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ENGINE CONTROL (5VZ-FE)
B- WW-B
G- B
(A/T)
I21
G- B
W-R
16 II3
D
D
(A/T)
J12
F10FUELPUMP
JUNCTIONCONNECTOR
BATT
ERY
W
1
2 2
C 6
S 4
I14
CIR
CU
IT O
PEN
ING
REL
AY
STOP LIGHT SW
IGNITION SW
EFI R
ELAYST
ARTE
RR
ELAY
1
2
2
G- Y 1
W-L
W-L
W-L
W-L
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L-O
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B-W
W-R W
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B- R B- R
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B- R
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120A
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30A
AM2
40A
AM1
A A
A B
EB
4
5
8II3
1IG1
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1 IE1
9 IE1
51
32
15
23
15
23
1
1
10 1F
2
22
22
22
22
22
4 1I
10AIGN
1F
10ASTOP
2
FROM POWER SOURCE SYSTEM (SEE PAGE 50)
20AEFI
ST2
IG2AM2
8
67
B-W
W-B
B- W
TO COMBINATIONMETER
2
IG16
BE BE
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J 7JUNCTIONCONNECTOR
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67
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I11 I11
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EC12
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E16
7. 5ASTA
E1 E15 B5 B6
(A/T)
A1 A2 A3 A4
1 5 1 1
332 2234
G- Y
B- W
W- L W- L W- L
L- B L- B
L- B
B- R
G- W
L- R
W- L
B- R B- R B- R B- R
B- RB- R
G- B
G-Y
B-W
Y-G
R-W B-W
L-B
Y
W-L
L-B
L-B
L-B
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W-L
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INJE
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I 6 I 7 I 8 I 9 I10
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B
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8 EMREL
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3C11
3C15
II314
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* 1 : W/ ADD W/ 2- 4 SELECT SW* 2 : W/ ADD W/O 2- 4 SELECT SW
E14
E,
IG114
W- B W- B
+B BATT STP #10 #20 #30 #40 #50 #60 NSW 4WD
FC STA THA VG E2G E2 PTNK VC VTA THW
68
ENGINE CONTROL (5VZ-FE)
R
C11
B-Y
KSW
I11
10AGAUGE
FROM POWER SOURCE SYSTEM (SEE PAGE 50)
1F8
EB11 EB13 EB12
9
12
I11 I11 I11 I11 I11
I11 I11
I11
I11
I11I11
E 2
1
2
1
2
11
E6 A27 CA28 16IMLD
B16 B24 A10
A16 A15 B7 E9 A6 B4 B12 D9 D8
12 3 2 4 2 42
3131831
W- L
BR
BR
B- RB- R
BR
W- L W- L W- L W- L W- L
BR
W-L
W-L
W-L
W-L
BR BR BR
W-L
RW
P-L
V-W
Y-G
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R
BR-R
B
BRBR
B GR
BR
GR
R G G R
BR
R-W
( SH
IELD
ED)
( SH
IELD
ED)
( SH
IELD
ED)
( SH
IELD
ED)
( SH
IELD
ED)
( SH
IELD
ED)
KNO
CK
SEN
SOR
NO
. 1
KNO
CK
SEN
SOR
NO
. 2
CRANKSHAFTPOSITION SENSOR
CAMSHAFTPOSITION SENSOR
K 2
K 3
C 2 C 1
VSV
( EVA
P)
VSV
( VAP
OR
PR
ESSU
RE
SEN
SOR
)
DAT
A LI
NK
CO
NN
ECTO
R 1
HEA
TED
OXY
GEN
SEN
SOR
( BAN
K 1
SEN
SOR
1)
HEA
TED
OXY
GEN
SEN
SOR
( BAN
K 1
SEN
SOR
2)
V 7
V 8
D 1
H 3
H 4
IDLE
AIR
CO
NTR
OL
VALV
EI 1
( SH
IELD
ED)
( SH
IELD
ED)
E 9 A E10ENGINE CONTROL MODULE
B E11 C E12 D
TE1 HT OX
+B E1 +B E1 +B E1
HT OX
1 2 2 1
BR
C29
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II313II36
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II326
Y-G
( *6)
( *6)
( *6)
( *6)
B12AF1+
B21AF1-
B4HTAF1
3 2
14
AIR
FU
EL R
ATIO
SEN
SOR
A27
W B
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-LW
( *5)
( *5)
( *5)
( *5)
( *5)
I11
W-L
W- L
(*5)
( SH
IELD
ED)
E14 E,
( *7)
( *7)
W- B
W- B
W KNK1 KNK2 NE+ NE- G2
RSO RSC EVP1 TPC TE1 HT OX1 HTS OXS
69
G-O
7. 5AOBD
FROM POWER SOURCE SYSTEM (SEE PAGE 50)
2
IG13
I11
I11 I11 I11
B17 A21 A30 A31 D4 D13 D25
A11 A12 A13 A25 E11
IEECEC
2
1
2
1
2
1
II318
5 4
4567
10 2 1 9 8
7 16
A
BR
BR
B- R B- R B- R
W
BR
BR
BR
BR
BR
B-L
L-Y
G-W B-
Y
B-R
B-R
B-R
B-R B
B-R
B-R
B-R
VVW
W-B
BR-R
BR
W-B
BR-R
L-Y
L-B
Y-G
W-B
W-B
W-BBR
W-B
BR
IGN
ITIO
N C
OIL
NO
. 1
IGN
ITIO
N C
OIL
NO
. 2
IGN
ITIO
N C
OIL
NO
. 3
IGNITER
I 3 I 4 I 5
I 2
D 7
DAT
A LI
NK
CO
NN
ECTO
R 3
JUNCTIONCONNECTOR
J 4
TO C
OM
BIN
ATIO
NM
ETER
ENG
INE
CO
NTR
OL
MO
DU
LEE
9A
E10
BE1
1C
E12
D
2
1
IGC1 IGC3 IGC2 +B EXT
IGT1 IGT2 IGT3 IGF
SIL BAT
SG CG
IJ11 IJ18
8
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L-B
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ETER
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ER S
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ING
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E SW
B13 (*3)A8 (*4)
B10A3
L-B
L-Y
( *3)
( *3)
( *4)
( *4)
( *4)
( *4)
8E05BE12
EOM
3E13
3E16
A
IF
J 9JUNCTIONCONNECTOR
W-B
W-B
W-B
C C
3
GND
JUNCTION CONNECTORJ 6
C4CODE
C5RXCK
C10TXCT
4
TXCT
3
RXCK
2
CODE
P-B
R-B
GR
-R
T 6TRANSPONDER KEYAMPLIFIER
( *5)
* 3 : AUTOMATIC A/C* 4 : MANUAL A/C
* 6 : EXCEPT CALIFORNIA(*
7) A12A/C AMPLIFIER
BA , A30
(*7)
( *7)
( *7)
* 5 : CALIFORNIA* 7 : W/ THEFT DETERRENT SYSTEM
(*7)
E14
E,
AW- B
W- B
SP1 E1 E01 E03 E02 IDLO ACT AC1
IGT1 IGT2 IGT3 IGF SIL
70
ENGINE CONTROL (5VZ-FE)
The engine control system utilize a microcomputer and maintains overall control of the engine, transmission, etc. An outlineof engine control is given here.
1. INPUT SIGNAL(1) Engine coolant temp. signal system
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 as a control signal to TERMINAL THW ofthe engine control module.
(2) Heated oxygen sensor signal systemThe oxygen density in the exhaust emissions is detected and input as a control signal to TERMINAL OX1 or OXS of theengine control module. To maintain stable detection performance by the heated oxygen sensor, the heated oxygensensors are warmed. The heater is also controlled by the engine control module (HT or HTS).
(3) RPM signal systemCamshaft position and crankshaft position are detected by the camshaft position sensor and crankshaft position sensor,camshaft position is input as a control signal to TERMINAL G2 of the engine control module, and engine RPM is input toTERMINAL NE+.
(4) Throttle signal systemThe throttle position sensor detects the throttle valve opening angle, which is input as a control signal to TERMINAL VTAof the engine control module.
(5) Vehicle speed signal systemThe vehicle speed sensor, detects the vehicle speed and input to ABS speed sensor of the ABS ECU, from ABS ECU toTERMINAL SP1 of the engine control module, via combination meter.
(6) A/C SW signal systemThe operating voltage of the A/C magnetic clutch is detected and input as a control signal to TERMINAL AC1 of theengine control module.
(7) Battery signal systemVoltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned to on,voltage for engine control module operation is applied via the EFI relay to TERMINAL +B of the engine control module.
(8) Intake air volume signal systemIntake air volume is detected by the mass air flow meter and a signal is input into TERMINAL VG of the engine controlmodule as a control signal.
(9) Stop light SW signal systemThe stop light SW is used to detect whether or not the vehicle is braking and the information is input as a control signalto TERMINAL STP of the engine control module.
(10)Starter signal systemTo confirm that the engine is cranking, the voltage applied to the starter motor during cranking is detected and is input asa control signal to TERMINAL STA of the engine control module.
(11) Engine knock signal systemEngine knocking is detected by the knock sensor no. 1 and no. 2 and the signals are input to TERMINALS KNK1 andKNK2 of the engine control module.
(12)4WD signal system (4WD)Whether or not the vehicle is operating in 4WD mode is determined, and a control signal is input to TERMINAL 4WD ofthe engine control module.
(13) 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 into TERMINAL THA of the engine control module.
(14)Air fuel ratio signal system (California)The air fuel ratio is detected and input as a control signal into TERMINAL AF1+ of the engine control module.
SYSTEM OUTLINE
71
2. CONTROL SYSTEM∗ SFI system
The SFI system monitors the engine conditions through the signals each sensor inputs to the engine control module.Based on this data and the program memorized in the engine control module, the most appropriate fuel injection timingis detected and current is output to TERMINALS #10, #20, #30, #40, #50 AND #60 of the engine control module,causing the injectors to operate (to inject fuel). It is this system which, through the work of the engine control module,finely controls fuel injection in response to driving conditions.
∗ ESA systemThe ESA system monitors the engine conditions using the signals input to the engine control module from each sensor.Based on this data and the program memorizes in the engine control module, the most appropriate ignition timing isdecided and current is output to TERMINALS IGT1, IGT2 and IGT3 of the engine control module. This output controlsthe igniter to produce the most appropriate ignition timing for the driving conditions.
∗ Heated oxygen sensor heater control systemThe heated oxygen sensor heater control system turns the heater to on when the intake air volume is low (Temp. ofexhaust emissions is low). And warms up the heated oxygen sensors to improve detection performance of the sensors.The engine control module evaluates the signals from each sensor current is output to TERMINAL HT or HTS andcontrols the heater.
3. DIAGNOSIS SYSTEMWith the diagnosis system, when there is a malfunction in the ECU signal system, the malfunctioning system is recorded inthe memory. The malfunctioning system can then be found by reading the display (Code) of the malfunction indicator lamp.
4. FAIL- SAFE SYSTEMWhen a malfunction occurs in any system, if there is a possibility of engine being caused by continued control based on thesignals from that system, the fail-safe system either controls the system by using data (Standard values) recorded in theengine control module memory or else stops the engine.
72
ENGINE CONTROL (5VZ-FE)
EFI RELAY [ENGINE ROOM R/B]5-3 : Closed with ignition SW at ON or ST position
C6 CIRCUIT OPENING RELAY5-3 : Closed with starter running or ignition SW at ON position
I6, I7, I8, I9, I10, I11 INJECTOR1-2 : 13.4- 14.2 Ω
T2 THROTTLE POSITION SENSOR1-2 : 2.5- 5 kΩ
E3 ENGINE COOLANT TEMP. SENSOR1-2 : 10- 20 kΩ (-20 °C, -4 °F)
4- 7 kΩ (0°C, 32°F)2- 3 kΩ (20°C, 68°F)0.9- 1.3 kΩ (40°C, 104°F)0.4- 0.7 kΩ (60°C, 140°F)0.2- 0.4 kΩ (80°C, 176°F)
E9 (A), E10 (B), E12 (D), E14 (E) ENGINE CONTROL MODULEVoltage at engine control module wiring connectors
+B-E1 : 9- 14 volts (Ignition SW on)BATT-E1 : 9- 14 volts (Always)
VC-E2 : 4.5- 5.5 volts (Ignition SW on)VTA-E2 : Approx. 0.6 volts (Ignition SW on and throttle valve fully closed)
Approx. 4 volts (ignition SW on and throttle valve fully open)STA-E1 : 6 volts or more (Ignition SW at ST position)
W-E1 : 9- 14 volts (No trouble and engine running)THW-E1 : 0.2- 1.0 volts (Ignition SW on and coolant temp. 80°C, 176°F)SP1-E1 : Pulse generation with vehicle movingSTP-E1 : 7.5- 14 volts (Stop light SW on)
IGT1, IGT2, IGT3-E1 : Pulse generation (Cranking or idling)#10, #20, #30, #40, #50, #60-E1 : 9- 14 volts (Ignition SW on)
RESISTANCE AT ECU WIRING CONNECTOR(Disconnect wiring connector)
THW-E2 : 0.2- 0.4 kΩ (Coolant temp. 80°C, 176°F)NE+-E2 : 140- 180 Ω
: PARTS LOCATION
Code See Page Code See Page Code See PageA12 A 32 H3 28 (5VZ-FE) J6 33
A27 28 (5VZ-FE) H4 28 (5VZ-FE) J7 A 33A30 B 32 I1 29 (5VZ-FE) J8 B 33
C1 28 (5VZ-FE) I2 29 (5VZ-FE) J9 33C2 28 (5VZ-FE) I3 29 (5VZ-FE) J12 34C6 32 I4 29 (5VZ-FE) K2 29 (5VZ-FE)C18 28 (5VZ-FE) I5 29 (5VZ-FE) K3 29 (5VZ-FE)C29 32 I6 29 (5VZ-FE) M1 29 (5VZ-FE)D1 28 (5VZ-FE) I7 29 (5VZ-FE) P22 29 (5VZ-FE)D7 32 I8 29 (5VZ-FE) S4 33E3 28 (5VZ-FE) I9 29 (5VZ-FE) T2 29 (5VZ-FE)
E9 A 33 I10 29 (5VZ-FE) T6 33E10 B 33 I11 29 (5VZ-FE) V1 29 (5VZ-FE)E11 C 33 I14 33 V7 29 (5VZ-FE)E12 D 33 J1 A 29 (5VZ-FE) V8 29 (5VZ-FE)E14 E 33 J2 B 29 (5VZ-FE)
F10 34 J4 33
SERVICE HINTS
73
: RELAY BLOCKS
Code See Page Relay Blocks (Relay Block Location)2 22 Engine Room R/B (Engine Compartment Left)
���������
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)1F 24 Cowl Wire and Driver Side J/B (Lower Finish Panel)1I 24 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)1J 24 Cowl Wire and Driver Side J/B (Lower Finish Panel)3C
26 Cowl Wire and Center J/B (Near the Steering Column Tube)3E
26 Cowl Wire and Center J/B (Near the Steering Column Tube)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)EB1 38 (5VZ-FE) Knock Sensor Wire and Engine Wire (Front Side of Cylinder Head Cover Right)EC1 38 (5VZ-FE) Engine Wire and Water Temp. Sensor Wire (Front Side of Cylinder Head Cover Right)IE1 42 Cowl Wire and Floor No.2 Wire (Left Kick Panel)IG1 42 Engine Room Main Wire and Cowl Wire (Left Kick Panel)II3 42 Engine Wire and Cowl Wire (On the Glove Box)IJ1 42 Cowl Wire and A/C Sub Wire (Near the A/C Unit)
: GROUND POINTS
Code See Page Ground Points LocationEB 38 (5VZ-FE) Front Left FenderEC 38 (5VZ-FE) Intake Manifold LeftIE 42 Cowl Side Panel LHIF 42 Cowl Side Panel RH
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice PointsE2 38 (5VZ-FE) Sensor Wire I21 42 Cowl WireI11 42 Engine Wire
