
qAqB
ITurn ignition switch OFF.
Disconnect A/C relay harness connec-
tor.CHECK POWER SUPPLY
FOR A/C RELAY.
Disconnect A/C relay.
Do approx. 12 volts exist
between A/C relay harness
connector terminal No.
q
3and body ground?
NG
OK
Note
Check circuit continuity between A/C
relay harness connector terminal No.
q
5and compressor harness connector
terminal No. q
1.
If NG, check harness connectors.
H
CHECK POWER SUPPLY
CIRCUIT AND 10A FUSE AT
FUSE BLOCK.
(Refer to ªPOWER SUPPLY
ROUTINGº in EL section and
Wiring Diagram.)
I Turn ignition switch ON.
CHECK POWER SUPPLY FOR A/C
RELAY (Coil side).
Do approx. 12 volts exist between A/C
relay harness connector terminal No.
q
2and body ground?
H
ENG CHECK POWER SUPPLY
FOR A/C CONTROL PANEL.
Disconnect A/C control panel
harness connector.
Do approx. 12 volts exist
between A/C control panel
harness connector terminal
No.q
1and body ground?
NG
OKFqC
(Go to next page.)
CHECK POWER SUPPLY
CIRCUIT AND 10A FUSE AT
FUSE BLOCK.
(Refer to ªPOWER SUPPLY
ROUTINGº in EL section and
Wiring Diagram.)
Note:
If the result is NG after checking circuit continuity, repair harness or connec-
tor.
YHA417
YHA418
YHA419
YHA420
HH
H
H
H
H
TROUBLE DIAGNOSES
Diagnostic Procedure 2 (Cont'd)
HA-56
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qD
CHECK POWER SUPPLY FOR
THERMO-CONTROL AMP.
Disconnect thermo-control amp. connec-
tor.
Do approx. 12 volts exist between thermo-
control amp. harness connector terminal
No.q
1and body ground?
OK
ENG
CHECK POWER SUPPLY
CIRCUIT AND 10A FUSE
AT FUSE BLOCK.
(Refer to ªPOWER SUP-
PLY ROUTINGº in EL sec-
tion and Wiring Diagram.)
ITurn ignition switch OFF.
CHECK BODY GROUND CIRCUIT FOR
THERMO-CONTROL AMP.
Disconnect thermo-control amp. harness
connector.
Ensure A/C switch is in ON position.
Ensure fan switch is in ON position
(1 to 4).
Does continuity exist between thermo
control amp. harness connector terminal
No. q
3and body ground?
OK
ENG
Disconnect fan switch har-
ness connector.
Ensure A/C switch is in ON
position.
OK
Note
Check circuit continuity
between thermo-control
amp. harness connector
terminal No. q
3and fan
switch harness connector
terminal No. q
6.
NG
Replace thermo-control amp.
Check A/C switch (Refer to
Electrical Components
Inspection, HA-61.)
OK
H Repair harness or connec-
tors.Note
CHECK BODY GROUND CIRCUIT FOR
FAN SWITCH.
Does continuity exist between fan switch
harness connector terminal
No. q
1and body ground?
OK
CHECK FAN SWITCH.
(Refer to Electrical Components
Inspection, HA-61.)
NG
Replace fan switch.
Note:
If the result is NG after checking circuit continuity, repair harness or connec-
tor.
YHA406
YHA425
YHA426
YHA427
H
H
H
HH
H
H
H
TROUBLE DIAGNOSES
Diagnostic Procedure 2 (Cont'd)
HA-58
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Diagnostic Procedure 3
SYMPTOM: Intake door does not change.
CHECK OPERATION
Does intake door motor (recirculation sys-
tem) operate, correctly?
NG
EOKIntake door motor (recir-
culation system) is OK.
CHECK POWER SUPPLY A/C CONTROL
PANEL
Disconnect A/C control panel harness con-
nector.
Do approx. 12 volts exist between A/C panel
harness connector terminal q
1and body
ground?
OK
ENG CHECK POWER SUP-
PLY CIRCUIT AND 10A
FUSE.
(Refer to ªPOWER
SUPPLY ROUTINGº in
EL section and Wiring
Diagram).
CHECK POWER SUPPLY FOR INTAKE
DOOR MOTOR
ITurn ignition switch ON.
Check voltage between intake door motor
terminal q
1and ground, a few seconds after
air recirculation switch is switched ON.
Do approx. 12 volts exist?
Check voltage between intake door motor
terminal q
2and ground, a few seconds after
air recirculation switch is switched OFF.
Do approx. 12 volts exist?
OK
ENG Check continuity
between intake door
motor terminal q
1(q2)
and A/C control panel
terminal q
10(q11).
If NG, repair harness or
connector.
OK
Replace A/C control
panel.
CHECK INTAKE DOOR MOTOR
Apply approx. 12 volts between intake door
motor terminals q
1(q2) and q2(q1).
Does intake door motor operate, correctly?
OK
ENG Replace intake door
motor.
CHECK INTAKE DOOR LINKAGE
(Refer to ªControl Linkage Adjustment,
HA-64.)
If OK, intake door is OK.ENGRepair intake door link-
age.
YHA429
YHA430
YHA431
YHA432
H
H
H
H
H
TROUBLE DIAGNOSES
HA-60
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System Description
M/T MODELS
Power is supplied at all times
Ithrough 40A fusible link (letter C, located in the fuse and fusible link box)
I to ignition switch terminal 1.
With the ignition switch in START position, power is supplied
I from ignition switch terminal 4
I to starter motor harness connector terminal 1.
The starter motor plunger closes and provides a closed circuit between the battery and starter motor. The
starter motor is grounded to the engine block. With power and ground supplied, cranking occurs and the engine
starts.
A/T MODELS
Power is supplied at all times
I through 40A fusible link (letter C, located in the fuse and fusible link box)
I to ignition switch terminal 1.
With the ignition switch in the START position, power is supplied
I from ignition switch terminal 4
I to park/neutral position relay terminal 5.
With the ignition switch ON or START position, power is supplied
I through 10A fuse [No. 8, located in the fuse block (J/B)]
I to park/neutral position (PNP) switch terminal 1.
With the selector lever in the P or N position, ground is supplied
I to park/neutral position switch terminal 2 through the park/neutral position relay terminals 2 and 1
I from body grounds M754 and M33.
Then park/neutral position relay is energized and power is supplied
I from park/neutral position relay terminal 3
I to starter motor harness connector terminal 1.
The starter motor plunger closes and provides a closed circuit between the battery and starter motor. The
starter motor is grounded to the engine block. With power and ground supplied, cranking occurs and the engine
starts.
STARTING SYSTEM
SC-13
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System Description
The alternator provides DC voltage to operate the vehicle's electrical system and to keep the battery charged.
The voltage output is controlled by the IC regulator.
Power is supplied at all times to alternator terminal 4 (S) (ZD30DDTi engine models) through:
I10A fuse (No. 31, located in the fuse and fusible link box).
Terminal B supplies power to charge the battery and operate the vehicle's electrical system. Output voltage
is controlled by the IC regulator at terminal 4 (S) detecting the input voltage (ZD30DDTi engine models). The
charging circuit is protected by the 100A fusible link.
The alternator is grounded to the engine block.
With the ignition switch in the ON or START position, power is supplied
I through 10A fuse [No. 12, located in the fuse block (J/B)]
I to combination meter terminal 28 for the charge warning lamp.
Ground is supplied to terminal 2 of the combination meter through terminal 1(L) (TD27Ti engine models) or
3(L) (ZD30DDTi engine models) of the alternator. With power and ground supplied, the charge warning lamp
will illuminate. When the alternator is providing sufficient voltage with the engine running, the ground is opened
and the charge warning lamp will go off.
If the charge warning lamp illuminates with the engine running, a malfunction is indicated.
CHARGING SYSTEM
SC-23
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ELECTRICAL SYSTEMSECTION
EL
When you read wiring diagrams:
I Read GI section, ªHOW TO READ WIRING DIAGRAMSº.
CONTENTS
PRECAUTIONS ...............................................................4
Supplemental Restraint System (SRS) ²AIR
BAG² and²SEAT BELT PRE-TENSIONER² ...............4
Wiring Diagrams and Trouble Diagnoses....................4
HARNESS CONNECTOR ................................................5
Description ...................................................................5
STANDARDIZED RELAYS ..............................................6
Description ...................................................................6
POWER SUPPLY ROUTING ...........................................8
Schematic ....................................................................8
Wiring Diagram - POWER - ......................................10
Fuse ........................................................................\
...19
Fusible Link................................................................19
Circuit Breaker Inspection .........................................19
GROUND DISTRIBUTION .............................................20
COMBINATION SWITCH ...............................................25
Check ........................................................................\
.25
Replacement ..............................................................26
STEERING SWITCH ......................................................27
Check ........................................................................\
.27
HEADLAMP - Without Daytime Light System - .........28
Wiring Diagram - H/LAMP -.......................................28
Trouble Diagnoses.....................................................31
HEADLAMP - Daytime Light System - .......................32
Operation ...................................................................32
System Description ....................................................32
Schematic ..................................................................33
Wiring Diagram - DTRL - ...........................................34
Trouble Diagnoses.....................................................40
HEADLAMP - Headlamp Aiming Control - .................41
Description .................................................................41
Replacing Headlamp Aiming Actuator .......................42
Wiring Diagram - H/AIM - ..........................................43
Trouble Diagnoses.....................................................46 HEADLAMP
...................................................................47
Bulb Replacement .....................................................47
Aiming Adjustment .....................................................47
EXTERIOR LAMP ..........................................................49
Wiring Diagram - TAIL/L - ..........................................49
Wiring Diagram - STOP/L - .......................................52
Wiring Diagram - BACK/L - .......................................53
Wiring Diagram - F/FOG - .........................................55
Front Fog Lamp Aiming Adjustment ..........................57
Wiring Diagram - R/FOG -.........................................58
System Description ....................................................59
Schematic ..................................................................61
Wiring Diagram - TURN - ..........................................62
Trouble Diagnoses.....................................................66
INTERIOR LAMP ...........................................................67
Schematic ..................................................................67
Wiring Diagram - ILL - ...............................................68
System Description ....................................................72
Wiring Diagram - INT/L - ...........................................74
Trouble Diagnoses.....................................................78
METER AND GAUGES .................................................82
System Description ....................................................82
Combination Meter ....................................................84
Schematic ..................................................................85
Wiring Diagram - METER - .......................................86
Combination Meter Self-Diagnosis ............................90
Trouble Diagnoses.....................................................92
Components Inspection .............................................97
Fuel Level Sensor Unit Check...................................98
Thermal Transmitter Check .......................................98
WARNING LAMPS AND CHIME ...................................99
Schematic ..................................................................99
Wiring Diagram - WARN - .......................................100
Electrical Components Inspection ........................... 110
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Fuse
a. If fuse is blown, be sure to eliminate cause of problem beforeinstalling new fuse.
b. Use fuse of specified rating. Never use fuse of more than speci- fied rating.
c. Do not install fuse in oblique direction; always insert it into fuse holder properly.
d. Remove fuse for clock if vehicle is not used for a long period of time.
Fusible Link
A melted fusible link can be detected by visual inspection. If its
condition is questionable, use circuit tester or test lamp.
CAUTION:
IIf fusible link should melt, it is possible that critical circuit
(power supply or large current carrying circuit) is shorted.
In such a case, carefully check and eliminate cause of
problem.
I Never wrap periphery of fusible link with vinyl tape.
Extreme care should be taken with this link to ensure that
it does not come into contact with any other wiring har-
ness or vinyl or rubber parts.
Circuit Breaker Inspection
For example, when current is 30A, the circuit is broken within 8 to
20 seconds.
CIRCUIT BREAKER (PTC THERMISTOR TYPE)
The PTC thermistor generates heat in response to current flow. The
temperature (and resistance) of the thermistor element varies with
current flow. Excessive current flow will cause the element's tem-
perature to rise. When the temperature reaches a specified level,
the electrical resistance will rise sharply to control the circuit cur-
rent.
Reduced current flow will cause the element to cool. Resistance
falls accordingly and normal circuit current flow is allowed to
resume.
SEL954J
YEL601D
SBF284E
SEL109W
POWER SUPPLY ROUTING
EL-19
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EFC HARNESS LHD MODELS
GROUNDCONNECT TO CONN.
NO. CELL CODE
F129/F128 4WD SWITCH (TD27Ti) E150 EL-WARN
BRAKE SWITCH F101 EC-BRK/SW
DATA LINK CONNECTOR F115 EC-MIL/DL
ECM F134EC-MAIN, EC-VSS, EC-BRK/SW,
EC-MIL/DL
NATS IMMU (TD27Ti) F58 EL-NATS
VEHICLE SPEED SENSOR E140 EC-VSS, EL-METER
F47/F36 AIR BAG DIAGNOSIS SENSOR UNIT B106 RS-SRS
BRAKE FLUID LEVEL SWITCH F3 EL-WARN
COMBINATION METER F118EC-VSS, AT-VSSMTR, EL-H/LAMP,
EL-DTRL, EL-F/FOG, EL-R/FOG,
EL-ILL, EL-TURN, EL-METER,
EL-WARN, EL-CLOCK, BR-ABS,
RS-SRS
COOLING FAN MOTOR F40 EC-COOL/F
DATA LINK CONNECTOR F115 EC-MIL/DL, AT-NONDTC
FRONT FOG LAMP LH F44 EL-F/FOG
FRONT TURN SIGNAL LAMP LH F37 EL-TURN, EL-THEFT
FUSE BLOCK (J/B) F114EL-F/FOG, EL-INT/L, EL-TURN,
EL-CHIME, EL-DEF, EL-SROOF,
EL-WINDOW, EL-D/LOCK, EL-S/
LOCK, EL-MULTI, EL-THEFT,
HA-A/C, M, HA-HEATER
HAZARD SWITCH (TYPE 1) F140 EL-TURN, EL-ILL
HAZARD SWITCH (TYPE 2) F152 EL-TURN, EL-ILL
HEADLAMP AIMING MOTOR LH F43 EL-H/AIM
HEADLAMP CLEANER MOTOR F103 EL-HLC
HEADLAMP LH F42 EL-H/LAMP, EL-DTRL
PARKING LAMP LH F41 EL-TAIL/L
SIDE TURN SIGNAL LAMP LH F104 EL-TURN, EL-THEFT
F53 AUDIO UNIT (TYPE 1) F139 EL-ILL, EL-AUDIO
AUDIO UNIT (TYPE 2) F153 EL-ILL, EL-AUDIO, EL-REMOTE
CD AUDIO CHANGER F155 EL-AUDIO
F2 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) F29 BR-ABS
EFC HARNESS RHD MODELS
GROUND CONNECT TO CONN.
NO. CELL CODE
F47/F36 FRONT FOG LAMP LH F44 EL-F/FOG
FRONT TURN SIGNAL LAMP LH F37 EL-TURN, EL-THEFT
HEADLAMP AIMING MOTOR LH F43 EL-H/AIM
HEADLAMP CLEANER MOTOR F103 EL-HLC
HEADLAMP LH F42 EL-H/LAMP
PARKING LAMP LH F41 EL-TAIL/L
SIDE TURN SIGNAL LAMP LH F104 EL-TURN, EL-THEFT
FUEL FILTER SWITCH F141 EL-WARN
F2 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) F29 BR-ABS
GROUND DISTRIBUTION
EL-20
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