Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1692

SUPPLEMENTAL RESTRAINT SYSTEM

9J–25

30. Connect the passenger deployment harness wires to

a power source to immediately deploy the passenger
air bag assembly.   Recommended application: 12
volts minimum, 2 amps minimum.  A vehicle battery is
suggested.  (Driver air bag assembly) Put on a pair of
shop gloves and safety gasses to protect your hands
and eyes from possible irritation and heat when
handling the deployed air bag assembly. 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
Ammonium Chloride may be found in amounts of
about 1% (each) of the total particulate.
(Passenger air bag assembly)
Put on a pair of shop gloves and safety glasses to
protect your hands and eyes from possible irritation
and heat when handling the deployed air bag
assembly.
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 after
deployment.

WARNING: SAFETY PRECAUTIONS MUST BE
OBSERVED WHEN HANDLING A DEPLOYED AIR
BAG ASSEMBLY.  AFTER DEPLOYMENT, THE
METAL SURFACES OF THE AIR BAG ASSEMBLY
WILL BE VERY HOT.  ALLOW THE AIR BAG
ASSEMBLY TO COOL BEFORE HANDLING ANY
METAL PORTION OF IT.  DO NOT PLACE THE HOT
DEPLOYED AIR BAG ASSEMBLY NEAR ANY
FLAMMABLE OBJECTS.  FAILURE TO FOLLOW
PROCEDURES COULD RESULT IN FIRE OR
PERSONAL INJURY.

After an air bag assembly has been deployed, the
metal canister and surrounding areas of the air bag
assembly will be very hot.  Do not touch the metal
areas of the air bag assembly for about 30 minutes
after deployment.  If the deployed air bag assembly
must be moved before it is cool, wear gloves and
handle by the air bag or trim cover.

31. Short the driver deployment harness wires by twisting

together one end from each.  Repeat this procedure
for the passenger deployment harness.

32. Carefully remove drop cloth from vehicle and clean off

any fragments or discard drop cloth entirely.

33. Disconnect driver deployment harness and

passenger deployment harness from vehicle and
discard.

34. In the unlikely event that either or both of the air bag

assemblies did not deploy after following these
procedures, proceed immediately with Steps 36
through 37. If the air bag assembly deployed, proceed
to step 35.

35. With both air bags deployed, the vehicle may be

scrapped in the same manner as a non–SRS
equipped vehicle.

NOTE: The remaining steps are to be followed in the
unlikely event that the air bag assembly did not deploy
after following these procedures.

36. Remove the undeployed air bag assembly (s) from

the vehicle.  For driver air bag assembly refer to in the
“Passenger Air Bag Assembly Removal” in this
section.

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 BAG AND TRIM
COVER UP, 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 COULD
RESULT IN PERSONAL INJURY.

37. Temporarily store the air bag assembly with the air

bag opening facing up, away from the surface upon
which it rests.

Deployed Air Bag Assembly Handling

Put on a pair of shop gloves and safety glasses to protect
your hands and eyes from possible irritation and heat
when handling the deployed air bag assembly.
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 Ammonium Chloride may
be found in amounts of about 1% (each) of the total
particulate.
(Passenger air bag assembly)
Put on a pair of shop gloves and safety glasses to protect
your hands and eyes from possible irritation and heat
when handling the deployed air bag assembly.
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 after deployment.

SUPPLEMENTAL RESTRAINT SYSTEM

9J–26

Special Tools

WARNING: TO AVOID DEPLOYMENT WHEN
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.

J–41433 SRS Driver/Passenger Load Tool

The Supplemental Restraint System (SRS)
Driver/Passenger Load Tool J–41433 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 four 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 when
connected to the passenger air bag 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 load
tool should be used only when specifically called for in the
diagnostic procedures.

901RS146

J–39200 DVM

The J–39200 Digital Multimeter (DVM) is the preferred
DVM for use in SRS diagnosis and repair.   However,
J–34029–A may be used if J–39200 is not available.  No
other DVMs are approved  for SRS diagnosis and repair.

901RS153

Scan Tool

The Tech 2 is used to read and clear SRS Diagnostic
Trouble Codes (DTCs).  Refer to the Tech 2 Operator’s
Manual for specific information on how to use the Tech 2.

901RW176

SUPPLEMENTAL RESTRAINT SYSTEM

9J–27

J–35616–A Connector Test Adapter Kit

The J–35616–A Connector Test Adapter Kit must be used
whenever a diagnostic procedure requests checking or
probing a terminal.  Using the appropriate adapter will
ensure that no damage to the terminal will occur from the
Digital Multimeter (DVM) with “probe”, such as spreading
or bending.  The adapter will also give an idea of whether
contact tension is sufficient, helping to find an open or
intermittent open due to poor terminal contact.

901RS151

J–42986 SRS Deployment Tool

The J–42986 Supplemental Restraint System (SRS)
Deployment Tool must be used for deployment of the
undeployed air bag.

901RX046

J–42987 SRS Adapter For Load Tool

J–42987 SRS adapter is used to connect the previous
load tool to the new SRS system (if needed).

901RW107

J–41497 SRS Deployment Fixture

The J–41497 SRS Deployment Fixture must be used for
deployment of the undeployed passenger side air bag.

901RW088

SUPPLEMENTAL RESTRAINT SYSTEM

9J–28

Service Precaution

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 value must be used when
installing fasteners that require it. if the above
conditions are not followed, parts or system damage
could result.

WARNING: WHEN PERFORMING SERVICE ON OR
AROUND SUPPLEMENTAL RESTRAINT SYSTEM
(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 Sensing and Diagnostic Module (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 “OFF” and turn the steering
wheel so that the vehicle’s wheels are pointing straight
ahead.

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 this section.

4. Disconnect passenger air bag assembly yellow 2–pin

connector behind the glove box assembly.

CAUTION: With the “SRS” 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

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 section.

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

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 “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 SDM should not be used if they

have been dropped from a height of 100 cm (3.3 feet)
or more.

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

arrow on the SDM 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 replacements. 

Inspections Required After An Accident

CAUTION: Certain SRS components must be
replaced after a frontal crash involving air bag
deployment.
In all types of accidents regardless of “Air Bag”
deployment, visually inspect all of the following
components and replace as required:
— Driver air bag assembly
— Passenger air bag assembly
— Steering wheel
— SRS coil assembly
— Steering column
— Knee bolster and instrument panel mounting

attachments

— Driver seat and belt
— Passenger seat and belt
— SDM
Be sure to replace Sensing and Diagnostic Module (SDM)
in accordance with “SDM Replacement Guidelines”. The
SDM can be reused if the airbag did not deploy and it falls
in the criteria described in this workshop manual.

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