Post on 02-Jun-2018
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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
.............
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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
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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
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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)
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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.
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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.
INSPECTION PROCEDURE 2
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
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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
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E
HASSIS ELECTRICAL - Ignition Switch
INSPECTION PROCEDURE 5
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
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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
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CHASSIS ELECTRICAL - Ignition Switch
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.
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54- 12
CHASSIS ELECTRICAL - Ignition Switch
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
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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
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54- 14
CHASSIS ELECTRICAL - Combination Meters
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
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*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
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a
54-16
CHASSIS ELECTRICAL -
Combination Meters
Inspection Procedure 2
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
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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
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54- 18
CHASSIS ELECTRICAL - Combination Meters
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.
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CHASSIS ELECTRICAL - Combination Meters
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
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54 20
CHASSIS ELECTRICAL -
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.
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HASSIS ELECTRICAL - Combination Meters
COMBINATION METERS
REMOVAL AND INSTALLATION
b
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54-22
CHASSIS ELECTRICAL - Combination Meters
(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
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HASSIS ELECTRICAL - Combination Meter
DISASSEMBLY AND REASSEMBLY
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54-24
CHASSIS ELECTRICAL -
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
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E
CHASSIS ELECTRICAL - Headlight and Turn-signal Light
SERVICE SPECIFICATIONS
Items
Headlight intensity
Limit
20,000 cd or more
SPECIAL TOOLS
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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
Check the hazard warning
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
Check the hazard warning
contact (hazard-warning lig
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CHASSIS ELECTRICAL - Headlight and Turn-signal Light
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
Inspection Procedure 1
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.
Inspection Procedure 2
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.
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CHASSIS ELECTRICAL - Headlight and Turn-signal Light
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.
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54-30 CHASSIS ELECTRICAL - Headlight and Turn-signal Light
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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.
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54-32
CHASSIS ELECTRICAL - Headlight and Turn-signal Light
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.
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CHASSIS ELECTRICAL - Headlight and Turn-signal Light
HEADLIGHT AND FRONT TURN-SIGNAL LIGHT
REMOVAL AND INSTALLATION
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54-34
CHASSIS ELECTRICAL -
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.
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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
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54-36
CHASSIS ELECTRICAL -
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
.
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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.
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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.
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FOG LIGHT
CHASSIS ELECTRICAL - Fog Light
REMOVAL AND INSTALLATION
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54-40
CHASSIS ELECTRICAL -
Fog Light/Rear Combination Light
relay
t\\
\ \ \
I
123
4
El
5
4
??4
3
0420001
00004798
FOG LIGHT RELAY CONTINUITY CHECK
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*
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
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54-42
CHASSIS ELECTRICAL -
Rear Combination Light
INSPECTION PROCEDURE 2
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
INSPECTION PROCEDURE 3
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
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HASSIS ELECTRICAL - Rear Combination Light
REAR COMBINATION LIGHT
REMOVAL AND INSTALLATION
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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
TROUBLESHOOTING HINTS
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.
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54-46
CHASSIS ELECTRICAL - Interior Liaht
INTERIOR LIGHT
REMOVAL AND INSTALLATION
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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
-
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.
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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.
TROUBLESHOOTING HINTS
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
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54-50
CHASSIS ELECTRICAL -
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.
TROUBLESHOOTING HINTS
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
REMOVAL AND INSTALLATION
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54-52
CHASSIS ELECTRICAL - Radio and Tape Player
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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).
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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.
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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.
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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
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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
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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
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HASSIS ELECTRICAL - Radio and Tape Player
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.
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CHASSIS ELECTRICAL - Radio and Tape Player
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
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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
Repair or replace radio.
Replace the antenna.
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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.
Repair or replace radio.
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
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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
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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
HASSIS ELECTRICAL - Radio and Tape Player
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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*.
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SPEAKER
REMOVAL AND INSTALLATION
CHASSIS ELECTRICAL - Antenna
.
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ANTENNA
REMOVAL AND INSTALLATION
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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
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2 2 2
REAR WINDOW DEFOGGER RELAY CONTIN
Battery voltage
Power is not supplied
Power is supplied
Terminal No.
1 2
0
0
0