Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 513

SUPPLEMENTAL RESTRAINT SYSTEM

9J–35

Installation

1. Install the steering column assembly (13) and align

the setting marks on the universal joint and steering
shaft made during removal.

2. Tighten the steering column fixing bolts (dash panel

side) to the specified torque.

Torque: 20 N·m (14 lb ft)

3. Tighten the steering column fixing nuts (Cross beam)

to the specified torque.

Torque: 20 N·m (14 lb ft)

4. Tighten the universal joint to the specified  torque.

Torque: 31 N·m (23 lb ft)

5. Install steering lock cylinder assembly (11).
6. Connect shift lock cable (For A/T)
7. Install cushion rubber.
8. Install snap ring.
9. Install the combination switch assembly with SRS coil

(9).

10. Connect the wiring harness connector (10) located on

the base of steering column.

11. Turn the SRS coil clockwise to full, return about 3

turns and align the neutral mark.

CAUTION: When turning the SRS coil clockwise to
full, stop turning if resistance is felt. Further forced
turning may damage the cable in the SRS coil.

12. Install steering column cover (1).

CAUTION: When installing the steering column
cover, be sure to wire (through each harness) as
illustrated so that the harnesses starter switch,
combination switch and SRS coil may not catch
wiring.

13. Install the steering wheel (2) and align the setting

marks (6).

14. Tighten the steering wheel fixing nut (3) to the

specified torque.

Torque: 34 N·m (25 lb ft)

15. Connect horn lead (8).
16. Connect air Bag wiring harness connector (7).

NOTE: Pass the lead wire through the tabs on the plastic
cover (wire protector) of air bag to prevent lead wire from
being pinched.

17. Install air bag into steering wheel and tighten bolts (5)

to specified sequence as shown in figure.

Torque: 8.8 N·m (78 lb in)

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 as follows.
Light blue color for driver air bag assembly.
Light blue color for passenger air bag assembly.
Use only the air bag assembly for “UP”.

431R200004

18. Enable the SRS (Refer to “Enabling The SRS” in this

section.)

SUPPLEMENTAL RESTRAINT SYSTEM

9J–36

Passenger Air Bag Assembly

Service Precaution

WARNING: SAFETY PRECAUTIONS MUST BE
FOLLOWED WHEN HANDLING A DEPLOYED AIR
BAG ASSEMBLY. AFTER DEPLOYMENT, THE AIR
BAG ASSEMBLY SURFACE MAY CONTAIN A SMALL
AMOUNT OF SODIUM HYDROXIDE, A BY–PRODUCT
OF THE DEPLOYMENT REACTION, THAT IS
IRRITATING TO THE SKIN AND EYES. MOST OF THE
POWDER ON THE AIR BAG ASSEMBLY IS
HARMLESS. 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.

WARNING: WHEN CARRYING A LIVE AIR BAG
ASSEMBLY, MAKE SURE THE BAG AND TRIM
COVER ARE POINTED AWAY FROM YOU. NEVER
CARRY AIR BAG ASSEMBLY BY THE WIRES OR
CONNECTOR ON THE UNDERSIDE OF MODULE. IN
THE CASE OF AN ACCIDENTAL DEPLOYMENT, 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 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.
OTHERWISE, PERSONAL INJURY COULD RESULT.

NOTE: In the event deployment has occurred, inspect
coil assembly wire for any signs of scorching, melting or
any other damage due to excessive heat. If the coil has
been damaged, replace it.

Removal

1. Disable the SRS. (Refer to “Disabling the SRS” in this

section.)

2. Remove glove box assembly.
3. Disconnect passenger air bag assembly harness

connector.

4. Remove air bag assembly fixing bolts and nuts.

5. Remove passenger air bag assembly from glove box

opening of instrument panel.

827RY00001

Legend

(1) Passenger Air Bag Door
(2) Passenger Air Bag Assembly
(3) Passenger Air Bag Harness
(4) Cross Beam

Installation

1. Install passenger air bag assembly from glove box

opening of instrument panel.

2. Install air bag assembly fixing nuts and bolts, and

tighten to specified torque.

Torque: 7.8 N·m (69 lb in)

3. Connect air bag assembly harness connector.
4. Install glove box assembly.
5. Enable the SRS (Refer to “Enabling the SRS” in this

section.)

9J1–1

RESTRAINT CONTROL SYSTEM

AXIOM

RESTRAINTS

SRS CONTROL SYSTEM

CONTENTS

Service Precaution

9J1–1

. . . . . . . . . . . . . . . . . . . . . . 

Diagnostic Information

9J1–2

. . . . . . . . . . . . . . . . . . . 

Diagnostic Procedures

9J1–2

. . . . . . . . . . . . . . . . . 

Diagnostic Codes

9J1–2

. . . . . . . . . . . . . . . . . . . . . . 

How To Read Trouble Codes

9J1–2

. . . . . . . . . . . . 

How To Clear Trouble Codes

9J1–2

. . . . . . . . . . . . 

Scan Tool Diagnostics

9J1–2

. . . . . . . . . . . . . . . . . . 

Basic Knowledge Required

9J1–2

. . . . . . . . . . . . . 

Basic Electrical Circuits

9J1–2

. . . . . . . . . . . . . . . . . 

“Flash Code” Diagnostics

9J1–3

. . . . . . . . . . . . . . . 

System Schematic

9J1–3

. . . . . . . . . . . . . . . . . . . . . . 

SRS Diagnostic System Check

9J1–4

. . . . . . . . . . . . 

Circuit Description

9J1–4

. . . . . . . . . . . . . . . . . . . . . 

Notes On System Check Chart:

9J1–4

. . . . . . . . . 

Diagnostic Aids:

9J1–4

. . . . . . . . . . . . . . . . . . . . . . . 

Chart A  SDM Integrity Check

9J1–6

. . . . . . . . . . . . . 

Chart B “AIR BAG” Warning Lamp Comes
 “ON” Steady

9J1–8

. . . . . . . . . . . . . . . . . . . . . . . . . . . 

Chart C  “AIR BAG” Warning Lamp Does
 Not Comes “ON” Steady

9J1–10

. . . . . . . . . . . . . . . . . 

DTC 15  Passenger Deployment Loop
 Resistance High

9J1–13

. . . . . . . . . . . . . . . . . . . . . . . . 

DTC 16  Passenger Deployment Loop
 Resistance Low

9J1–16

. . . . . . . . . . . . . . . . . . . . . . . . 

DTC 17  Passenger Deployment Loop Open

9J1–19

DTC 18  Passenger Deployment Loop
 Short To Ground

9J1–21

. . . . . . . . . . . . . . . . . . . . . . . . 

DTC 19  Passenger Deployment Loop
 Short To Voltage

9J1–23

. . . . . . . . . . . . . . . . . . . . . . . . 

DTC 21  Driver Deployment Loop
 Resistance High

9J1–25

. . . . . . . . . . . . . . . . . . . . . . . . 

DTC 22  Driver Deployment Loop
 Resistance Low

9J1–28

. . . . . . . . . . . . . . . . . . . . . . . . 

DTC 24  Driver Deployment Loop
 Short To Ground

9J1–31

. . . . . . . . . . . . . . . . . . . . . . . . 

DTC 25  Driver Deployment Loop
 Short To Voltage

9J1–33

. . . . . . . . . . . . . . . . . . . . . . . . 

DTC 26  Driver Deployment Loop Open

9J1–36

. . . . 

DTC 51  Deployment Event Commanded

9J1–39

. . . 

DTC 53  Deployment Commanded With
 Deployment Loop Fault Or Energy
 Reserves Out Of Range

9J1–41

. . . . . . . . . . . . . . . . . 

DTC 61  Warning Lamp Circuit Failure

9J1–43

. . . . . 

DTC 71  Internal SDM Fault

9J1–45

. . . . . . . . . . . . . . 

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
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.

SECTION

RESTRAINT CONTROL SYSTEM

9J1–2

Diagnostic Information

Diagnostic Procedures

WARNING: WHEN FASTENERS ARE REMOVED,
ALWAYS REINSTALL THEN 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: 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
NONPOWERED, PROBE–TYPE TESTER.
INSTRUCTIONS IN THIS MANUAL MUST BE
FOLLOWED CAREFULLY, OTHERWISE PERSONAL
INJURY MAY RESULT.

The diagnostic procedures used in this section are
designed to aid in finding and repairing SRS problems.
Outlined below are the steps to find and repair SRS
problems quickly and effectively.  Failure to carefully
follow these procedures may result in extended
diagnostic time, incorrect diagnosis and incorrect parts
Replacement.

1. Perform The “SRS Diagnostic System Check.”

The “SRS Diagnostic System Check” should always be
the starting point of any SRS diagnostics.  The “SRS
Diagnostic System Check” checks for proper “AIR BAG”
warning lamp operation and checks for SRS trouble
codes using both “Flash Code” and “Scan Tool” Methods.

2. Refer To The Proper Diagnostic Chart As Directed

By The “SRS Diagnostic System Check.”

The “SRS Diagnostic System Check” will lead you to the
correct chart to diagnose any SRS problems.  Bypassing
these procedures may result in extended diagnostic time,
incorrect diagnosis and incorrect parts Replacement.

3. Repeat the “SRS Diagnostic System Check” After

Any Repair Or Diagnostic Procedures Have Been
Performed.

Performing the “SRS Diagnostic System Check” after all
repair or diagnostic procedures will assure that the repair
has been made correctly and that no other conditions
exist.

Diagnostic Codes

The Sensing and Diagnostic Module (SDM) maintains a
history record of all diagnostic codes that have been
detected since the SRS codes were last cleared during
service.

1. Active Codes—Faults that are presently detected this

ignition cycle.  Active codes are stored in RAM
(Random Access Memory).

2. History Codes—All faults detected since the last time

the history fault memory was cleared.  History codes
are stored in EEPROM. (Electronically Erasable
Programmable Read only Memory) 

How To Read Trouble Codes

All codes (Active and history) can be read (or cleared) by
using a scan tool or equivalent.
If a DTC is not available, have the vehicle serviced by
dealer.

How To Clear Trouble Codes

Trouble codes can only be cleared by using a scan tool.  If
a scan tool is not available then inform the owner of the
stored codes and suggest that the codes are cleared
upon the next visit to a dealership.

Scan Tool Diagnostics

A scan tool can be used to read current and history codes
and to clear all history codes after a repair is complete.
The scan tool must be updated to communicate with the
SRS through a replaceable cartridge for SRS
diagnostics.  To use the scan tool, connect it to the DLC
and turn the ignition switch “ON”.  Then follow the
manufacturer’s directions for communication with the
SRS.  The scan tool reads serial data from the SDM
“Serial Data” output (terminal 24) to the DLC.

Basic Knowledge Required

Before using this section of the Service Manual, there is
some basic knowledge which will be required.  Without
this knowledge, you will have trouble using the diagnostic
procedures in this section.  Use care to prevent harm or
unwanted deployment.  Read all cautions in the service
manual and on warning labels attached to SRS
components.

Basic Electrical Circuits

You should understand the basic theory of electricity
including series and parallel circuits, and understand the
voltage drops across series resistors.  You should know
the meaning of voltage (volts), current (amps), and
resistance (ohms).  You should understand what happens
in a circuit with an open or a shorted wire.  You should be
able to read and understand a wiring diagram.