54 Chassis Electrical

8/10/2019 54 Chassis Electrical

1/70

CHASSIS

D

ELECTRICAL

CONTENTS

AIR CONDITIONING

SPECIAL TOOL

.......................

...................

Refer to GROUP 55

COMBINATION METERS

.......

ANTENNA

........................

,

67

COMBINATION METERS

...........

ANTI-LOCK BRAKING SYSTEM

GENERAL INFORMATION

.........

.................

Refer to GROUP 35B

ON-VEHICLE SERVICE

.............


2/70


3/70

CHASSIS ELECTRICAL - Battery

BATTERY

.

I

I

Indicator

White

6

Charging

necessary

Good

condition

r--r

0

r--

6X1 66

ON-VEHICLE SERVICE

BATTERY CHECK

BATTERY VISUAL INSPECTION (1)

The battery contains a visual test indicator

blue signal when an adequate charge level

white signal when charging is required.

BATTERY VISUAL INSPECTION (2)

Make sure ianition switch is in OFF position

fed

1.

2.

accessories are OFF.

Disconnect (-) ground cable from battery

necting (+) cable.

Remove the battery from the vehicle.

Caution

Care should be taken in the event ba

cracked or leaking to protect hands fro

lyte. A suitable pair of rubber gloves (n

hold type) should be worn when rem


4/70

CHASSIS ELECTRICAL - Batterv

Charge Rate Chart

Battery

Slow charging

Fast charging

55824L (433 amps)

5 10 hrs.mps

10 5 hrs.mps

20 2.5 hrs.mps

30 1.5 hrs.mps

BATTERY TESTING PROCEDURE

TEST STEP

(1) Remove negative cable, then positive cable. Clean termrnals and clamps.

Check for loose battery post. e Replace battery


5/70

HASSIS ELECTRICAL -

Ignition Switch

IGNITION SWITCH

I .

GENERAL INFORMATION

OPERATION

Ignition key reminder warning buzzer circuit

When, with the ignition key inserted in the key

cylinder (with the key reminder switch at OFF),

the drivers door is opened (door switch is

switched ON), the ECU detective circuit will

activate.

This system is controlled by either ETACS-ECU

or BUZZER-ECU on non-ETACS equipped ve-

hicles.

With the detective circuit activated

put from the drive circuit make

sound intermittently to remind th

is still in the ignition switch.

SPECIAL TOOLS

Scan tool (MUT-II)


6/70

54-6 CHASSIS ELECTRICAL -

Ignition Switch

TROUBLESHOOTING

DIAGNOSTIC FUNCTION

INPUT SIGNAL INSPECTION POINTS

When Using the Scan Tool

1. Connect the scan tool to the data link

Caution

The ignition switch should always be tur

connecting and disconnecting the sc

2. If buzzer of the scan tool sounds once

is operated (ON/OFF), the ETACS-ECU

that switch circuit system is normal.


7/70

CHASSIS

ELECTRICAL Ignition Switch *

INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS

INSPECTION PROCEDURE 1

Communication with scan tool is not possible. (Communication with

all systems is not possible.)

Probable cau

I

he reason is probably a defect in the power supply system (including ground) for the diagnostic line.

Malfunction of

Malfunction of

Refer to GROUP 13A - Trouble-

shooting.


Communication with scan tool is not possible. (Communication with

the one-shot pulse input signal only is not possible.)

The cause is probably a defective one-shot pulse input signal circuit system of the diagnostic line.

Check the following connector.

NG


8/70

54-8

CHASSIS ELECTRICAL - Ignition Switch

INSPECTION PROCEDURE

4

The ignition key reminder warning buzzer does not stop sounding by

Probable c

removing the ignition key.

(The buzzer does not sound by closing the drivers door.)

It s possible that there is a malfunctionof the key reminder switch input circuit or the ECU.

Malfunction

Malfunctron

Malfunction

Malfunction

Scan Toot Input Signal Inspection

Key reminder switch input signal

OK: The scan tool buzzer sounds once

when the key reminder switch IS

removed or inserted.

Replace the ECU.

For the Input check, open the door.

&ehrcles with buzzer-E

I


9/70

E

HASSIS ELECTRICAL - Ignition Switch


The ignition key reminder warning buzzer does not sound when the

ignition key is inserted in the key cylinder and the drivers door is

opened.

Probable ca

(The ignition key is turned to OFF position.)

It

s possible that there is a malfunction of the door switch input circuit or the key reminder switch input Cir-

cult, in case the ignltlon key hole Wminationlight IS defective.

Malfunction of

switch

Malfunction of

Malfunction of

Malfunction of

Malfunction of

,Drivers side door switch input signal


10/70

54- 10- CHASSIS ELECTRICAL - Ignition Switch

IGNITION SWITCH

REMOVAL AND INSTALLATION

I

f

CAUTION: SRS

Before removal of air bag module and clock

spring, refer to the following items:

GROUP 52B - SRS Service Precautions

GROUP 52B - Air Bag Module and Clock Spring

5

I


11/70


A13R0019

REMOVAL SERVICE POINT

dA, STEERING LOCK CYLINDER REMO

1.

2.

Insert the key in the steering lock cylind

to the ACC position.

Using a cross-tip (+) screwdriver (small)

push the lock pin of the steering lock c

and then pull the steering lock cylinder

INSTALLATION SERVICE POINT

.A+ CLOCK SPRING AND COLUMN SWITC

INSTALLATION

1. Tighten the screws in the order shown.


12/70

54- 12


INSPECTION

IGNITION SWITCH CONTINUITY CHECK

1. Remove the column cover lower and up

2. Disconnect the wiring connector from the

and connect an ohmmeter to the switch

3. Operate the ignition switch and check t

Ignition key

position

LOCK

ACC

ON

START

Terminal No.

1 2

3

A

n

n


13/70

CHASSIS ELECTRICAL - Combination Meters

COMBINATION METERS

GENERAL INFORMATION

OPERATION

Fuel gauge

When the ignition key is at the ON position,

the fuel gauge is activated.

When there is much fuel, the units resistance

is small and the current flowing in the circuit

is great, so the gauges indicator indicates in

the F area.

When there is little fuel, the units resistance

is high and the current flowing in the circuit

is small, so the gauges indicator indicates in

the E area.

0

The electric type speedometer u

circuit to pulse the wave of the

from the vehicle speed sensor. Af

vehicle speed, the speedometer

drives the pointer.

Brake warning light

This warning light illuminates when th

is in ON position, and goes off af

has started. This indicator comes on w

ing brake is applied or brake fluid le

the specific level.

Engine coolant temperature gauge

When the ignition key is at the ON position,

the engine coolant temperature gauge is acti-

vated.

When the engine coolant temperature is high,

Oil pressure warning light

This warning light illuminates when t

is in ON position, and goes off aft

has started. This indicator comes

engine stalls or trouble occurs in the


14/70

54- 14


Items

Fuel gauge resistance Q

Power supply and ground

Power supply and fuel gauge

Fuel oauoe and qround

Standard values

192 2 19.2

a9 f a.9

103 f 10.3

Engine coolant temperature gauge

resistance 52

Power supply and ground la7 f la.7

Power supply and engine cool- 90 * 4.5

ant temperature gauge

Engine coolant temperature

/ gauge and ground

Engine coolant temperature gauge unit resistance

fat 70C (158F)l &I

247 2 24.7

104 f 13.5

SEALANT

tems

Specified sealants

Engine coolant temperature gauge unit threaded 3M Adhesive nut locking No. 4171 or equ

portion

SPECIAL TOOLS


15/70

*HASSIS ELECTRICAL -

Combination Meters

e

I

TROUBLESHOOTING

INSPECTION CHART FOR TROUBLE SYMPTOMS

Trouble symptom

Speedometer does not work.

IL

Tachometer does not work.

) INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS

Inspection

procedure

1

2

Inspection Procedure 1

Speedometer does not work. Probable cause

The cause may be a defective vehicle speed sensor circuit system or a defective

Malfunction of vehicle speed sen

speedometer. Vehicle speed sensor is also used by the engtne-ECU and A/T-ECU. Malfunctron of speedometer

Malfunction of harness or connec

-1. NG

Disconnect the combination meter t Vehicle speed sensor crrcurt system

connectors B-07 or B-08 and measure

inspection (Refer to

inspection

at the harness sides.

Procedure 3 on P.54-16.)

Measure the voltage between

terminal No.51 and ground when the

vehicle is moved forwards and 2. NG

NG


16/70

a

54-16

CHASSIS ELECTRICAL -

Combination Meters


1

Tachometer does not work.

1

Probable cause

The ignrtron srgnal may not be input from the engine, or there may be a malfunction

Malfunction of tachometer

in the power supply or ground circuit. Malfunction of harness or conne

Disconnect the combination meter con-

nector B-07and measure at the harness

sides.

1. Measure the voltage between

terminal No.33 and ground.

OK: 5 V

2. Continuity between the terminal

No.34 and ground

OK: Contrnuity

3. Voltage between the terminal No.42

and ground

OK: System voltage

OK

3. NG

1. NG

- Check the followi

B-35, A-61 and B-38

IOK

NG

-) Repair

2. NG

- Check the following connectors.

B-23

NG

* Repair

Check the harnes


17/70

HASSIS ELECTRICAL - Combination Meters

I

I

B16SOOO1

I

Tie-down hook

A16t.70238

ON-VEHICLE SERVICE

SPEEDOMETER CHECK

1.

2.

3.

4.

5.

6.

Adjust tire pressure to the specified le

GROUP 31 - Service Specifications.)

Set the vehicle onto a speedometer tester

chocks to hold the rear wheels.

Make sure the parking brake has been

To prevent the front wheel from moving from

attach tension bars to the tie-down hoo

both ends to anchor plates.

To prevent the vehicle from launching, a

or wire to the rear retraction hook, and m

end of the chain or wire is secured firm

Check if the speedometer indicator range

standard values.

Caution

Do not operate the clutch sudde


18/70

54- 18


2.

Compare the readings of the vehicle tachom

external tachometer at every engine spee

if the variations are within the standard

FUEL GAUGE SIMPLE CHECK

Standard values:

700

r/min

:

2100 r/min

3,000 r/min

: rt150 r/min

5,000 r/min

: k250 r/min

6,000 r/min

: 2300 r/min

Repair the harness.


19/70


A

1 Point E

/

(lowest)

&opper

A16X0406

Thermistor Ground

Thermistor

u 16M0224

16SOO12

00004632

FUEL GAUGE UNIT FLOAT HEIGHT

Move float and measure the height A at po

and B at point E (lowest) with float arm tou

Standard value:

A: 17.4

mm

B: 130.2 mm

Adjust the float arm to the standard value,

to the thermistor check. I

THERMISTOR

1. Connect fuel gauge unit (thermistor) to b

lamp (12 V - 3.4 W). Immerse in water.

2. Condition is good if lamp goes off when

is immersed in water and comes on wh

out of water.

Caution

After finishing this test, wipe the unit d

it in the fuel tank.

3. If all checks are correct, the fuel gauge


20/70

54 20


Combination Meters

ENGINE COOLANTTEMPERATURE G

CHECK

Bleed the engine coolant.

(Refer to GROUP 00 - Maintenance Ser

Remove the engine coolant temperature

Immerse the unit in 70C water to measure t

Standard value:

104 * 13.5 Q

If within the standard value, the sensor is

it, then check the engine coolant temper

(Refer to P.54-21.) If not within the standard

it.


21/70

HASSIS ELECTRICAL - Combination Meters

COMBINATION METERS


b


22/70

54-22


(g \\ Ground

FUEL GAUGE RESISTANCE CHECK

1. Remove the power supply tightening scre

2. Use an ohmmeter to measure the res

between the terminals.

Standard value:

Power supply - Ground: 192 + 19.

Power supply -

Fuel gauge: 89 +

Fuel gauge -

Ground: 103 f 10.3

3. If within the standard value, the fuel gau

If not within the standard value, replace th

Caution

When inserting the testing probe into the

terminal, be careful not to touch the p


23/70

HASSIS ELECTRICAL - Combination Meter

DISASSEMBLY AND REASSEMBLY


24/70

54-24


Headlight and Turn-signal Light

HEADLIGHT AND TURN-SIGNAL LIGHT

GENERAL INFORMATION

OPERATION

Low-beam and high-beam

Turn the lighting switch to second position,

and the contact point of the headlight relay

will be closed to turn on the headlight relay.

Pull the dimmer switch to LO, and the

low-beam will be lit. Pull the switch to HI,

and the high-beam will be lit.

Passing

When the low-beam is lit, pull the passing switch

to ON, and the high-beam will be lit together

with the low-beam.

When the dimmer switch is at LO and the

lighting switch is at OFF or first position,

and the passing switch is pulled ON, the

contact point of the headlight relay will be

closed, turning on the headlight relay, and the

low-beam and high-beamwill be simultaneously

When the capacitor becomes

the microprocessor (within the

output reverses and transistor is

the relay contact is also switch

as a result, the LH (or RH) tu

and turn-signal indicator light are

At the same time that transist

flasher unit) is switched OFF,

begins discharging, and, when

finishes, the output of the microco

the flasher unit) once again

transistor (within the flasher un

ON, after which the LH (or R

lights and turn-signal indicator l

As a result of the continued re

steps described above, the

turn-signal lights and turn-signal


25/70

E

CHASSIS ELECTRICAL - Headlight and Turn-signal Light

SERVICE SPECIFICATIONS

Items

Headlight intensity

Limit

20,000 cd or more

SPECIAL TOOLS


26/70

54-26 CHASSIS ELECTRICAL - Headlight and Turn-signal Light

TROUBLESHOOTING

TROUBLESHOOTING HINTS

Headlight

1. None of the headlight comes on.

(1) Tail light comes on.

Check the headlight relay.

(Refer to P.54-33.)

Check the lighting switch.

(Refer to P.54-34.)

(2) The tail light neither comes on nor does

the charging warning light go out.

Check the fusible link No. 6.

Low-beam does not come on on either side.

Check the grounding circuit.

Check each headlight.

High-beam does not come on on either side

but comes on when the passing switch is ON.

Check the dimmer switch.

(Refer to P.54-34.)

High-beam indicator light does not come on.

However, high-beam is lit when the dimmer

switch is at HI position or the passing switch

Turn-signal light

1. The turn-signal lights and hazard-

do not operate at all.

Check the hazard warning

contact (power supply side

Check the flasher unit.

2. All turn-signal lights at the left

do not function.

The hazard-warning lights funct


contact (turn-signal side).

Check the turn-signal switc

(Refer to P.54-34.)

3. The number of flashes of the tu

is excessive.

Check the bulbs.

4. The hazard-warning lights do

The turn-signal lights function


contact (hazard-warning lig


27/70


INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS


Communication with the scan tool is impossible.

Probable cause

(Communication with all systems is impossible.)

The cause is probably a defective power supply system (including ground) for the

Malfunction of connector

diagnoses line.

Malfunction of harness wire

i Refer to GROUP 13A - Troubleshoot-

rng.


Communication with the scan tool is impossible. Probable cause

(Communication with the one-shot pulse input signal only

is impossible.)

The cause is probably a defective one-shot pulse input circuit system of the diagnosis

Malfunctron of connector

kne.

Malfunction of harness wire

Malfunction of ETACS-ECU

OK NG

Check the harness wire between the

-

+ Repair

diagnosis connector and junction block.


28/70


29/70


Vertical direction

adjustment

I

Adjusting

range

Al 620047

VERTICAL ADJUSTING

Adjust the vertical angle by rotating the ver

screw so that the bubble in the vertical adjusting

inside the adjusting range.


30/70

54-30 CHASSIS ELECTRICAL - Headlight and Turn-signal Light


31/70

CHASSIS ELECTRICAL - Headlight and Turn-signal Light *

Al6M0003

NOTE

If the visual headlight adjustment at low b

the adjustment at high beam is not nece

VERTICAL ADJUSTING

c4-door models>

1.

Adjust the vertical angle by rotating the ve

screw so that the bubble in the vertical ad

locates inside the adjusting range.

2. Check to see if the light distribution pro

aiming screen is the same as the light distr

described in Visual Headlight Adjustment.

3. If they differ, turn the vertical adjusting s

the vertical angle until the light distribution

the correct lighting pattern.


32/70

54-32


LUMINOUS INTENSITY MEASUREME

Measure the luminous intensity of head

photometer in accordance with the instru

prepared by the manufacturer of the photome

sure that the luminous intensity is within the

Limit: 20,000 cd or more

NOTE

(1) When measuring the luminous intensity of

the engine at 2,000 r/min and have the ba

(2) If there are specific regulations for lumino

headlights in the region where the vehicle

make sure that the intensity conforms to th

of such regulations.


33/70


HEADLIGHT AND FRONT TURN-SIGNAL LIGHT



34/70

54-34


Headlight and Turn-signal Light

16MOOll

REMOVAL SERVICE POINT

+A, FRONT TURN-SIGNAL LIGHT REMOV

Pry a screwdriver into the direction shown to m

turn-signal light forwards.

+B, HEADLIGHT REMOVAL

c2-door mod

1. Pull the bumper towards you.

2. Pull the inside of headlight towards you.

3. Pull the outside of headlight towards you.

4. Remove the headlight.


35/70

CHASSIS ELECTRICAL - Headlight and Turn-signal Light.

Connector A

16R0093

1610372

4869

LIGHTING SWITCH, DIMMER/PASSING SW

TURN-SIGNAL LIGHT SWITCH CHECK

LIGHTING

SWITCH

Switch position

DIMMER/

PASSING

SWITCH


36/70

54-36


Fog Light

FOG LIGHT

GENERAL INFORMATION

OPERATION

If the fog light switch is set at the ON position Once the fog light relay contacts

when the lighting switch is at the second

current flows through the dedica

position and the dimmer switch is at the low light relay (contacts), fog light

beam position,

current flows through the

causing the fog lights to go on

headlight relay, dedicated fuse, fog light relay,

fog light switch, diode, dimmer switch and

ground, causing the fog light relay contacts

to close.

SERVICE SPECIFICATIONS

Items

Fog light aiming

Vertical direction

Horizontal direction

Standard value

100 mm (4 in.) below horizontal (H)

Parallel to direction of vehicle travel

SPECIAL TOOL

.


37/70

CHASSIS ELECTRICAL - Fog light

10. Remove the fog light bezel.

30 mm (1.2 in.)

I

56 mm

(2.2 in.)

16MO331

11. Measure the center of the fog lights as

illustration.


38/70

54-38

CHASSIS ELECTRICAL - Fog Light

BULB REPLACEMENT

1. Remove the fog light bezel.

2. Remove the fog light unit fixing screw, an

unit to remove it.

3. Remove the cap.


39/70

FOG LIGHT

CHASSIS ELECTRICAL - Fog Light



40/70

54-40


Fog Light/Rear Combination Light

relay

t\\

\ \ \

I

123

4

El

5

4

??4

3

0420001

00004798

FOG LIGHT RELAY CONTINUITY CHECK


41/70

*

HASSIS ELECTRICAL - Rear Combination Light

SPECIAL TOOLS

Scan tool (MUT-II)

MB991 496-OD

ETACS-ECU

inpu

ETACS-ECU

inpu

Tool not necessary if

scan tool is

ETACS-ECU

inpu

(When

using a vo


42/70

54-42


Rear Combination Light


r

ommunication with scan tool is not possible. (Communication with

one-shot pulse input signal only is not possible.)

Probable ca

The cause probably a defective one-shot pulse input signal circuit system of the diagnostic line.

Malfunction o

Malfunction o

Malfunction o

Repair


NG

IOK

Check trouble symptom.

1 NG

t

Replace the ECU.

Repair

While the tail lights or headlight are illuminated, drivers side door is

Probable ca

opened but the light reminder warning buzzer does not sound. (With

the ignition key inserted in the key cylinder, the ignition key reminder

warning buzzer sounds.)

The cause is probably a defective lighting switch input circuit system or a defective ECU.

Malfunction o


43/70

HASSIS ELECTRICAL - Rear Combination Light

REAR COMBINATION LIGHT



44/70


45/70

CHA&S ELECTRICAL - Interior Light

INTERIOR LIGHT

GENERAL INFORMATION

OPERATION

Luggage compartment light

Battery voltage is always applied (via fusible

link No. 2 and dedicated fuse No. 2) to the

luggage compatment light.

When the trunk lid is opened, the trunk lid latch

switch is switched ON and the luggage

compartment light illuminates.

TROUBLESHOOTING


Luggage compartment light

Luggage compartment light does not come on.

Check the bulb.

Dome light

The dome light is always illumina

dome light switch is, at the ON

The dome light illuminates when

opened while the dome light sw

DOOR position.

The dome light does not illumina

dome light switch is switched O

of door positions.

3. The dome lioht does not illu

with the dome light switch a

position, a certain door or

opened.


46/70

54-46

CHASSIS ELECTRICAL - Interior Liaht

INTERIOR LIGHT



47/70

CHASSIS ELECTRICAL - Rheostat

RHEOSTAT

SPECIAL TOOL

1

Tool

1

Tool number and name

/

Super-session

1

Use

I

1

MB990784

General service tool

Removal of switch

/ Ornament remover

RHEOSTAT

REMOVAL AND

INSTALLATION

-


48/70

.


49/70

HORN

CHASSIS ELECTRICAL - Horn

GENERAL INFORMATION .

OPERATION

Battery voltage is always applied to the horn

relay through dedicated fuse No. 4.

When the horn switch is turned ON, the con-

tact point of horn relay will be closed to turn

TROUBLESHOOTING

ON the horn relay. While the

ON, the horn sounds.


1.

Horn does not sound.

Check the dedicated fuse No. 4.

Check the horn relay.

Check the horn switch.

2.

I

Check the horn.

HORN

Check the ground circuit.

Check connectors and wirin

Only one horn sounds.

Check the horn.

Check connectors and wirin


50/70

54-50


Cigarette Lighter

CIGARETTE LIGHTER

GENERAL INFORMATION

OPERATION

If the plug is pressed into the socket, the plug

will remain in, and the cigarette lighter will be

turned ON.

TROUBLESHOOTING

The element area of the plug is

The plug will automatically return

the cigarette lighter.


1.

Cigarette lighter does not operate.

Check the cigarette lighter.

(Refer to P.54-50.)

CIGARETTE LIGHTER

2. Cigarette lighter illumination light d

on or is dim.

Check the rheostat. (Refer



51/70

54-52

CHASSIS ELECTRICAL - Radio and Tape Player


52/70

RADIO AND TAPE PLAYER

SPECIAL TOOL

Tool

1

Tool number and name

1

Supersession

/

Use

M B990784

General service toot

Audio panel rem

TROUBLESHOOTING

QUICK-REFERENCE TROUBLESHOOTING CHART

Items

Noise

Problem symptom

Noise appears at certain places when travelling (AM).

Noise appears at certain places when travelling (FM).

Mixed with noise, only at night (AM).


53/70



54/70

1 A-2 Noise appears at certain places when traveling (FM).

~ Yes

Do the following measures eliminate the noise?

Change to a different station with a strong slgnal to boost resistance to interference.

Suppress high tones to reduce noise.

Extend antenna completely.

No

If there is more noise than other radios, find out the noise conditions and the name and

frequency of the radio stations from the user, and consult with the service center.

NOTE

About FM waves:

FM waves have the same properties as light, and

can be deflected and blocked. Wave reception is

not possible in the shadow of obstructions such

as buildings or mountains.

1. The signal becomes weak as the distance from

the stations transmission antenna increases.

Although this may vary according to the signal

strength of the transmitting station and interven-

ing geographical formation or buildings, the

area of good reception is approx. 20-25 km

--cl OK

where there are obstructions such

or buildings between the antenna

and noise will appear.


55/70

1 A-3 Mixed with noise, only at night (AM).

The

following factors can be considered as possible

causes of noise appearing at night.

1. Factors due to signal conditions: Due to the

fact that long-distance signals are more easily

k

received at night, even stations that are

received without problem during the day may

experience interference in a general worsening

of reception conditions. The weaker a station

is the more susceptible it is to interference,

No

lrghts OFF?

4 Yes

yes

OK

o the following measures eliminate

the noise?

Tune to a station with a strong sig-

nal.

Tuneto a stationwith a strong signal

without completely extending the

I

antenna.

T

and a change to a different stat

pearance of a beating sound*

Beat sound*: Two signals close

interfere with each other, creating

high-pitched sound. This sound

not only by sound signals bu

waves as well.

Factors due to vehicle noise: G

may be a cause.

54-56



56/70

1 A-4 Broadcasts can be heard but both AM and FM have a lot of noise.

(1)

Noise occurs when the engine is stopped.

(2)

Noise occurs when the engine in r

Do the followmg measures eliminate the noise?

Tune to a station with a strong signal.

Extend the antenna completely.

inspect the vehicles noise suppress

Adjust the sound quality to suppress high tones.

Is the radio body ground mounted securely?

1 No

b Securely trghten the nuts for the body

Yes

ground.

I/

No

s the antenna plug properly connected to the radro?

)I

Yes

1

orrectly attach the

Is the antenna

mounted?

itself

in good condrtron

or is it properly

Yes

/ , /

INo

t-+jOK

s the noise eliminated?

i

r

li

HASSIS ELECTRICAL - Radio and Tape Player


57/70

A-5 There is more noise either on AM or on FM.

1. There is much noise only on AM

Due to differences in AM and FM systems,

is more susceptible to noise interference.

AM

Were conditions such as the following present when noise

was recerved?

Lightnrng was flashing. A motorcycle was passing.

A vehicle passed close by, but it appeared to be a

Yes

I

vehicle generating a particularly large amount of norse

radiation.

Passed beneath a power l ine. Passed under a bridge

Passed beneath a telephone line.

Passed close bv a sianal aenerator

Passed close by someothe; source of electrical now

i

No

Yes

for the conditions lrsted above.

2.

other radios, consult a service center.

There is much noise only on FM

Due to differences in FM and AM systems,

tion generated by typical noise inte

fading and multipath). (Refer to

(hissing) occurs in weak signal

54-58



58/70

A-6 There is noise when starting the engine.

Noise

type

Sounds are in

parentheses

( ).

AM, FM:

Ignition noise

(Popping,

snapping,

cracking,

buzzing)

Other electrical

components

Static electricity

(Cracking,

crinkling)

Conditions

0

Increasing the engine speed

causing the popping sound to

speed up, and volume

decreases.

0

Disappears when the ignition

switch is turned to ACC.

0

Disappears when the vehicle

is completely stopped.

Severe when transmission is

engaged and vehicle is moving.

Various noises are produced

Cause

0

Mainly due to the spark

plug circuit.

0

Due to engine noise.

Noise may appear as

electrical components

become older.

Occurs when parts or wiring

move for some reason and -

contact metal parts of the

body.

Due to detachment from the

Remedy

0 Use eng

to diagn

system.

Check

ground

Fig. 1.)

Check

noise ca

Repair or re

components.

Return parts

their proper

Tighten the


59/70


1 A-7

Some noise appears when there is vibration or shocks during travelling.

Are connectors properly connected?

the earth, causing a buzzing noise. Since no

taken on the radio side, other steps should be

1

he static electr icity of the vehicle body. (e.g. g

Is the radio correctly grounded? (Is the mounting screw tightened

i -

Tighten the screw securely.

securely?)

Yes

Is the antenna correctly grounded? (If noise appears when the

antennais moved, this means theground is not securely connected.)

Yes

If rust

IS

present at the antenna ground screw

the ground securely.

Repair or replace radio.

1

A-8 Noise sometimes appears on FM during travelling.


60/70

54 60


1 A-9 Ever-present noise.

Noise is often created by the following factors, and

often the radio is OK when it is checked individually.

Traveling conditions of the vehicle

Terrain of area traveled through

Surrounding buildings

Signal conditions

Time period

B. RADIO

For this reason, if there are still prob

even after the measures described

to A-8 have been taken, get info

factors listed above as well as deter

the problem occurs with AM or

names, frequencies, etc., and co

center.

1 B-i No power is supplied when the switch is set to ON.

Replace fuse or repair harness.

Is the connector at the

back of the radio connected properly?

Connect connector securely.

\

Disconnect and check the connector at the rear of the radio. Is

the ACC power (12 V) being supplied to the radio?

Repair harness.

1

es


61/70

B-3 There is noise but no reception for both AM and FM or no sound from AM, or no soun

I-r:

Yes

Is the check being conducted under

special electrical field conditions?

No

Example: In an underground

garage or inside a building.

1

:

Yes

Is proper performance obtained when

- OK

the vehicle is moved?

No

f

Does tuning solve the problem?

i /

Yes

,-* OK

f

No

Are the antenna plug and ra

Yes

Does the problem drsappear if another radio is tested?

No


Replace the antenna.

54-62



62/70

1 B-5 Distortion on AM or on both AM and FM.

How much distortion is there?

IConstant

Occasional

- Distortion in the vicintty of the radio

station

Excessive antenna

I

No

t

Are the speaker cords In contact with the cone paper?

4

No

Remove the speakers. Do the speakers have torn cone paper

or foreign objects?

No

Remove cords away from cone paper.

Repair or replace speakers.

( Is he speaker deformed when Installed?

No

Install speaker securely.


B-6 Distortion on FM only

No

Doesthedistortionpersistwhenthe radiois tunedto anotherstation? Due to weak signal radio station

1 es

f

b distortron increase or decrease when the vehrcle is moved?

Yes

Due to multipath noise



63/70

Fdedicated fuse No. 2 blown or is the circurt open?

No

Yes

- Replace fuse or repair harness,

No

Disconnect and check the connector at the rear of the radio. h Repair

harness

Is

the memory backup (battery) power being supplred? Terminal

No. 10.

Yes

Reparr or replace radio.

C. TAPE PLAYER

C-l Cassette tape is not accepted.

.

re there any foreign objects in the tape player?

r:_j ;ovethe object(s)*l

AttemptIng to force a foreign object (e.g., a co

of the tape player may damage the mechanism.

be taken to a servrce dealer for reparr.

Does the tape player work if another tape is inserted?

I No

t--l Replace tapeQ

*2

54-64



64/70

C-4 Sound quality is poor, or sound is weak.

1

OK

No

*.

Ensure that the tape label is not loose, that the tape

itself is not deformed and that the tape is tightly wound.

Tapes of C-120 or greater length often get caught in

the mechanism and should not be used.

Does the player play properly when the tape player head is cleaned?

1No

OK

Is proper operatron obtained when the tape player is replaced?

No

Repair or replace

Repair or replace speaker.

C-5 Cassette tape will not be ejected.

\

The problems covered here are all the result of

the use of a bad tape (deformed or not properly

tightened) or of a malfunction of the tape player

also possible, and attempting to for

of the player can cause damage to t

The player should be taken to a



65/70

C-7 Faulty auto reverse.

Does the player play OK if the tape* is changed?

I

No

*.

OK

Ensure that the tape label is not loose, that the tape

itself is not deformed and that the tape IS tightly wound.

Tapes of C-120 or greater length often get caught In

the mechanrsm and should not be used.

c

f

Does the problem only occur while the vehicle IS being driven?

Repair or replace

L

Yes

Is the tape player properly installed to the vehicle?

Ensure tape player

B

t

Repair or replace tape player.

C-8 Tape gets caught in mechanism*.

54-66

CHASSIS ELECTRICAL - Speaker


66/70

SPEAKER


CHASSIS ELECTRICAL - Antenna

.


67/70

ANTENNA


54-68

CHASSIS ELECTRICAL - Antenna/Rear Window Defogger


68/70

T0533AA

2. Pull out the antenna base until the end of

can be seen.

3. Pass the cord through the hole in the en

pipe and wrap it with vinyl tape.

Caution

Wrap it securely so that the cord will

4.

Slowly pull out the antenna base little by l

it.

REAR WINDOW DEFOG

ON-VEHICLE SERVICE

PRINTED-HEATER LINE CHECK

Run engine at 2,000 r/min. Check heater

battery fully charged.

Turn ON rear window defogger switch. M

element voltage with circuit tester at rear


69/70

54-70 CHASSIS ELECTRICAL - Rear Window Defogger


70/70

2 2 2

REAR WINDOW DEFOGGER RELAY CONTIN

Battery voltage

Power is not supplied

Power is supplied

Terminal No.

1 2

0

0

0

Documents

54 Chassis Electrical