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Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1042

SUPPLEMENTAL RESTRAINT SYSTEM

9J–9

SRS Connector Body Face Views

D09RW003

Legend

(1) SDM
(2) Driver Air Bag Assembly
(3) Passenger Air Bag Assembly

(4) “Air Bag” Warning Lamp
(5) SRS Coil Assembly
(6) DLC Connector

Repairs And Inspections Required
After An Accident

NOTE: If any SRS components are damaged, they must
be replaced. If SRS component mounting points are
damaged, they must be replaced.

Never use SRS parts from another vehicle. This does
not include remanufactured parts purchased from an
authorized dealer; they may be used for SRS repairs.

Do not attempt to service the SDM, the SRS coil
assembly, or the air bag assembly. Service of these
items is by replacement only.

Verify the part number of replacement air bag
assembly.

Use only new air bag assembly proper to the Trooper
which is being repaired.

CAUTION: Proper operation of the sensors and
supplemental restraint system (SRS) requires that
any repairs to the vehicle structure return it to the
original production configuration. Deployment
requires, at a minimum, replacement of the SDM, air
bag assembly and dimensional inspection of the
steering column. Any visible damage to the SDM
mounting bracket (s) requires replacement, and the
steering column must be dimensionally inspected,
whether deployment occurred or not.

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

SUPPLEMENTAL RESTRAINT SYSTEM

9J–10

CAUTION: Refer to “SDM Replacement Guidelines”
below for important information on SDM
replacement in both deployment and non
deployment crashes.

SRS coil assembly — Inspect wiring and connector
for any signs of scorching, melting, or damage due to
excessive heat. Replace if damaged. Refer to
section “SRS Coil Assembly” 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 — Refer to Inspection Required
“After an Accident” in this manual.

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

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

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

Seat belts and mounting points — Refer to “Seat
Belts” in Section “Seat Belt” of this workshop manual.

SDM Replacement Guidelines

SDM replacement policy requires replacement of SDM,
after crash involving air bag deployment when “SRS
Warning Lamp” turn “ON”, “SRS Diagnosis” should be
done according to Section “Restraint Control System.”

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
“pigtail” 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 “OFF,” the
battery is disconnected, or the fuse powering the SDM is
removed.
Many of the service procedures require removal of the
“C–21” 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 “Disabling the SRS”
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 “LOCK” 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 “Passenger Air

Bag Assembly Replacement” in this manual.

4. Disconnect yellow 2–pin connector behind the glove

box assembly.

CAUTION: With the “C–21” fuse removed and
ignition switch “ON”, the “AIR BAG” warning lamp
will be “ON”. 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 and difference model year air bag
assembly.
The air bag assembly has identification colors on the
bar code label from ’00 model as follows.
Yellow color for driver air bag assembly.
White color for passenger air bag assembly.
Use only new air bag assembly proper to the Trooper
which is being repaired.
Turn ignition switch to “LOCK” and remove key.

1. Connect yellow 2–pin connector passenger air bag

assembly.

2. Install glove box assembly. Refer to “Passenger air

bag assembly replacement” in this manual.

3. Connect yellow 2–pin connector at the base of

steering column.

4. Install “AIR BAG” fuse C–21 to left dash side lower

fuse block or connect battery.

Turn ignition switch to “ON” and verify that the “AIR BAG”
warning lamp flashes seven times and then turns “OFF.” If
it does not operate as described, perform the “SRS
Diagnostic System Check” in this manual.

SUPPLEMENTAL RESTRAINT SYSTEM

9J–11

Handling / Installation / Diagnosis

1. Air bag assembly should not be subjected to

temperatures above 65

C (150

F).

2. Air bag assembly, and SDM should not be used if they

have been dropped from a height of 100 centimeters
(3.28 feet) or more.

3. When a SDM is replaced, it must be oriented with the

arrow on the sensor pointing toward the front of the
vehicle. It is very important for the SDM to be located
flat on the mounting surface, parallel to the vehicle
datum line. It is important that the SDM mounting
surface is free of any dirt or other foreign material.

4. Do not apply power to the SRS unless all components

are connected or a diagnostic chart requests it, as this
will set a diagnostic trouble code.

5. The “SRS Diagnostic System Check” must be the

starting point of any SRS diagnostics. The “SRS
Diagnostic System Check” will verify proper “AIR
BAG” warning lamp operation and will lead you to the
correct chart to diagnose any SRS malfunctions.
Bypassing these procedures may result in extended
diagnostic time, incorrect diagnosis, and incorrect
parts replacement.

Air Bag Assembly Handling /
Shipping / Scrapping

Live (Undeployed) Air Bag Assembly

Special care is necessary when handling and storing a
live (undeployed) air bag assembly. The rapid gas
generation produced during deployment of the air bag
could cause the air bag assembly, or an object in front of
the air bag assembly, to be thrown through the air in the
unlikely event of an accidental deployment.

827RV004

WARNING: WHEN CARRYING A LIVE AIR BAG
ASSEMBLY, MAKE SURE THE BAG OPENING IS
POINTED AWAY FROM YOU. IN CASE OF AN
ACCIDENTAL DEPLOYMENT, THE BAG WILL THEN
DEPLOY WITH MINIMAL CHANCE OF INJURY.
NEVER CARRY THE AIR BAG ASSEMBLY BY THE

WIRES OR CONNECTOR ON THE UNDERSIDE OF
THE MODULE.

827RS044

Air Bag Assembly Shipping Procedure For
Live (Undeployed) Air Bag Assemblies

Service personnel should refer to the latest Service
Bulletins for proper SRS air bag assembly shipping
procedures.

Deployed Air Bag Assembly (Driver Side)

You should wear gloves and safety glasses. After the air
bag assembly has been deployed, the surface of the air
bag may contain a powdery residue. This powder
consists primarily of cornstarch (used to lubricate the bag
as it inflates) and by products of the chemical reaction.
Sodium hydroxide dust (similar to lye soap) is produced
as a by product of the deployment reaction. The sodium
hydroxide then quickly reacts with atmospheric moisture
and is converted to sodium carbonate and sodium
bicarbonate (baking soda). Therefore, it is unlikely that
sodium hydroxide will be present.

Air Bag Assembly Scrapping Procedure

During the course of a vehicle’s useful life, certain
situations may arise which will necessitate the disposal of
a live (undeployed) air bag assembly. This information
covers proper procedures for disposing of a live air bag
assembly.
Before a live air bag assembly can be disposed of, it must
be deployed. A live air bag assembly must not be
disposed of through normal refuse channels.

SUPPLEMENTAL RESTRAINT SYSTEM

9J–12

WARNING: FAILURE TO FOLLOW PROPER
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) AIR
BAG ASSEMBLY DISPOSAL PROCEDURES CAN
RESULT IN AIR BAG DEPLOYMENT WHICH MAY
CAUSE PERSONAL INJURY. AN UNDPLOYED AIR
BAG ASSEMBLY MUST NOT BE DISPOSED OF
THROUGH NORMAL REFUSE CHANNELS. THE
UNDEPLOYED AIR BAG ASSEMBLY CONTAINS
SUBSTANCES THAT CAN CAUSE SEVERE ILLNESS
OR PERSONAL INJURY IF THE SEALED CONTAINER
IS DAMAGED DURING DISPOSAL. DISPOSAL IN
ANY MANNER INCONSISTENT WITH PROPER
PROCEDURES MAY BE A VIOLATION OF FEDERAL,
STATE, AND / OR LOCAL LAW.

In situations which require deployment of a live air bag
assembly, deployment may be accomplished inside or
outside the vehicle. The method employed depends
upon the final disposition of the particular vehicle, as
noted in “Deployment Outside Vehicle” and “Deployment
Inside Vehicle” in this section.

Deployment Outside Vehicle (Driver Air
Bag Assembly)

Deployment outside the vehicle is proper when the
vehicle is to be returned to service. This includes, for
example, situations in which the vehicle will be returned to
useful service after a functionally or cosmetically deficient
air bag assembly is replaced. Deployment and disposal
of a malfunctioning air bag assembly is, of course, subject
to any required retention period.
For deployment of a live (undeployed) air bag assembly
outside the vehicle, the deployment procedure must be
followed exactly. Always wear safety glasses during this
deployment procedure until a deployed air bag assembly
is scrapped or until an undeployed air bag assembly is
shipped. Before performing the procedures you should
be familiar with servicing the SRS and with proper
handling of the air bag assembly. Procedures should be
read fully before they are performed.
The following procedure requires use of J–42986 SRS
deployment harness with appropriate pigtail adapter. Do
not attempt procedure without J–42986 adapter.

WARNING: FAILURE TO FOLLOW PROCEDURES IN
THE ORDER LISTED MAY RESULT IN PERSONAL
INJURY. NEVER CONNECT DEPLOYMENT
HARNESS TO ANY POWER SOURCE BEFORE
CONNECTING DEPLOYMENT HARNESS TO THE
DRIVER AIR BAG ASSEMBLY. DEPLOYMENT
HARNESS SHALL REMAIN SHORTED AND NOT BE
CONNECTED TO A POWER SOURCE UNTIL THE AIR
BAG IS TO BE DEPLOYED. THE AIR BAG
ASSEMBLY WILL IMMEDIATELY DEPLOY THE AIR
BAG WHEN A POWER SOURCE IS CONNECTED TO
IT. WEAR SAFETY GLASSES THROUGHOUT THIS
ENTIRE DEPLOYMENT AND DISPOSAL
PROCEDURE.

NOTE: This information applies only to driver air bag
assembly . Refer to “Deployment Outside Vehicle
(Passenger Air Bag assembly)” in this section for
information on passenger air bag assembly scrapping.

1. Turn ignition switch to “LOCK”, remove key and put

on safety glasses.

2. Inspect J–42986 SRS Deployment Harness and

appropriate pigtail adapter for damage. If harness or
pigtail adapter is damaged, discard and obtain a
replacement.

3. Short the two SRS deployment harness leads

together by fully seating one banana plug into the
other. SRS deployment harness shall remain shorted
and not be connected to a power source until the air
bag is to be deployed.

827RS004

4. Connect the appropriate pigtail adapter to the SRS

deployment harness.

5. Remove the driver air bag assembly from vehicle.

Refer to “Inflator Module Removal” in this manual.

WARNING: WHEN STORING A LIVE AIR BAG
ASSEMBLY OR WHEN LEAVING A LIVE AIR BAG
ASSEMBLY UNATTENDED ON A BENCH OR OTHER
SURFACE, ALWAYS FACE THE AIR BAG AND TRIM
COVER UP AND AWAY FROM THE SURFACE. THIS
IS NECESSARY SO THAT A FREE SPACE IS
PROVIDED TO ALLOW THE AIR BAG TO EXPAND IN
THE UNLIKELY EVENT OF ACCIDENTAL
DEPLOYMENT. FAILURE TO FOLLOW
PROCEDURES MAY RESULT IN PERSONAL INJURY.

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