1998 ISUZU TROOPER ignition

1BÐ114 AIR CONDITIONING
Chart A: Fan Does Not Rotate At All
NOFailure on the power supply system.
NOFailure on the ground or the harness is
disconnected.
NOReplace the fan motor.
YES
YES YES
Turn on the ignition switch (the engine is
started).
Refer to Charts B and C.
Is the battery voltage present between the
chassis harness side connector terminal
No.2 and the ground?
B-5
Are the chassis harness side connector
terminals No.4 and the ground
(No. ) conducted?
B-1
I-51
Is the battery voltage present between
the chassis harness side connector
terminals No.1 and No.2 ?
B-5B-5
Type of trouble
The fan does not
rotate in any mode
other than MAX HI.The fan does not stop.
Chart BChart CChart D
The fan does not
rotate in the MAX HI
mode.The fan does not
rotate at all.
Chart A

AIR CONDITIONING 1BÐ115
Chart B: Fan Does Not Rotate in MAX HI Mode
NOThe harness is disconnected.
YES
NONONO YES
YES
YES
Turn on the ignition switch (the engine is
started).
Set the fan switch to the MAX HI.
The harness is
disconnected.Failure on the automatic
heater/air conditioner
control unit.
Failure on the MAX
HI relay.Failure on the
ground or the
harness is
disconnected.Is the battery voltage present between the
chassis harness side connector terminal
No.12 and the ground?
I-32
Are the chassis harness side connector
terminal No.4 and the body ground
(No. ) conducted?
B-1
I-51
Are the chassis harness side connector
terminals No.1 and No.2
conducted?I-51B-5
Is the battery voltage present between
the chassis harness side connector
terminal No.1 and No.3 d?
I-51I-51

AIR CONDITIONING 1BÐ117
Chart D: Fan Does Not Stop
NOReplace the power transistor.
NOReplace the relay.
YES
NO YES
Turn on the ignition switch (the engine is
started).
YES
Is the power transistor performance
normal? (Refer to the later section on
"Check Up".)
Is the MAX HI relay performance
normal? (Refer to the later section on
"Check Up".)
Is the battery voltage present between
the chassis harness side connector
terminals No.1 and No.3 ?
I-51I-51
The chassis harness side connector
terminals No.1 and No.2 , or
No.1 and No.1 is short
circuited.
I-50B-5
I-51B-5
Failure on the automatic heater/air
conditioner control unit. Or, the harness
line is short circuited between the chassis
harness side connector terminals No.3
and No.12 .
I-32I-51

AIR CONDITIONING 1BÐ119
Chart A: Magnet Clutch Does Not work
NOThe harness is disconnected.
NOReplace the failed relay.
NOFailure on the power supply system.
NO
NO
NOReplace the fuse.
YESFailure on the magnet clutch.
NOReplace the electronic thermostat.
YES
YES YES
YES
YESNO
YES
The harness is disconnected.
Failure on the pressure switch or
refrigerant is insufficient.
Turn the A/C (air conditioner) switch on.
Are the pressure switch side connector
terminals No.1 and No.2
conducted?C-25C-25
Are relays normal?
Is fuse (C-20) 10A normal?
Is the electronic thermostat normal?
Is the battery voltage present between
the chassis harness side connector
terminal No.1 and the ground?
E-3
Is the battery voltage present between
the chassis harness side connector
terminal No.1 and the ground.
C-25
Is the battery voltage present between
the chassis side relay terminal No.3
and the ground, and No.1
and the ground?
X-7X-5
YES
Turn the ignition switch off.
Is conduction provided between the
following chassis harness side connecter
terminals?
No.2 and No.2 .
No.4 and No.1 .
E-3X-7
X-7X-5
Turn the ignition switch on (the engine is
started).
Magnet clutch does not work
Chart A
Type of trouble

AIR CONDITIONING 1BÐ125
Power Transistor
1. Remove the power transistor connector (I-47)
from the evaporator assembly.
2. Check the conduction between the power
transistor side terminals.
MAX HI Relay
1. Remove the MAX HI relay connector (B-64) from
the blower assembly.
2. Check the conduction between the MAX HI relay
side terminals.In Car Sensor
1. Turn on the ignition switch (the engine is
started). Start the air conditioner in "Full Auto".
2. Make sure that the in car sensor suctions
cigarette smokes and such.
3. Dismount the in car sensor from the automatic
heater/air conditioner control unit. Connect (+)
end and (-) end of the battery to the aspirator
motor side terminals No.1 and No.2
, respectively, then
check if the motor runs normally.I-34
I-34














"650
4321
C01RW020
43
3 41
2 21
No continuity between terminals (2) and (4).
Continuity between terminal (2) and (4) when battery
voltage is applied between (1) and (3).
C01RY00003
1
2
3
Terminal
No.Conduction
Conducted (50½ maximum)
Conducted (100½ maximum)
Conducted (220½ maximum) Not conducted
Not conducted 1
µ23
Testing
rod
µ
µ
µ
µ
´
´
´
´
´
1 23
C01RY00002

SERVICE INFORMATION 00 – 9
Problem Possible Cause Correction
STEERING COLUMN
LOCK SYSTEM
Will Not Unlock
Will Not Lock
Key Cannot Be Removed
in “OFF-LOCK”1. Damaged lock cylinder.
2. Damaged sector.
3. Damaged park lock cable.
1. Lock spring broken or worn.
2. Damaged lock cylinder.
3. Ignition switch stuck.
4. Park lock cable damaged.
1. Ignition switch is not set correctly.
2. Damaged lock cylinder.
3. Faulty shift lock mechanism.Replace lock cylinder.
Replace lock cylinder.
Replace park lock cable.
Replace lock cylinder.
Replace lock cylinder.
Repair or replace ignition
switch.
Replace park lock cable.
Correct ignition switch.
Replace lock cylinder.
Repair or replace the shift lock
mechanism.
Problem Possible Cause Correction
COLUMN
Noise in Column1. Universal joint loose.
2. Shaft lock snap ring not seated.Tighten joint.
Place snap ring in proper
position.

This steering wheel and column repair section
covers the Supplemental Restraint System (SRS)
steering column. The following repair procedures
are specific to SRS Components. When servicing a
vehicle equipped with Supplemental Restraint
System, pay close attention to all WARNINGS and
CAUTIONS.
For detailed explanation about SRS, refer to Section
9J "SUPPLEMENTAL RESTRAINT SYSTEM (SRS)"
of manual.
The steering column has three important features in
addition to the steering function:
1. The column is energy absorbing, designed to
compress in a front-end collision to minimize
the possibility of injury to the driver of the
vehicle.
2. The ignition switch and lock are mounted
conveniently on the column.
3. With the column mounted lock, the ignition
and steering operation can be locked to
prevent theft of the vehicle.
The column may be disassembled and
reassembled. To insure the energy absorbing
action, it is important that the specified screws,
bolts and nuts be used only as designated and that
they are tightened to the specified torque.
When the column is removed from the vehicle, a
sharp blow on the end of steering shaft or shift
lever, leaning on the column assembly, or dropping
the assembly could shear or loosen the fasteners
that maintain column rigidity.
WARNING
THIS VEHICLE HAS A SUPPLEMENTAL RE-
STRAINT 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 INFORM ATION.
FAILURE TO FOLLOW WARNINGS COULD RE-
SULT IN POSSIBLE AIR BAG DEPLOYMENT,
PERSONAL INJURY, OR OTHERWISE UN-
NEEDED SRS SYSTEM REPAIRS.
SAFE HANDLING OF INFLATOR MODULES
REQUIRES FOLLOWING THE PROCEDURES
DESCRIBED BELOW FOR BOTH LIVE AND
DEPLOYED MODULES.
SAFETY PRECAUTIONS MUST BE FOLLOWEDWHEN HANDLING A DEPLOYED AIR BAG AS-
SEMBLY (AIR BAG). AFTER DEPLOYMENT,
THE AIR BAG ASSEMBLY (AIR BAG) SURFACE
MAY CONTAIN A SMALL AMOUNT OF SODIUM
HYDROXIDE, A BY-PRODUCT OF THE DEPLOY-
MENT REACTION, THAT IS IRRITATING TO THE
SKIN AND EYES.MOST OF THE POWDER ON
THE AIR BAG ASSEMBLY (AIR BAG) IS HARM-
LESS. AS A PRECAUTION, WEAR GLOVES
AND SAFETY GLASSES WHEN HANDLING A
DEPLOYED AIR BAG ASSEMBLY, AND WASH
YOUR HANDS WITH MILD SOAP AND WATER
AFTERWARDS.
WHEN CARRYING A LIVE AIR BAG ASSEMBLY,
MAKE SURE THE BAG AND TRIM COVER ARE
POINTED AWAY FROM YOU. NEVER CARRY
AN AIR BAG ASSEMBLY BY THE WIRES OR
CONNECTOR ON THE UNDERSIDE OF MODULE.
IN THE CASE OF AN ACCIDENTAL DEPLOY-
MENT, THE BAG WILL THEN DEPLOY WITH
MINIMAL CHANCE OF INJURY. WHEN PLACING
A LIVE AIR BAG ASSEMBLY ON A BENCH OR
OTHER SURFACE, ALWAYS FACE THE BAG AND
TRIM COVER UP, AWAY FROM THE SURFACE.
NEVER REST A STEERING COLUMN ASSEMBLY
ON THE STEERING WHEEL WITH THE AIR
BAG ASSEMBLY FACE DOWN AND COLUMN
VERTICAL.THIS IS NECESSARY SO THAT A
FREE SPACE IS PROVIDED TO ALLOW THE AIR
BAG ASSEMBLY TO EXPAND IN THE UNLIKELY
EVENT OF ACCIDENTAL DEPLOYMENT. OTHER-
WISE, PERSONAL INJURY COULD RESULT.
TO AVOID DEPLOYMENT WHEN TROUBLE
SHOOTING THE SRS SYSTEM, DO NOT USE
ELECTRICAL TEST EQUIPMENT, SUCH AS
BATTERY-POWERED OR A/C-POWERED VOLT-
METER, OHMMETER, ETC., OR ANY TYPE OF
ELECTRICAL EQUIPMENT OTHER THAN SPECI-
FIED IN THIS MANUAL. DO NOT USE A NON-
POWERED PROBE-TYPE TESTER.
INSTRUCTIONS IN THIS MANUAL MUST BE
FOLLOWED CAREFULLY, OTHERWISE PER-
SONAL INJURY MAY RESULT. 2A – 52 SUPPLEMENTAL RESTRAINT SYSTEM STEERING WHEEL & COLUMN
GENERAL DESCRIPTION

2A – 54 SUPPLEMENTAL RESTRAINT SYSTEM STEERING WHEEL & COLUMN
INFLATOR MODULE REPLACEMENT
1
3
2
Removal Steps
1. Fixing bolt
2. Module connector
3. Inflator module
Installation Steps
3. Inflator module
2. Module connector
1. Fixing bolt
827RS049
These steps are based on the LHD model.
REMOVAL
Preparation:
1) Turn the steering wheel so that the vehicle's wheels
are pointing straight ahead.
2) Turn the ignition switch to "LOCK".
3) Disconnect the battery ground cable, and wait at least
5 minutes.
4) Disconnect the yellow 2way SRS connector located
under the steering column.
1. Fixing Bolt
Loosen the inflator module fixing bolt from behind
the steering wheel assembly using a TORX‚ driver or
equivalent until the inflator module can be released
from steering assembly.
827RS014