
12 CHECK ECM POWER SUPPLY CIRCUIT-IV
1. Disconnect ECM relay. (For ECM relay location, refer to ªEngine Control Compartment Parts Locationº.)
2. Check voltage between ECM relay terminal 3 and ground with CONSULT-II or tester.
SEF295X
Or, ECM relay is locating on relay box in engine compartment.
OK or NG
OK©GO TO 14.
NG©GO TO 13.
13 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E76, F36
+Harness connectors M72, F44 (where fitted)
+Harness connectors M11, E106 (LHD models) (where fitted)
+Harness connectors M78, E120 (RHD models) (where fitted)
+Joint connector F46 (where fitted)
+Harness for open or short between ECM relay and 10A fuse
©Repair open circuit or short to ground or short to power in harness or connectors.
14 CHECK HARNESS CONTINUITY BETWEEN ECM RELAY AND ECM FOR OPEN AND SHORT
1. Check harness continuity between ECM terminals 110, 112 and ECM relay terminal 5.
Refer to WIRING DIAGRAM.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 16.
NG©GO TO 15.
15 DETECT MALFUNCTIONING PART
Check the following.
+Joint connector-3
+Harness connector E76, F36 (where fitted)
+Joint connector F46 (where fitted)
+Harness for open or short between ECM and ECM relay
©Repair open circuit or short to ground or short to power in harness or connectors.
TROUBLE DIAGNOSIS FOR POWER SUPPLYQG18DE
Main Power Supply and Ground Circuit (Cont'd)
EC-152 

ELECTRICAL SYSTEM
SECTION
EL
CONTENTS
PRECAUTIONS...............................................................4
Supplemental Restraint System (SRS)²AIR
BAG²and²SEAT BELT PRE-TENSIONER²...............4
Wiring Diagrams and Trouble Diagnosis .....................4
HARNESS CONNECTOR................................................5
Description ...................................................................5
STANDARDIZED RELAY................................................7
Description ...................................................................7
POWER SUPPLY ROUTING...........................................9
Schematic ..................................................................10
Wiring Diagram - POWER - (Models with fuse
and fusible link box E43) ...........................................14
Wiring Diagram - POWER - (Models with fuse
and fusible link box E90) ...........................................24
Inspection...................................................................32
GROUND........................................................................33
Ground Distribution (Models with fuse and fusible
link box E43) ..............................................................33
Ground Distribution (Models with fuse and fusible
link box E90) ..............................................................48
COMBINATION SWITCH..............................................64
Check .........................................................................64
Replacement ..............................................................66
STEERING SWITCH......................................................67
Check .........................................................................67
HEADLAMP...................................................................69
Wiring Diagram - H/LAMP -.......................................69
Trouble Diagnoses.....................................................71
Bulb Replacement .....................................................71
Aiming Adjustment .....................................................72
HEADLAMP - DAYTIME LIGHT SYSTEM -.................73
System Description ....................................................73
Schematic ..................................................................74
Wiring Diagram - DTRL - ...........................................75
Trouble Diagnoses.....................................................81
Bulb Replacement .....................................................81
Aiming Adjustment .....................................................82
HEADLAMP - HEADLAMP AIMING CONTROL -........83
Wiring Diagram - H/AIM - ..........................................83PARKING, LICENSE AND TAIL LAMPS.....................87
Wiring Diagram - TAIL/L - ..........................................87
STOP LAMP..................................................................91
Wiring Diagram - STOP/L - .......................................91
BACK-UP LAMP............................................................93
Wiring Diagram - BACK/L - .......................................93
FRONT FOG LAMP.......................................................95
Wiring Diagram - F/FOG - .........................................95
Bulb Replacement .....................................................97
Aiming Adjustment .....................................................98
REAR FOG LAMP.........................................................99
Wiring Diagram - R/FOG -.........................................99
TURN SIGNAL AND HAZARD WARNING LAMPS...101
System Description ..................................................101
Wiring Diagram - TURN - ........................................102
Trouble Diagnoses...................................................106
ILLUMINATION............................................................107
Schematic ................................................................107
Wiring Diagram - ILL - .............................................109
INTERIOR ROOM LAMP............................................. 116
System Description .................................................. 116
Wiring Diagram - ROOM/L - .................................... 118
Trouble Diagnoses...................................................122
VANITY MIRROR AND LUGGAGE ROOM LAMPS..129
Wiring Diagram - INT/L - .........................................129
METERS AND GAUGES.............................................130
Component Parts and Harness Connector
Location ...................................................................130
System Description ..................................................130
Combination Meter ..................................................132
Schematic ................................................................134
Construction .............................................................136
Wiring Diagram - METER - .....................................137
Combination Meter Self-Diagnosis ..........................141
Trouble Diagnoses...................................................144
Electrical Components Inspection ...........................153
WARNING LAMPS......................................................155
Schematic ................................................................155
Wiring Diagram - WARN - .......................................156 

Component Parts and Harness Connector
Location
NLEL0452For details, refer to ªELECTRICAL UNIT LOCATIONº (EL-442) and ªHARNESS LAYOUTº (EL-452).
System DescriptionNLEL0453The warning chime is controlled by the time control unit.
The warning chime is located in the time control unit.
Power is supplied at all times
+through 15A fuse [No. 5, located in fuse block (J/B)]
+to time control unit terminal 9.
+through 10A fuse [No. 12, located in the fuse block (J/B)]
+to key switch terminal 1.
+through 10A fuse (No. 38, located in the fuse and fusible link box)
+to lighting switch terminal 11.
With the ignition switch in the ON or START position, power is supplied
+through 10A fuse [No. 10, located in the fuse block (J/B)]
+to time control unit terminal 1.
Ground is supplied to time control unit terminal 16 through body grounds M28 and M48.
When a signal, or combination of signals, is received by the time control unit, the warning chime will sound.
IGNITION KEY WARNING CHIMENLEL0453S01With the key in the ignition switch in the OFF position, the driver's door open and driver's door locked, the
warning chime will sound. Power is supplied
+from key switch terminal 2
+to time control unit terminal 22.
Ground is supplied
+from body grounds B24 and B30
+through front door switch (driver side) terminals 3 and 2
+to time control unit terminal 6, and
Ground is interrupted,
+from body grounds M28 and M48
+to time control unit terminal 35
LIGHT WARNING CHIMENLEL0453S02With ignition switch OFF, driver's door open, and lighting switch in 1ST or 2ND position, warning chime will
sound. Power is supplied.
+from lighting switch terminal 12
+to time control unit terminal 10
Ground is supplied
+from front door switch (driver side) terminal 2
+to time control unit terminal 6.
Front door switch (driver side) terminal 3 is grounded through body grounds B24 and B30.
TRAILER DIRECTION INDICATOR WARNING CHIMENLEL0453S04This warning chime will be sounded while the direction indicator (turn signal lamp) is in operation with towing
the trailer.
This is an audible feedback (warning chime) to the driver.
If no audible feedback is heard while towing the trailer and operating the turn signal, this indicates the bulb
failure of the trailer.
Time control unit will detect the additional electrical load of a turn signal lamp for trailer automatically. Then
the chime will be sounded by the time control unit internally with the operation of the turn signal.
WARNING CHIME
Component Parts and Harness Connector Location
EL-165