1998 ISUZU TROOPER Wiring

8J±2EXTERIOR/INTERIOR TRIM
Quarter Flipper Glass Assembly (S´W´B) 8J±33. . .
Quarter Flipper Glass Assembly and
Associated Parts 8J±33. . . . . . . . . . . . . . . . . . . . . .
Removal 8J±33. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8J±33. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Trim Panel (LH) 8J±34. . . . . . . . . . . . . . . . .
Tailgate Trim Panel (LH) and Associated
Parts 8J±34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8J±34. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8J±35. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tailgate Trim Panel (RH) 8J±36. . . . . . . . . . . . . . . . .
Parts Location 8J±36. . . . . . . . . . . . . . . . . . . . . . . .
Removal 8J±36. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8J±36. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Luggage Floor Box 8J±37. . . . . . . . . . . . . . . . . . . . . .
Luggage Floor Box and Associated Parts 8J±37.
Remove 8J±37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8J±37. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rope Hook Set 8J±37. . . . . . . . . . . . . . . . . . . . . . . . . Rope Hook Set and Associated Parts 8J±37. . . .
Removal 8J±37. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8J±37. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Door Mirror System 8J±38. . . . . . . . . . . . . . .
General Description 8J±38. . . . . . . . . . . . . . . . . . . . . .
Door Mirror Switch Assembly (Control Switch, Fold-
ing Switch and Defogger Switch) Removal 8J±38
Installation 8J±38. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Door Mirror 8J±38. . . . . . . . . . . . . . . . . . . . . . .
General Description 8J±38. . . . . . . . . . . . . . . . . . . .
Removal and Installation 8J±38. . . . . . . . . . . . . . .
Power Window System 8J±39. . . . . . . . . . . . . . . . . .
General Description 8J±39. . . . . . . . . . . . . . . . . . . . . .
Power Window Switch Removal and
Installation 8J±39. . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Window Motor Removal and
Installation 8J±40. . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data and Specifications 8J±41. . . . . . . . . . . . .
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.

SEAT BELT SYSTEM 9AÐ1
RESTRAINTS
CONTENTS
SEAT BELT SYSTEM
CONTENTS
Seat Belt System . . . . . . . . . . . . . . . . . . . . . . 9AÐ1
Supplemental Restraint System (SRS) . . . . . 9JÐ1Restraint Control System . . . . . . . . . . . . . . . . 9J1Ð1
Service Precaution . . . . . . . . . . . . . . . . . . . . . 9AÐ1
Seat Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ2
Front Seat Belt and Associated Parts
(Long Wheel Base) . . . . . . . . . . . . . . . . . . 9AÐ2
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ2
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ3
Front Seat Belt and Associated Parts
(Short Wheel Base) . . . . . . . . . . . . . . . . . . 9AÐ4
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ4
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ5
Rear Seat Belt and Associated Parts
(Long Wheel Base) . . . . . . . . . . . . . . . . . . 9AÐ6
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ6
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ6
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ7
Rear Seat Belt and Associated Parts
(Short Wheel Base) . . . . . . . . . . . . . . . . . . 9AÐ8
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ8
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ9
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ9
Third Seat Belt and Associated Parts
(Long Wheel Base) . . . . . . . . . . . . . . . . . . 9AÐ10
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ10
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ11
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ11Front Seat Buckle Assembly . . . . . . . . . . . . . 9AÐ12
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ12
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ12
Front Seat Buckle Assembly (W/Pretensioner)9AÐ12
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ12
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ12
Rear Center Seat Belt Buckle Assembly . . . 9AÐ13
Rear Center Seat Belt Buckle Assembly
and Associated Parts . . . . . . . . . . . . . . . . . 9AÐ13
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ13
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ13
Third Seat Belt Buckle and Lock Assembly . 9AÐ14
Third Seat Belt Buckle and Lock Assembly
and Associated Parts . . . . . . . . . . . . . . . . . 9AÐ14
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ14
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ14
Rear Seat Lock Assembly . . . . . . . . . . . . . . . 9AÐ15
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ15
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ15
Rear Seat Lock Assembly (Bench Type) . . . 9AÐ15
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ15
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ15
Rear Seat Strikers . . . . . . . . . . . . . . . . . . . . . 9AÐ16
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ16
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ16
Third Seat Striker . . . . . . . . . . . . . . . . . . . . . . 9AÐ16
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ16
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 9AÐ16
Main Data and Specifications . . . . . . . . . . . . 9AÐ17
Service Precaution
WARNING: THIS VEHICLE HAS 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
fasteners joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fasteners.
When you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts and
systems.

SUPPLEMENTAL RESTRAINT SYSTEM9J±1
RESTRAINTS
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
CONTENTS
Service Precaution 9J±1. . . . . . . . . . . . . . . . . . . . . .
General Description 9J±2. . . . . . . . . . . . . . . . . . . . .
SRS Component And Wiring Location View 9J±4.
Component Description 9J±4. . . . . . . . . . . . . . . . . .
Definitions 9J±7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnosis 9J±8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SRS Connector Body Face Views 9J±9. . . . . . . . .
Repairs And Inspections Required After
An Accident 9J±9. . . . . . . . . . . . . . . . . . . . . . . . . . . .
On±Vehicle Service 9J±10. . . . . . . . . . . . . . . . . . . . . .
Air Bag Assembly Handling / Shipping
/ Scrapping 9J±11. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pretensioner Seat Belt Handling / Shipping
/ Scrapping. 9J±11. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools 9J±26. . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Precautions for SRS Component
Service 9J±30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SRS Connectors 9J±31. . . . . . . . . . . . . . . . . . . . . . . .
Sensing And Diagnostic Module (SDM) 9J±33. . . .
Service Precautions 9J±33. . . . . . . . . . . . . . . . . . .
Removal 9J±33. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 9J±33. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driver Air Bag Assembly 9J±35. . . . . . . . . . . . . . . . .
Service Precautions 9J±35. . . . . . . . . . . . . . . . . . .
Removal 9J±35. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 9J±36. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering Wheel 9J±37. . . . . . . . . . . . . . . . . . . . . . . . . Service Precautions 9J±37. . . . . . . . . . . . . . . . . . .
Removal 9J±37. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 9J±38. . . . . . . . . . . . . . . . . . . . . . . . . . . .
SRS Coil Assembly 9J±39. . . . . . . . . . . . . . . . . . . . . .
Service Precautions 9J±39. . . . . . . . . . . . . . . . . . .
Removal 9J±39. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 9J±41. . . . . . . . . . . . . . . . . . . . . . . . . . . .
SRS Coil Replacement Procedure 9J±42. . . . . . . . .
Removal 9J±42. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How to Disconnect the horn terminal 9J±43. . . . .
How to Connect Horn Terminal 9J±43. . . . . . . . . .
Installation 9J±44. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering Column 9J±44. . . . . . . . . . . . . . . . . . . . . . . .
Service Precautions 9J±44. . . . . . . . . . . . . . . . . . .
Removal 9J±44. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 9J±46. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Passenger Air Bag Assembly 9J±48. . . . . . . . . . . . .
Service Precautions 9J±48. . . . . . . . . . . . . . . . . . .
Removal 9J±48. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 9J±48. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pretensioner Seat Belt (If so equipped) 9J±49. . . .
Service Precaution 9J±49. . . . . . . . . . . . . . . . . . . .
Parts Location 9J±49. . . . . . . . . . . . . . . . . . . . . . . .
Removal 9J±49. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 9J±49. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data and Specifications 9J±50. . . . . . . . . . . . .
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.

SUPPLEMENTAL RESTRAINT SYSTEM 9J±4
SRS Component And Wiring Location View
810RW298
Legend
(1) Battery
(2) Relay & Fuse Box
(3) Passenger Air Bag Assembly
(4) SDM
(5) Meter Assembly
(6) SRS Coil Assembly
(7) Driver Air Bag Assembly(8) Starter Switch
(9) Fuse Box, C±21
(10) SRS Body Earth
(11) Body Harness Connector
(12) Instrument Harness Connector
(13) Engine Haness Connector
(14) Pretensioner, LH (If so equipped)
(15) Pretensioner, RH (If so equipped)
Component Description
SDM (Sensing and Diagnostic Module)
WARNING:DURING SERVICE PROCEDURES, BE
VERY CAREFUL WHEN HANDLING A SENSING AND
DIAGNOSTIC MODULE (SDM). NEVER STRIKE OR
JAR THE SDM. NEVER POWER UP THE SRS WHEN
THE SDM IS NOT RIGIDLY ATTACHED TO THE
VEHICLE. ALL SDM AND MOUNTING BRACKETFASTENERS MUST BE CAREFULLY TORQUED AND
THE ARROW MUST BE POINTED TOWARD THE
FRONT OF THE VEHICLE TO ENSURE PROPER
OPERATION OF THE SRS. THE SDM COULD BE
ACTIVATED WHEN POWERED WHILE NOT RIGIDLY
ATTACHED TO THE VEHICLE WHICH COULD CAUSE
DEPLOYMENT AND RESULT IN PERSONAL INJURY.
The Sensing and Diagnostic Module (SDM) is designed
to perform the following functions in the SRS:

SUPPLEMENTAL RESTRAINT SYSTEM9J±5
1. Energy Reserve Ð The SDM maintains 24±Volt Loop
Reserve (24VLR) energy supply to provide
deployment energy when ignition voltage is lost in a
frontal crash.
2. Frontal Crash Detection Ð The SDM monitors
vehicle velocity changes to detect frontal crashes
which are severe enough to warrant deployment.
3. Air Bag Deployment Ð When a frontal crash of
sufficient force is detected, the SDM will cause
enough current to flow through the air bag assembly
to deploy the air bag.
4. Malfunction Detection Ð The SDM performs
diagnostic monitoring of SRS electrical components
and sets a diagnostic trouble code when a
malfunction is detected.
5. Frontal Crash Recording Ð The SDM records
information regarding SRS status during frontal
crash.
6. Malfunction Diagnosis Ð The SDM displays SRS
diagnostic trouble codes and system status
information through the use of a scan tool.
7. Driver Notification Ð The SDM warns the vehicle
driver of SRS malfunctions by controlling the ªAir
Bagº warning lamp.
The SDM is connected to the SRS wiring harness by a
24±pin connector. This harness connector uses a
shorting clip across certain terminals in the contact area.
This shorting clip connects the ªAIR BAGº warning lamp
to ground when the SDM harness connector is
disconnected or CPA (Connector Position Assurance) is
not inserted even if completely connected. This will
cause the ªAIR BAGº warning lamp to come ªONº steady
whenever the ignition switch is at the ON or START
positions with the SDM disconnected.
827RW044
Legend
(1) SDM
(2) SRS Harness
(3) Connector Position Assurance
ªAir Bagº Warning Lamp
Ignition voltage is applied to the ªAIR BAGº warning lamp
when the ignition switch is at the ON or START positions.
The SDM controls the lamp by providing ground with a
lamp driver. The ªAIR BAGº warning lamp is used in the
SRS to do the following:
1. Verify lamp and SDM operation by turn on 3.5
seconds and then turns ªOFFº when the ignition
switch is first turned ªONº.
2. Warn the vehicle driver of SRS electrical system
malfunctions which could potentially affect the
operation of the SRS. These malfunctions could
result in nondeployment in case of a frontal crash or
deployment for conditions less severe than intended.
The ªAIR BAG º warning lamp is the key to driver
notification of SRS malfunctions. For proper lamp
operation, refer to the ªSRS Diagnostic System Checkº in
this section.
821RW037
SRS Coil Assembly
The SRS coil assembly consists of two current carrying
coils. This is attached to the steering column and allow
rotation of the steering wheel while maintaining
continuous contact of the driver deployment loop to the
driver air bag assembly.
There is a shorting clip on the yellow 2±pin connector near
the base of steering column which connects the SRS coil
to the SRS wiring harness.
The shorting clip shorts to the SRS coil and driver air bag
assembly when the yellow 2±pin connector is
disconnected. The circuit to the driver air bag assembly is
shorted in this way to help prevent unwanted deployment
of the air bag when servicing the steering column or other
SRS components.

SUPPLEMENTAL RESTRAINT SYSTEM 9J±8
the deployment loops, high resistance or opens in the
ªDriver Side Highº, ªDriver Side Lowº, ªPassenger Side
Highº and ªPassenger Side Lowº circuits and measures
the resistance of the inflator assembly consisting of 1)
Initiators, 2) SRS coil assembly (driver side only), 3)
Connectors and associated wiring.
Normal Operating Voltage Range
The voltage measured between the SDM ªIgnition 1º
terminals and ªGroundº terminals is between 9 and 16
volts.
Passenger Current Source
An output of the SDM which applies current into the
passenger air bag assembly circuit during the ªInitiator
Assembly Resistance Testº.
Passenger Air Bag Assembly
An assembly located in the right side of the instrument
panel consisting of an inflatable bag, an inflator and an
initiator.
Scan Tool
An external computer used to read diagnostic information
from on±board computers via the data link connector.
SDM
Sensing and Diagnostic Module which provides reserve
energy to the deployment loops, deploys the air bags
when required and performs diagnostic monitoring of all
SRS components.
Serial Data
Information representing the status of the SRS.
SRS
Supplemental Restraint System.
SRS Coil Assembly
An assembly of two current±carrying coils in the driver
deployment loop that allows the rotation of the steering
wheel while maintaining the continuous contact of the
driver deployment loop to the driver air bag assembly.
SRS Wiring Harness
The wires and connectors that electrically connect the
components in the SRS.
ªTurn±ONº
Test which the SDM performs on the SRS once during
each ignition cycle immediately after ªIgnition 1º voltage
is applied to the SDM and before ªContinuous
Monitoringº.
Diagnosis
WARNING: T O AV O I D D E P L O Y M E N T W H E N
TROUBLESHOOTING THE SRS, DO NOT USE
ELECTRICAL TEST EQUIPMENT SUCH AS A
BATTERY±POWERED OR AC±POWERED
VOLTMETER, OHMMETER, ETC., OR ANY TYPE OF
ELECTRICAL EQUIPMENT OTHER THAN THAT
SPECIFIED IN THIS MANUAL. DO NOT USE A
NONPOWERED PROBE±TYPE TESTER.
INSTRUCTIONS IN THIS MANUAL MUST BE
FOLLOWED CAREFULLY, OTHERWISE PERSONAL
INJURY MAY RESULT.
Diagnostic Trouble Codes
The ªSRS Diagnostic System Checkº must always be the
starting point of any SRS diagnosis. The ªSRS
Diagnostic System Checkº checks for proper ªAIR BAGº
warning lamp operation and checks for SRS diagnostic
trouble codes using the scan tool.
1. Current diagnostic trouble codes ± Malfunctions that
are presently being detected. Current diagnostic
trouble codes are stored in RAM (Random Access
Memory).
2. History diagnostic trouble codes ± All malfunctions
detected since the last time the history memory was
cleared. History diagnostic trouble codes are stored
in EEPROM.
Scan Tool Diagnostics
A scan tool is used to read current and history diagnostic
trouble codes and to clear all diagnostic trouble codes
after a repair is completed. The scan tool must be
updated to communicate with the SRS through a
replaceable cartridge before it can be used for SRS
diagnostics. To use the scan tool, connect it to the data
link connector and turn the ignition switch ªONº. The scan
tool reads serial data from the SDM ªSerial Dataº line
terminal ª24º to the data link connector terminal ª9º.
Use Of Special Tools
WARNING: T O AV O I D D E P L O Y M E N T W H E N
TROUBLESHOOTING THE SRS, DO NOT USE
ELECTRICAL TEST EQUIPMENT SUCH AS A
BATTERY±POWERED OR AC±POWERED
VOLTMETER, OHMMETER, ETC, OR ANY TYPE OF
ELECTRICAL EQUIPMENT OTHER THAN THAT
SPECIFIED IN THIS MANUAL. DO NOT USE A NON
POWERED PROBE±TYPE TESTER. INSTRUCTIONS
IN THIS MANUAL MUST BE FOLLOWED
CAREFULLY, OTHERWISE PERSONAL INJURY MAY
RESULT. YOU SHOULD BE FAMILIAR WITH THE
TOOLS LISTED IN THIS SECTION UNDER THE
HANDLING SRS SPECIAL TOOLS.
You should be able to measure voltage and resistance.
You should be familiar with proper use of a scan tool such
as the Tech 2 Diagnostic Computer, SRS
Driver/Passenger Load Tool 5±8840±2421±0, Connector
Test Adapter Kit 5±8840±0385±0, and the DVM (Digital
Multimeter) 5±8840±0285±0.

SUPPLEMENTAL RESTRAINT SYSTEM 9J±10
Accident With Deployment ± Component
Replacement And Inspections
Certain SRS components must be replaced or inspected
for damage after a frontal crash involving air bag
deployment. Those components are:

Air bag assembly

SDM
CAUTION: Refer to ªSDM Replacement Guidelinesº
below for important information on SDM
replacement in both deployment and non
deployment crashes.

SRS coil assembly Ð Inspect wiring and connector
for any signs of scorching, melting, or damage due to
excessive heat. Replace if damaged. Refer to
section ªSRS Coil Assemblyº in this manual.
Accident With or Without Deployment ±
Component Inspection
Certain SRS system components and rotation parts must
be inspected after any crash, whether the air bag
deployed or not. Those components are:

Steering column Ð Refer to Inspection Required
ªAfter an Accidentº in this manual.

Knee bolsters and mounting points Ð Inspect for any
distortion, bending, cracking, or other damage.

I/P steering column reinforcement plate Ð Inspect for
any distortion, bending, cracking, or other damage.

I/P braces Ð Inspect for any distortion, bending,
cracking, or other damage.

Seat belts and mounting points Ð Refer to ªSeat
Beltsº in Section ªSeat Beltº of this workshop manual.
SDM Replacement Guidelines
SDM replacement policy requires replacement of SDM,
after crash involving air bag deployment when ªSRS
Warning Lampº turn ªONº, ªSRS Diagnosisº should be
done according to Section ªRestraint Control System.º
If accident without deployment air bag, it is not necessary
replacement of SDM when do not indicate to replace the
SDM by scan tool after SRS system check.
Wiring Damage
If any SRS wire harness is damaged, it should be
replaced. Don't repair SRS harness. It is replace only.
SRS Connector (Plastic Body And
Terminal Metal Pin) Damage
If any connector or terminal in the SRS wire harness
(except pigtails) is damaged, it should be replaced.
SRS Wire Pigtail Damage
If the wiring pigtail (a wire or wires attached directly to the
device, not by a connector) is damaged, the entire
component (with pigtail) must be replaced. Examples of
ªpigtailº components are the driver air bag assembly, the
passenger air bag assembly, and the SRS coil assembly.
On±Vehicle Service
Service Precaution
WARNING: WHEN PERFORMING SERVICE ON OR
AROUND SRS COMPONENTS OR SRS WIRING,
FOLLOW THE PROCEDURES LISTED BELOW TO
TEMPORARILY DISABLE THE SRS. FAILURE TO
FOLLOW PROCEDURES COULD RESULT IN
POSSIBLE AIR BAG DEPLOYMENT, PERSONAL
INJURY OR OTHERWISE UNNEEDED SRS REPAIRS.
The SDM in Driver±Passenger SRS can maintain
sufficient voltage to cause a deployment for up to 15
seconds after the ignition switch is turned ªOFF,º the
battery is disconnected, or the fuse powering the SDM is
removed.
Many of the service procedures require removal of the
ªC±21º fuse, and disconnection of the air bag assembly
from the deployment loop to avoid an accidental
deployment. If the air bag assembly is disconnected from
the deployment loop as noted in the ªDisabling the SRSº
procedure that follows, service can begin immediately
without waiting for the 15 second time period to expire.
Disabling The SRS
Removal
Turn the ignition switch to ªLOCKº and remove key.
1. Remove SRS fuse C±21, from left dash side lower
fuse block or disconnect battery.
2. Disconnect yellow 2±pin connector at the base of
steering column.
3. Remove glove box assembly, refer to ªPassenger Air
Bag Assembly Replacementº in this manual.
4. Disconnect yellow 2±pin connector behind the glove
box assembly.
CAUTION: W i t h t h e ª C±21º fuse removed and
ignition switch ªONº, the ªAIR BAGº warning lamp
will be ªONº. This is normal operation and does not
indicate an SRS malfunction.
Enabling The SRS
Installation
CAUTION: Never use the air bag assembly from
another vehicle. Use only the air bag assembly for
Trooper.
Turn ignition switch to ªLOCKº and remove key.
1. Connect yellow 2±pin connector passenger air bag
assembly.
2. Install glove box assembly. Refer to ªPassenger air
bag assembly replacementº in this manual.
3. Connect yellow 2±pin connector at the base of
steering column.
4. Install ªAIR BAGº fuse C±21 to left dash side lower
fuse block or connect battery.
Turn ignition switch to ªONº and verify that the ªAIR BAGº
warning lamp turn on 3.5 seconds and then turns ªOFF.º If
it does not operate as described, perform the ªSRS
Diagnostic System Checkº in this manual.

SUPPLEMENTAL RESTRAINT SYSTEM 9J±26
Special Tools
WARNING: T O AV O I D D E P L O Y M E N T W H E N
TROUBLESHOOTING THE SRS, DO NOT USE
ELECTRICAL TEST EQUIPMENT SUCH AS A
BATTERY±POWERED OR AC±POWERED
VOLTMETER, OHMMETER, ETC., OR ANY TYPE OF
ELECTRICAL EQUIPMENT OTHER THAN THAT
SPECIFIED IN THIS MANUAL. DO NOT USE A
NONPOWERED PROBE±TYPE TESTER.
INSTRUCTIONS IN THIS MANUAL MUST BE
FOLLOWED CAREFULLY, OTHERWISE PERSONAL
INJURY MAY RESULT.
5±8840±2421±0 SRS Driver/Passenger
Load Tool
901RS146The SRS Driver/Passenger Load Tool 5±8840±2421±0 is
used only when called for in this section. It is used as a
diagnostic aid and safety device to prevent inadvertent air
bag assembly deployment.
The load tool has three yellow connectors attached to its
case.
The three small connectors are electrically functional and
serve as resistive load substitutions.
No more than two connectors are used at any time. One
of the small connectors is used to substitute for the load of
the driver air bag assembly when it is connected at the top
of the column to the SRS coil assembly. Another small
connector is used to substitute for the load of the driver air
bag assembly and the SRS coil assembly when it is
connected at the base of the column to the SRS wiring
harness. The third small connector is used to substitute
for the load of the passenger air bag assembly and
pretensioner seat belt assembly when connected to the
passenger air bag assembly and pretensioner seat belt
assembly harness connector.
By substituting the resistance of the load tool when called
for, a determination can be made as to whether an inflator
circuit component is causing system malfunction and
which component is causing the malfunction. The loadtool should be used only when specifically called for in the
diagnostic procedures.
NOTE: If comand to use 5±8840±2421±0 load tool when
repair the pretensioner seat belt, connect load tool
connector to use for driver air bag and/or passenger air
bag connector.
5±8840±0285±0 DVM
901RS153The 5±8840±0285±0 DVM is the preferred DVM for use in
SRS diagnosis and repair. However, 5±8840±0366±0
may be used if 5±8840±0285±0 is not available. No other
DVMs are approved for SRS diagnosis and repair.
Scan Tool
901RW176The Tech 2 is used to read and clear SRS Diagnostic
Trouble Codes (DTCs). Refer to the Tech 2 Operators,
Manual for specific information on how to use the Tech 2.