 7

3 5

GENERATOR

J 1JUNCTIONCONNECTOR

J11JU

NC

TION

CO

NN

EC

TOR

Y–G

10AGAUGE

ST RE

LAY

7. 5A ALT–S

40A A

M1

140A ALT (*1 )

100A ALT (*2 )

S ta rting (5V Z –FE ) C harg ing

* 1 : Towing Package* 2 : Except Towing Package* 3 : w/ Daytime Running Light* 4 : w/o Daytime Running Light

J 8JUNCTIONCONNECTOR

30A A

M2

I23IGNITION SW

BATTER

Y

BW

A

Y–G

To IntegrationR

elay<7–3>

(*3 )

1

2 P 1

PA

RK

/NE

UTR

AL

PO

SITIO

N S

W

C10

CLU

TCH

STA

RT SW

W–B

(M/T )

W–B

(M/T )

(M/T )

PP

W–B

B–W

G–B

, G 2G 1 A B

C 9CLUTCH STARTCANCEL SW

, S 2S 1 A B

A

P

From Engine ControlModule<6–9>

+S IG

–S E

S B

IG

L

C12

CH

AR

GE

WA

RN

ING

LIGH

T[C

OM

B. M

ETE

R]

(A/T )

24 IA4

(M/T)

PP

B–W

1I3

5A STA

1F6

BTo EngineC

ontrol Module

<6–9>

B–WCC

C

P(* 6)

From TVIP

EC

U<

23–3>

(*5)

To TVIP

ECU

<23–3>

G–R

(*5 )

(*6 )

12 IE2

19 IE2

W–B

(A/T )

A B

A A

W–B

J23 J24,

JUNCTIONCONNECTOR

A B

W–B W–B

* 5 : w/ Wireless Door Lock Control* 6 : w/o Wireless Door Lock Control

J 2JUNCTIONCONNECTOR

Page 270: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

12

34

2 T

OY

OT

A T

UN

DR

A

Po

we

r S

ou

rce

2

22

12

53

22

22

2 1

1B

1 A3EB

1

N

6

P

9

B–L(*1) B (*2)W–R

W–B G–R

B–W

W–B

B–W

B

P

STAR

TER

5A STA

ST RELAY

30A ST3

Sta

rtin

g (

2U

Z–

FE

)

* 1

: Tow

ing

Pac

kage

* 2

: Exc

ept T

owin

g Pa

ckag

e*

3 : w

/ Wire

less

Doo

r Loc

k C

ontro

l*

4 : w

/o W

irele

ss D

oor

Lock

Con

trol

30A AM2

I23

IGN

ITIO

N S

W

BATT

ERY

P 1PARK/NEUTRALPOSITION SW

P

B–W

, S

2S

1A

B

A

24IA

4

7IG

2

ST2

8

AM2

12IE

1

CC EAFr

ont l

eft

fend

er

AA

J 2

JUN

CTI

ON

CO

NN

EC

TOR

J18

JUN

CTI

ON

CO

NN

EC

TOR

J20

JUN

CTI

ON

CO

NN

EC

TOR

W–R

G–Y

G–Y

W–B W–B W–B

A

A

P P

P P ( *3)

(*4)

From

Eng

ine

Con

trol

Mod

ule(

STA)

<5–

14>

To T

VIP

EC

U<

23–3

>

From TVIP ECU<23–3>

To Engine ControlModule(STAR)<5–10>

To Engine ControlModule(NSW)<5–10>

G–R

(*3)

(*4)

W–B

W–B

To E

ngin

e C

ontro

lM

odul

e(S

TSW

) <5–

14>

1I3

1F6

B

B–W

Page 271: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

1 2 3 4

3 TOYOTA TUNDRA

2

2

7 6

1I4

21 IE1

1J7

2

1 1 3

4 2

1 3

4 2

1 3

4 2

1 3

4 2

1 3

4 2

1 3

4 2

1 3

4 2

1 3

4 2

From Engine Control Module<5–13><5–14>

BR BR BR BR BR BR

L–B L–B L–B

L–W L–W

To Engine Control Module<5–13>

BATTERY

2

1

I23IGNITION SW

B–R

W–R

B–L (*1 ) B (*2 )

B–R

B–R

B–R

B–R

B–R

BR

BR

L–B

BR

L–W

BR

L–W

BR

L–B

BR

L–W

BR

L–B

BR

L–B

BR

L–W

B–R

B–R

B–R

B–R

LG

R–W

P–L

G–W

B–L

G–B

LG–B

G–R

BR

L–B

L–W

P ow er S ource Ign ition (2UZ –FE )

30A AM

2

B–R

IG2

ST2

6AM2

B–R B–R B–RB–R

EC Rear bank ofleft cylinder head

I 4IGN

ITER

AN

DIG

NITIO

N C

OIL N

O. 2

I 5IGN

ITER

AN

DIG

NITIO

N C

OIL N

O. 3

I 6IGN

ITER

AN

DIG

NITIO

N C

OIL N

O. 4

I 7IGN

ITER

AN

DIG

NITIO

N C

OIL N

O. 5

I 8IGN

ITER

AN

DIG

NITIO

N C

OIL N

O. 6

I 9IGN

ITER

AN

DIG

NITIO

N C

OIL N

O. 7

I10IG

NITE

R A

ND

IGN

ITION

CO

IL NO

. 8

I 3IGN

ITER

AN

DIG

NITIO

N C

OIL N

O. 1

N 1

NO

ISE FILTE

R

BR

* 1 : Towing Package* 2 : Except Towing Package

B–RB–RB–RB–R

L–W

B–R

Page 272: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

12

34

4 T

OY

OT

A T

UN

DR

A

7IG

2

ST2

6A

M2

2

1I4

1J7

30A

AM

2

2

1IE

1

21

21

21

21

ED

Inta

ke m

anifo

ld le

ft

12

37

65

489

12

10

W–R B

B–R

B–R

B–R

B–R W–G

L

R W–B

BR

B–R

B

B–RB–R

B–R

I 2 IGN

ITER

B–Y

LG

R–L

B–L

I23

IGN

ITIO

N S

W

BATT

ERY

I11IGNITION COIL NO. 1

I12IGNITION COIL NO. 2

I13IGNITION COIL NO. 3

N 1NOISE FILTER

To E

ngin

e C

ontro

l Mod

ule

<6–

9><

6–10

>

To Combination Meter<29–3>

Po

we

r S

ou

rce

Ign

itio

n (

5V

Z–

FE

)

B–R

B–R

W–B

Page 273: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

MEMO

Page 274: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

34

21

( Con

t. n

ext

page

)5

TO

YO

TA

TU

ND

RA

10A ETCS

30A AM2

50A J/B

15A EFI NO. 1

222

2

22

2

2

2

1

1

1

15 3

2 1

22

22

Fron

t lef

t fen

der

EA

3 5

2 1

4

3 5

2 1F/PMP RELAY

22

22

C/OPN RELAY

22

EFI RELAY

22

2 IA4

5

BB

13

54 M BB

112

IFLe

ft ki

ck p

anel

26IA

4

EC

Rea

r ba

nk o

fle

ft cy

linde

r hea

d

21

CG

SG

SIL

B–L(*1) B (*2)

W–GY

W–R

W–G

B–R

B–R

W–B

Y

B–W

YB–W

W–L

L–O L–O L–O W–B W–B

W–B

BR

W

BR

B–L

Y

D75

4

AA

D

B–R

I23

IGN

ITIO

N S

W

BATT

ERY

J 3

JUN

CTI

ON

CO

NN

EC

TOR

J 5

JUN

CTI

ON

CO

NN

EC

TOR

Po

we

r S

ou

rce

En

gin

e C

on

tro

l ( 2

UZ

–F

E)

140A ALT(*1)100A ALT(*2)40A AM1

2 7

AC

C

IG1

IG2

ST2

AM1

4 6AM

2

2

2 1 2 1

W

B–Y

W

25IE

1

From

AB

SA

ctua

tor

with

EC

U<

16–3

>

From

Cen

ter

Airb

ag S

enso

rA

ssem

bly<

17–4

>

From CenterAirbag SensorAssembly<17–4>

W

D

D

W–G

W–G

W–G

J 8

JUN

CTI

ON

CO

NN

ECTO

R

B–L

16 BAT

D 6

DAT

A LI

NK

CO

NN

EC

TOR

3

From ABS Actuatorwith ECU<16–3>

W

D

B–W

F 5

FUEL

PU

MP

RE

SIS

TOR

F10FUEL PUMP

L–B

L–O

W–B

B–W

DD

W–G

D

13

TC

15 WFS

E

L–W

B–YFrom Center AirbagSensor Assembly<17–4>

W–L

TS

1211

A/B From ABS Actuator

with ECU<16–4>

7. 5

AO

BD

2

5A ECU

–B

12

12

43

DA

FB

17IA

5

8IE

1JUNCTIONCONNECTOR

BAJ21 J22,

W–R

W–R

G–Y G–Y

SHORT PINB

2 1

W–R

W–R

(*4)

(*3)

A22

ACC

CU

TR

ELA

Y

W–L

B–Y

W–L

W–R(*3)

L–R

A B C F G H I J K L M

W–G W Y

L–W

B–WB–RB–Y

B–R

W–G

B–Y

G–Y

W–L

D E

* 1

: Tow

ing

Pac

kage

* 2

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ept T

owin

g P

acka

ge

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1K2

AA

J18JUNCTIONCONNECTOR

W–B

9IA

4 L–R

3L–

R

2 2

L–O

* 3

: w/ D

oor

Lock

Con

trol

* 4

: w/o

Doo

r Loc

k C

ontro

l

Page 275: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M5 TOYOTA TUNDRA (Cont’ d) (Cont. next page)

5 6 87

1 IA5

6 B

10 A18 A2 A A201 A27 E 33 D 22 D D4 23 D

1 E

1

2

3 E

1

2

5 E

1

2

6 C

1

2

2 E

1

2

4 E

1

2

3 D

1

2

5 C

1

2

4 1I

5AIGN

8 A 3 A

1J7

11 1F

1K6

9 A

IE13

33 E

B–L

B–O

B–O

B–R

B–Y

W

W–G

W–L

W–L

L–W

B–O

W–G

R G L L–RB

–R

B–R

B–R

B–R

B–R B–R

W–G

B–R

B–Y

B–R

Y WY–GR

B–W

1 3

2 4 2

B

B

B–RB–R

B–R

B–RB

–R

B–R

B–R

B–R

R–WYR–B

W

R

B–W

B

G–Y

1 3

4

R

B–W

R

OX1AHT1AOX2AHT2AFCSILTC+B2+BCCVIGSW FPR

R

R

I14IN

JEC

TOR

NO

. 1

I16IN

JEC

TOR

NO

. 3

I18IN

JEC

TOR

NO

. 5

I20IN

JEC

TOR

NO

. 7

I15IN

JEC

TOR

NO

. 2

I17IN

JEC

TOR

NO

. 4

I19IN

JEC

TOR

NO

. 6

I21IN

JEC

TOR

NO

. 8(*5 )

(*5)

H 5

HEA

TED

OXY

GE

N S

ENS

OR

(Bank 2 Sensor 1 )

H 3

HEA

TED

OXY

GE

N S

ENS

OR

(Bank 1 Sensor 1 )

E 3 E 4,

ENGINE CONTROL MODULE

A B E 5, C E 6, D

E ngine C on tro l (2UZ –FE )

13 B

PI

B–R

R

* 5 : Shielded

11 A

W

V–G

6 IA4IA415

B–O

+B E1

OXHTR HTL OX2

+B E1

MREL BATT +BM #1 #3 #5 #7 #2 #4 #6 #8

19 A

L–W

WFSE

23 IE1

8 EA1

B–L

16 IE1

B–R B–R

14 IA4

2

10AEFINO. 2

2

W–L

R

R

W–L

R

W–L

R

W–L

B

A A

BB

A

J 8JU

NC

TION

CO

NN

EC

TOR

1I2

2

1

10AGAUGE

1F5

9 A

9 C

B–Y

B–Y

IE11

R

MALFU

NC

TION

IND

ICA

TOR

LAMP

CR

UIS

E

8 C

C11

C13

,

CO

MB

INATIO

N M

ETER

AC

R

J 1JU

NC

TION

CO

NN

EC

TOR

H A

H B

F B

G A

2

1

RL–W

JUN

CTIO

NC

ON

NE

CTO

R

BA

J14J15

,

JUN

CTIO

NC

ON

NE

CTO

R

BA

J14J15

, V

9V

SV(C

anister C

losed Valve )

W–G

B–L

W

L–W

Y

A

B

C

D

E

F

G

H

I

J

K

L

M

B–R

B–R

B–Y

W–G

B–W

B–Y

G–Y

W–L

15 E

ACCR

A

B

C

D

E

B–O

BR

J 5JU

NC

TION

CO

NN

EC

TOR

B

B–W

V–G

B–R

B–R

18 IA4

L–W

E 7, E

B–L

L–W

Page 276: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

11

12

109

5 T

OY

OT

A T

UN

DR

A

EB

Rea

r ban

k of

right

cyl

inde

r hea

d

4C

7C

6E

7E

11

2D

1D

R

20E

29E

30E

28E

21

19E

G–B

21E

31E

E18

Y–G

B–Y

R–W

B–W B–W

R

15

423

BR BR

GR

B

K 1KNOCK SENSOR 1

K 2KNOCK SENSOR 2

B

GR

L

G

W–B

W–B

W–B

W–B

GB–W

B–W

B–Y

P–L

KNK1

KN

K2M

E01

E03

E02

E01

G–B

B–W

3T 2THROTTLE POSITIONSENSOR

64

5

25C

C32

C27

21

( *5)

(*5)

(*5)

( *5)

( *5)

Y

12

C 1

CA

MS

HA

FT P

OSI

TIO

NS

ENSO

R

C 2

CR

AN

KS

HA

FT P

OSI

TIO

NS

ENS

OR

(*5)

(*5)

M 1

MA

SS

AIR

FLO

W M

ETE

R

E 2ENGINE COOLANTTEMP. SENSOR

B–WD

, E

6C

, E

5B

A

ENG

INE

CO

NTR

OL

MO

DU

LE

, E

4E

3En

gin

e C

on

tro

l ( 2

UZ

–F

E)

B–W

B

B–O

A

4B

16E

To Detection SW(Transfer L4 Position)<18–4>

From Park/NeutralPosition SW<2–3>

W–B

L–R

G2

G2–

NE

+

L4N

SWTH

AE2

GVG

E2

THW

VTA1

VTA2

VC

C24

NE

D25

21D

D5

29D

C1

Rea

r ba

nk o

fle

ft cy

linde

r he

adE

C

2C

C3

17C

W

R

BR

B–W

BR

R

B–W

R

B–W

W

R–Y

B

13

13

24

42

BR BR BR

E1O

X1B

HT1

BO

X2B

HT2

B

21

BR B

R( *

5)

H 4HEATED OXYGENSENSOR(Bank 1Sensor 2)

H 6HEATED OXYGENSENSOR(Bank 2Sensor 2)

Y–B

B–W

2 1

R W–G

V 4VSV(EVAP)

34E

(*5)

BR

+BE

1

HTR

2O

XR2

HTL

2O

XL2

+BE

1

12A

2B

G–Y

L–Y

To Integration Controland Panel<30–3>

33B

L–B

From Diode (Idle–Up)<9–4>

BR(*5)

GE0

1M

–M

+P

RG

ELS

ACLD

AC

MG

C D E

BR B–W R

A B C

AAA

J19JUNCTIONCONNECTOR

3E

C2

2EC

21

EC2

BR

DB–

W

B–O

B–W

G–B

G–B

9D

From Park/NeutralPosition SW<2–3>

W–B

STA

R

( Con

t. n

ext

page

)

E,

E 7

* 5

: Shi

elde

d

M–

M+

VTA1

VTA2

VCE2

(*5)

R

Page 277: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

15 161413

5 TOYOTA TUNDRA (Cont’ d)

E24

To Igniter and Ignition CoilNo. 1, No. 2, No. 3, No. 4No. 5, No. 6, No. 7 and No. 8<3–2><3–3><3–4>

L–B

L–W

G–W

P–L

R–W

R–L

R–L

22 IE1

18 IE1

A21

E23 E8 E9

LG–B

G–R

V 1VAPOR PRESSURE SENSOR

25 E

G–B

G–B

B–W

B–W

2 3 1

G–B

B–L

LG

12 E 26 E 13 E 10 EE11 19 B

12 C

BFrom

”STA”

Fuse<

2–3>

E ngine C on tro l (2UZ –FE )

17 B

G–O

5 A

L–W

To C

ombination M

eter<

29–3>

From S

top Light SW<

13–4>G

–W

4

3

12 BB

–OL–B

RES/ACC

SET/COAST

CANCEL

EC Rear bank ofleft cylinder head

5 IE1

5

4

BR

C16CRUISE CONTROL SW[COMB. SW]

C ru ise Con trol(2U Z–F E)

ECC

CCS

CR

UISE

IGF1 IGF2 IGT2 IGT1 IGT3 IGT4 IGT5 IGT6 IGT7 IGT8 STP

PTNK STSW SPD TACH STI–

S 4

STO

P LIGH

TS

W

1

2

See Stop LightSystem<13–4>

From Igniter and

Ignition Coil

No. 1, N

o. 2, No. 3, N

o. 4N

o. 5, No. 6, N

o. 7 andN

o. 8<3–4>

A

B

C

DB–W

B–O

B–W

G–B

D, E 6C, E 5BA

ENGINE CONTROL MODULE

, E 4E 3

E A

H B I B G B

D A F A

R–L

G–B

B–W

B

B

23 C 24 B

2 II1

LCK1 CCS

14 A

1 II1

From C

enterA

irbag SensorA

ssembly<

17–3>

17 E

To Park/N

eutralP

osition SW

<2–3>

P

STA

15 IE1

B

G–W

B–W

1

2

SSR+

SSR–

A 3

A/C

LOC

K SE

NS

OR

F/PS

R–B

R–B

A/CS

LTo Integration C

ontroland Panel<

30–5>

B31 8 D

To AD

D D

etectionS

W<

18–6>G

R

4WD

EAFront leftfender

A

A

C

C

2

1

17 IA4

1 B

L–WW

–L

W–B

W–B

W–B

J 2JUNCTIONCONNECTOR

J18JUNCTIONCONNECTOR

HP

A 1A/C

PR

ES

SUR

E SW

G

BR

26 A28 A23 A27 A29 A

A20ACCEL PEDAL POSITION SENSOR

2 1 3 5 4

EPA2 VCP2 VPA2 EPA VCPA

LG–R

G–R L

V–R

P–G

22 A

6

VPA

R–G

EPA2 VCP2 VPA2 EPA VCPA VPA

JUN

CTIO

NC

ON

NEC

TOR

BA

J14J15

,

B–W B–W

B–L

B–W

G

E, E 7

B–WJ 9JU

NC

TION

CO

NN

EC

TOR 1

2

32 B

THE

B

A13

A/C

THER

MIS

TOR

B–L

B–W

B–W

Page 278: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

12

34

6 T

OY

OT

A T

UN

DR

A( C

ont.

nex

t pa

ge)

2

ACC

IG1

IG2

ST2

AM

14 6

7A

M2

22

22

2

40A AM1

15A EFI NO. 150A J/B

100A ALT

30A AM2

1I4

1J7

1F11

3IE

1

12

53

22

22

EA

Fron

t lef

t fen

der

12

53

22

22

14IA

4

1K2

1B4

9A

8C

5IA

426

IA4

3B

B1

IFLe

ft ki

ckpa

nel

ED

Inta

ke m

anifo

ld le

ft

15IE

1

IA46

75

4

B

11

1

11

16

B

A

22

22

2

DD

D

B–Y

B–Y

W–LR

B–R

W W–L Y

B–O

( *2)

B–R

W–B

B

W–R

W

B–R

W–G

B–O(*2)

B–R B–R

W–B W–B

L–OL–O

Y

W–L

V–GB–Y

W–L

W–L

YW–G

BR

W

W–B

W–B

W

W–B

W–B

W–L

B–R

B C D E H K L M N

En

gin

e C

on

tro

l ( 5

VZ

–F

E)

Po

we

r S

ou

rce

I23

IGN

ITIO

N S

W

BA

TTE

RY

C/OPN RELAY

EFI RELAY

12B

B1

54 M

A

W–BL–O

F10

FUE

LP

UM

P

7. 5

AO

BD

W–G

F JV

–G

J 1JUNCTION CONNECTOR

B–R

J 3

JUN

CTI

ON

CO

NN

EC

TOR

B–Y

B–R

B–R

W–L

W–L

W–L

B–R

CG

SGS

IL

BAT

From Center AirbagSensor Assembly<17–4>

From ABS Actuatorwith ECU<16–3>

From Center AirbagSensor Assembly<17–4>

B

Y

D 6

DA

TA L

INK

CO

NN

ECTO

R 3

D

WFrom ABS Actuatorwith ECU<16–3>

J 5

JUN

CTI

ON

CO

NN

ECTO

R

13

TC

W–G

W–G

D

From ABSActuator withECU<16–4>

11

12

A/B

TS

W–L

B–Y20

IE1 W–G

From CenterAirbag SensorAssembly<17–4>

* 1

: w/ C

ruis

e C

ontro

l

1K6

OB

–O( *

1)

1I2

1F5

10A

GA

UG

E

B–Y

B–O(*1)

B–W

W–G

W–G

DD

22

10A

EFI

NO

. 2

IA4

18W

–L

AA

J18JUNCTIONCONNECTOR

W–B

W–L

* 2

: w/o

Cru

ise

Con

trol

* 3

: Mal

func

tion

Indi

cato

r Lig

ht

IE1

13W

–L

2

15A ETCS

1IA

5

W–G

A

W–GW–G

5A IGN

J 8

JUN

CTI

ON

CO

NN

EC

TOR

D

15WFS

E

IL–

W

L–W

W–L

1F9

G

B–Y

B–Y

B–W

9C

Y

PY

(*3)

CRUISE

C11

C13

,

CO

MBI

NA

TIO

NM

ETER

AC

Page 279: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

5 6 7 8

6 TOYOTA TUNDRA

H

D

C

B

7 D 10 E 12 E 13 E 19 D14 D

2

1

11 E 18 E

2 EF1

2

1

1 EF1

15 E 25 E

IE126

24 E

IE119

16 A

14 A 2 A 1 A 22 A 6 D 5 D 4 D 3 D 1 D 8 D 21 E 14 E 27 D 29 E

4 BD1 2 BD1

1 BD1

14 IE1

1 EE1 3 EE1 2 EE1

1 1

23 E 22 E

23

43432

2

2

1

15

1 3

3 1 4

G–B

W–L

R

W

V–G

W–L

Y

B–RBR

B–W B–W B–W B–W B–W

W–L

W–L

G–W

R–Y

Y–G

W–L

W–L

B–W

B–W

G–Y

G–Y

BR

–BB

–W

B–W

B–Y

G–B

G–B

G–B

R–L

G–W

L–WL–W

W–L

B–R

W V–G

W–L

Y R W G R–B L Y

W–L

Y V

R R–W

BR

R

R–W

BR

W–L

BR BR

BRB

R

B GR

B GR

BR

BR

E ngine C on trol (5VZ –FE )

SIL W +B FC #10 #20 #30 #40 #50 #60 HTAF1 AF1+ OX2B HT2B KNK1 KNK2

BATT CCVEVP1PTNKVCVTATHWE2THAVGE2GTC

1

M 1

MA

SS A

IR FLO

W M

ETE

R

E 2EN

GIN

E C

OO

LAN

TTE

MP

. SE

NS

OR

T 2THROTTLEPOSITIONSENSOR

V 4

VS

V (EV

AP)

4

A10AIR

FUE

L RA

TIO SE

NSO

R(B

ank 1 Sensor 1 )

BR

BR

(Shielded )

(Shielded )

(Shielded )

(Shielded )

K 2KN

OC

K SE

NSO

R 2

K 1KN

OC

K SE

NSO

R 1

H 9HEATED OXYGENSENSOR(Bank 1 Sensor 2)

, E 5E 4 B C , E 6 D , E 7 E ENGINE CONTROL MODULE

2

1

2

1

2

1

2

1

2

1

2

1I14IN

JEC

TOR

NO

. 1

I15IN

JEC

TOR

NO

. 2

I16IN

JEC

TOR

NO

. 3

I17IN

JEC

TOR

NO

. 4

I18IN

JEC

TOR

NO

. 5

I19IN

JEC

TOR

NO

. 6

B–R

B–R

B–R

B–R

B–R

B–R

B–R

B–R B–R B–R

B–O(*2)

A15

IGSW

B–O

(*2 )

EB–Y

A4

MREL

B–Y

26 E

AF1–

P

(Shielded )

P

+B AF–

HT AF+

OX HT E1

+B

15 IA4

3 BD1

F

W–G

W–G

K

L

M

N

B–R

J

OB–O(*1)

W–GA

IL–W

E2

VTA VCVTA2

2

R–B

8 A

W–G

+BM

4 C

VTA2

A 8

AC

CE

L PE

DA

LS

EN

SO

R

10 C 15 C

3 4 1

VPA VPA2 VC

VPA VPA2

R–W R G–B

E2

2

B–W

B–WB–W GB

FA

J14 J15,

JUNCTIONCONNECTOR

A B

B B

J 5JUNCTIONCONNECTOR

B–O(*1)

I B H B

D A E A

G–B

R–L

JUN

CTIO

NC

ON

NE

CTO

R

BA

J14J15

,

24 IE1

(Shielded )

25 IE1

R

13 A

WFSE

L–W

B

BR

BR

PY

G

AB–Y

CY

(Cont. next page)

DB–O

B–O(*1)

B–O

(*1 )

W–L

H A

E B

F B

G A

R

L–W

2

1 V 9VS

V(C

anister Closed Valve )

JUN

CTIO

NC

ON

NE

CTO

R

BA

J14J15

,

JUN

CTIO

NC

ON

NE

CTO

R

BA

J14J15

,

R

V 1VAPORPRESSURESENSOR

IE122

R–L

23 IE1

R–W

B–Y

B–Y

G–B

E 3 A ,

16 IE1

B

* 2 : w/o Cruise Control* 1 : w/ Cruise Control

BR

(*1)

Page 280: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

910

11

12

6 T

OY

OT

A T

UN

DR

A (

Con

t’d)

7A

11D

10D

9D

2D

6A

12D

21D

13D

17D

4E

5E

EDIn

take

man

ifold

left

7E

18D 1

12

B

B–L

R–L

LG

B–Y

G–O

G

R

Y

L L

W–B

W–B

W–B

W–B

Y–R

En

gin

e C

on

tro

l ( 5

VZ

–F

E)

E1

E01

E02

E03

PSW

G2

NE–

NE+

SP

1IG

FIG

T3IG

T2IG

T1S

TA

(Shielded)

(Shielded)

From ” STA” Fuse<1–1>

To Combination Meter<29–3>

From Igniter<4–2><4–3>

P 2POWER STEERINGOIL PRESSURE SW

B2

L4

To Detection SW(TransferL4 Position)<19–3>

L–R

3A

9A

AC

TAC

1 L–Y

L–BTo IntegrationControl and Panel<30–3>

11B

To Detection SW(TransferNeutral Position)<19–4> TF

NR–Y

4WDTo ADD Detection SW

<19–3>GR

13B

8EE04

(4WD A/T)

BR

(4WD A/T)

(4WD)

12

C 2CRANKSHAFTPOSITION SENSOR

C 1CAMSHAFTPOSITION SENSOR

R

Y

BR

6E

ME

01 BR

B

, E

5E

4B

C,

E 6

D,

E 7

EE

NG

INE

CO

NTR

OL

MO

DU

LE

BR

8C

2C

9E

31E

17E

12

34

M–

M+

CL+

CL–

T 1

THR

OTT

LE C

ON

TRO

L M

OTO

R

GE

01M

–M

+C

L+C

L–

R

G

Y

L

BR

AB–

Y

CY

Cru

ise

Co

ntr

ol

( 5V

Z–

FE

)

EE 21

25B

17A

9B

22B

( A/T

)

See

Ele

ctro

nica

llyC

ontro

lled

Tran

smis

sion

and

A/T

Indi

cato

rS

yste

m<

15–4

>

C18

CR

UIS

E C

LUTC

H S

W

W–RB–YB–Y

J 8

JUN

CTI

ON

CO

NN

EC

TOR

(M/T) (M/T) D

PIS

T1–

CC

S

DB–

O

L–R B–O

Y

G

17IE

1

ED

Inta

ke m

anifo

ldle

ft

BR BR

3

5

C16

CR

UIS

E C

ON

TRO

L S

W[C

OM

B.

SW

]

B3

A20

(A/T)

STP

NSW

From Stop Light SW<13–4>

To Park/NeutralPosition SW<1–2>

G–W

P

A21

F/P

SFrom Center AirbagSensor Assembly<17–3>

R–B

, E

3A

G

(Shielded)

(Shielded)

CR

UIS

E

RE

S/A

CC

SET/

CO

AST

CA

NC

EL

EP

CC

S

See

Sto

p Li

ght

Sys

tem

<13

–4>

134

2

S 4STOP LIGHT SW

( *1)

(*1) (*1)

* 1

: w/ C

ruis

e C

ontro

l

Page 281: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

1 2 3 4

7 TOYOTA TUNDRA

Head ligh t (w / Daytime Running L igh t)

1

2

5

3

2 2

2

2

ACC

IG1AM1 4

B–L (*1 ) B (*2 )

I23IGNITION SW

140A ALT (*1 )100A ALT (*2 )

BATTERY

2

1

1C6

1K5

2

2 2 2 2

2

2 2 22

A

A

B

B

EAFront left fender

2

1

5

3

2 2

2 2

TAIL

OFF

HIGH

LOW

HEAD

FLASH

LIGH

TC

ON

TRO

LS

WD

IMM

ER S

W

16

13 7

C15COMBINATIONSW

8

IIRight kickpanel

IF

W–B

W–G

G

W–G

W–G

W

R R–B

R–B

R–B

R–B

BR

R–G

VGR

W–B

R–WLR–L

G–W

B–Y

W–G

W–B

W–B

DRLNO. 4RELAY

J 3JUNCTIONCONNECTOR

J 2JUNCTIONCONNECTOR

J 2JUNCTIONCONNECTOR

11 1 1 1

9

3 3 2 24 5 2

A

B

40A AM

1

10A HE

AD LL

10A H

EA

D LH

10A HE

AD R

R

10A HE

AD R

H

1 2 1 2

33

A A

2

* 4 : w/o Wireless Door Lock Control* 3 : w/ Wireless Door Lock ControlP ower S ource

H 2

HE

ADLIG

HT R

H

H 1

HEA

DLIG

HT LH

2

H–LPRELAY

2

1

D 2DAYTIME RUNNINGLIGHT RESISTOR

RR

W–B

Y–B

W–G

R–B

R–B

R–B

R

5AECU–IG

W–G

W–G

W–G

G–B

Y–G

H EL T HF HL HU

2

1

6

W–B

See C

ombination

Meter S

ystem<

29–6>

2

1

50A J/B

DIM

MER

RELAY

2

1K2

15ATAIL

1K4

3 1J

4 1J

IHRightkickpanel

7 A

16 B

1J8

C

C

G–Y

(*4 )

W–B

R–W

F

F

J13JUNCTIONCONNECTOR

BR

A B

A A

IELeft kickpanel

Left kickpanel

G–Y

G–Y

3

J 7JU

NC

TION

CO

NN

ECTO

R

FG–Y

To TVIP

EC

U<

23–3>

R–W

R–W

JUN

CTIO

NC

ON

NEC

TOR

BA

J23J24

,

W–B

A

W–B

J 8JU

NC

TION

CO

NN

EC

TOR

B–Y

W–G

INTEGRATION RELAY

(2UZ–FE)

(5VZ–FE)

AJ18JUNCTIONCONNECTOR

A

A

HIG

H BE

AM

IND

ICA

TOR

LIGH

T[CO

MB

. ME

TER

]

BA

C11

C12

,

* 2 : Except Towing Package* 1 : Towing Package

From Fog Light S

W[C

omb. S

W]2–2>

From G

enerator<

1–4>

(*3)

1O3 15 1N 6 1O 3 1N 8 1N 7 1N 24 1N

(*3 )(*3 )

9 IA5

Y–B

8

13 1N 1 1N

2 1I

1N21O51O4

Page 282: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

12

34

8 T

OY

OT

A T

UN

DR

A

2

B–L(*1) B (*2)

BATTERY140A ALT(*1)100A ALT(*2)

B–L(*1) B (*2)

21

35

22

1C6

1K5

1C7

H–L

PR

ELA

Y

TAIL

OFF

HIG

H

LOW

HE

AD

FLA

SH

EL

HT

HF

HL

LIGHTCONTROLSW

DIMMER SW

HU

C15

CO

MB

INA

TIO

NSW

138

1617

7

IFLe

ft ki

ck p

anel

AJ

3JU

NC

TIO

NC

ON

NE

CTO

R

W–B

R R

R R

2

10A

HEA

D L

H10

AH

EA

D R

H

22

21

33

AA

12

AB

B B

R–B

R–G

R–Y

32

11

R–L

R–W

J 2

JUN

CTI

ON

CO

NN

ECTO

R

R–Y

R–G

1K4

1J3

1J4

R–G

AAA

J11

JUN

CTI

ON

CO

NN

EC

TOR

R–Y

R–Y

R–G

W–BR–G

R–G

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R–Y

1110

12

53

22

22

20A

FOG

1 2

2

G–R

R–Y

C15

FOG

LIG

HT

SW [CO

MB.

SW

]

G–R

L–R

D EA

Fron

t lef

t fen

der

21

21

AAA

AW

–B

W–B

W–B

W–B

W–B

W–B

P

P

P

DD

J 2

JUN

CTI

ON

CO

NN

EC

TOR

P

F 1

FRO

NT

FOG

LIG

HT

LH

F 2

FRO

NT

FOG

LIG

HT

RH

J18

JUN

CTI

ON

CO

NN

EC

TOR

FOG

RE

LAY

H 1

HE

AD

LIG

HT

LH

H 2

HE

ADLI

GH

TR

H

Po

we

r S

ou

rce

He

ad

ligh

t ( w

/o D

ay

tim

e R

un

nin

g L

igh

t)F

og

Lig

ht

( w/o

Da

yti

me

Ru

nn

ing

Lig

ht)

* 1

: Tow

ing

Pack

age

* 2

: Exc

ept T

owin

g P

acka

ge2 1

1L6

1L5

INTEGRATIONRELAY

F

To TVIP ECU<23–3>

FG

–Y

G–Y

G–Y

F

G–Y

J 7

JUN

CTI

ON

CO

NN

ECTO

R

G–Y(*4)

16B

7A

AB

AA IE

Left

kick

pane

l

W–B

C11

C12

,

HIG

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EAM

IND

ICAT

OR

LIG

HT

[CO

MB

. M

ETE

R]

AB

8IA

5

9IA

5

* 3

: w/ W

irele

ss D

oor L

ock

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trol

* 4

: w/o

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less

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r Loc

k C

ontro

l

J23

J24

,

JUN

CTI

ON

CO

NN

ECTO

R

AB

( *3)

( *3)

( *3)

(*3)

Page 283: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

1 2 3 4

9 TOYOTA TUNDRA

1K2 1J8

1E2 1H3

1G4

15A TA

IL

IFLeft kick panel

2

2

1

2

1

2

1

2

1

2 BB1

EA Front left fender

4

1

7 A

1 B 8 B 7 B

II

1

2

1

2

2

1

5 ID2 6 ID2

4 ID2 3 ID2

5 A

10 B

6 8 4

16

A

1

3 3

2 3

14

E E EE E E E

2

14

A

AA

2 2

1

E E E

A

EE

E E

E

E E

G–YG

W–B

G

W–B W–B W–B

G G G

GGGGG

GG

R–B

W–B

W–G

B–L (*1 ) B (*2 )

G G

W–B

W–B

W–B

W–B

W–B

W–B

W–B

GG

G

G

G

G G

G G

G

W–G

W–G

W–G

W–G

W–B

W–G

W–B

BR

W–G

W–B

W–G

P ower S ource Ta illight Illum ina tion

TAIL

OFF

HEAD

J 3JUNCTIONCONNECTOR

BATTE

RY

C15LIGHTCONTROL SW[COMB. SW]

F 3P

ARK

ING

LIGH

T LH[FR

ON

T TUR

N SIG

NA

L LIGH

T LH]

F 4P

AR

KIN

G LIG

HT R

H[FR

ON

T TUR

N S

IGN

AL LIG

HT R

H]

R 4

TAILLIGH

T LH[R

EA

R C

OM

B. LIG

HT LH

]

R 5

TAILLIG

HT R

H[R

EAR

CO

MB. LIG

HT R

H]

L 1LIC

EN

SE

PLATE LIGH

T LH

L 2LIC

EN

SE P

LATE

LIGH

T RH

1 2

(2UZ–FE)To Engine ControlModule<5–9>

15

J10JUNCTIONCONNECTOR

J12JUNCTIONCONNECTOR

J13JUNCTIONCONNECTOR

J 5JUNCTION CONNECTOR

R 3

RH

EO

STA

T

C12

ME

TER

ILLUM

INA

TION

[CO

MB

. ME

TER

]

C16

STE

ER

ING

SW

[CO

MB. SW

]

G 3

GLO

VE BO

X LIGH

T

A18

AS

HTR

AY ILLU

MIN

ATIO

N

C 8

CIG

AR

ETTE LIG

HTER

ILLUM

INA

TION

EL T H

A

AW–B

W–B

W–B

W–B

T

E L

GND ILL– IL–1

ILL+

J 1JUNCTIONCONNECTOR

D10DIODE(Idle–Up)

I24 I25,

INTEGRATIONCONTROLAND PANEL

A B

RAD

IO A

ND

PLAY

ER

AB

R 1

R 2

,

BL

W–B

* 4 : w/o Daytime Running Light* 3 : w/ Daytime Running Light

3 BB2

W–B

W–B

AA

A

J18JU

NC

TION

CO

NN

EC

TOR

2

2

1

140A A

LT (*1 )100A

ALT (*2 )

50A J/B

C A C A

A B A B

R–B

R–B

R–B

R–B

JUN

CTIO

N C

ON

NE

CTO

R

BA

J21J22

,

From TO

W TAIL

Relay<

31–3>

To TVIP EC

U<

23–4>

E

G

G

M 4

MIR

RO

R H

EATER

SW

3

1

GW

–G

E

17 IE1

IE15

BR

(2UZ–FE)

(5VZ–FE)

E

Surrounding of thefront of the fuel tank

Right kickpanel

G–W

G–W

To Option Connector<31–3>

AA

AB

W–B

W–B

J23 J24,

JUNCTIONCONNECTOR

A B

G(2U

Z–FE)

W–B

W–G

* 2 : Except Towing Package

W–B

BR

W–B

INTEGRATION RELAY

IELeft kickpanel

EDIntakemanifoldleft

ECRear bank ofleft cylinderhead

(5VZ–FE )

BR

(2UZ–FE

)

(*1 )

* 1 : Towing Package

4 1N

13 1L

(*3)

(*4)

Page 284: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

12

34

10

TO

YO

TA

TU

ND

RA

Inte

rio

r L

igh

tP

ow

er

So

urc

e

22

2

B–L(*5) B (*6)

BA

TTE

RY

140A ALT(*5)100A ALT(*6)

10A

GAU

GE

2 1

40A AM1

2

AC

C

IG1

AM1

4

1I2

1F5

10A DOME

2 1

5B

G2

21

21

2

3

1

21

21

21

211

BK

Insi

de o

f rea

r doo

r R

HIF

Left

kick

pan

el

A

12

12

9A

9B

6B

5B

13B

7B

BJIn

side

of r

ear

door

LH

1J8

1A2

1B9

1H1

1B8

5BF

2

4B

H1

1F3

1E6

1F4

1A3

21

21

4IF

1

IF4

8

4IB

2

IB4

81IB

2

IB4

9

1IF

1

IF4

9

V 6VANITY LIGHT LH

V 7VANITY LIGHT RH

I26INTERIOR LIGHT

D19DOOR COURTESY SWREAR LH UPPER

D18DOOR COURTESY SWREAR LH LOWER

D16DOOR COURTESY SWFRONT LH

D21DOOR COURTESY SWREAR RH UPPER

D20DOOR COURTESY SWREAR RH LOWER

D17DOOR COURTESY SWFRONT RH

21

B–Y

L–Y

L–Y

L–Y

L

W–L

B

W

L–Y

L–B

R

B–W B–W

B–W

W–B

W–B

W–L

W–L

W–L

W–L

B

W–L

W–LL–Y

L–Y

L–Y

L–Y

L–Y

W–B

W–B

B–W

L

L

L

W–B W–B

B–W

W–L

B–W

B–W B–W B–W B–W

B–W

W–B

W–B

B–W B–W

L

B–W

L–Y

L–Y

L–Y

L–Y

L–Y

L–Y

B–W

( *2)

I22

IGN

ITIO

N K

EYC

YLI

ND

ER L

IGH

T

J 3

JUN

CTI

ON

CO

NN

EC

TOR

P 8

PER

SO

NA

LLI

GH

T

CC

CC

C

C

C

EE

EE

E

CC

D15DOOR COURTESYLIGHT RH

I23

IGN

ITIO

N S

W

J 9

JUN

CTI

ON

CO

NN

EC

TOR

J 5

JUN

CTI

ON

CO

NN

ECTO

RJ

4JU

NC

TIO

NC

ON

NE

CTO

R

COMBINATIONMETER

BAC11 C12,

B–Y L

From IntegrationRelay<20–2><21–2>

(*2) (*2) (*2)

(*2) (*2)

(*1)(*1)

( *3)

( *4)

( *3)

( *4)

B–W

(*1)

(*2) (*2) (*2) (*2) (*2)

(*2)(*2)

(*1)

B–L(*3)

(*3)

From IntegrationRelay<20–2><21–2>

* 6

: Exc

ept T

owin

g P

acka

ge*

5 : T

owin

g Pa

ckag

e*

4 : w

/o W

irele

ss D

oor L

ock

Con

trol

DOOR

2 1

W–L

1

2 DOOR

OFFON

W–B

W–B

1

DO

OR

12

2

12

2

SHORT PIN

CB

BA

BA

BA

L

B–W(*4)

D11DIODE(Power Window System)

4BE

2

C

B–W

5B

E2

4B

G2

E

L(*2)

L

J23

J24

,

JUN

CTI

ON

CO

NN

ECTO

R

AB

2IC

1

21

BA

BA

BB

From

TVI

PE

CU

<23

–3>

BB

B–W

BB

B

B–W

B–W

W–B

To T

VIP

ECU

<23

–4>

B–W

B ( *3)

( *3)

(*3)

21

D29

DIO

DE

( TVI

P)

L–Y

* 2

: Acc

ess

Cab

* 3

: w/ W

irele

ss D

oor L

ock

Con

trol

* 1

: Sta

ndar

d C

ab

From

TVIP

EC

U<

23–3

>

L

E

B–W

JUNCTION CONNECTOR

BAJ21 J22,

D14DOOR COURTESYLIGHT LH

(*3)B–W

S 3STEP LIGHT

L–Y

(*2)

D27DIODE(Step Light)

D 9DIODE(Door Courtesy)

(*4)

B–W

(*2)

( *2)

J 4

JUN

CTI

ON

CO

NN

ECTO

R

(*2) (*2)

( *3)

(*3)

(*3)

Page 285: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

1 2 3 4

11 TOYOTA TUNDRA

2

2

2

ACC

IG1AM1 4

1I2

1J5

2

2

1

1

2

3

3

1

3

1

2

3

C A

A B B B

LH

RH

2

31

I23IGNITION SW

1H12 1H131E11 1E7 1D5 1D11

1D7 1D10

1 B 12 C

EA Front leftfender

IF II Right kickpanel

A A

7 A

8 3 2 7

1

1 4 6 5

C15TURN SIGNAL SW[COMB. SW]

J13JUNCTIONCONNECTOR

J 3JUNCTIONCONNECTOR

W–B

W–B

B–Y

WL–W

G–Y

G–B

G–R

G–B

G–Y

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B W–B

BATTERY

2

140A ALT (*1 )100A ALT (*2 )

40A AM

1

R–B

L–W

2

20A H

AZ

From Integration C

ontroland P

anel<30–7>

TUR

N S

IGN

AL IN

DIC

ATO

RLIG

HT[C

OM

B. METER

]

BA

C11

C12

,

LH RH

T urn S ignal and H azard W arning L igh tP ow er S ource

B A

F 4FR

ON

T TUR

N S

IGN

AL

LIGH

T RH

R 5

REA

R TU

RN

SIGN

AL

LIGH

T RH

[REA

RC

OM

B. LIGH

T RH

]

R 4

REA

R TU

RN

SIGN

AL

LIGH

T LH[R

EAR

CO

MB. LIG

HT LH

]

F 3FR

ON

T TUR

N S

IGN

AL

LIGH

T LH

5ATURN

T 5TURN SIGNALFLASHER

G G–B

G–B

G

G–Y

G–B

G–B

G–Y

G–B

G–Y

L–W

W–B

W–B

TL TR TB

TURN

IG +B ER EL

EHW LL LR GND

B–L (*1 )

B (*2 )

BL Surrounding of thefront of the fuel tank

W–B

W–B

22 IA4

* 2 : Except Towing Package* 1 : Towing Package

A

AA

J18JU

NC

TION

CO

NN

ECTO

R

BB23

1D9 1D6

To Towing C

onverter<

31–4>

AA

AA

AB

Left kickpanel

IELeft kickpanel

W–B

W–B

W–B

G–Y

G–B

J23 J24,

JUNCTIONCONNECTOR

A B

J14 J15,

JUNCTIONCONNECTOR

A B

CC

13,

Page 286: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

12

34

12

TO

YO

TA

TU

ND

RA

2

AC

C

IG1

AM

1

3 4

22

12

53

22

2

40A AM1

20A FOG

140A ALT(*6)100A ALT(*7)

54

2

3

10A

HE

AD

LL

12

53

22

22

22

22

22

8IA

5

1011

EA

Fron

t lef

t fen

der

21

21

1I2

10A

GA

UG

E

1F7

1F8

1F9

1G11

15A

AC

C

1I1

21

35

IELe

ft ki

ckpa

nel

2A

1B

2B

3A

( A/T

)

( M/T

)

( A/T

)

( M/T

)

33

AD

1

1

11

A E

55

D A

3 12

A E

ADG

R–B

G–W

B–Y

L–R

( *5)

B–Y

GR

( *4)

B–Y

GR

( *4)

GR

( *3)

B–Y

R–B

R–B

W–B

W–B

W–B

R–B

( *2)

R–B

R–B(*2)

R–B(M/T)

R–B

R–B

W–B

W–B

W–B

W–B

B–Y

B–Y

B–Y

L–R

L–R

L–R

W

P

R–Y

P

P

W–B

W–B

W–B

G–B

R–B

R–B

( M/T

)

B–L(*6) B (*7)

B–Y

Po

we

r S

ou

rce

Fo

g L

igh

t ( w

/ D

ay

tim

e R

un

nin

g L

igh

t)B

ac

k–

Up

Lig

ht

3

22 2

H–LP RELAY

DIMMER RELAY

FOG RELAY

R–Y

See HeadlightSystem<7–3>

See Headlight System<7–1>

J 2JUNCTIONCONNECTOR

BAT

TER

Y

C15

FOG

LIG

HT

SW

[CO

MB

. S

W]

J18JUNCTIONCONNECTOR

F 1FRONT FOG LIGHT LH

F 2FRONT FOG LIGHT RH

(M/T)

(A/T)

(A/T)

( A/T

)(M/T)

( A/T

)

( A/T

)( A

/T)

( M/T

)

J 8

JUN

CTI

ON

CO

NN

EC

TOR

D 8

DIO

DE(

A/T)

B 3

BAC

K–U

PLI

GH

TR

ELA

Y

BACK–UP LIGHT SW[PARK/NEUTRAL POSITION SW]

AP 1

R 5BACK–UP LIGHT RH[REAR COMB. LIGHT RH]

R 4BACK–UP LIGHT LH[REAR COMB. LIGHT LH]

J12

JUN

CTI

ON

CO

NN

ECTO

RC

C

* 5

: 5V

Z–FE

* 6

: Tow

ing

Pack

age

I23

IGN

ITIO

N S

W

To IntegrationRelay<7–3>

(A/T)

BACK–UP LIGHT SW

BB 1

2IE

1

IE1

4

26IE

1

L–B(*2)

L–B(*1)

( *2)

( M/T

)

L–B(*1)

L–B

( *2)

B–Y

( M/T

)

12IE

1

IE2

152

IE1

R–B(*1)

R–B(*1)

( *2)

( M/T

)

GR

( *3)

J 9

JUN

CTI

ON

CO

NN

EC

TOR

BL

Sur

roun

ding

of t

hefro

nt o

f the

fuel

tank

(*5)*

7 : E

xcep

t Tow

ing

Pac

kage

1

2

5A ECU–B

2

2

R–B

17IA

5

F BD A

12

43

J21

J22

,

JUN

CTI

ON

CO

NN

EC

TOR

AB

(*5)

L–O

L–R

W–R(*3)

W–R(*4)

See

Eng

ine

Con

trol

Sys

tem

<5–

2>

A22

AC

C C

UT

RE

LAY

7B

B1

To T

raile

rSo

cket

<31

–3>

R–B

Y

IA49

L–R

( *1)

L–R

( *1)

W–RW–R(*3)

W–R(*4)

2 1

SHORT PIN

( *1)

( *1)

BB2

3

AB

AA

JUNCTIONCONNECTOR

BAJ23 J24,

W–B

W–B

* 1

: 2U

Z–FE

* 3

: w/ D

oor

Lock

Con

trol

* 2

: 5VZ

–FE

A/T

* 4

: w/o

Doo

r Loc

k C

ontro

l

22

B

W–R

( *3)

1

IA48

L–O

( *6)

( *1)

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2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

1 2 3 4

13 TOYOTA TUNDRA

2

2

B–L (*1 ) B

(*2 )

BATTERY

P ow er S ource M irro r H ea ter S top L igh t

50AJ/B

W–G

1

G–W

G–Y

BA

JUNCTIONCONNECTOR

, J15J14

W–B

W–B

W–B

G–W

G–W

G–W

G–W

G–Y

G–Y

W–B

To Engine Control

Module<

5–14><

6–9>

C

C

J 3JUNCTIONCONNECTOR

BC

AA

BC

4 1D

5 1H

1 1D

3 1D

2 1A

8 1J

IF

G–W

To ABS

Actuator with

EC

U<

16–4>

2 1K

2 1F

C J10JUNCTIONCONNECTOR

33

44

G–W

W–B

H10

HIG

H M

OU

NTE

DS

TOP

LIGH

TG–W R

4STO

P LIG

HT LH

[RE

AR

CO

MB

. LIGH

T LH]

R 5

STO

P LIG

HT R

H[R

EAR

CO

MB. LIG

HT R

H]

1

2

IC1

15ASTOP

2

3 1

S 4STOP LIGHTSW

BLSurroundingof the frontof the fuel tank

4

See Cruise ControlSystem<5–15><6–11>

See Cruise ControlSystem<5–15><6–11>

1

2

140A ALT(*1)100A ALT(*2)

G–W

Left kickpanel

A

To Option C

onnector<

31–3>

To Towing C

onverter<

31–4>

G–W

G–W

C

C

2

15AMIR HTR

40AAM1

2

2

11

2

2

ACC

IG1AM1 4

9 1F

2 1I

10AGAUGE

W

R–W

B–Y

I23IGNITION SW

E

EE

IE Left kickpanel

A B A B

A A

4

2

B–YB

–Y

J 8JUNCTIONCONNECTOR

IG

E D

6

M 4MIRROR HEATERSW

W–B

W–B

16 IA5

1

2

5

3

2 2

2 2

6 IF3

6

2

1 IF3

IIRight kickpanel

R 9

MIR

RO

R H

EATER

RH

[RE

MO

TE C

ON

TRO

L MIR

RO

R R

H]

6 IB3

2

6

IB31

R 8

MIR

RO

R H

EATE

R LH

[RE

MO

TE CO

NTR

OL M

IRR

OR

LH]

25 IA4

11 IA4

D

D D

MIR HTRRELAY

B–Y

R–W

R–W

R–W

R–W

W R–W

R–W

R–W

R–W

B–Y

B–Y

J11JUNCTIONCONNECTOR

J13JUNCTIONCONNECTOR

J23 J24,

JUNCTIONCONNECTOR

A B

W–B

W–B

W–B

W–B

P–G

W–B

A

* 1 : Towing Package* 2 : Except Towing Package

(*1 )

Page 288: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

12

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TO

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( Con

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page

)

2

AC

C

IG1

IG2

ST2

AM

1

3 4 67

AM

2

22

2 2

40A AM1140A ALT(*1)100A ALT(*2)

30A AM2

15A EFI NO. 1

1I4

1F11

2

12

53

2 EA

Fron

t lef

t fen

der

3A

32D

28E

8B

9B

10B

11B

17B

20A

22A

21E

19E

17E

16E

19B

12

6IA

4

2 2

1A

14IA

4

16A 13

7E

6E

7C

4C

EB

Rea

r ban

k of

rig

htcy

linde

r hea

d

26D

34D

15D

10D

11D

B C D E F G I J

B

11

1

1

21

B

22

2

2

48

7

L–O

W–BLGL

W–R

R–B

B–Y

L–R

B–R

B–YL–R

B–L(*1) B (*2)

W–R

W

B–R

B–Y W–B

W–L

W–L W–LW–L

B–R

B–R

B–R

R–L

B–W

R–B

W–R

L

LGR W–B

W–B

W–B

W–B

W–B

Y–R

W–R

W–R

W–L

P–L

G–R

Ele

ctr

on

ica

lly C

on

tro

lled

Tra

ns

mis

sio

n a

nd

A/T

In

dic

ato

r ( 2

UZ

–F

E)

Po

we

r S

ou

rce

I23

IGN

ITIO

N S

W

A 4A/T OIL TEMP. SENSOR

OD

MS

E01

E02

E03

ME

01S

P2+

SP2–

SL

S2

S1

+B

BA

TTTH

OC

E2

STP

NS

WS

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WVT

AV

PATC

SP

DR

D2

L

See

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ine

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trol S

yste

m<

5–7>

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10>

<5–

11>

<5–

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<5–

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<5–

14>

<5–

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TER

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W

B

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NO. 2

NO. 1

EFI

REL

AY

J 1

JUN

CTI

ON

CO

NN

EC

TOR

V 3VEHICLE SPEED SENSOR(ElectronicallyControlled Transmission)

O 4O/D MAIN SW

, E

5E

4B

C,

E 6

D,

E 7

EE

NG

INE

CO

NTR

OL

MO

DU

LE

8A

MR

EL

9A

IGSW

B–Y

B–R

SLT

13D

SLT

+S

LT–

D12

2

O

6

G2

A+B2 W–L

W–L

18E VC

B–R

G–W35

D27

D 21

V

NC

O–

NC

O+ P

O 1O/D DIRECT CLUTCHSPEED SENSOR

L–O

E 1ELECTRONICALLY CONTROLLEDTRANSMISSION SOLENOID

15IA

4

B–O B–O

B B

J 5JUNCTIONCONNECTOR

5A IGN

Y–R

H

B25

OIL

W

, E

3A

EC

Rea

r ban

k of

left

cylin

der h

ead

BR

C1

E1 BR

OD

LP

7B

1

2

5A ECU–B

2 2

W–R

1

SHORT PIN

AW

–R

22

B

AA

W–B

J18JUNCTIONCONNECTOR

* 1

: Tow

ing

Pack

age

* 2

: Exc

ept T

owin

g P

acka

ge

Page 289: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

5 6 7 8

14 TOYOTA TUNDRA (Cont’ d)

J

I

H

F

E

D

C

B

E lectron ically Con trolled Transmiss ion and A /T Ind icato r (2U Z–F E)

7 A10 D

9 A 9 D 8 D 7 D 6 D 5 D 4 D

8 4 7 5 2 1

3

LL 2L DL NL RL PL

11 IE1 20 IE1 6 IE1 10 IE1 2 IE1 19 IE1

1I2 1I1

10AGAUGE

15AACC

1G111F91F5

26 IE1

2

A B

B C

E A

AE

C CB

BABA

L–R

B–Y

R–B

L

Y–R

L–O

W–B

L–B

B–Y

B–Y

L–B

W–B

B–Y

LG L LG L

LG L

W–R

W–R

R–B

R–B

R–B

L–Y

B–Y

B–Y

GR

GR

GR

L–Y

R–B

LG–B

W–R

LLG

C11 C14,

COMBINATION METER

A D

J12JUNCTIONCONNECTOR

A/T O

IL TEM

P.

L 2 D N R P

J12JUNCTIONCONNECTOR

L–B

P 1A/T INDICATOR SW[PARK/NEUTRAL POSITION SW]

(*4 )

(*3 )(*3 )

1 3

J 8JUNCTIONCONNECTOR

J 8JU

NC

TION

CO

NN

EC

TOR

LG–B

LG–B

C

C

J11JU

NC

TION

CO

NN

EC

TOR

B

W–R

W–R

D3

O/D

OFF

GLG

RB

D 8DIODE(A/T)

J 9JUNCTIONCONNECTOR 1

2

4

3

W–R

See Engine C

ontrolSystem

<5–2>

A22ACC CUT RELAY

* 4 : w/o Door Lock Control* 3 : w/ Door Lock Control

AA

AB

IE Left kickpanel

W–B W–B

AW–R

8 IA4 9 IA4 17 IA5

D A

F B

W–R

W–R(*3)

(*3)

W–R

L–O

L–RL–R

L–O

L–O

(*4 )

JUN

CTIO

NC

ON

NE

CTO

R

BA

J21J22

,

J23 J24,

JUNCTIONCONNECTOR

A B

Page 290: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

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34

15

TO

YO

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( Con

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)

2

AC

C

IG1

IG2

ST2

AM

1

3 4 67

AM

2

22

2 2

40A AM1 100A ALT

30A AM2

15A EFI NO. 1

1I4

5A IGN

1F11

2

12

53

2 EAFr

ont l

eft f

ende

r

16A

19E

11E

21B

4B

5B

6B

6A

7D

25E

15E

18E

7A

3B

20A

21

6IA

4

2 2

1A

14IA

4

14B 13

8E

7E

5E

17D

EDIn

take

man

ifold

left

23D

22D

1E

2E

3E

A B D E F G H I

B

11

1

1

21

B

22

2

2

48

7

L–O

W–B

Y–RLGL

R–B

B–Y

L–R

B–R

B–YL–R

B

W–R

W

B–R

B–Y W–B

W–L

W–L W–LW–L

B–R

B–R

B–R

R–Y

B–WR–Y

R–B

L

LG

Y–R

R W–B

W–B

BR

W–B

W–B

Y–R

W–R

W–R

W–L

R

G–R

Ele

ctr

on

ica

lly C

on

tro

lled

Tra

ns

mis

sio

n a

nd

A/T

In

dic

ato

r ( 5

VZ

–F

E)

Po

we

r S

ou

rce

I23

IGN

ITIO

N S

W

A 4A/T OIL TEMP. SENSOR

OD

MS

E04

E03

E02

E1S

P2+

SP2–

SL

S2

S1+BBAT

TO

ILE

2S

TPN

SW

STA

THW

VTA

VC

TCS

P1R

2L

OIL

W

See

Eng

ine

Con

trol S

yste

m<

6–5>

<6–

7><

6–9>

<6–

10>

BAT

TER

Y

W

B

YSL

NO. 2

NO. 1EF

IR

ELA

Y

J 1

JUN

CTI

ON

CO

NN

ECTO

R

V 3VEHICLE SPEED SENSOR(Electronically Controlled Transmission)

O 4O/D MAIN SW

, E

5E

4B

C,

E 6

D,

E 7

EEN

GIN

E C

ON

TRO

L M

OD

ULE

E 1ELECTRONICALLY CONTROLLEDTRANSMISSION SOLENOID

4A

B–Y

MR

EL

IGSW

B–O

A15

L–O

W–B

4EE01

15IA

4

OD

LP

20B

AAJ1

8JU

NC

TIO

NC

ON

NE

CTO

R

W–B

G–W

62

11C

5C

B–R

SLT–

SLT+

BR

6D

ME0

1

W–R

25B

CW

–R

D

B B

J 5JUNCTIONCONNECTOR

B–OB–O(*1) (*1)

(*2)

* 1

: w/ C

ruis

e C

ontro

l*

2 : w

/o C

ruis

e C

ontro

l

, E

3A

OSLT

+S

LT–

G

Page 291: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

5 6 7 8

15 TOYOTA TUNDRA (Cont’ d)

I

H

G

F

E

D

B

A

E lectron ically Controlled Transmiss ion and A /T Indicato r (5V Z–F E )

7 A10 D

9 A 9 D 8 D 7 D 6 D 5 D 4 D

8 4 7 5 2 1

3

LL 2L DL NL RL PL

23 IE2 6 IE2 26 IE2 2 IE2 15 IE2 21 IE2

1I2 1I1

10AGAUGE

15AACC

1G111F91F5

4 IE1

2A B

B C

E A

AE

C CBBABA

L–R

B–Y

R–B

L

LG

Y–R

L–O

W–B

L–B

B–Y

L–R

B–Y

L–B

W–B

Y–R

B–Y

LG L LG L

LG L

W–R

W–R

LG–B

R–B

R–B

R–B

L–Y

B–Y

B–Y

GR

GR

GR

L–Y

R–B

LG–B

W–R

LLG

C11 C14,

COMBINATION METER

A D

J12JUNCTIONCONNECTOR

O/D

OFF

A/T OIL TEM

P.

L 2 D N R P

J12JUNCTIONCONNECTOR

L–B

P 1A/T INDICATOR SW[PARK/NEUTRAL POSITION SW]

(*4 )

(*3 )(*3 )

1 3

J 8JUNCTIONCONNECTOR

J 8JU

NC

TION

CO

NN

EC

TOR

D3

RB

D 8DIODE(A/T)

J 9JUNCTIONCONNECTOR

CW–R

B

W–R

IE Left kickpanel

A A

A B

W–B W–B

W–B

W–B

J23 J24,

JUNCTIONCONNECTOR

A B

* 4 : w/o Door Lock Control* 3 : w/ Door Lock Control

Page 292: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

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1E

A14

EA1

2E

A15

EA1

W

W

I23

IGN

ITIO

N S

W

6E

A13

EA

1

22

2

2

40A AM1140A ALT(*1)100A ALT(*2)

40A ABS2

30A ABS3

B–L(*1) B (*2)

11

1

1 22

2

2

BATTERY

117

P P

V V

LG

L

R

W

B

Y

B

Y

W

R

L

LG

98

2322

54

1920

A 6

AB

S S

PEE

D S

EN

SO

RFR

ON

T LH

A 7

AB

S S

PEE

D S

EN

SO

RFR

ON

T R

H

LHR

H

1F5

1K3 7

EA1

116

Data Link Connector 3<5–4><6–4>

153

YY

W–G

II

AA

From Stop Light SW<13–4>

A 5

AB

S A

CTU

ATO

R W

ITH

EC

U

W

W–B

W–BG–W

218

FL+

FL–

FR+

FR–

RL+

RL–

RR

+R

R–

GN

D1

GN

D2

D/G

TCIG

1W

A+B

M+B

S

B–R B–Y

B–Y B–L

B–Y

B–R

J13

JUN

CTI

ON

CO

NN

EC

TOR

Po

we

r S

ou

rce

AB

S

1I2

B–R

B–Y

* 1

: Tow

ing

Pack

age

* 2

: Exc

ept T

owin

g P

acka

ge

2

AC

C

IG1

AM1

4

B–Y

34

12

11B

B1

10B

B1

9BB

18

BB1

10A

GA

UG

E5A EC

U IG

To Detection SW(Transfer L4 Position)<18–4><19–3> 14

L–RE

XI A19

AB

S S

PEE

D S

EN

SO

R R

EAR

Rig

ht k

ick

pane

l

7

W–L

TS

24 STP

ABS WARNING LIGHT[COMB. METER]

CAC11 C13,

9A

7C

Page 293: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

1 2 3 4

17 TOYOTA TUNDRA

67

2

2

1M3

1I4

5AIGN

I23IGNITION SW

BATTER

Y

W–R

P ower S ource S RS

1E6

1F3

A

A

3 B23 B5 B13 B14 B

3 A2 A

4 A 1 A2 B1 B

10 B11 B

1 2 1 2

12 B 19 B

A11AIRBAG SENSORFRONT LH

A B

CONNECTIONDETECTION PIN

A12AIRBAG SENSORFRONT RH

A B

CONNECTIONDETECTION PIN

9 B 20 B15 B 26 B6 C5 C1 A2 A28 B

IH Right kick panelIELeft kick panel

27 B

ACC

IG1

IG2

ST2

AM1

AM2

2

B–L (*1 )

B (*2 )

1

1

2

2

L–Y

B–R

L–Y

B–O

R–B

B–YB

–Y

B–Y

Y–R

Y–G

W–B

R Y–G

Y–R

1 2

A16AIRBAG SQUIB(Front Passenger Airbag Assembly)

A17AIRBAG SQUIB(Steering Wheel Pad)

P 3 P 4,

PASSENGER AIRBAGMANUAL ON–OFF SW

A B

SQB+ SQB–

E IND ECU– ECU+

SPIRALCABLE

Y–B Y

C 4 C 5,

CENTER AIRBAG SENSOR ASSEMBLY

A B C 6, C

W–B

W–B

W–B

Y–B Y Y–B Y

P13PRETENSIONERLH

P14PRETENSIONERRH

1 IA1 2 IA1

W–R

W–R

BRBR

B–W

BR

–W

W

W–G

P– P+ D+ D–

E1 E2 PL+ PL– PR+ PR– SL+ SL– SR+ SR–

IG2 GSW2 LA

SIL TC

B–R

L–Y

J 5JUNCTIONCONNECTOR

A

1 2

2 1 2 1

10ADOME

30AAM2

From Integration C

ontroland P

anel<30–7>

To Integration Control

and Panel<

30–6>

A11

B

LBE+RBE+

8 C

To Buckle S

W LH

<26–4>

To Data Link C

onnector 3<

5–4><

6–4>

B–Y

B–L

From S

eat Belt Warning

Occupant D

etectionS

ensor and Buckle S

W R

H<

30–5>

1

2

SHORTPIN

2

2

B

To Engine C

ontrol Module

<5–14>

<6–9>

5 B

10 C

C12 C13,

SRS WARNING LIGHT[COMB. METER]

B C

W–R

* 2 : Except Towing Package* 1 : Towing Package

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2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

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ACC

IG1

AM

1

3 4

2

40A

AM1

140A

ALT

( *3)

100A

ALT

( *4)

2

1I1

1I2

15A

ACC

10A

GA

UG

E20

A4W

D

1G11

1F9

1F5 10

B11

B8

A1

D

9A

26IE

1

53

II

12

24IE

23

IE2

12

D 4DETECTION SW(Transfer L4 Position)

D 3DETECTION SW(Transfer 4WD Position)

IE22

DD

D

2AE

11

618

255

214

720

C

22

31E

A

123

D

CLG

–BLG

–B

W–B

W–B

W–B

W–B

W–B

W–B

G–RG–R

L–R

L–R

G–O

L–R

L–R L–R

W–B

LG–B

Y–B

P

G–Y

BR–YB–Y

B–Y

B–Y B–Y

GRGR

GR

L–B L–B

LG–B

Y–B

Y–B

BR–Y

B–L(*3) B (*4)W

B–Y

4W

D (

2U

Z–

FE

)P

ow

er

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urc

e

(*2)

(*1)(*1)

I23

IGN

ITIO

N S

W

J 8JUNCTIONCONNECTOR

D 8

DIO

DE

( A/T

)

P 1

NE

UTR

AL

PO

SIT

ION

SW

[PA

RK/

NE

UTR

AL

PO

SIT

ION

SW

]

BAT

TER

Y

C11

C12

,

CO

MB

INA

TIO

N M

ETE

R

AB

J12

JUN

CTI

ON

CO

NN

ECTO

R

J13

JUN

CTI

ON

CO

NN

EC

TOR

J11

JUN

CTI

ON

CO

NN

ECTO

R

From Engine ControlModule<5–10>

From ABS Actuatorwith ECU<16–3>

To Combination Meter<29–3>

* 1

: w/ D

oor

Lock

Con

trol

* 2

: w/o

Doo

r Loc

k C

ontro

l

From

Inte

grat

ion

Con

trol a

nd P

anel

<30

–6>

To IntegrationControl and Panel<30–6>

BR–Y

4HI

4LO

W–B

IGS

PD

IND

2IN

D1

NG

ND

H–L

2–4

L44W

D

W–B

W–B

J 9JUNCTIONCONNECTOR

12

SH

OR

TP

IN

2

B

2

5A EC

U–B

2 1

2

17IA

5 W–R

FB

DA

W–R

JUNCTIONCONNECTOR

BAJ21 J22,

(*1)

11J

IE1

10

12

43

IA49

L–R

B–Y

L–R

B–Y

W–R(*2)

W–R

(*1)

W–R(*2)

W–R(*1)

See

Eng

ine

Con

trol

Sys

tem

<5–

2>

A22

ACC

CU

TR

ELA

Y

Rig

ht k

ick

pane

l

D,

C14

A B

F 7

4WD

CO

NTR

OL

ECU

* 3

: Tow

ing

Pac

kage

* 4

: Exc

ept T

owin

g Pa

ckag

e( Con

t. n

ext

page

)

8IA

4L–O L–O

Page 295: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

5 6 7 8

18 TOYOTA TUNDRA (Cont’ d)

36 2 5 1

GR

GR

GR

GR

LGB–R

R–B

4

RR–B

10 1123 R–W

24

LG

19

8 IE216 IE29 IE217 IE2

14 IE1

5 EC13 EC14 EC12 EC1 1 EC1

5 ED13 ED1

IE226

ED12 1 ED1

EC16

RRR–B

B–RLG

LG

R–W

R–B

R

4W D (2U Z–F E)

G

IE212

G

YY

R–W

R–W

ED14

IE213

B–W

B–W

IE220

LW

IE221

13 26 8 9 22

M

6 ED1

W–B

W–B

4

1 2 3 5 6

A 9ADD ACTUATOR

T 3TRANSFER SHIFT ACTUATOR

TM1 TM2 TL1 TL3 TL2 ADD

DL1 DL2 DM1 DM2

F 74WD CONTROL ECU

W–B

M

H2

H4

L4

A

B

W–B

W–B

GR

GR

From E

ngine Control M

odule<

5–15>

Page 296: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

12

34

19

TO

YO

TA

TU

ND

RA

2

ACC

IG1

AM

1

3 4

2

40A

AM

1

100A

ALT

21

IE3

IE2

8

9IE

3

IE2

20

2IE

3

IE2

9

18IE

1

IE1

18

IIR

ight

kic

k pa

nel

5E

G1

4E

G1

3E

G1

2E

G1

M

5IE

3

IE2

1

12

6IE

1

( A/T

)

( M/T

)

( A/T

)

( M/T

) 1E

G1

21

21

13IE

2

24IE

2

IE17

2D

9A

4D

10B

1J1

1I1

1I2

20A 4WD

10A GAUGE

15A ACC

1G11

1F9

1F5

4IE

1

13

21IE

2

2EA

BB

D

D

CC

1 1

24

101

5

4

79

3

36

52

1

A

2 2

CC

D

DD

EA

B1

3

D

W–B

W–B

W–B

W–B

WB–Y

L–R

W

L–R

W–B

W–B

W B

R

R–W

R–B

LG LG

R–B

R–W

R R

R–W

R–B

LG

GR

W–B W–B

W–B

GR

GR

GR

GR

L–R

GR

L–R

L–R

R–Y R–Y R–Y W–B

L–YR–Y

B–Y GR

L–YL–BL–BB–YB–Y

GR GR

GR

B–Y

L–R

L–Y

L–R

L–R L–R L–R

W

W W

B–R B–R

W

W

4W

D (

5V

Z–

FE

)P

ow

er

So

urc

e

(M/T)

I23

IGN

ITIO

N S

W

D 3

DET

ECTI

ON

SW

( Tra

nsfe

r 4W

D P

ositi

on)

J11

JUN

CTI

ON

CO

NN

EC

TOR

T 4TRANSMISSION CONTROL RELAY

J13

JUN

CTI

ON

CO

NN

EC

TOR

BAT

TER

Y

A 9

ADD

AC

TUAT

OR

J10

JUN

CTI

ON

CO

NN

EC

TOR

(A/T)

(A/T)

(M/T)

(A/T)

( M/T

)

(M/T)

(A/T) (A/T)

(A/T)

(A/T) (A/T) (A/T)

( A/T

)

J12JUNCTIONCONNECTOR

D 4

DET

ECTI

ON

SW

( Tra

nsfe

r L4

Pos

ition

)

D 5

DE

TEC

TIO

N S

W( T

rans

fer N

eutra

l P

ositi

on)

From Engine ControlModule<6–10>

From ABS Actuatorwith ECU<16–3>

From Engine ControlModule<6–10>

From Engine ControlModule<6–10>

(*2)

(*1) (*1)

J 8JUNCTION CONNECTOR

D 8

DIO

DE

( A/T

)

P 1

NE

UTR

ALPO

SITI

ON

SW

[PAR

K/N

EU

TRAL

PO

SITI

ON

SW

]

A/T P

4WD

COMBINATION METER

BAC11 C12,

* 1

: w/ D

oor L

ock

Con

trol

* 2

: w/o

Doo

r Loc

k C

ontro

l

J 9

JUN

CTI

ON

CO

NN

ECTO

R

EG1

6

17IE

2

(A/T)

GR

(A/T)

GR

(M/T)

GR

J 9JUNCTION CONNECTOR

7IE

3

10IE

3

(M/T)

(A/T)GR

(A/T)

DC14,

Page 297: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

3 421

50A J/B

140A A

LT (*1 )100A

ALT (*2 )

40A A

M1

2

1I2

A

D26

DO

OR

LOC

K M

OTO

R A

ND

DO

OR

UN

LOC

K D

ETECTIO

NSW

RH

20 TOYOTA TUNDRA

2

G–B

2

5AECU IG

4

G–B

AM1

R–Y

IG1

ACC

2

B–Y* 1 : Towing Package

30APOWER

W–G

See Taillight

System

<9–1>

15ATAIL

W–G

W–B

D23

DO

OR

KEY

LOC

K A

ND

UN

LOC

K SW

RH

J 4JUNCTIONCONNECTOR

W–B

D24

DO

OR

LOC

K CO

NTR

OL

SW

RH

L–W

1K2

W–B

D

2

2

31

UN

LOC

K

1

7 IB4

9

9 IB3

6

1N

1

LOC

K

2

3

UN

LOC

K

LOC

K

L–W

A

8 IB3

See H

eadlightS

ystem<

7–3><

7–4>

From TV

IP E

CU

<23–3> J 8

JUN

CTIO

N C

ON

NEC

TOR

D

1

52

UN

LOC

K

LOC

K

3

56U

NLO

CK

LOC

K

2

6 IF4

4

7 IF4

24

II Right kick panel

J13JUNCTIONCONNECTOR

1 IF3

6 1H

1

1

7 1H

23

M

C

M

2

C2

2

3 IB3

C

5 IB3

DC

3 IF3

C

5 IF3

3

1

IHRight kickpanel

1H9 1J88 1H

1

IFLeft kick panel

R–L

A

3

4 IB3

1

A

W–G

J 3JUNCTIONCONNECTOR

WW–G

B–L (*1 )

B (*2 )

B–Y

IF34

R–L

A

L–RP

–B

D22

DO

OR

KEY

LOC

K A

ND

UN

LOC

K SW

LH

W–G

W–G

I23IGNITION SW

L–R

W–B

G–B

W–G

R–Y

BATTERY

R–Y P10D

OO

R LO

CK

CO

NTR

OL SW

LH[P

OW

ER

WIN

DO

W M

ASTER

SW

]

R–Y

D25

DO

OR

LOC

K M

OTO

R A

ND

DO

OR

UN

LOC

K D

ETECTIO

NSW

LH

G–B

R–L

W–B

L–W

W–G

L–Y

To Door

Courtesy

SW

Front LH<

10–1>

L–W

To Door

Courtesy S

WFront R

H,

Rear LH

, RH

<10–4>

L–Y

R–L

L–W

A

BR

W–B

B–Y

P ower S ource

R–Y

B–Y

D oor Lock C on trol (w / D aytime Runn ing L ight)

W–B

B–Y

L igh t A u to T urn O ff(w / D aytime R unning L ight)

W–B

W–B

W–B

W–B

W–B

W–B

W–B

BR

B–YL–Y

W–B

R–Y

G–B

L

B–W

14 15

13 12 8

3

A

1NFrom

TVIP E

CU

<23–3>

2420 1N19

* 2 : Except Towing Package

9 IF3 8 IF36 IB4

C

21

INTEGRATION RELAY

C

C

R–Y

From TV

IP E

CU

<23–4>

B

From TVIP E

CU

<23–4>

W–B

W–G

L–R

W–B

1N

R–W

(2UZ–FE

)R

–Y(5VZ–FE

)

J 7JUNCTIONCONNECTOR

J 7JUNCTIONCONNECTOR

W–G

BD

D

BB

L–R

L–R

L–R

L–R

IE Left kickpanel

AB

AA IB3

1

J23 J24,

JUNCTIONCONNECTOR

A BW–B

J 7JUNCTIONCONNECTOR

DB

FA

FA

To TVIP ECU<23–4>

B–Y

From TV

IP EC

U<

23–4>

J21 J22,

JUNCTIONCONNECTOR

A B

EB

EA

EA

J22J21 ,

JUNCTIONCONNECTOR

A B

D

DL–Y

D

J 7JU

NC

TION

CO

NN

EC

TOR

10

L–Y

L–W

6 1N

To U

nlockW

arningS

W<

26–4>

1N22 1N

1O4 1N3 1N4

1N91N

Page 298: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

12

34

21

TO

YO

TA

TU

ND

RA

2

AC

C

IG1

AM1

4

22

2

40A AM1 140A ALT(*1)100A ALT(*2)

1I2

5A ECU

IG

1K2

2

31

7IB

49

IB3

LOCK

UNLOCK

8IB

3

1

52

UNLOCK

LOCK

2

31

UNLOCK

LOCK

9IF

38

IF3

IIR

ight

kic

kpa

nel

1IF

3

MM

3IB

35

IB3

3IF

35

IF3

1H7

1H6

IHR

ight

kic

kpa

nel

1H9

1J8

1H8

IFLe

ft ki

ck p

anel

4IB

3

G–B

11

13

13

DC

DC

2 2

DC

42

42

D

A

69

1 2

D

A

B–Y

W–G

W–G

W–B

W–B

W–B

L–W

W

W–G

B–L(*1) B (*2)

L–R

W–G

L–R

G–B

R–Y

R–Y

R–Y

W–G

R–L

L–W

L–Y

L–W

L–Y

R–L

L–W

BR

W–B

B–Y

B–Y

W–B

B–Y

W–B

W–B

W–B

W–B

W–B

W–B

BR

B–Y

L–Y

W–B

R–W

W–G

L

B–W

Lig

ht

Au

to T

urn

Off

( w/o

Da

yti

me

Ru

nn

ing

Lig

ht)

Do

or

Lo

ck

Co

ntr

ol

( w/o

Da

yti

me

Ru

nn

ing

Lig

ht)

Po

we

r S

ou

rce

G–B

R–Y

G–B

R–Y

I23

IGN

ITIO

N S

W

BATT

ERY

D22DOOR KEY LOCK ANDUNLOCK SW LH

P10DOOR LOCKCONTROL SW LH[POWER WINDOW MASTER SW]

To DoorCourtesySW Front LH<10–1>

To DoorCourtesy SWFront RH, Rear LH, RH<10–4>

W–G

G–B

R–Y

W–B

J 4

JUN

CTI

ON

CO

NN

ECTO

R

D24DOOR LOCK CONTROLSW RH

D23DOOR KEY LOCK ANDUNLOCK SW RH

D25DOOR LOCK MOTOR ANDDOOR UNLOCK DETECTIONSW LH

D26DOOR LOCK MOTOR ANDDOOR UNLOCK DETECTIONSW RH

See TaillightSystem<9–1>

See HeadlightSystem<8–1>

J 8JUNCTION CONNECTOR

INTE

GR

ATIO

N R

ELAY

W–B

J 3

JUN

CTI

ON

CO

NN

ECTO

RJ1

3JU

NC

TIO

NC

ON

NE

CTO

R

W–B

4IF

3B–Y

3

56

UNLOCK

LOCK

L–W

30A

PO

WE

R15

ATA

IL

1415

1312

8

3

AA

61L

51L

131L 1L

161L

89

1L2

1L1

1L3

1L

6IF

47

IF4

6IB

4

50A J/B

2 1

CC C

BC

BB

L–R

1 B

2

D

W–G

L–R

L–R

L–R

L–R

W–G

D28

DIO

DE

( LO

CK

)G

–B

From TVIP ECU<23–4>

J 7JUNCTIONCONNECTOR

J 7JUNCTIONCONNECTOR

D30

DIO

DE

( UN

LOC

K)

12

R–Y

C

A A

AJ

4JU

NC

TIO

NC

ON

NEC

TOR

R–W

From TVIP ECU<23–4>R–W

F AF A

D B

E AE A

E B

W–G

41L

To UnlockWarning SW<26–4>

P–B

W–B

IER

ight

kic

kpa

nel

A AA B

W–B

J23

J24

,

JUN

CTI

ON

CO

NN

EC

TOR

AB

IB31

W–B

To T

VIP

EC

U<

23–4

>

B–YFrom TVIP ECU<23–4>

J21

J22

,

JUN

CTI

ON

CO

NN

EC

TOR

AB

J21

J22

,

JUN

CTI

ON

CO

NN

EC

TOR

AB

From TVIP ECU<23–3>

L–Y

R–L

R–L

L–Y

A A

AD D

DJ

7JU

NC

TIO

NC

ON

NE

CTO

R

J 7

JUN

CTI

ON

CO

NN

ECTO

RR

–L

L–W

* 1

: Tow

ing

Pack

age

* 2

: Exc

ept T

owin

g P

acka

ge

Page 299: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

1 2 3 4

22 TOYOTA TUNDRA

2

ACC

IG1AM1 4

22

40A AM

1140A

ALT (*3 )

100A A

LT (*4 )

50A J/B

2

1I2 1K2

5AECUIG

30APOWER

2

1

3

5

1H7 1H6 1J8

1C1 1C2

3 IB4

3 IF4

IE Left kickpanel

1 IB3

M2 1

2 IB4 1 IB4

2 IF4 1 IF4

M1 2

108431

3 1

14 15 8

2

11

1

2

2

2

9 3 2

1 9

5 2

4

L–R

L–R

B–L (*3 ) B (*4 )

W–G

W

B–Y

W–G

W–B

W–B

LG

L–Y

R–B

R–W

R–B

R–W

R–B

R–W

LG

L–Y

L–R

L–R

L–R

L–R

P ower W indowP ower S ource

INTEGRATION RELAY

I23IGNITION SW

PO

WE

RR

ELA

Y

BATTERY

See D

oor LockC

ontrol System

<20–2>

<21–2>

P10POWER WINDOW MASTER SW

WINDOWLOCK SW

FRONT RH

UP DOWN

P11POWER WINDOWMOTOR FRONT LH

P12POWER WINDOWMOTOR FRONT RH

P 9POWER WINDOWCONTROL SW RH U

P

DO

WN

W–B

FRONT LH

DOWNUP

BW

E DU DO PU PW

SU SD B

U D

A B

A A

W–B

J23 J24,

JUNCTIONCONNECTOR

A B

C B

A A A A

L–R

L–R

L–R

(*2)

(*2 )

(*2)

J21 J22,

JUNCTIONCONNECTOR

A B

IF

J 3JUNCTIONCONNECTOR

A

23 6

1 BF2 4 BF2

Left kickpanel

1

G–B

R–L

G–B

R–L

W–B

W–B

E1CLSOPN

P22POWER WINDOW MOTOR(Back Window)

L–R

P21POWER WINDOW SW(Back Window)

(*1 )

(*1)

* 4 : Except Towing Package* 3 : Towing Package* 2 : Except *1* 1 : 5VZ–FE w/o Daytime Running Light M/T

W–B

M1 2

A

Page 300: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

12

34

23

TO

YO

TA

TU

ND

RA

2

140A

ALT

( *1)

100A

ALT

( *2)

22 1

1

50A J/B

2

12

2

40A AM1

2

12

2

5A ECU–B

2 1

22

AC

C

IG1

AM

14

5A ECU

IG

1C

30A

PO

WE

R

1 21K

13B

2B

2A

7IA

4V V

1 2

3IA

4W–B W–B

AA

AA

AA

AA

LG–B

1 3

7A

AB

T10TVIP BUZZER

18B

17B

6A

34

2

1

IELe

ft ki

ckpa

nel

J23

J24

,

JUN

CTI

ON

CO

NN

EC

TOR

AB

CA

BB

1A

W–G W–G

B–R

(*3) (*3)

W–G(*4)

11B

17IA

5

DA

DA

W–R W–R(*3) (*3)

W–R

(*4)

B–Y

JUNCTIONCONNECTOR

BAJ23 J24,

JUNCTIONCONNECTOR

AJ21

1I2

1G13

IG+B

2+B

1

2 4

W–R

W–G

B

W–G

W

W–RSHORT PIN

I23

IGN

ITIO

N S

W

LUG

BZR

EM

I+M

I–IN

D

W–B

W–B

W–B

W–B

W–BL

(Shielded)

L–W

MIC

+M

IC–

LP

E

W–B

W–B

S10SECURITY INDICATORAND GLASS BREAKAGESENSOR MICROPHONE

S 9SHORT CONNECTOR(TVIP)

8C

SRLY P To Park/Neutral Start SW(A/T)<1–2>

To Clutch Start SW or Clutch StartCancel SW(M/T)<1–2>

5B

CTY

B To Diode(Power Window System), (Door Courtesy)<10–3>

6B

KSW

P–B To Unlock Warning SW<26–4>

4B

DS

WD L To Door Courtesy SW

Front LH<10–2>

14B

LSW

D R–L To Door Unlock Detection SWLH<20–3><21–3>

15B

LSW

P L–Y To Door Unlock Detection SWRH<20–3><21–3>

2C

ACT+ L–Y From Door Lock Motor LH

<20–3><21–3>

4C

AC

T– B–Y To Door Lock Motor RH<20–4><21–4>

4AUL3

L–R To Door Key Unlock SWLH<20–1><20–2>

8BL2

W–G To Door Key Lock SWLH, RH<20–1><20–2>

9BUL1

L–R To Door Key Lock SWLH<20–1><20–2>

10BUL2

R–W To Door Key Unlock SWRH<21–3>

R–Y To Door Lock Control SWLH, RH<20–3>(*5)

(*6)

12B

GR

A

C3

G–R

STFrom ST Relay

<1–2>

A10

G–Y

HEA

DFrom Integration Relay<7–4><8–1>

A11

R–B

TAILFrom Integration Relay

<9–1>

A12

G–R

HO

RNFrom Integration Relay

<27–3>

C6

B–W

DM

LPFrom Interior Light, Personal Light<10–3>

T11

T12

,

TVIP

EC

U

AB

T13

, C

Po

we

r S

ou

rce

TV

IP a

nd

Wir

ele

ss

Do

or

Lo

ck

Co

ntr

ol

Cut Off

* 4

: 5V

Z–FE

* 5

: w/ D

aytim

e R

unni

ng L

ight

* 6

: w/o

Day

time

Run

ning

Lig

ht

BATT

ERY

B–L(*1) B (*2)

(*4)

P From Park/NeutralPosition SW<2–3>(*3)

G–RTo ST Relay<2–2>

(*4)

(*3)

* 1

: Tow

ing

Pac

kage

* 2

: Exc

ept T

owin

g P

acka

ge*

3 : 2

UZ–

FE

(*7) (*7)

* 7

: w/o

TV

IP

Page 301: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

1 2 3 4

24 TOYOTA TUNDRA

C igarette L igh terPow er Source

2

2

2

B–L (*3 ) B (*4 )

BATTERY

140A A

LT (*3 )100A

ALT (*4 )

1

2

1

40A A

M1

2

ACC

IG1AM1

1I1

1G6

II Right kickpanel

A

EA

B

J13JUNCTIONCONNECTOR

I23IGNITION SW

P ow er O utle t C lock

2

1F4

1E6

1

2

5

3

16 IA4

22 1

2

215APW

R O

UTLET1

15APW

R O

UTLET2

2

1

2

2 IA4 10 IA5

2 2

1

2

1 ID1

ID21

2 ID1

ID22

IF Left kick panel

AJ 3JUNCTIONCONNECTOR

1G10 1G12

C 7CIGARETTELIGHTER

P 6

PO

WE

R O

UTLET

P 7

PO

WE

R O

UTLET

GR

GR

W–B

W–B

W–B

W–B

W–B

W–B

GR

W–B

B

B

GR

L–Y

GR

GR

W

GR

GG

G–B

G–B

3

1 1

2 2

(*1)

(*2)

(*1)

(*2)

L–Y

L–Y

15AACC

POWEROUTLETRELAY

ACC B

GND

1

2

SH

OR

T PIN

W–B

AA W–B

B A

C B

J23 J24,

JUNCTIONCONNECTOR

A B

2

2

1

5A EC

U–B

10A DO

ME

1

2

2

2

L–Y

17 IA5

W–R

(*5 )

1

2

4

3 A22

AC

C C

UT R

ELA

Y

D A

F B

JUN

CTIO

NC

ON

NE

CTO

R

BA

J21J22

,

See Engine C

ontrol System<

5–2>

9 IA4

(*5 )

L–R

W–R

(*8 )

(*5 )

L–O

(*7 )

W–R

L–Y

(*7 )W

–R

(*7 )W

–R

(*5)

L–R

(*5 )L–O

(*5 )

L–R

(*8)

W–R W(*6)L–R

* 1 : w/ Cigarette Lighter Illumination* 2 : w/o Cigarette Lighter Illumination* 3 : Towing Package* 4 : Except Towing Package* 5 : 2UZ–FE* 6 : 5VZ–FE* 7 : w/ Door Lock Control* 8 : w/o Door Lock Control

Front left fender

A

AJ18JUNCTIONCONNECTOR

W–B

8 IA4

(*5 )L–O

13 5

1

I25C

LOC

K[IN

TEGR

ATION

CO

NTR

OL

AN

D P

ANE

L]

Page 302: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

12

34

25

TO

YO

TA

TU

ND

RA

W–G

Po

we

r S

ea

t

41C

P16

PO

WE

R S

EA

T C

ON

TRO

L S

W( D

river

’s

Seat

)

FRONT

UP

REAR

96

105

UP

DOWN

DOWN

FRONT

78

32

1B

I1

A

M2

1M

21

M1

2M

12

P19

PO

WE

R S

EA

T M

OTO

R( D

river

’s

Sea

t S

lide

Con

trol)

P15

POW

ER

SE

AT

MO

TOR

( Driv

er’

s Se

at F

ront

Ver

tical

Con

trol)

P17

POW

ER S

EAT

MO

TOR

( Driv

er’

s S

eat

Rea

r Ve

rtica

l C

ontro

l)

P18

POW

ER S

EAT

MO

TOR

( Driv

er’

s Se

at R

eclin

ing

Con

trol)

W–G

L–W

W–B

L–R

Y–R

Y–G

W–G

W–R

B–R

B

REAR

4

1 B

SLD

FS

LDR

FUP

FDW

NLU

PLD

WN

RC

LFR

CLR

E

SLI

DE

FRO

NT

VER

TIC

AL

REA

RV

ER

TIC

AL

RE

CLI

NIN

G

W–B

30A

POW

ER

W–G

L–W

2W

–B

31

S 8

SHO

RT

PIN

AA

L–W

A

J16

JUN

CTI

ON

CO

NN

EC

TOR

AA

J17

JUN

CTI

ON

CO

NN

EC

TOR

3

R

12

4

W–B

L

BJ1

12

BJ1

R

L

21 M

P20POWER SEAT MOTOR(Driver’ s Seat Lumbar Support Control)

L 3

LUM

BAR

SU

PPO

RT

CO

NTR

OL

SW

( Driv

er’

s S

eat)

W–B

BA

TTE

RY

B–L(*1) B (*2)

2

140A

ALT

( *1)

100A

ALT

( *2)

2 1

50A

J/B

2 1

2

W–G

Po

we

r S

ou

rce

1K2

12

C

J23

JUN

CTI

ON

CO

NN

EC

TOR

2B

I1

CW

–G

IELe

ft ki

ckpa

nel

A BA A

J23

J24

,

JUN

CTI

ON

CO

NN

EC

TOR

AB

W–B

W–B

W–B

W–B

* 1

: Tow

ing

Pack

age

* 2

: Exc

ept T

owin

g P

acka

ge

L

Page 303: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

1 2 3 4

26 TOYOTA TUNDRA

2

ACC

IG1AM1 4 1I2

20AWIP

1G3 1E3 1G2

2 2

2

40A AM

1140A

ALT (*1 )100A

ALT (*2 )

M

23 IA4

IF

M

10AGAUGE

1F5 1F3

1E6

5 B9 A

8 B 13 B12 B1 C1 A 7 A 2 B

2

1

EA

3 BI1

2 A

1 B

2 B

1 A (*9)

(*10)

(*9)

(*10)

IH

4 BI1

IE

17 8 7 16 2 111

1

2

2

3 5 2 1 4

C

L

L–R(*3)

B–Y

L–Y

B–Y

L–YL–Y

W

BB

–L (*1 ) B

(*2 )

L (*3 )

L

L

L–R

LG–R

LG–R

W–B

W–B

W–B

Y–B

P–B

BB

W–B

I23IGNITION SW

OFF

INT

LOW

HIGH

WASHER

WIPER RELAY

C17WIPER AND WASHER SW[COMB. SW](*3)

ESB+1+2

BATTERY

C11 C12,

COMBINATION METER

A B C13, C

WA

SHE

R

2

1

W 2

WA

SHE

R LEV

EL S

EN

SO

R[W

AS

HE

R M

OTO

R]

U 1

UN

LOC

K WA

RN

ING

SW

P ower S ource W iper and W asher K ey Reminder and S eat B e lt W arning

* 1 : Towing Package* 2 : Except Towing Package* 3 : w/ INT Time SW Mechanism* 4 : w/o INT Time SW Mechanism

* 6 : INT2* 7 : w/ Door Lock Control

+B +2 +1 +S *5 *6 B1 EW WF

AJ 3JUNCTIONCONNECTOR

SE

AT BELT

C

P–B E

E

BR

BR

J 8JU

NC

TION

CO

NN

ECTO

R

See Interior Light

System

<10–1>

B 7

A,

B

BU

CK

LE SW

LH

From Integration

Relay<

20–2><

21–2>

EJ 7JUNCTIONCONNECTOR

P–B

Right kickpanel

W 4WIPER MOTOR

C17WIPER AND WASHER SW[COMB. SW](*4)

MIST

OFF

LOW

HIGH

WASHER

+B +2 +1 +S EW WF

17 8 7 16 2 11

Y–L (*3 )

L–W(*3 )

W–B (*3 )

L–B(*3 )

W–B(*4)

L–W(*4)

L–B(*4)

Y–L(*4)

L–R(*4) L–R(*4)

W–B

L(*4 )

* 9 : w/ Power Seat

* 8 : w/o Door Lock Control

* 5 : INT1*10 : Bench Seat

Left kickpanel

B

B

J10JU

NC

TION

CO

NN

EC

TOR

B

B B

From C

enter Airbag

Sensor Assem

bly<17–4>

*11 : Separate Seat, Captain Seat(w/o Power Seat)

W–B

(*9, *10 )(*9, *10 )

W–B

(*11 )B

(*11 )

W–B

4 C

3 C

B 7

BU

CK

LE SW

LH

C

(*9, *10)

1

2

SHO

RT P

IN

2

10A D

OM

E

2

2

1

L–Y

4

3

W 2

WA

SHE

R M

OTO

R

Front leftfender

Left kickpanel

II

A

W–B

J13JU

NC

TION

CO

NN

ECTO

R

10 IA4

A B

A A

Right kickpanel

JUN

CTIO

NC

ON

NEC

TOR

BA

J23J24

, (*7 )

(*7 )P

–B(*8 )

From TV

IPEC

U<

23–3>P–B

E

(*7 )

(*7 )

Page 304: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

12

34

27

TO

YO

TA

TU

ND

RA

Re

mo

te C

on

tro

l M

irro

rP

ow

er

So

urc

e

22 2

B–L(*8) B (*9)

BAT

TER

Y

140A ALT(*8)100A ALT(*9)

2 1

40A AM12

ACC

IG1

AM

1

31I

1

50A J/B

2 1

L–R

W

I23

IGN

ITIO

N S

W

A

A

7IB

3

MM

MM

11IB

310

IB3

12IB

31

IB3

11IF

310

IF3

12IF

3

IELe

ft ki

ckpa

nel

52

43

67

8

J 9

JUN

CTI

ON

CO

NN

EC

TOR

GR

W–B

Y–B

LG–R

P–B

L–B

R

Y–B

L–B

LG–R

W–B

Y–B

L–B

LG–R

Y–B

L–B

LG–R

Y–B

R

P–B

R10

RE

MO

TE C

ON

TRO

LM

IRR

OR

SW

Ho

rn

1G11

GR

GR

GR

LEFT

UP

LEFT

/U

PR

IGH

TD

OW

NR

IGH

T/D

OW

N

LHR

H

OPERATIONSW

SELECT SW

15A

AC

C

( A/T

)

( A/T

)

(M/T)

HL

VL

M+

E

B

HR

VR

10A HORN

B

W–G B

7 11K2

61

1

H 8

HO

RN

RH

1E8

H 7

HO

RN

LH

C16

HO

RN

SW

[CO

MB

. S

W]

W–G

2 1

12

SHORT PIN

2

12

43

IA49

2

5A ECU–B

2

B

FB

DA

JUNCTIONCONNECTOR

BAJ21 J22,

A22ACC CUT RELAY

See

Eng

ine

Con

trol

<5–

2>

W–R

IA5

17

L–R

W–R

( *12

)

W–R

( *13

)

W–R

L–R

L–O

( *11

)

( *10

)( *

10)

(*10)

( *12

) 2B

3A

3B

1A

1B

( *7)

5A

( *6)

AB

AA

W–B

J23

J24

,

JUN

CTI

ON

CO

NN

EC

TOR

AB

2B

3A

3B

1A

1B

( *7)

5A

( *6)

R 9 A , B

REMOTE CONTROLMIRROR RH

R 8 A , B

REMOTE CONTROLMIRROR LH

J10JUNCTIONCONNECTOR

AA

A

To TVIP ECU<23–4>

INTE

GR

ATI

ON

REL

AY

G–R(*1)

G–R

* 1

: 5V

Z–FE

w/ D

oor

Lock

Con

trol,

2UZ–

FE*

2 : 5

VZ–

FE w

/o D

oor L

ock

Con

trol w

/ Day

time

Run

ning

Lig

ht*

3 : 5

VZ–

FE w

/o D

oor L

ock

Con

trol w

/o D

aytim

e R

unni

ng L

ight

* 4

: 5V

Z–FE

w/ D

oor

Lock

Con

trol w

/ Day

time

Run

ning

Lig

ht, 2

UZ–

FE w

/ Day

time

Run

ning

Lig

ht*

5 : 5

VZ–

FE w

/ Doo

r Lo

ck C

ontro

l w/o

Day

time

Run

ning

Lig

ht, 2

UZ–

FE w

/o D

aytim

e R

unni

ng L

ight

* 6

: w/ M

irror

Hea

ter

* 7

: w/o

Mirr

or H

eate

r*

8 : T

owin

g Pa

ckag

e*

9 : E

xcep

t Tow

ing

Pac

kage

*10

: 2U

Z–FE

*11

: 5VZ

–FE

*12

: w/ D

oor

Lock

Con

trol

*13

: w/o

Doo

r Loc

k C

ontro

l

8IA

4

L–O

( *10

)

(*10)

121N

121L

( *2,

*4)

( *3,

*5)

G–R(*2, *4, *5)

G–R(*3)

*14

: w/ W

irele

ss D

oor

Lock

Con

trol

( *14

)

Page 305: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

1 2 3 4

28 TOYOTA TUNDRA

2

22

1G10

1I1

2

ACC

IG1AM1

3

P ow er S ource R ad io and P layer

L–R

WB

–L (*4 ) B

(*5 )

I23IGNITION SW

BATTERY

40A AM

1140A ALT (*4 )100A ALT (*5 )

2

22

1

11

1 21 21 21 2

IGInstrument panelbrace RH

2 1 2 1

2 IF1

IF410

3 IF1

IF45

2 IB2

IB410

3 IB2

IB45 3 BF22 BF23 BE22 BE2

1 BC1 2 BC1 1 BA1 2 BA1 2 BG2 1 BG2 2 BH1 1 BH1

1 B 5 B7 B 2 B 6 B 2 A 6 A 1 A

7 C

R 1 R 2,

RADIO AND PLAYER

A B

E FR+ FR– FL+ FL+ RL+ RR+ RR–

B

L

GR

WRYBVPLLG

BR LG L

P (*1 )LG

(*2 )

V (*1 )L (*2 )

B Y R WWRYB

LLGLLG

LLGLLG

RL+

LG L LG L

ACC AU1

(*1)

(*2)

15AACC

SW1

T 8TWEETER RH

T 7TWEETER LH

F 9FRONT DOOR SPEAKERRH

F 8FRONT DOOR SPEAKERLH

R 6REAR DOOR SPEAKERLH

R 7REAR DOOR SPEAKERRH

13 12

I25INTEGRATION CONTROLAND PANEL

(*3 )(*3 )

(*3 )(*3 )

(*3 )(*3 )

(*3 )(*3 )

(*3 )

(*3 )

(*3 )

(*3 )

SH

OR

T PIN

3 A

1

2

4

3

IA49

See Engine ControlSystem<5–2>

2

2

5AECU–B

2

1

2

2

1

20ARADIO

(*7)L–R(*6)

D A

F B

IA517

A22AC

C C

UT R

ELAY

JUN

CTIO

NC

ON

NE

CTO

R

BA

J21J22

,

11 IA5

B4

B

W

W–R(*1)

W–R

(* 2)

W–R(*1)

R

W–R

L–R(* 6)

W–R

(*2 )

L–R(*6 )

L–O(*6 )

L–R(*7 )

L–O(*6)

R

W–R

W–R

(*1)

* 1 : w/ Door Lock Control* 2 : w/o Door Lock Control* 3 : Access Cab* 4 : Towing Package

8 IA4

W–R

(*6)

(*6 )

R11, C

* 5 : Except Towing Package* 6 : 2UZ–FE* 7 : 5VZ–FE

B3

GR

ACC1

ACC

14

C6

R

EAU

SWG

10

C8

G–B

AU2

SW2

11

5 II1 3 II1 4 II1

G–BLR

C16STEERING PAD SW[COMB. SW]

Page 306: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

12

34

29

TO

YO

TA

TU

ND

RA

2

ACC

IG1

AM

14

22 2

40A AM1140A ALT(*5)100A ALT(*6)

1I2

10A

GA

UG

E

1F8

1F5 9

A

TAC

HO

MET

ER

3C

1E6

1F3 5

B

2IE

1

IE1

7

4IE

36

IE3

25IE

2IE

23

2C

13C

12B

1C

13B

9B

4C

( *1)

( *2)

( *3)

( *4)

5IE

1

6B

7B

6A

8B

6C

5C

12A

3D

10D

8C

1A

10IE

1

IE1

138

IE1

IE1

24

IHR

ight

kic

k pa

nel

1

( *1)

( *2)

( *1)

( *2)

1B

1A

( *1)

( *2)

4B

B15

BB

1

6B

B1

C3

1

D

1112 2

2

DD

D

23

CC

21

L–YL–Y

W

L–YB–L(*5) B (*6)

B–Y

B–Y

G–O

G–O

G–O

G–O

BB

L–W

Y–R Y–R

BR

BR BR BR

Y–R

B–R

Y–R

B–R

Y–BY–B

B–Y

BR

Co

mb

ina

tio

n M

ete

rP

ow

er

So

urc

e

P–L

G–B

P–L

G–B

B–Y

B–Y

(*2)

I23

IGN

ITIO

N S

W

J 9

JUN

CTI

ON

CO

NN

EC

TOR

(*1)

From IntegrationRelay<30–7>

From 4WD ControlECU<18–4>

From Engine ControlModule<5–15><6–10> (*1)

(*2)

V 2

VE

HIC

LE S

PEE

DS

EN

SO

R( C

ombi

natio

n M

eter

)BA

TTER

Y

From Igniter<4–3>

From Engine ControlModule<5–15>

See Key Reminder andSeat Belt WarningSystem<26–3><26–4>

WASHER

MALFUNCTIONINDICATOR LAMP

A/T OIL TEMP.

O/D OFF

OIL

FUEL

SEAT BELT

DOOR

WATER TEMP.

FUEL

C11

C12

,

CO

MB

INAT

ION

MET

ER

AB

C13

, C

C14

, D

See Electronically ControlledTransmission andA/T Indicator System<14–5><15–5>

See Interior Light System<10–2>

F10

FUEL

SEN

DE

R

J 8

JUN

CTI

ON

CO

NN

ECTO

R

O 2OIL PRESSURE SW

See Engine ControlSystem<5–6><6–3>

See Wiper andWasher System<26–3>

( Con

t. n

ext

page

)

* 1

: 2U

Z–FE

* 2

: 5V

Z–FE

* 3

: 5V

Z–FE

A/T

* 4

: 5V

Z–FE

M/T

* 5

: Tow

ing

Pac

kage

* 6

: Exc

ept T

owin

g Pa

ckag

e

W 3 A , B

WATER TEMP. SENDER

See Interior LightSystem<10–1><10–2>

9IE

117

IE1

(*2) (*2)

(*2)(*2)

P–L(*1)

P–L(*1)

R–L(*1)

R–L(*1)

(*1)L–W

* 7

: w/ T

acho

met

er*

8 : w

/o T

acho

met

er

OIL

(*8) (*8)

(*7) (*7)

SHORT PIN

2

10A DOME

2

12

B

W

SP

EED

OM

ETE

RLC

D

1

O 6OIL PRESSURE SENDER

HEAT WIREY–B

(*8)

(*7)

Page 307: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

5 6 7 8

29 TOYOTA TUNDRA (Cont’ d)

3 B

4 B9 C11 B10 B1 D8 A 11 A 7 C 13 A

1B5

1E4

2

1

EAFront left fender

1

2

1

IF Left kickpanel

IA518

7 A 2 D 10 C14 B

12 C 1 B 16 B 9 D 8 D 7 D 6 D 5 D 4 D 15 B

W–B

W–B

W–B

G–W

G–W

W–B

W–B

Combina tion M ete r

A

4LO

4HI (*1 )

4WD

(*2 )

CR

UIS

E

CH

AR

GE

BR

AK

E

(*1 )

(*1 )

See 4WD

System

<18–2>

<19–4>

See C

ruise Control

System

<5–6>

<6–3>

See C

harging System

<1–4>

AB

S

VO

LT

TUR

N R

H

TUR

N LH

HIG

H B

EAM

L 2

See A

BS S

ystem<

16–2>

C11 C12,

COMBINATION METER

A B C13, C D, C14D N R P

A/T P

ILLUM

INATIO

N

SR

S

See Turn S

ignal andH

azard Warning

Light System<

11–3>

See Electronically Controlled Transmissionand A/T indicator System<14–6><15–6>

See H

eadlightS

ystem<

7–3><

8–3>

See Illumination

System<

9–3>

See S

RS S

ystem<

17–4>

See Illum

inationS

ystem<

9–3>

See 4W

D System

<19–4>

* 9 : w/ Daytime Running Light*10 : w/o Daytime Running Light

See Charging S

ystem<

1–4>

R–W

(*10 M/T )

(*9)G–W

R–W(*9 M/T)

W–B

II

J13JUNCTIONCONNECTOR

* 2 : 5VZ–FE

(*1 )

(*1 )

(*2)

(*2 )

* 1 : 2UZ–FE

1B6

A

A

AJ18JUNCTIONCONNECTOR

IE Left kick panel

A B

A A(M/T )

Right kick panel

W–B

W–B

J23 J24,

JUNCTIONCONNECTOR

A B

INTEGRATIONRELAY

B2

See K

ey Rem

inderand S

eat Belt

Warning S

ystem<

26–3>

J 3JUNCTIONCONNECTOR

R–W

(*9 A/T )

P 5PARKINGBRAKESW(A/T)

W–B

P 5PA

RK

ING

BRA

KESW

(M/T )

W–B

W–B

AA

1N13

1N1

B 2

BR

AK

E FLUID

LEVE

L WA

RN

ING

SW

(*10 M/T )

R–W

Page 308: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

12

34

30

TO

YO

TA

TU

ND

RA

2

35

12

4

22

2

22

22

CC1E5

1I2

2

AC

C

IG1

AM1

4

EAIFA

1F9

32

14

Po

we

r S

ou

rce

Air

Co

nd

itio

nin

g

21 M

76

12B

9B

20A

10A

4B

13A

15A

+

RE

CFR

S

Rig

ht k

ick

pane

l

12

8IE

3

IE2

16

E

E

18A

19A

8A

4IE

1

B–Y

B–Y

L–R

Y–R

L–B

R

WB–L(*5) B (*6)

W–B

W–B

L–R

B–Y B–Y

L–R

B–L

B–Y

B

B–W

B–Y

B–Y

W–L

L–R

L–Y

L–B

W–L

L–R

L–Y

L–R

13IA

4

2IA

5 W–L

L–RB

5BL

OW

ER

RE

SIST

OR

HTR

REL

AY

B 6

BLO

WE

R S

W

I23

IGN

ITIO

N S

W

A13A/C THERMISTOR

A15AIR INLETCONTROLSERVO MOTOR

B 6DEFROSTER SW[BLOWER SW]

BA

TTE

RY

40A AM1

50A HTR

140A ALT(*5)100A ALT(*6)

10A GAUGE

22

2

5

3

11

1

B 4

BLO

WE

RM

OTO

R

48

M1

M2

LOH

15

1

(*2) (*2)

(*1) (*1)

( *3)

( *4)

* 1

: 2U

Z–FE

* 2

: 5VZ

–FE

* 3

: 5VZ

–FE

A/T

* 4

: 5VZ

–FE

M/T

J 1

JUN

CTI

ON

CO

NN

EC

TOR

19IA

4

I24

I25

,

INTE

GR

ATI

ON

CO

NTR

OL

AN

D P

ANE

L

AB

2 1

2

22

W–L

10A

A/C

1 2

12

E

J 8

JUN

CTI

ON

CO

NN

EC

TOR

A/C MAGNETICCLUTCH

L–R

L–R

L–R

L–R

B–Y

W–G

W–G

L–B L–B

Y–RII

A

W–B

1B

J13

JUN

CTI

ON

CO

NN

ECTO

R

AW

–B

From Engine ControlModule<5–9><6–10>

B–L

MG

CA

IND

( *1)

AC

T(*2

)A/

CM

( *1)

AC1(

*2)

GN

D

BL

INE

IGR

EC

FRS

1

50A J/B

2

2

L–Y

B EC

W–G

L–Y

L–R

( *2)

3

W–B

W–B

W–B

W–B

J 3

JUN

CTI

ON

CO

NN

EC

TOR

A

1B

( *2)

3A

( *1)

( Con

t. n

ext

page

)

EB–

Y

A A

J18

JUN

CTI

ON

CO

NN

ECTO

R

(*2)*

5 : T

owin

g P

acka

ge*

6 : E

xcep

t Tow

ing

Pack

age

A 2

A 3

,

A/C

MA

GN

ETI

C C

LUTC

H

BA

DL–

R( *

1)

( *2)

L–R

( *1)

SHORT PIN

22

10A DOME

B

12

1

2

5A ECU–B

2

W–R(*1)

Fron

t lef

t fen

der

Left

kick

pan

el

AW

–R( *

1)

W–B

(*2)(*2)

Page 309: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

M

7 865

B13

7 BB8

To Passenger A

irbagM

anual On–O

ff SW

<17–2>

30 TOYOTA TUNDRA (Cont’ d)

3 A

14 B

A4 5 A B A7

From 4W

D C

ontrol EC

U<

18–3><

18–4>

From P

assenger Airbag

Manual O

n–Off S

W<

17–1>

To Com

bination Meter

<18–2>

3B2 1 A

8 IA4 17 IA4

1

2

15AACC

B

1I1

1G10

5ACARGOLP

1K2

9 A

12 A

1H10

1A71H2

1D2

To Turn Signal

Flasher<11–2>

2

3

1A2

1J8

IFLeft kick panel

A6 A16

In teg ration C on tro l and P ane lA ir Conditioning C argo L ight

B

C

E

1E6

4 1F

I24 I25,

INTEGRATION CONTROL AND PANEL

A B

5

GR

L–YL–Y

G–O

R–B

W–B

W–B

R–B

W–B

R

W–L

OO B–R G

–Y

P Y–B

BR–Y

R–B

R–B

L–R(*2)

L–Y

W–G

A 1

A/C

DU

AL PR

ESS

UR

E SW

J 3JUNCTIONCONNECTOR

5

A

11

* 1 : 2UZ–FE

(*1 )

(*1 )

(*1 )

(*1 ) H10CARGO LIGHT[HIGH MOUNTED STOP LIGHT]

See R

adio and Player

System

<28–3>

B11

L–W

IH Right kick panel

W–B

ACC B ACC1 +B

BKLD H–L 2–4 IND1 IND2 GND1 PIND ILL+ ILL– IL–1 LIG+ AC+2

W–G

A17

G–R

B1

To Turn Signal

Flasher<11–2>

See Illumination

System<

9–3>

BUCKLE SW

S 5SE

AT B

ELT WA

RN

ING

OC

CU

PAN

T DETEC

TION

SEN

SOR

AN

D B

UC

KLE

SW

RH

To CenterAirbagSensorAssembly<17–3>

1

3

2

B–L

(*2 )

(*2 )(*2 )

(*2 )

A21

A/C

(*1 )From

Engine Control M

odule<

5–15>L

*10 : w/o Daytime Running Light

* 8 : w/o Door Lock Control* 7 : w/ Door Lock Control

* 9 : w/ Daytime Running Light

B A

C B

J23 J24,

JUNCTIONCONNECTOR

A B

1

2

4

3

IA49

AW–R(*1)

DL–R(*1)

17 IA5

D A

F B

A22ACC CUTRELAY

J21 J22,

JUNCTIONCONNECTOR

A B

See Engine C

ontrolS

ystem<

5–2>

L–O

(*1)

L–R(*1)

L–R(*1 )

L–O(*1 )

W–R

(*8 )

W–R

(*7 )

W–R

(*7)

W–R

(*1)

W–R

(*7)

1N11

To Turn Signal

Flasher<11–2>

1L11

INTEGRATIONRELAY

To CombinationMeter<29–2>

* 2 : 5VZ–FE

8 IA4

(*9)

(*10)

5 1N

10 1L

(*9)

(*10)W

–R

Page 310: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

2003 TOYOTA TUNDRA (EWD491U)

M OVERALL ELECTRICAL WIRING DIAGRAM

12

34

31

TO

YO

TA

TU

ND

RA

2

30A TOWING

12

140A

ALT

( *1)

100A

ALT

( *2)

12

30A TOW BRK

12

30A TOW TAIL

12

30A SUB BATT

12

40A AM1

2 1

22

22

2

2

AC

C

IG1

AM1

4

1I2

10A GAUGE

1E5

B–Y(*1) C C (*1)

B–Y

2

12

53

EA

Fron

t lef

tfe

nder

2

(*1)W–B

C C (*1)W–B

A A (*1)W–B

22

I23

IGN

ITIO

N S

W

2

12

53

222

12IA

420

IA4

4B

B2B

R–B

G

R–B

1IA

4

2

1B

B2

21IA

4

1

5B

B26

BB2

3B

K11

BK1

4B

5A

3B

3A

6A

1B

2A

2B

K11

BK2

4B

K12

BK2

BL

Sur

roun

ding

of

the

front

of

the

fuel

tank

42

BR

R

BR

R

BR(*1) G(*2)

R(*1)Y(*2)

2B

B2

1A

2B

7A

IHR

ight

kic

kpa

nel

C C

134

5

4A

3B

K2

W

B

G(*1)BR(*2)

L

W

B

89

3

Y

G–Y

G–B

G–W

T 6

A,

B

TRA

ILER

SO

CKE

T

AB

AA

JUNCTIONCONNECTOR

BAJ23 J24,

IELe

ft ki

ckpa

nel

6

T 9

TOW

ING

CO

NV

ERTE

RG

ND

+BR

TIN

LTIN

STIN

RTO

TLT

OT

TAIL

STO

P+B BR

KG

ND

B–Y B–Y

G

G–W

B–RB–R

W–B

BR

L

(*1)

(*1)(*1) (*1)

(*1)

(*1)

From Stop LightSW<13–3>

From IntegrationRelay<9–4>

From Stop LightSW<13–3>

From

Tur

n S

igna

lFl

ashe

r<11

–4>

W–B

Y

BR

L

G

L

B

W–B

W–BW–B

IA44

(*1)

( *1)L

(*1)

L

(*1) (*1)

(*1)

G

To Light Control SW[COMB. SW]<9–1>

J 8

JUN

CTI

ON

CO

NN

EC

TOR

J18

JUN

CTI

ON

CO

NN

EC

TOR

J 1

JUN

CTI

ON

CO

NN

EC

TOR

J 2

JUN

CTI

ON

CO

NN

EC

TOR

TOW

TAI

LR

ELA

Y

B–W

B–W

L–W

(*1)

W(*1)

L–W(*1)

B–W

B–R

(*1)

B–Y

( *1)

B–Y

B–L(*1) B (*2)

BA

TTE

RY

SUB

BA

TTR

ELA

Y

O 5

OPT

ION

CO

NN

EC

TOR

From Back–Up Light Relay<12–3>

( *1)

( *2)

( *1)

( *2)

Po

we

r S

ou

rce

Tra

iler

To

win

g*

2 : E

xcep

t Tow

ing

Pac

kage

* 1

: Tow

ing

Pack

age

(*1)BR(*1)

B/U

PS

TTL

STTR

GN

DB

ATT

TAIL

BR

K

(*1)(*1)

(*1) (*1)

Page 311: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 TOYOTA TUNDRA (EWD491U)

270

Page 312: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

M

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

271

[A] : System Title

[B] : Indicates the wiring color.

Wire colors are indicated by an alphabetical code.

B = Black W = White BR = Brown

L = Blue V = Violet SB = Sky Blue

R = Red O = Orange LG = Light Green

P = Pink Y = Yellow GR = Gray

G = Green

The first letter indicates the basic wire color and thesecond letter indicates the color of the stripe.Example: L – Y

L(Blue)

Y(Yellow)

[C] : The position of the parts is the same as shown inthe wiring diagram and wire routing.

[D] : Indicates the pin number of the connector.The numbering system is different for femaleand male connectors.Example : Numbered in order

from upper left tolower right

Numbered in orderfrom upper right tolower left

Female Male

The numbering system for the overall wiringdiagram is the same as above

[E] : Indicates a Relay Block. No shading is used and only the Relay Block No. is shown to distinguishit from the J/B.Example : Indicates Relay Block No.1

[F] : Junction Block (The number in the circle is theJ/B No. and the connector code is shown besideit). Junction Blocks are shaded to clearlyseparate them from other parts.

3C indicatesthat it is insideJunction BlockNo.3

Example:

[G] : Indicates related system.

[H] : Indicates the wiring harness and wiring harnessconnector. The wiring harness with maleterminal is shown with arrows ( ).Outside numerals are pin numbers.

Female Male ( )

[I] : ( ) is used to indicate different wiring andconnector, etc. when the vehicle model, engine type, or specification is different.

[J] : Indicates a shielded cable.

[K] : Indicates and located on ground point.

[L] : The same code occuring on the next pageindicates that the wire harness is continuous.

Page 313: 2003 TOYOTA TUNDRA ELECTRICAL WIRING DIAGRAM · 2018-10-18 · 2003 TOYOTA TUNDRA (EWD491U) 3 HOW TO USE THIS MANUAL B This manual provides informat ion on the electrical circuits

SYSTEM INDEXM

OV

ER

ALL E

LEC

TR

ICA

L WIR

ING

DIA

GR

AM

2003 TOY

OTA

TU

ND

RA

(EW

D491U

)

272

SYSTEMS LOCATION SYSTEMS LOCATIONABS 16–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Air Conditioning 30–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Back–Up Light 12–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cargo Light 30–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Charging 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cigarette Lighter 24–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Clock 24–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Combination Meter 29–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cruise Control (2UZ–FE) 5–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cruise Control (5VZ–FE) 6–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Door Lock Control (w/ Daytime Running Light) 20–2. . . . . . . . . . . . . . . . .

Door Lock Control (w/o Daytime Running Light) 21–2. . . . . . . . . . . . . . . .

Electronically Controlled Transmission and A/T Indicator (2UZ–FE) 14–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electronically Controlled Transmission and A/T Indicator (5VZ–FE) 15–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Engine Control (2UZ–FE) 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Engine Control (5VZ–FE) 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fog Light (w/ Daytime Running Light) 12–2. . . . . . . . . . . . . . . . . . . . . . . .

Fog Light (w/o Daytime Running Light) 8–3. . . . . . . . . . . . . . . . . . . . . . . . .

Headlight (w/ Daytime Running Light) 7–2. . . . . . . . . . . . . . . . . . . . . . . . . .

Headlight (w/o Daytime Running Light) 8–2. . . . . . . . . . . . . . . . . . . . . . . . .

Horn 27–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ignition (2UZ–FE) 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ignition (5VZ–FE) 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Illumination 9–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Integration Control and Panel 30–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Interior Light 10–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Key Reminder 26–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Light Auto Turn Off (w/ Daytime Running Light) 20–4. . . . . . . . . . . . . . . .

Light Auto Turn Off (w/o Daytime Running Light) 21–4. . . . . . . . . . . . . . .

Mirror Heater 17–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Outlet 24–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Seat 25–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Source 1~31–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Window 22–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Radio and Player 28–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Remote Control Mirror 27–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Seat Belt Warning 26–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SRS 17–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting (2UZ–FE) 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting (5VZ–FE) 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Stop Light 13–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Taillight 9–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Trailer Towing 31–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Turn Signal and Hazard Warning Light 11–2. . . . . . . . . . . . . . . . . . . . . . . . .

TVIP 23–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wiper and Washer 26–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wireless Door Lock Control 23–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4WD (2UZ–FE) 18–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4WD (5VZ–FE) 19–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .