1998 ISUZU TROOPER rear door

CAUTION
When fasteners are removed, always
reinstall them at the same location from
which they were removed. If a fastener
needs to be replaced, use the correct part
number fastener for that application. If the
correct part number fastener is not available,
a fastener of equal size and strength (or
stronger) may be used. Fasteners that are not reused, and those
requiring thread locking compound, will be
called out. The correct torque values must
be used when installing fasteners that
require it. If the above conditions are not
followed, parts or system damage could
result.
HEATING AND VENTILATION 1A Ð 1
SECTION 1A
HEATING AND VENTILATION
CONTENTS
PAGE
General Description.....................................................1AÐ 2
Heater...............................................................1AÐ 2
Control Lever Assembly................................................1AÐ 3
Ventilation...........................................................1AÐ 3
Air Select Knob.......................................................1AÐ 4
Air Source Select Lever................................................1AÐ 4
Fan Control Knob.....................................................1AÐ 4
Temperature Control Knob.............................................1AÐ 4
Ceramic Heater.......................................................1AÐ 5
On-Vehicle Service......................................................1AÐ 6
Heater Unit..........................................................1AÐ 6
Heater Core and/or Mode Door..........................................1AÐ 8
Heater Mode Control Link Unit..........................................1AÐ10
Heater Temperature Control Link Unit....................................1AÐ12
Blower Assembly.....................................................1AÐ14
Blower Link Unit and/or Mode Door......................................1AÐ16
Blower Motor........................................................1AÐ18
Rear Heater Duct, Defroster Nozzle and Ventilation Duct....................1AÐ20
Center and/or Side Vent...............................................1AÐ22
Control Lever Assembly and/or Control Cables............................1AÐ24
Control Panel Illumination Bulb..........................................1AÐ27
Resistor.............................................................1AÐ28
Ceramic Heater and/or Full Hot Switch...................................1AÐ30

When the engine warming up, the warmed engine
coolant is sent out into the heater core. The heater
system supplies warm air into the passenger
compartment to warm it up.
Outside air is circulated through the heater core of
the heater unit and then back into the passenger
compartment. By controlling the mixture of outside
air and heater core air, the most comfortable
passenger compartment temperature can be
selected and maintained.
The temperature of warm air sent to the passenger
compartment is controlled by the temperature
control knob. This knob acts to open and close the
air mix door, thus controlling the amount of air
passed through the heater core.The air select knob, with its different modes, also
allows you to select and maintain the most
comfortable passenger compartment temperature.
The air source select lever is used to select either
ÒFRESHÓ for the introduction of the outside air, or
ÒCIRCÓ for the circulation of the inside air. When
the lever is set to ÒFRESHÓ, the outside air is always
taken into the passenger compartment. When
setting the lever to ÒCIRCÓ position, the circulation
of air is restricted only to the inside air with no
introduction of the outside air and the air in the
passenger compartment gets warm quickened.
However, the lever is normally set to ÒFRESHÓ to
prevent the windshield from clouding.
1A Ð 2 HEATING AND VENTILATION
GENERAL DESCRIPTION
HEATER
Side def hose
Vent box
Upper center vent duct
Lower center
vent ductBlower assembly
Control lever assembly Evaporator
assembly W/A/C
W/O A/C
Duct Heater unit
Lap vent nozzle Vent box Side def hoseDefroster nozzle
Rear heater duct
A/C - Air Conditioning This illustration is based on LHD

COMPRESSOR OVERHAUL 1D Ð 25
1. Perform oil return operation.
2. Discharge and recover the refrigerant and remove
the compressor.
3. Drain the compressor oil and measure the extracted
oil.
4. Check the compressor oil for contamination.
5. Adjust the oil level as required.
6. Evacuate, charge and perform the oil return
operation.
7. Check the system operation.
Contamination of Compressor Oil
Unlike engine oil, no cleaning agent is added to the
compressor oil. Even if the compressor runs for a long
period of time (approximately one season), the oil never
becomes contaminated as long as there is nothing
wrong with the compressor or its method of use.
Inspect the extracted oil for any of the following
conditions:
·The capacity of the oil has increased.
·The oil has changed to red.
·Foreign substances, metal powder, etc., are present
in the oil.
If any of these conditions exists, the compressor
oil is contaminated. Whenever contaminated
compressor oil is discovered, the receiver/drier
must be replaced.
Oil Return Operation
There is close affinity between the oil and the
refrigerant. During normal operation, part of the oil
recirculates with the refrigerant in the system. When
checking the amount of oil in the system, or replacing
any component of the system, the compressor must be
run in advance for oil return operation. The procedure
is as follows:
1. Open all the doors and the engine hood.
2. Start the engine and air conditioning switch to "ON"
and set the fan control knob at its highest position.
3. Run the compressor for more than 20 minutes
between 800 and 1,000 rpm in order to operate the
system.
4. Stop the engine.
Replacement of Component Parts
When replacing the system component parts, supply
the following amount of oil to the component parts to be
installed.
Compressor Leak Testing (External and
Internal)
Bench-Check Procedure
1. Install test plate J-39893 on rear head of compressor.
2. Using Refrigerant Recovery System, attach center
hose of manifold gage set on charging station to a
refrigerant drum standing in an upright drum.
3. Connect charging station high and low pressure
lines to corresponding fittings on test plate J-39893.
Suction port (low-side) of compressor has large
internal opening. Discharge port (high-side) has
smaller internal opening into compressor and
deeper recess.
4. Open low pressure control, high pressure control
and refrigerant control on charging station to allow
refrigerant vapor to flow into compressor.
5. Using a leak detector, check for leaks at pressure
relief valve, rear head switch location, compressor
front and rear head seals, center cylinder seal,
through bolt head gaskets and compressor shaft
seal. After checking, shut off low pressure control
and high-pressure control on charging station.
6. If an external leak is present, perform the necessary
corrective measures and recheck for leaks to make
certain the leak has been connected.
7. Recover the refrigerant.
8. Disconnect both hoses from the test plate J-39893.
9. Add 90 ml (3 oz.) new PAG lubricant to the
compressor assembly. Rotate the complete
compressor assembly (not the crankshaft or drive
plate hub) slowly several turns to distribute oil to all
cylinder and piston areas.
10. Install a M9 ´1.25 threaded nut on the compressor
crankshaft if the drive plate and clutch assembly are
not installed.
11. Using a box-end wrench or socket and handle,
rotate the compressor crankshaft or clutch drive
plate on the crankshaft several turns to insure
piston assembly to cylinder wall lubrication.
12. Using Refrigerant Recovery System, connect the
charging station high-pressure line to the test plate
J-39893 high-side connector.
13. Using Refrigerant Recovery System, connect the
charging station low-pressure line to the low
pressure port of the test plate J-39893. Oil will drain
out of the compressor suction port if the compressor
is positioned with the suction port downward. (Component parts to be (Amount of Oil)
installed)
Evaporator 50 cc (1.7 fl. oz.)
Condenser 30 cc (1.0 fl. oz.)
Receiver/dryer 30 cc (1.0 fl. oz.)
Refrigerant line (one 10 cc (0.3 fl. oz.)
piece)
(Amount of oil drained (Charging amount of oil
from used compressor) to new compressor)
more than 90 cc same as drained amount
(3.0 fl.oz)
less than 90 cc (3.0 fl.oz) 90 cc (3.0 fl.oz)

8A–2LIGHTING SYSTEM
Vanity Mirror Illumination Bulb 8A–16 . . . . . . . . . . . . .
Removal 8A–16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–16 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starter Switch 8A–17 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–17 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lighting Switch (Combination Switch) 8A–18 . . . . . .
Removal 8A–18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–18 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fog Light Switch 8A–19 . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–19 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stoplight Switch (W/O Cruise Control) 8A–20 . . . . . .
Removal 8A–20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–20 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake Switch (W/Cruise Control) 8A–21 . . . . . . . . . .
Removal 8A–21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–21 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal Switch (Combination Switch) 8A–21 . . .
Removal and Installation 8A–21 . . . . . . . . . . . . . . .
Hazard Warning Switch 8A–22 . . . . . . . . . . . . . . . . . .
Removal 8A–22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation 8A–22 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Switch 8A–23 . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–23 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Switch 8A–23 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–23 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Defogger Switch 8A–24 . . . . . . . . . . . . . . . . . . .
Removal 8A–24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–24 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat Heater Switch 8A–25 . . . . . . . . . . . . . . . . . . . . . .
Removal 8A–25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–25 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Key Remind Switch (Starter Switch) 8A–25 . . . . . . .
Removal and Installation 8A–25 . . . . . . . . . . . . . . .
Illumination Controller 8A–26 . . . . . . . . . . . . . . . . . . . .
Removal 8A–26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–26 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power/Winter Switch 8A–27 . . . . . . . . . . . . . . . . . . . . .
Removal 8A–27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8A–27 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data and Specifications 8A–28 . . . . . . . . . . . . .
Service Precaution
WARNING: I F S O E Q U IPPED WITH A
SUPPLEMENTAL RESTRAINT SYSTEM (SRS),
REFER TO THE SRS COMPONENT AND WIRING
LOCATION VIEW IN ORDER TO DETERMINE
WHETHER YOU ARE PERFORMING SERVICE ON OR
NEAR THE SRS COMPONENTS OR THE SRS
WIRING. WHEN YOU ARE PERFORMING SERVICE
ON OR NEAR THE SRS COMPONENTS OR THE SRS
WIRING, REFER TO THE SRS SERVICE
INFORMATION. FAILURE TO FOLLOW WARNINGS
COULD RESULT IN POSSIBLE AIR BAG
DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.
CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts and
systems.

WIRING SYSTEM 8DÐ1
BODY AND ACCESSORIES
WIRING SYSTEM
CONTENTS
Service Precautions . . . . . . . . . . . . . . . . . . . 8DÐ3
General Description . . . . . . . . . . . . . . . . . . . 8DÐ4Notes for Working on Electrical Items . . 8DÐ4
Symbols and Abbreviations . . . . . . . . . . . 8DÐ10
Parts for Electrical Circuit . . . . . . . . . . . . . 8DÐ12
Reading the Circuit Diagram . . . . . . . . . . 8DÐ21
Main Data and Specifications . . . . . . . . . . . 8DÐ24 Fuse, Fusible Link and Circuit Breaker Location . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ24
Relay Location . . . . . . . . . . . . . . . . . . . . . . 8DÐ27
Diode Location . . . . . . . . . . . . . . . . . . . . . . 8DÐ30
Grounding Point . . . . . . . . . . . . . . . . . . . . . 8DÐ33
Cable Harness Routing . . . . . . . . . . . . . . . 8DÐ45
Fuse Block Circuit . . . . . . . . . . . . . . . . . . . . . 8DÐ53 Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ54
Start and Charging . . . . . . . . . . . . . . . . . . . . 8DÐ67 General Description . . . . . . . . . . . . . . . . . . 8DÐ67
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ68
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ70
Powertrain Control Module (PCM) . . . . . . . 8DÐ80 General Description . . . . . . . . . . . . . . . . . . 8DÐ80
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ81
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ93
QOSIII (4JG2) . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ111 General Description . . . . . . . . . . . . . . . . . . 8DÐ111
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ112
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ114
QOS and EGR System (4JG2) . . . . . . . . . . . 8DÐ118 General Description . . . . . . . . . . . . . . . . . . 8DÐ118
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ119
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ122
Headlight and Fog Light . . . . . . . . . . . . . . . . 8DÐ127 General Description . . . . . . . . . . . . . . . . . . 8DÐ127
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ128
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ130
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ134
Rear Foglight . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ150 Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ151
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ152
Headlight Leveling . . . . . . . . . . . . . . . . . . . . 8DÐ153 General Description . . . . . . . . . . . . . . . . . . 8DÐ153
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ154
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ155
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ156
Clearance Light, Taillight and License Plate Light . . . . . . . . . . . . . . . . . . . . 8DÐ159 General Description . . . . . . . . . . . . . . . . . . 8DÐ159
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ160
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ163
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ168
Interior Illumination Light . . . . . . . . . . . . . . 8DÐ180 General Description . . . . . . . . . . . . . . . . . . 8DÐ180
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ181
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ185
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ192
Turn Signal Light and Hazard Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ193
General Description . . . . . . . . . . . . . . . . . . 8DÐ193
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ194
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ197
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ202
Stoplight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ208 General Description . . . . . . . . . . . . . . . . . . 8DÐ208
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ209
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ212
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ216
Backup Light. . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ220 General Description . . . . . . . . . . . . . . . . . . 8DÐ220
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ221
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ223
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ227
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ230 General Description . . . . . . . . . . . . . . . . . . 8DÐ230
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ231
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ232
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ235
Dome Light, Luggage Room Light, Courtesy Light and Map Light . . . . . . . . . . 8DÐ237
General Description . . . . . . . . . . . . . . . . . . 8DÐ237
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ238
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ240
Power Door Lock . . . . . . . . . . . . . . . . . . . . . . 8DÐ244 General Description . . . . . . . . . . . . . . . . . . 8DÐ244
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ245
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ250
Diagnosi s. . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ2 56
Power Window . . . . . . . . . . . . . . . . . . . . . . . 8DÐ261 General Description . . . . . . . . . . . . . . . . . . 8DÐ261
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ262
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ263
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ266
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ272

8DÐ2 WIRING SYSTEM
General Description . . . . . . . . . . . . . . . . . . 8DÐ272
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ273
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ275
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ279
AntiÐLock Brake System (ABS) . . . . . . . . . . 8DÐ284
General Description . . . . . . . . . . . . . . . . . . 8DÐ284
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ285
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ291
A/T Shift Lock . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ298
General Description . . . . . . . . . . . . . . . . . . 8DÐ298
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ299
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ300
Windshield Wiper/Washer . . . . . . . . . . . . . . 8DÐ303
General Description . . . . . . . . . . . . . . . . . . 8DÐ303
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ304
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ305
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ308
Rear Wiper/Washer . . . . . . . . . . . . . . . . . . . . 8DÐ316
General Description . . . . . . . . . . . . . . . . . . 8DÐ316
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ317
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ319
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ323
Headlight Wiper/Washer . . . . . . . . . . . . . . . 8DÐ329
General Description . . . . . . . . . . . . . . . . . . 8DÐ329
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ330
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ332
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ336
Rear Defogger . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ342
General Description . . . . . . . . . . . . . . . . . . 8DÐ342
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ343
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ344
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ347
Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ350
General Description . . . . . . . . . . . . . . . . . . 8DÐ350
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ351
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ355
Cigarette Lighter and Digital Clock . . . . . . . 8DÐ359
General Description . . . . . . . . . . . . . . . . . . 8DÐ359
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ360
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ361
Power Door Mirror . . . . . . . . . . . . . . . . . . . . 8DÐ364
General Description . . . . . . . . . . . . . . . . . . 8DÐ364
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ365
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ368
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ373
AntiÐTheft System with Keyless Entry . . . . 8DÐ380
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ381
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ392
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ399Meter and Warning/Indicator Light . . . . . . 8DÐ410
General Description . . . . . . . . . . . . . . . . . . 8DÐ410
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ411
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ429
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ445
A/T Shift Indicator . . . . . . . . . . . . . . . . . . . . . 8DÐ464
General Description . . . . . . . . . . . . . . . . . . 8DÐ464
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ465
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ467
Heater and Air Conditioning . . . . . . . . . . . . 8DÐ471
General Description . . . . . . . . . . . . . . . . . . 8DÐ471
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ472
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ474
Sun Roof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ484
General Description . . . . . . . . . . . . . . . . . . 8DÐ484
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ485
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ486
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ489
Seat Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ493
General Description . . . . . . . . . . . . . . . . . . 8DÐ493
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ494
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ495
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ498
Power Seat . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ500
General Description . . . . . . . . . . . . . . . . . . 8DÐ500
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ501
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ503
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ507
Shift on the Fly System . . . . . . . . . . . . . . . . 8DÐ513
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ514
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ516
Torque on Demand (TOD) . . . . . . . . . . . . . . 8DÐ538
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ539
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ542
Supplemental Restraint System (SRS)Ð
AIR BAG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ543
General Description . . . . . . . . . . . . . . . . . . 8DÐ543
Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . 8DÐ544
Parts Location . . . . . . . . . . . . . . . . . . . . . . . 8DÐ548
Connector List . . . . . . . . . . . . . . . . . . . . . . . . 8DÐ550

8DÐ4 WIRING SYSTEM
The chassis electrical system is a 12Ðvolt system with a
negative ground polarity.
Wire size are appropriate to respective circuits, and
classified by color. (The classification of harnesses by
color is shown on the circuit diagram for ease of harness
identification.)
The wire size is determined by load capacity and the
length of wire required.
The vehicle harnesses are: body harness, chassis
harness, engine room harness, instrument harness,
transmission harness, engine ECGI harness, dome light
harness, door harness, rear body harness, tailgate
harness, SRS harness and battery cables.
The harnesses are protected either by tape or corrugated
tube, depending on harness location.
The circuit for each system consists of the power source,
wire, fuse, relay, switch, load parts and ground, all of
which are shown on the circuit diagram.
In this section, each electrical device is classified by
system.
For major parts shown on the circuit based on the circuit
diagram for each system, a summary, diagnosis of
troubles and inspection procedures are detailed.
Notes for Working on Electrical
Items
Disconnecting the Battery Cable
1. All switches should be in the ÒOFFÓ position.
2. Disconnect the battery ground cable (2).
3. Disconnect the battery positive cable (1).
CAUTION: It is important that the battery ground
cable be disconnected first. Disconnecting the
battery positive cable first can result in a short circuit.
Connecting the Battery Cable
Follow the disconnecting procedure in the reverse order.CAUTION: Clean the battery terminal and apply a
light coat of grease to prevent terminal corrosion.
Disconnecting the Connector
Some connectors have a tang lock to hold the connectors
together during vehicle operation.
Some tang locks are released by pulling them towards
you (1).
Other tang locks are released by pressing them forward
(2).
Determine which type of tang lock is on the connector
being handled.
Firmly grasp both sides (male and female) of the
connector (3).
Release the tang lock and carefully pull the two halves of
the connector apart.
Never pull on the wires to separate the connectors (4).
2
1
General Description
1
2
3
4

8DÐ34 WIRING SYSTEM
Connector No. Cable harness Location Parts (Load)
C-39
Windshield washer motor1
C-39
Windshield wiper motor2
C-39
FRT fog light relay4
C-39Meter, Vehicle speed sensor (Meter),
Fuel tank unit 6
Engine room
harnessFender-RH
E-28
ECM, O2 sensor
E-29ECM, Data link connector
Engine ECGI
harnessEngine-common
chamber
R-3
RR washer motor, Rear wiper motor, Luggage
room light, RR defogger, High mount stoplight,
Tailgate key SW, RR door lock actuator-LH,
Tailgate lock actuator-LH, RR power window
SW-LH
R-4Taillight, Stoplight, RR turn signal light, Backup
light, License plate light, Fuel tank unit, Fuel
pump, Trailer harness connector, RR fog light Rear body
harnessBody-RR
E-30
E-31ECM, Data link connector, A/T Shift indicator
control unit DIS
C-39Fuel pump relay, ECM main relay 5
C-39Windshield intermittent relay3
M-16
TCMMission
harnessEngine
C-39Side turn signal light (RH) 7
C-39Vehicle speed sensor, Brake fluid SW 8
I-39
AudioInstrument
harnessBody-FRT
C-85
EBCMEngine room
harnessBody-Center
U-2
SDMSRS
harnessBody-FRT