Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual - part 1688

SUPPLEMENTAL RESTRAINT SYSTEM

9J–9

SRS Connector Body Face Views

D09RW003

Legend

(1) Sensing and Diagnostic Module (SDM)
(2) Driver Air Bag Assembly
(3) Passenger Air Bag Assembly

(4) “Air Bag” Warning Lamp
(5) Supplemental Restraint System (SRS) Coil

Assembly

(6) Data Link Connector (DLC)

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.

D

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.

D

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

D

Verify the part number of replacement air bag
assembly.

CAUTION: Never use the air bag assembly from
another vehicle.
Use only the air bag assembly for UE models.

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:

D

Air bag assembly

D

SDM

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

SUPPLEMENTAL RESTRAINT SYSTEM

9J–10

D

Supplemental Restraint System (SRS) coil
assembly—Inspect wiring and connector for any
signs of scorching, melting, or damage due to
excessive heat.   Replace if damaged.  Refer to SRS
coil assembly in this section.

Accident With or Without
Deployment—Component Inspection

Certain SRS and restraint system components must be
inspected after any crash, whether the air bag deployed
or not.  Those components are:

D

Steering column—Dimensionally inspect per
“Checking Steering Column for Accident Damage” in
2A section of this workshop manual.

D

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

D

Instrument panel steering column reinforcement
plate— Inspect for any distortion, bending, cracking,
or other damage.

D

Instrument panel braces—Inspect for any distortion,
bending, cracking, or other damage.

D

Seat belts and mounting points—Refer to “Seat
Belts” in 9 section 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 9J1 section.

Wiring Damage

If any SRS wire harness is damaged, it should be
replaced. Don’t repair SRS.

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 Precautions

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
“SRS” 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 “METER” and “SRS”, 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 section.

4. Disconnect yellow 2–pin connector behind the glove

box assembly.

CAUTION: With the “SRS” fuse removed and
ignition switch “ON”, “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. Use only the air bag assembly.
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 section.

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

steering column.

4. Install “AIR BAG” fuse “METER” and “SRS” 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
“Supplemental Restraint System (SRS) Diagnostic
System Check” in section.

Handling / Installation / Diagnosis

1. Air bag assembly should not be subjected to

temperatures above 93

°

C (200

°

C).

2. Air bag assembly, and Sensing and Diagnostic

Module (SDM) should not be used if they have been
dropped from a height of 100 centimeters (3.28 feet).

SUPPLEMENTAL RESTRAINT SYSTEM

9J–11

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.

827RW009

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 Supplemental Restraint System
(SRS) air bag assembly shipping procedures.

Deployed Air Bag Assembly

“You should wear gloves and glasses. After the air bag
assembly has been deployed, the surface of the air bag
may contain solid particulate. This solid particulate
consists primarily of by products of the chemical reaction,
Potassium Chloride and copper metal dust. Compounds
of Potassium Borate, Strontium Chloride, Copper
Chloride, and Ammounium Chloride may be found in
amounts of about 1% (each) of the total particulate.”

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.  Alive air bag assembly must not be
disposed of through normal refuse channels.

SUPPLEMENTAL RESTRAINT SYSTEM

9J–12

WARNING: FAILURE TO FOLLOW PROPER 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 module, 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.

Cautions About Air Bag Deployment And
Disposal

Failure to follow proper procedures could result in
erroneous air bag deployment which may cause personal
injury be sure to follow proper procedures.

1. Turn the ignition switch off (Lock) and disconnect the

ground (minus) terminal of the battery, and wait 15
seconds prior to performing air bag removal
procedures.

2. Do not disassemble the air bag.
3. Avoid sudden impacts on or near the airbag

assembly, and avoid placing magnets in close
proximity from the airbag assembly (The airbag may
deploy unexpectedly).

4. Place the air bag with its trim cover up.
5. Do not let the air bag deploy directly on the floor. (The

air bag may be blown off 20 

∼

 30 cm (6.5 or 10 feet)).

6. Be sure to install the air bag firmly to a deployment

tool (fixing tool).

7. Set a battery 10 m (33 feet) or more away from the air

bag.

8. Before disconnecting air bag harness, ground the

worker by touching the vehicle outer panel with bare
hand.

9. Do not place the airbag assembly in front of you when

connecting or disconnecting the harness.

10. Avoid loud outbursts as it may trigger the airbag to

deploy.

11. As deployment generates smoke, select a well

ventilated place. (In case of deployment indoors,
avoid deployment just under a fire alarm, smoke
sensor, and fluorescent lamps).

12. Be careful not to inhale the smoke after deployment.

13. Install a car cover on vehicles with damaged or

broken glass, a sudden airbag deployment may
scatter broken glass, which may cause injury.

14. Do not handle the airbag after deployment for the next

30 minutes, it may still be too hot to touch.

15. Do not spray water on the airbag, immediately after

deployment.

16. Always wear safety goggles and gloves when

handling the airbag and wash immediately after use.

17. Do not reuse the removed air bag for another vehicle.

(Deployment characteristic is different with vehicle
types).

Deployment Outside Vehicle (Driver Air
Bag Assembly)

Deployment of a live (undeployed) airbag assembly for
disposal should not take place in the vehicle. This
includes vehicles that needs replacement airbag
assembly. Disposal of a malfunctioning air bag assembly
is subjected to a retention period.
Proper service procedures must be followed when
performing live (undeployed) airbag deployment in the
shop floor or open area live (undeployed) airbag
deployment.  Safety glasses and gloves must always be
worn during live (undeployed) airbag deployment until the
deployed airbag assembly has been properly disposed of
or an undeployed airbag 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
Supplemental Restraint System (SRS) Deployment
Harness with the appropriate pigtail adapter. The
procedure also requires the use of J–41497 Driver Side
SRS Deployment Fixture. Do not attempt this procedure
without J–42986 and fixture J–41497.

901RX046