Isuzu TF 2006, TF 2007, TF 2005 Workshop Manual

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Page 1

WORKSHOP MANUAL

TF SERIES

ACCESSORIES

RESTRAINTS

SECTION 9

Page 2

Page 3

ACCESSORIES 9-1

SECTION 9

ACCESSORIES

TABLE OF CONTENTS

PAGE

Parts Location ...................................................................................................................9-2

Circuit Diagram .................................................................................................................9-6

Connector List ..................................................................................................................9-10

Radio ..................................................................................................................................9-12

Front Speaker .................................................................................................................... 9-13

Tweeter ..............................................................................................................................9-14

Rear Speaker (Extend Cab)...............................................................................................9-15

Rear Speaker (Crew Cab)..................................................................................................9-16

Clock................................................................................................................................... 9-17

Antenna .............................................................................................................................9-18

Page 4

9-2 ACCESSORIES

RHD

PARTS LOCATION

RTW48AXF 020001

Page 5

RHD

ACCESSORIES 9-3

RTW48AXF 020101

Page 6

9-4 ACCESSORIES

LHD

PARTS LOCATION

RTW48AXF 020201

Page 7

LHD

ACCESSORIES 9-5

RTW48AXF 020301

Page 8

9-6 ACCESSORIES

RHD

CIRCUIT DIAGRAM

RTW48AXF 011101

Page 9

ACCESSORIES 9-7

RTW48AXF 011201

Page 10

9-8 ACCESSORIES

LHD

RTW48AXF 010901

Page 11

ACCESSORIES 9-9

RTW48AXF 011001

Page 12

9-10 ACCESSORIES

CONNECTOR LIST

No. Connector face No. Connector face

B-10

B-56

White

B-14

Gray

B-20

White

B-21

White

B-22

Black

B-40

Clock

Audio

Cigar lighter illumination

Cigar lighter

White

B-62

White

B-64

Silver

B-65

Silver

B-73

Silver

C-2

J/B I4

Ignition switch

Weld splice 1

Weld splice 2

Weld splice 3

Black

B-41

Natural

B-42

White

B-43

B-55

White

Acc socket relay

Acc socket

Anti theft control unit

J/B I3

Black

C-108

White

C-109

Black

D-3

Black

D-8

Black

Engine room –RH ground

J/B E1

Body –LH ground

Front speaker -RH

Front speaker -LH

Page 13

No. Connector face No. Connector face

D-13

H-25

ACCESSORIES 9-11

Black

D-17

Black

D-19

White

D-21

White

D-22

White

H-6

Rear speaker -LH

Rear speaker -RH

Remote mirror switch drive side

Tweeter -RH

Tweeter -LH

Black

H-27

Black

P-1

Silver

P-2

Silver

P-5

Silver

P-6

INST ! Front door -LH

INST ! Rear body

Battery (+)

Relay " Fuse box

Battery (-)

White

H-14

White

H-16

White

H-18

White

H-24

Black

Engine room ! INST

Rear body ! Rear door -LH

Rear body ! Rear door -RH

Engine room ! INST

INST ! Front door -RH

Silver

Black

P-10

R-7

R-8

Body earth

Engine ground

Rear speaker -LH

Rear speaker -RH

Page 14

9-12 ACCESSORIES

RADIO

REMOVAL AND INSTALLATION

RTW48AMF000201

Removal

1. Remove the ash try

2. Remove the HVAC control

3. Remove the 2 crews unit on the HVAC

4. Remove the center cluster cover assembly

5. Remove the ash try bracket

6. Disconnect the connector for Audio

8. Remove the 4 screws on the radio

8. Disconnect the Antenna feeder plug

9. Pull out the radio

Installation

To install, follow the removal steps in the reverse order.

Page 15

ACCESSORIES 9-13

FRONT SPEAKER

REMOVAL AND INSTALLATION

Removal

1. Remove the Door Trim Panel

Refer to section 10 “FRONT DOOR ASSEMBLY” fo

door trim panel removal steps.

2. Remove the Front Speaker

Remove the screw.

Disconnect the connector.

Installation

To install, follow the removal steps in the reverse order.

Page 16

9-14 ACCESSORIES

TWEETER

REMOVAL AND INSTALLATION

Removal

1. Remove the Door Trim Panel

Refer to section 10 “FRONT DOOR ASSEMBLY” fo

door trim panel removal steps.

2. Remove the Tweeter

Remove the three screws.

Disconnect the connector.

RTW390SH00 0101

Installation

To install, follow the removal steps in the reverse order.

Page 17

ACCESSORIES 9-15

REAR SPEAKER (EXTEND CAB)

REMOVAL AND INSTALLATION

Removal

1. Remove the Speaker Grille

Pull the grille to release the locks.

2. Remove the Rear Speaker

Remove the three screws.

Disconnect the connector.

Installation

To install, follow the removal steps in the reverse order.

Page 18

9-16 ACCESSORIES

REAR SPEAKER (CREW CAB)

REMOVAL AND INSTALLATION

Removal

1. Remove the Rear Door Trim Panel

Refer to section 10 “REAR DOOR ASSEMBLY” for doo

trim panel removal steps.

2. Remove the Rear Speaker

Remove the screw.

Disconnect the connector.

RTW390M H000101

Installation

To install, follow the removal steps in the reverse order.

Page 19

ACCESSORIES 9-17

CLOCK

REMOVAL AND INSTALLATION

Removal

1. Remove the center cluster ASM

2. Disconnect the connector.

3. Remove the clock.

Installation

To install, follow the removal steps in the reverse order.

Page 20

9-18 ACCESSORIES

ANTENNA

REMOVAL AND INSTALLATION

Removal

1. Remove the antenna screw 1.

2. Disconnect the feeder cable

3. Remove the antenna cable

4. Pull out antenna downward.

Remove and install the antenna as illustrated. Antenna unit is located on the roof panel driver side. To install, follow the removal steps in the reverse order.

Installation

To install, follow the removal steps in the reverse order.

connector.

Page 21

SUPPLEMENTAL RESTRAINT SYSTEM 9A-1

RESTRAINTS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

SERVICING

PAGE

Service Precaution ............................................................................................................9A- 3

General Description......................................................................................................9A- 4

Restraint Devices .....................................................................................................9A- 4

System Description .................................................................................................. 9A- 5

SRS Component And Wiring Location View............................................................... 9A- 6

Component Description ...............................................................................................9A- 8

SRS Control Unit ......................................................................................................9A- 8

"Air Bag" Warning Lamp..........................................................................................9A- 8

SRS Coil Assembly...................................................................................................9A- 9

Air Bag Assemblies..................................................................................................9A- 9

Seat Belt with Pretensioner (If so equipped) .........................................................9A- 10

Steering Column.......................................................................................................9A- 10

Knee Bolster .............................................................................................................9A- 10

Definitions......................................................................................................................9A- 10

Diagnosis.......................................................................................................................9A- 12

Diagnostic Trouble Codes .......................................................................................9A- 12

Scan Tool Diagnostics.............................................................................................9A- 12

Use Of Special Tools................................................................................................9A- 12

SRS Connector Body Face Views................................................................................9A- 13

Repairs And Inspections Required After An Accident...............................................9A- 14

Accident With Deployment-Component Replacement And Inspections .............9A- 14

Accident With or Without Deployment-Component Inspection ...........................9A- 14

SRS Control Unit Replacement Guidelines............................................................ 9A- 14

Wiring Damage .........................................................................................................9A- 14

SRS Connector (Plastic Body And Terminal Metal Pin) Damage .........................9A- 14

SRS Wire Pigtail Damage.........................................................................................9A- 14

Page 22

9A-2 SUPPLEMENTAL RESTRAINT SYSTEM

PAGE

On-Vehicle Service........................................................................................................9A- 15

Service Precaution ...................................................................................................9A- 15

Disable The SRS.......................................................................................................9A- 15

Enabling The SRS.....................................................................................................9A- 15

Handling / Installation / Diagnosis ..........................................................................9A- 15

Air Bag Assembly Handling / Shipping / Scrapping...................................................9A- 16

Live (Undeployed) Air Bag Assembly .....................................................................9A- 16

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

Assemblies .................................................................................................................9A- 16

Deployed Air Bag Assembly (Driver Side).............................................................. 9A- 16

Air Bag Assembly Scrapping Procedure................................................................ 9A- 17

Deployment Outside Vehicle (Driver Air Bag Assembly) ......................................9A- 17

Deployment Outside Vehicle (Passenger Air Bag Assembly) ..............................9A- 20

Deployment Inside Vehicle (Vehicle Scrapping Procedure).................................9A- 22

Deployed Air Bag Assembly Handling....................................................................9A- 25

Tech2 Scan Tool............................................................................................................9A- 26

Getting Started..........................................................................................................9A- 26

Service Precautions for SRS Component Service .....................................................9A- 27

Disabling The SRS....................................................................................................9A- 27

Enabling The SRS.....................................................................................................9A- 27

Handling / Installation / Diagnosis ..........................................................................9A- 27

Inspections Required After An Accident ................................................................9A- 27

SRS Connectors ................................................................................................................9A- 28

Removal .........................................................................................................................9A- 28

Installation .....................................................................................................................9A- 29

SRS Control Unit................................................................................................................9A- 30

Service Precautions......................................................................................................9A- 30

Removal .........................................................................................................................9A- 30

Installation .....................................................................................................................9A- 30

Driver Air Bag Assembly...................................................................................................9A- 32

Service Precautions......................................................................................................9A- 32

Removal .........................................................................................................................9A- 32

Installation .....................................................................................................................9A- 33

Page 23

SUPPLEMENTAL RESTRAINT SYSTEM 9A-3

PAGE

Steering Wheel...................................................................................................................9A- 35

Service Precautions......................................................................................................9A- 35

Removal .........................................................................................................................9A- 35

Installation .....................................................................................................................9A- 36

SRS Coil Assembly ............................................................................................................9A- 37

Service Precautions......................................................................................................9A- 37

Removal. ........................................................................................................................9A- 37

Installation. ....................................................................................................................9A- 38

Steering Column ................................................................................................................9A- 40

Service Precautions......................................................................................................9A- 40

Removal .........................................................................................................................9A- 40

Installation .....................................................................................................................9A- 41

Passenger Air Bag Assembly ...........................................................................................9A- 44

Service Precautions......................................................................................................9A- 44

Removal .........................................................................................................................9A- 44

Installation .....................................................................................................................9A- 45

Pretensioner Seat Belt (If so quipped).............................................................................9A- 46

Removal .........................................................................................................................9A- 46

Installation .....................................................................................................................9A- 46

Main Data and Specifications ...........................................................................................9A- 47

Fastener Tightening Specification...............................................................................9A- 47

Special Tools......................................................................................................................9A- 48

5-8840-2421-0 SRS Driver/Passenger Load Tool........................................................9A- 48

5-8840-0285-0 DVM........................................................................................................9A- 48

Scan Tool.......................................................................................................................9A- 48

5-8840-0385-0 Connector Test Adapter Kit .................................................................9A- 49

5-8840-2468-0 SRS Deployment Tool ..........................................................................9A- 49

5-8840-2420-0 SRS Deployment Fixture......................................................................9A- 49

5-8840-2796-0 SRS Adapter for Load Tool..................................................................9A- 49

5-8840-2795-0 SRS Adapter for Deployment Tool......................................................9A- 50

5-8521-0016-0 Steering Wheel remover ......................................................................9A- 50

Page 24

9A-4 SUPPLEMENTAL RESTRAINT SYSTEM

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, REFE 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, o 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.

General Description

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 fo that application. If the correct part numbe 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.

Restraint Devices

Legent

(1) Deployed Air Bag (2) Knee Bolster (3) Seat Belt

The Supplemental Restraint System (SRS) helps supplement the protection offered by the driver and front passenger seat belts by deploying an air bag from the center of the steering wheel and from the front of the passenger side of the instrument panel.

The air bag deploys when the vehicle is involved in a frontal crash of sufficient force up to 30 degrees off the centerline of the vehicle. To further absorb the crash energy there is a knee bolster located beneath the instrument panel for both the driver and passenger, and the steering column is collapsible.

827RW006

827RW005

Page 25

SUPPLEMENTAL RESTRAINT SYSTEM 9A-5

System Description

The SRS consists of the SRS control unit, the driver air bag assembly, the SRS coil assembly, the passenger air bag assembly and the “AIR BAG” warning lamp in the instrument cluster. The SRS control unit, SRS coil assembly (driver side only), driver air bag assembly, passenger air bag assembly and connector wire make up the deployment loops. The function of the deployment loops is to supply current through air bag assembly, which will cause deployment of the air bags in the event of a frontal crash of sufficient force, up to 30 degrees off the centerline of the vehicle. The air bag assemblies are

only supplied enough current to deploy when the SRS control unit detects vehicle velocity changes severe enough to warrant deployment.

The SRS control unit contains a sensing device which converts vehicle velocity change to an electrical signal. The electrical signal generated is processed by the SRS control unit and then compared to a value stored in memory. When the generated signal exceeds the stored value, the SRS control unit will cause current to flow through the air bag assembly deploying the air bags.

RTW49JLF00 0101

Page 26

9A-6 SUPPLEMENTAL RESTRAINT SYSTEM

SRS Component And Wiring Location View - RHD

RTW49JM F000301

Page 27

SUPPLEMENTAL RESTRAINT SYSTEM 9A-7

SRS Component And Wiring Location View - LHD

RTW49JM F000401

Page 28

9A-8 SUPPLEMENTAL RESTRAINT SYSTEM

Component Description

SRS Control Unit

WARNING: DURING SERVICE PROCEDURES, BE VERY CAREFUL WHEN HANDLING A SRS CONTROL UNIT NEVER STRIKE OR JAR THE SRS CONTORL UNIT. NEVER POWER UP THE SRS WHEN THE SRS CONTROL UNIT IS NOT RIGIDLY ATTACHED TO THE VEHICLE. ALL SRS CONTROL UNIT AND MOUNTING BRACKET FASTENERS MUST BE CAREFULLY TORQUED AND THE ARROW MUST BE POINTED TOWARD THE FRONT OF THE VEHICLE TO ENSURE PROPER OPERATION OF THE SRS. THE SRS CONTROL UNIT COULD BE ACTIVATED WHEN POWERED WHILE NOT RIGIDLY ATTACHED TO THE VEHICLE WHICH COULD CAUSE DEPLOYMENT AND RESULT IN PERSONAL INJURY.

The SRS control unit is designed to perform the following functions in the SRS:

1. Energy Reserve — The SRS control unit maintains 24–

olt Loop Reserve (24VLR) energy supply to provide deployment energy when ignition voltage is lost in a frontal crash.

2. Frontal Crash Detection — The SRS control uni monitors vehicle velocity changes to detect frontal crashes which are severe enough to warran deployment.

3. Air Bag Deployment — When a frontal crash o sufficient force is detected, the SRS control uni will cause enough current to flow through the ai bag assembly to deploy the air bag.

4. Malfunction Detection — The SRS control unit performs diagnostic monitoring of SRS electrical components and sets a diagnostic trouble code when a malfunction is detected.

5. Frontal Crash Recording — The SRS control uni records information regarding SRS status during frontal crash.

6. Malfunction Diagnosis — The SRS control uni displays SRS diagnostic trouble codes and system status information through the use of a scan tool.

7. Driver Notification — The SRS control unit warns the vehicle driver of SRS malfunctions b controlling the “Air Bag” warning lamp.

The SRS control unit is connected to the SRS wiring harness by a 52–pin connector. This harness connector uses a shorting clip across certain terminals in the contact area. This shorting clip connects the “AIR BAG” warning lamp to ground when the SRS control unit harness connector is disconnected or CPA (Connector Position Assurance) is not inserted even if completely connected. This will cause the “AIR BAG” warning lamp to come “ON” steady whenever the ignition switch is at the ON or START positions with the SRS control unit disconnected.

Legent

(1) SRS Control Unit (2) SRS Harness (3) Connector Position Assurance

“Air Bag” Warning Lamp

Ignition voltage is applied to the “AIR BAG” warning lamp when the ignition switch is at the ON or START positions. The SRS control unit controls the lamp by providing ground with a lamp driver. The “AIR BAG” warning lamp is used in the SRS to do the following:

erify lamp and SRS control unit operation by

1. flashing SEVEN (7) times when the ignition switch is first turned “ON”.

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 “AIR BAG “ warning lamp is the key to driver notification of SRS malfunctions. For proper lamp operation, refer to the “SRS Diagnostic System Check” in this section.

060R300008

Page 29

060R300007

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 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 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 9A-9

Air Bag Assemblies

The air bag assembly consist of an inflatable air bag assembly and an inflator. When the vehicle is in a frontal crash of sufficient force.

The SRS control unit causes current flow through the deployment loops. Current passing through the inflator ignites the material in the air bag assembly. The gas produced from this reaction rapidly inflates the air bag assembly.

There is a shorting clip on the driver air bag assembly connector which connects the SRS coil assembly. The shorting clip shorts across the driver air bag assembly circuits when driver air bag assembly 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 driver air bag assembly, the steering column or other SRS components.

060R300012

There is a shorting clip on the passenger air bag assembly connector which connects to the SRS harness. The shorting clip shorts across the passenger air bag assembly circuit when the passenger air bag assembly connector is disconnected. The circuit to the passenger air bag assembly is shorted in this way to help prevent unwanted deployment of the air bag when servicing the passenger air bag assembly, the instrument panel or other SRS components.

060R300047

Page 30

9A-10 SUPPLEMENTAL RESTRAINT SYSTEM

060R300013

Seat Belt with Pretensioner (If so equipped)

The seat belt comprises a seat belt and a cylinder (a cylinder filled with powder and an ignition device). In cases of frontal collision which cause a shock exceeding a specified level, the controller lets current flow to the inflation circuit. The current ignites the cylinder of the seat belt, producing gas. The gas helps tighten the seat belt to restrain firmly the driver’s upper half in his seat.

Steering Column

The steering column absorbs energy and is designed to compress in a frontal crash to decrease the chance of injury to the driver.

Knee Bolster

The knee bolsters are used to absorb energy to protect knees and control the forward movement of the vehicle's front seat occupants during a frontal crash, by limiting leg movement.

Definitions

Air Bag

An inflatable cloth cushion designed to deploy in certain frontal crashes. It supplements the protection offered by the seat belts by distributing the impact load more evenly over the vehicle occupant's head and torso.

060R300038

Asynchronous

Performed in a nonperiodic fashion, (i.e., no defined time or interval).

B+

Battery voltage, (B+) The voltage available at the battery at the time of the indicated measurement. With the key “ON” and the engine not running, the

RTW49JSH000201

system voltage will likely be between 12 and 12.5 volts. At idle, the voltage may be 14 to 16 volts. The voltage could be as low as 10 volts during engine cranking.

Bulb Check

The SRS control unit will cause the “AIR BAG” warning lamp to flash seven times and then go “OFF” whenever the ignition switch transitions to the ON position from any other ignition switch position and no malfunctions are detected.

Page 31

SUPPLEMENTAL RESTRAINT SYSTEM 9A-11

“Continuous Monitoring”

Tests performed by the SRS control unit on the SRS every 100 milliseconds while “Ignition 1” voltage is in the normal operating voltage range at the SRS control unit.

Data Link Connector (DLC)

Formerly “DLC” a connector which allows communication with an external computer, such as a scan tool.

Datum Line

A base line parallel to the plane of the underbody or frame from which all vertical measurements originate.

Deploy

To inflate the air bag.

Deployment Loops

The circuits which supply current to the air bag assemblies to deploy the air bag.

Diagnostic Trouble Code (DTC)

Formerly “Code”, a numerical designator used by the SRS control unit to indicate specific SRS malfunctions.

Driver Current Source

n output of the SRS control unit which applies current into the driver air bag assembly circuit during the “Initiator Assembly Resistance Test”.

“Initiator Assembly Resistance Test”

Tests performed once each ignition cycle when no malfunctions are detected during “Turn–ON” or “Continuous Monitoring”. This test checks for the correct SRS control unit configuration for the vehicle, shorts to “Ignition 1” in the deployment loops, high resistance or opens in the “Driver Side” and “Passenger Side” 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 SRS control unit “Ignition 1” terminals and “Ground” terminals is between 9 and 16 volts.

Passenger Current Source

n output of the SRS control unit which applies current into the passenger air bag assembly circuit during the “Initiator Assembly Resistance Test”.

Passenger Air Bag Assembly

An assembly located in the front of the passenger 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.

SRS control unit

SRS control unit 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.

“Turn–ON”

Test which the SRS control unit performs on the SRS once during each ignition cycle immediately after “Ignition 1” voltage is applied to the SRS control unit and before “Continuous Monitoring”.

Page 32

9A-12 SUPPLEMENTAL RESTRAINT SYSTEM

Diagnosis

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.

Diagnostic Trouble Codes

The “SRS Diagnostic System Check” must always be the starting point of any SRS diagnosis. The “SRS Diagnostic System Check” checks for proper “AIR BAG” 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. Curren diagnostic trouble codes are stored in RAM (Random Access Memory).

2. History diagnostic trouble codes – All malfunctions detected since the last time the history memor 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 “ON”. The scan tool reads serial data from the SRS control unit “Serial Data” line terminal “21” to the data link connector terminal “2”.

Use Of Special Tools

WARNING: TO AVOID DEPLOYMENT WHEN TROUBLESHOOTING THE SRS, DO NOT USE ELECTRICAL TEST EQUIPMENT SUCH AS A BATTERY–POWERED OR AC–POWERED

OLTMETER, 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.

Page 33

SRS Connector Body Face Views

SUPPLEMENTAL RESTRAINT SYSTEM 9A-13

Legend

(1) SRS control unit (2) Driver Air Bag Assembly (3) Passenger Air Bag Assembly

(4) “Air Bag” Warning Lamp (5) DLC (6) Pretensioner Seat Belt

RTW49JM F000201

Page 34

9A-14 SUPPLEMENTAL RESTRAINT SYSTEM

Repairs And Inspections Required After An Accident

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 fo SRS repairs.

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

•

erify the part number of replacement air bag

assembly.

CAUTION: Never use the air bag assembly from another vehicle and difference model year air bag assembly.

Use only new air bag assembly proper to the TFR/S 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 SRS control unit, air bag assembly and dimensional inspection of the steering column. Any visible damage to the SRS control unit mounting bracket (s) requires replacement, and the steering column must be dimensionally inspected, whethe 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

• SRS control unit

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

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 fo

any distortion, bending, cracking, or other damage.

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

SRS Control Unit Replacement Guidelines

SRS control unit replacement policy requires replacement of SRS control unit, 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.

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

Page 35

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 SRS control unit 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 SRS control unit 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 “SRS”, from the side of the

driver side of instrument panel fuse block o disconnect battery.

2. Disconnect yellow connector at the base o

steering column.

3. Remove glove box assembly, refer to “Passenge

Air Bag Assembly Replacement” in this manual.

4. Disconnect yellow 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.

SUPPLEMENTAL RESTRAINT SYSTEM 9A-15

Enabling The SRS

Installation CAUTION: Never use the air bag assembly from

another vehicle and difference model year air bag assembly.

Use only new air bag assembly proper to the TFR/S which is being repaired.

Turn ignition switch to “LOCK” and remove key.

1. Connect yellow connector passenger air bag assembly.

2. Install glove box assembly. Refer to “Passenger ai bag assembly replacement” in this manual.

3. Connect yellow connector at the base of steering column.

4. Install “AIR BAG” fuse “SRS” to the side of the driver side of instrument panel fuse block o 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.

Handling / Installation / Diagnosis

1. Air bag assembly should not be subjected to temperatures above 65

2. Air bag assembly, and SRS control unit should not be used if they have been dropped from a height of 100 centimeters (3.28 feet) or more.

3. When a SRS control unit 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 SRS control unit to be located flat on the mounting surface, parallel to the vehicle datum line. It is important that the SRS control unit 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 ma result in extended diagnostic time, incorrect diagnosis, and incorrect parts replacement.

C (150!F).

Page 36

9A-16 SUPPLEMENTAL RESTRAINT SYSTEM

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.

060R300011

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.

Page 37

SUPPLEMENTAL RESTRAINT SYSTEM 9A-17

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.

WARNING: FAILURE TO FOLLOW PROPE SUPPLEMENTAL RESTRAINT SYSTEM (SRS) AI BAG ASSEMBLY DISPOSAL PROCEDURES CAN RESULT IN AIR BAG DEPLOYMENT WHICH MAY CAUSE PERSONAL INJURY. AN UNDEPLOYED 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 MANNE 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 5-8840-246806 SRS deployment harness with appropriate pigtail adapter. Do not attempt procedure without 5-88402468-0 adapter.

WARNING: FAILURE TO FOLLOW PROCEDURES IN THE ORDER LISTED MAY RESULT IN PERSONAL INJURY. NEVER CONNECT DEPLOYMENT HARNESS TO ANY POWE 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. WEA 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 fo information on passenger air bag assembly scrapping.

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

2. Inspect 5-8840-2468-0 SRS Deployment Harness and appropriate pigtail adapter for damage. I 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.

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.

827RS004

Page 38

9A-18 SUPPLEMENTAL RESTRAINT SYSTEM

WARNING: WHEN STORING A LIVE AIR BAG ASSEMBLY OR WHEN LEAVING A LIVE AIR BAG ASSEMBLY UNATTENDED ON A BENCH O 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.

6. Place the driver air bag assembly on a work bench or other surface away from all loose or flammable objects with its trim cover facing up, away from the surface.

060R300028

7. Clear a space on the ground about 183 cm (six feet) in diameter where the driver air bag assembl is to be deployed. A paved, outdoor location where there is no activity is preferred. If an outdoor location is not available, a space on the shop floor where there is no activity and sufficien ventilation is recommended. Ensure no loose o flammable objects are within the deployment area.

8. Place the driver air bag assembly, with its trim cover facing up, on the ground in the space just cleared.

9. Stretch the SRS deployment harness and pigtail adapter from the driver air bag assembly to its full length.

1 0 . P l a c e a p o w e r s o u r c e n e a r t h e s h o r t e d e n d o f t h e

SRS deployment harness. Recommended application: 12 volts minimum, 2 amps minimum. A vehicle battery is suggested.

11. Connect the driver air bag assembly to the pigtail adapter on the SRS deployment harness. Deployment harness shall remain shorted and not be connected to a power source until the air bag is to be deployed. The driver air bag assembly will immediately deploy the air bag when a powe source is connected to it.

NOTE: Ensure that the pigtail adapter is firmly seated into the driver air bag assembly connector. Failure to fully seat the connectors may leave the shorting ba located in the driver air bag assembly connecto functioning (shorted) and may result in nondeployment of the driver air bag assembly.

erify that the area around the driver air bag

1 2 .

assembly is clear of all people and loose o flammable objects.

1 3 .

erify that the driver air bag assembly is resting

with its trim cover facing up.

1 4 . N o t i f y a l l p e o p l e i n t h e i m m e d i a t e a r e a t h a t y o u

intend to deploy the driver air bag. The deployment will be accompanied by a substantial noise which may startle the uninformed.

1 5 . S e p a r a t e t h e t w o b a n a n a p l u g s o n t h e S R S

deployment harness.

060R300029

Page 39

SUPPLEMENTAL RESTRAINT SYSTEM 9A-19

NOTE: When the air bag deploys, the driver air bag assembly may jump about 30 cm (one foot) vertically. This is a normal reaction of the driver air bag to the force of the rapid gas expansion inside the air bag.

NOTE: When the air bag deploys, the rapid gas expansion will create a substantial noise. Notify all people in the immediate area that you intend to deplo the driver air bag.

WARNING: 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. CONNECTING THE DEPLOYMENT HARNESS TO THE POWER SOURCE SHOULD ALWAYS BE THE LAST STEP IN THE AIR BAG ASSEMBLY DEPLOYMENT PROCEDURE. FAILURE TO FOLLOW PROCEDURES IN THE ORDER LISTED MAY RESULT IN PERSONAL INJURY.

16. Connect the SRS deployment harness wires to the power source to immediately deploy the driver ai bag. Recommended application: 12 volts minimum, 2 amps minimum. A vehicle battery is suggested.

17. Disconnect the SRS deployment harness from the power source.

1 8 . S h o r t t h e t w o S R S d e p l o y m e n t h a r n e s s l e a d s

together by fully seating one banana plug into the other.

19. In the unlikely event that the driver air bag assembly did not deploy after following these procedures, proceed immediately with Steps 24 through 26. If 19. the driver air bag assembly did deploy, proceed with Steps 20 through 23.

20. 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 driver air bag assembly. After the air bag assembl has been deployed, the surface of the air bag ma contain a powdery residue. This power 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 the atmospheric moisture and is converted to sodium carbonate and sodium bicarbonate (baking soda). Therefore, it is unlikel that sodium hydroxide will be present after deployment.

WARNING: SAFETY PRECAUTIONS MUST BE OBSERVED WHEN HANDING A DEPLOYED AI BAG ASSEMBLY. AFTER DEPLOYMENT, THE METAL SURFACES OF THE AIR BAG ASSEMBLY

ILL BE VERY HOT. ALLOW THE INFLATOR MODULE TO COOL BEFORE HANDLING ANY METAL PORTION OF IT. DO NOT PLACE THE DEPLOYED AIR BAG ASSEMBLY NEAR ANY FLAMMABLE OBJECTS. FAILURE TO FOLLOW PROCEDURES MAY RESULT IN FIRE O PERSONAL INJURY.

FTER A DRIVER AIR BAG ASSEMBLY HAS BEEN DEPLOYED, THE METAL CANISTER AND SURROUNDING AREAS OF THE DRIVER AIR BAG

SSEMBLY WILL BE VERY HOT. DO NOT TOUCH THE METAL AREAS OF THE DRIVER AIR BAG

SSEMBLY FOR ABOUT TEN MINUTES AFTER DEPLOYMENT. IF THE DEPLOYED DRIVER AI BAG ASSEMBLY MUST BE MOVED BEFORE IT IS COOL, WEAR GLOVES AND HANDLE BY THE AI BAG OR TRIM COVER.

2 1 . D i s c o n n e c t t h e p i g t a i l a d a p t e r f r o m t h e d r i v e r a i

bag assembly as soon after deployment as possible. This will prevent damage to the pigtail adapter or SRS deployment harness due to possible contact with the hot driver air bag assembly canister. The pigtail adapter can be reused. They should, however, be inspected fo damage after each deployment and replaced i necessary.

22. Dispose of the deployed driver air bag assembl

through normal refuse channels after it has cooled for at least 30 minutes.

23. Wash your hands with mild soap and wate

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

24. Ensure that the SRS deployment harness has

been disconnected from the power source and that

its two banana plugs have been shorted togethe

by fully seating one banana plug into the other.

2 5 . D i s c o n n e c t t h e p i g t a i l a d a p t e r f r o m t h e d r i v e r a i

bag assembly.

WARNING: WHEN STORING A LIVE AIR BAG

SSEMBLY OR WHEN LEAVING A LIVE INFLATOR MODULE UNATTENDED ON A BENCH OR OTHER SURFACE, ALWAYS FACE THE BAG

ND TRIM COVER UP AND AWAY FROM THE SURFACE. THIS IS NECESSARY SO THAT A FREE SPACE IS PROVIDED TO ALLOW THE AI BAG TO EXPAND IN THE UNLIKELY EVENT OF

CCIDENTAL DEPLOYMENT. FAILURE TO FOLLOW PROCEDURES MAY RESULT IN PERSONAL INJURY.

Page 40

9A-20 SUPPLEMENTAL RESTRAINT SYSTEM

26. Temporarily store the driver air bag assembly with its trim cover facing up, away from the surface upon which it rests.

Deployment Outside Vehicle (Passenger Air Bag Assembly)

WARNING: FAILURE TO FOLLOW PROPER SRS AIR BAG ASSEMBLY DISPOSAL PROCEDURES CAN RESULT IN AIR BAG DEPLOYMENT WHICH MAY CAUSE PERSONAL INJURY. UNDEPLOYED AIR BAG ASSEMBLIES 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 MANNE INCONSISTENT WITH PROPER PROCEDURES MAY BE A VIOLATION OF FEDERAL, STATE AND/OR LOCAL LAWS.

Deployment out of the vehicle is proper when the vehicle is to be returned to service. This includes, for example, situations in which a functionally or cosmetically deficient air bag assembly is replaced. Deployment and disposal of an air bag assembly is, of course, subject to any required retention period.

For deployment of a live air bag assembly out of the vehicle, the deployment procedure must be followed exactly. Always wear safety glasses during this deployment procedure until the deployed air bag assembly is scrapped. Before performing the procedures, you should be familiar with servicing the SRS system and with proper handling of the air bag assembly. Procedures should be read fully before they are performed.

The following procedure requires use of 5-8840-24680 SRS Deployment Harness with the appropriate pigtail adapter. The procedure also requires the use of 5-8840-2420-0 Passenger Side SRS Module Deployment Fixture. Do not attempt this procedure without 5-8840-2468-0 and adapter, and 5-8840-2420-

WARNING: FAILURE TO FOLLOW PROCEDURES IN THE ORDER LISTED MAY RESULT IN PERSONAL INJURY. NEVER CONNECT DEPLOYMENT HARNESS TO ANY POWE SOURCE BEFORE CONNECTING DEPLOYMENT HARNESS TO THE 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. WEA SAFETY GLASSES THROUGHOUT THIS ENTIRE DEPLOYMENT AND DISPOSAL PROCEDURE.

NOTE: This information applies only to passenger ai bag assembly. Information for disposing of a live driver air bag assembly can be found in “Deployment Outside Vehicle” (Driver Air Bag Assembly) in this section.

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

2. Inspect 5-8840-2468-0 SRS Deployment Harness and appropriate pigtail adapter for damage. I harness or pigtail 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. The SRS Deployment Harness shall remain shorted and not be connected to a powe source until the air bag is to be deployed.

4. Connect the appropriate pigtail adapter to the SRS Deployment Harness

827RS003

827RS004

Page 41

5. Remove passenger air bag assembly from vehicle.

Refer to “Passenger Air Bag Assembly Removal “.

6. Clear a space on the ground approximately 183 cm (six feet) in diameter where the fixture with attached air bag assembly is to be placed fo deployment. A paved outdoor location where there is no activity is preferred. If an outdoo location is not available, a space on the shop floo where is no activity and sufficient ventilation is recommended. Ensure that no loose or flammable objects are within the deployment area.

7. Place the 5-8840-2420-0 on the bench vice. This is necessary to provide sufficient stabilization o the fixture during deployment.

8. Attach the passenger air bag assembly in the 58840-2420-0.

n air bag assembly must be mounted such that the bag will deploy upward. SECURELY HAND–TIGHTEN ALL FASTENERS PRIOR TO DEPLOYMENT.

SUPPLEMENTAL RESTRAINT SYSTEM 9A-21

NOTE: Ensure that the pigtail adapter is firmly seated into the air bag assembly connector. Failure to full seat the connectors may leave the shorting bar located in the air bag assembly connector functioning (shorting the deployment circuit) and may result in nondeployment of the air bag assembly.

1 2 .

erify that the area around the passenger air bag assembly is clear of all people and loose o flammable objects.

1 3 .

erify that the passenger air bag assembly is firmly and properly in 5-8840-2420-0.

14. Notify all people in the immediate area of you intention to deploy the passenger air bag assembly. The deployment will be accompanied by a substantial noise which may startle the uninformed.

1 5 . S e p a r a t e t h e t w o b a n a n a p l u g s o n t h e S R S

deployment harness.

901RW199

9. Stretch the SRS Deployment Harness and pigtail adapter from the air bag assembly to its full length.

10. Place a power source near the shorted end of the SRS deployment harness. (Recommended application: 12 volts minimum, 2 amps minimum. A vehicle battery is suggested.)

11. Connect the air bag assembly to the pigtail adapte on the SRS deployment harness. The SRS Deployment Harness shall remain shorted and no 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 powe source is connected to it.

NOTE: When the air bag deploys, the rapid gas expansion will create a substantial noise. Notify all people in the immediate area that you intend to deplo the air bag assembly.

WARNING: DEPLOYMENT HARNESS SHALL REMAIN SHORTED AND NOT BE CONNECTED TO

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. CONNECTING THE DEPLOYMENT HARNESS TO THE POWER SOURCE SHOULD ALWAYS BE THE LAST STEP IN THE AIR BAG ASSEMBLY DEPLOYMENT PROCEDURE. FAILURE TO FOLLOW PROCEDURES IN THE ORDER LISTED MAY RESULT IN PERSONAL INJURY.

16. Connect the SRS deployment harness wires to the

power source to immediately deploy the air bag assembly. Recommended application : 12 volts minimum, 2 amps minimum. A vehicle battery is suggested.

17. Disconnect the SRS deployment harness from the

power source.

18.Short the two SRS deployment harness leads

together by fully seating one banana plug into the other.

1 9 . I n t h e u n l i k e l y e v e n t t h a t t h e p a s s e n g e r a i r b a g

assembly did not deploy after following these procedures, proceed immediately with Steps 24 through 26. If the passenger air bag assembl deployed as intended, proceed with Steps 20 through 23.

Page 42

9A-22 SUPPLEMENTAL RESTRAINT SYSTEM

20.The passenger inflator requires no special precaution after deployment. 95% of the particulate emission are potassium ckloride (KLC), which is commonly sold as an edible saltsubstitutes. even if water is applied. Pos deployment products are relatively pH neutral. Disposing the inflator by burying it in a landfill will not produce any hazardous products. As with an dusty environment, safety goggles, dust mask and gloves should be worn.

WARNING: SAFETY PRECAUTIONS MUST BE OBSERVED WHEN HANDLING A DEPLOYED AI BAG ASSEMBLY. AFTER DEPLOYMENT, THE METAL SURFACES OF THE AIR BAG ASSEMBLY WILL BE HOT. ALLOW THE AIR BAG ASSEMBLY TO COOL BEFORE HANDLING ANY METAL PORTION OF IT. DO NOT PLACE THE DEPLOYED INFLATOR MODULE NEAR ANY FLAMMABLE OBJECTS. FAILURE TO FOLLOW PROCEDURES MAY 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 HOT. DO NOT TOUCH THE METAL AREAS OF THE AIR BAG ASSEMBLY FO ABOUT THIRTY MINUTES AFTER DEPLOYMENT. IF THE DEPLOYED AIR BAG ASSEMBLY MUST BE MOVED BEFORE IT IS COOL, WEAR GLOVES AND HANDLE BY THE AIR BAG ITSELF.

21. Disconnect the pigtail adapter from the air bag assembly as soon after deployment as possible to avoid damage to the pigtail adapter or SRS deployment harness from contacting the hot ai bag assembly canister. The pigtail adapter and SRS deployment harness are designed to be reused. They should, however, be inspected fo damage after each deployment and replaced i necessary.

22. Dispose of the deployed air bag assembly through normal refuse channels after it has cooled for a least 30 minutes.

23. Wash your hands with mild soap and wate afterward.

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

24. Ensure that the SRS deployment harness has been disconnected from the power source and tha its two banana plugs have been shorted togethe by fully seating one banana plug into the other.

25. Disconnect the pigtail adapter from the air bag assembly.

WARNING: WHEN STORING A LIVE AIR BAG

SSEMBLY OR WHEN LEAVING A LIVE AIR BAG SSEMBLY UNATTENDED ON A BENCH OR

OTHER SURFACE, ALWAYS FACE THE BAG UP

ND 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.

2 6 . T e m p o r a r i l y s t o r e t h e a i r b a g a s s e m b l y w i t h t h e

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

Deployment Inside Vehicle (Vehicle Scrapping Procedure)

Deployment inside vehicle is proper when the vehicle is to be destroyed or salvaged for component parts. This includes, but is not limited to, the following situations:

1. The vehicle has completed its useful life.

2. The vehicle has been damaged beyond repair in a

nondeployment type accident.

3. The vehicle has been stripped or damaged beyond

repair in a theft.

4. The vehicle will be salvaged for component parts

to be used on a vehicle with a different Vehicle Identification Number (VIN) as opposed to being rebuilt as same VIN. Never use SRS components from another vehicle.

WARNING: FAILURE TO FOLLOW PROPER SRS

IR BAG ASSEMBLY DISPOSAL PROCEDURES CAN RESULT IN AIR BAG DEPLOYMENT WHICH MAY CAUSE PERSONAL INJURY. UNDEPLOYED AIR B 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 MANNE INCONSISTENT WITH PROPER PROCEDURES MAY BE A VIOLATION OF FEDERAL, STATE AND/OR LOCAL LAWS.

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

2. Remove all loose objects from front seats.

3. Disconnect driver air bag assembly, yellow

4. Cut the driver air bag assembly yellow harness

G ASSEMBLIES MUST NOT BE DISPOSED

put on safety glasses.

connector located at the base of the steering column.

connector from the vehicle leaving at least 15 cm (six inches) of wire at the connector.

Page 43

5. Strip 13 mm (1/2 inch) of insulation from yellow –

green and yellow – black wire lead of the connector.

6. Cut two 900 cm (30 feet) deployment wires from

0.8 mm

(18 gauge) or thicker multi–strand wire. These wires will be used to fabricate the drive deployment harness.

7. Strip 13 mm (1/2 inch) of insulation from both ends of the wires cut in the previous step.

8. Short the wires by twisting together one end from each. Deployment wires shall remain shorted and not be connected to a power source until the ai bag is to be deployed.

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

9. Twist together one connector wire lead to one deployment wire. The connection should be mechanically secure.

10. Bend twisted connection made in the previous step flat and wrap tightly with electrical tape to insulate and secure.

1 1 . T w i s t t o g e t h e r , b e n d a n d t a p e t h e r e m a i n i n g

connector wire lead to the remaining deploymen wire.

12. Connect the deployment harness to the driver ai bag assembly, yellow connector at the base of the steering column. Route deployment harness ou the driver side of the vehicle.

WARNING: DEPLOYMENT WIRES 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. Connecting the deployment wires to the powe source should always be the final step in the ai bag assembly deployment procedure. Failure to follow procedures in the order listed could result in personal injury.

13. Disconnect passenger air bag assembly, yello connector located behind glove box assembly.

SUPPLEMENTAL RESTRAINT SYSTEM 9A-23

14.Cut the passenger air bag assembly harness connector from the vehicle leaving at least 15 cm (six inches) of wire at the connector.

1 5 . S t r i p 1 3 m m ( 1 / 2 i n c h ) o f i n s u l a t i o n f r o m b l u e –

white and pink–blue wire lead of the connector.

1 6 . C u t t w o 9 0 0 c m ( 3 0 f e e t ) d e p l o y m e n t w i r e s f r o m

0.8 mm

(18 gauge) or thicker multi–strand wire. These wires will be used to fabricate the passenger deployment harness.

17. Strip 13 mm (1/2 inch) of insulation from both ends of the wires cut in the previous step.

1 8 . S h o r t t h e w i r e s b y t w i s t i n g t o g e t h e r o n e e n d f r o m

each. Deployment wires shall remain shorted and not be connected to a power source until the ai bag is to be deployed.

IRES SHALL REMAIN SHORTED AND NOT BE

CONNECTED TO A POWER SOURCE UNTIL THE

IR 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.

1 9 . T w i s t t o g e t h e r o n e c o n n e c t o r w i r e l e a d t o o n e

deployment wire. The connection should be mechanically secure.

2 0 . B e n d t w i s t e d c o n n e c t i o n m a d e i n t h e p r e v i o u s s t e p

flat and wrap tightly with electrical tape to insulate and secure.

2 1 . T w i s t t o g e t h e r , b e n d a n d t a p e t h e r e m a i n i n g

connector wire lead to the remaining deployment wire.

22. Connect the deployment harness to the passenge

air bag assembly, yellow connector located behind the glove box assembly. Route deployment harness out the passenger side of the vehicle.

ARNING: DEPLOYMENT WIRES SHALL REMAIN SHORTED AND NOT BE CONNECTED TO A PO

ER 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. CONNECTING THE DEPLOYMENT WIRES SHOULD ALWAYS BE THE FINAL STEP IN THE AIR BAG ASSEMBLY DEPLOYMENT PROCEDURE. FAILURE TO FOLLOW PROCEDURES IN THE ORDER LISTED COULD RESULT IN PERSONAL INJURY.

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9A-24 SUPPLEMENTAL RESTRAINT SYSTEM

2 3 . Verify that the inside of the vehicle and the area

surrounding the vehicle are clear of all people and loose or flammable objects.

2 4 . S t r e t c h t h e d r i v e r a n d p a s s e n g e r d e p l o y m e n

harness to their full length.

25. Completely cover windshield area and front doo window openings with a drop cloth, blanket o similar item. This reduces the possibility of injur due to possible fragmentation of the vehicle's glass or interior.

26. Notify all people in the immediate area that you intend to deploy the air bags. The deployment will be accompanied by a substantial noise which ma startle the uninformed.

2 7 . S e p a r a t e t h e t w o e n d s o f t h e d r i v e r d e p l o y m e n

harness wires.

WARNING: DEPLOYMENT WIRES SHALL REMAIN SHORTED AND NOT BE CONNECTED TO A POWER SOURCE UNTIL THE AIR BAG IS 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. CONNECTING THE DEPLOYMENT WIRES TO THE POWER SOURCE SHOULD ALWAYS BE THE FINAL STEP IN THE AIR BAG ASSEMBLY DEPLOYMENT PROCEDURE. FAILURE TO FOLLOW PROCEDURES IN THE ORDER LISTED COULD RESULT IN PERSONAL INJURY.

NOTE: When the air bag deploys, the rapid gas expansion will create a substantial noise. Notify all people in the immediate area that you intend to deplo the air bags.

28. Connect the driver deployment harness wires to a power source to immediately deploy the driver ai bag assembly. Recommended application: 12 volts minimum, 2 amps minimum. A vehicle battery is suggested.

2 9 . S e p a r a t e t h e t w o e n d s o f t h e p a s s e n g e

deployment harness wires.

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.

vehicle battery is suggested.(Driver air bag assembly) Put on a pair of shop gloves and safet glasses to protect your hands and eyes from possible irritation and heat when handling the deployed air bag assembly. After an 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 o the chemical reaction. Sodium hydroxide dust (similar to 30. lye soap) is produced as a b 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.(Passenger air bag assembly) The passenger inflator requires no special precaution after deployment. 95% of the particulate emission are potassium chloride (KLC), which is commonly sold as an edible saltsubstitutes. even if water is applied. Post deployment products are relatively pH neutral. Disposing the inflator by burying it in a landfill will not products any hazardous products. As with an dusty environment, safety goggles, dust mask and gloves should be worn.

WARNING: SAFETY PRECAUTIONS MUST BE OBSERVED WHEN HANDLING A DEPLOYED AI BAG ASSEMBLY. AFTER DEPLOYMENT, THE METAL SURFACES OF THE AIR BAG ASSEMBLY

ILL BE VERY HOT. ALLOW THE AIR BAG

SSEMBLY 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 O PERSONAL INJURY.

fter an air bag assembly has been deployed, the metal canister and surrounding areas of the ai 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, wea gloves and handle by the air bag or trim cover.

31. Short the driver deployment harness wires b 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.

Page 45

34.In the unlikely event that either or both of the ai

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 deplo after following these procedures.

3 6 . R e m o v e t h e u n d e p l o y e d a i r b a g a s s e m b l y ( s ) f r o m

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

WARNING: WHEN STORING A LIVE AIR BAG ASSEMBLY OR WHEN LEAVING A LIVE AIR BAG ASSEMBLY UNATTENDED ON A BENCH O 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.

SUPPLEMENTAL RESTRAINT SYSTEM 9A-25

37. Temporarily store the air bag assembly with the ai 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 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.

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9A-26 SUPPLEMENTAL RESTRAINT SYSTEM

Tech 2 Scan Tool

From 98 MY, Isuzu dealer service departments are recommended to use Tech 2. Please refer to Tech 2 scan tool user guide.

901RW200

Legent

(1) PCMCIA Card (2) RS 232 Loop Back Connector (3) SAE 16/19 Adaptor (4) DLC Cable (5) Tech-2

Getting Started

060R300015

6. Turn on the vehicle ignition switch.

7. Verify the Tech 2 power up display.

• Before operating the Isuzu PCMCIA card with the

Tech 2, the following steps must be performed:

1. Insert the Isuzu System PCMCIA card (1) into the

Tech 2 (5).

2. Connect the SAE 16/19 adapter (3) to the DLC

cable (4).

3. Connect the DLC cable to the Tech 2 (5)

4. Make sure of the vehicle ignition is off.

5. Connect the Tech 2 SAE 16/19 adapter to the

vehicle DLC connector.

060RW009

NOTE:The RS232 Loop back connector is only used to diagnosis Tech 2. Refer to user guide of the Tech 2.

Page 47

Service Precautions for SRS

Component Service

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 fo that application. If the correct part numbe 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 O 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.

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 “SRS” from left dash side lowe fuse block or disconnect battery.

2. Disconnect yellow connector at the base o steering column.

3. Remove glove box assembly; Refer to “Passenge air bag assembly replacement” in this section.

4. Disconnect passenger air bag assembly yello 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.

SUPPLEMENTAL RESTRAINT SYSTEM 9A-27

Enabling The SRS

Installation

Turn ignition switch to “LOCK” and remove key.

1. Connect yellow connector passenger air bag assembly.

2. Install glove box assembly. Refer to “Passenge Air Bag Assembly Replacement” in this section.

3. Connect yellow connector at the base of the steering column.

4. Install “AIR BAG” fuse “SRS” to left dash side lower fuse block or connect battery.

Handling / Installation / Diagnosis

1. Air bag assembly should not be subjected to temperatures above 65!C (150!F).

2. Air bag assembly, and SRS control unit should not be used if they have been dropped from a height of 100 centimeters (3.28 feet) or more.

3. When a SRS control unit is replaced, it must be oriented with the arrow on the SRS control unit pointing toward the front of the vehicle. It is ver important for the SRS control unit to be located flat on the mounting surface, parallel to the vehicle datum line. It is important that the SRS control unit 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.

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:

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9A-28 SUPPLEMENTAL RESTRAINT SYSTEM

– 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 – SRS control unit

SRS control unit always should be checked according to “SRS Control Unit Replacement Guidelines.”

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

Inspect SRS coil assembly wiring and steering wheel for any sign of scorching, melting, or damage due to excessive heat. If coil assembly wire or steering wheel is damaged, replace them. The steering column and wheel must be dimensionally checked to determine if they are damaged. Refer to steering wheel of in this manual.

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

Do not attempt to repair the SRS control unit, the SRS harness, the SRS coil assembly, the air bag assembly, the steering wheel, or the steering column. Service of these items is replacement only. Verify replacement part numbers.

CAUTION: Proper operation of the SRS control unit and supplemental restraint system (SRS) requires that any repairs to the vehicle structure return it to its original production configuration.

Removal

To remove the connector, hold the cover insulator (1) and pull it. The cover insulator slides and lock will be released. Do not hold the socket insulator (2).

SRS Connectors

CAUTION: The special yellow color connectors are used for supplemental restraint system-air bag circuit. When removing the cable harness, do not pull the cables otherwise, cable disconnection may occur. When connect the SRS connector, insert the connector completely. Imperfect locking may cause malfunction of SRS circuit.

827RW028

Page 49

SUPPLEMENTAL RESTRAINT SYSTEM 9A-29

Installation

To install the connector, hold the socket insulator (1) and insert it. The cover insulator slides and connector will be locked. Do not hold the cover insulator (2).

827RW027

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9A-30 SUPPLEMENTAL RESTRAINT SYSTEM

SRS Control Unit

Service Precautions

WARNING: DURING SERVICE PROCEDURES, BE VERY CAREFUL WHEN HANDLING SRS control unit. NEVER STRIKE OR JAR SRS control unit. UNDER SOME CIRCUMSTANCES, IT COULD CAUSE DEPLOYMENT AND RESULT IN PERSONAL INJURY OR IMPROPER OPERATION OF THE SUPPLEMENTAL RESTRAINT SYSTEM (SRS) . SRS control unit MOUNTING BRACKET BOLTS MUST BE CAREFULLY TORQUED TO ASSURE PROPER OPERATION. NEVER POWE UP THE SRS WHEN SRS control unit IS NOT RIGIDLY ATTACHED TO THE VEHICLE. THE SRS control unit COULD BE ACTIVATED WHEN POWERED WHILE NOT RIGIDLY ATTACHED TO THE VEHICLE WHICH COULD CAUSE DEPLOYMENT AND RESULT IN PERSONAL INJURY.

WARNING: PROPER OPERATION OF THE SRS CONTROL UNIT REQUIRES THE SRS CONTROL UNIT TO BE RIGIDLY ATTACHED TO THE VEHICLE STRUCTURE AND THAT THE ARROW ON THE SENSOR BE POINTING TOWARD THE FRONT OF THE VEHICLE.

SRS control unit is specifically calibrated and is keyed to the SRS control unit location SRS wiring harness. Caution should be used to ensure proper location of the SRS control unit. The keying of the SRS control unit to its location and wiring harness connectors should never be modified in the field.

Removal

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

2. Remove the transmission knob (for M/T) and transfer lever knob.

3. Remove the front console assembly and disconnect wiring harness connector.

4. Pull CPA (Connector Position Assurance) out and push connector lock down to disconnect the SRS control unit harness connector.

5. Remove the three SRS control unit fixing bolts and remove SRS control unit.

Legent

(1) SRS control unit (2) SRS Harness (3) Connector Position Assurance

Installation

1. Install the SRS control unit on bracket and fixing bolts and tighten the fixing bolts to the specified torque.

Torque: 7 !!!! 2 N""""m (0.7 !!!! 0.2 kg""""m/61 lb in)

2. Connect the SRS control unit harness connecto and after that, put CPA into connector.

3. Install the front console.

4. Install the transmission knob (for M/T) and transfe lever knob.

RTW49JSH00 0101

Page 51

5. Enable the SRS. (Refer to “Enabling the SRS” in this section)

Legent

(1) SRS control unit (2) SRS Harness (3) Connector Position Assurance

RTW49JSH000101

SUPPLEMENTAL RESTRAINT SYSTEM 9A-31

Page 52

9A-32 SUPPLEMENTAL RESTRAINT SYSTEM

Driver Air Bag Assembly

Service Precautions

WARNING: SAFETY PRECAUTIONS MUST BE FOLLOWED WHEN HANDLING A DEPLOYED AI BAG ASSEMBLY. AFTER DEPLOYMENT, THE AI 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 POWER 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. NEVE CARRY AIR BAG ASSEMBLY BY THE WIRES O 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 ALIVE AI BAG ASSEMBLY ON A BENCH OR OTHE SURFACE, ALWAYS FACE BAG AND TRIM COVE 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.

2. Check the both side hole of the steering cover.

3. Check the position of the pins in a hole. Push the pin in the direction of an arrow.

060R300025

NOTE: In the event deployment has occurred, inspec 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).

060R300032

Page 53

4. Push the four pins at 5"6 mm bar.

5. Cancel the lock four pins.

6. Disconnect the SRS air bag connector pin.

060R300045

SUPPLEMENTAL RESTRAINT SYSTEM 9A-33

7. Disconnect the SRS air bag connector and horn lead connector located behind the air bag assembly and remove the air bag assembly.

Installation

060R300041

1. Connect the SRS air bag connector and horn lead connector.

060R300042

060R300041

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9A-34 SUPPLEMENTAL RESTRAINT SYSTEM

2. Connect the SRS air bag connector pin.

060R300042

3. Align the each snap stud of driver air bag to the hole of steering wheel.

060R300020

4. Push the SRS air bag area1 and area2. At that time confirm the audible noise of each stud.

060R300030

5. Enable the SRS (Refer to “Enabling the SRS” in this section).

CAUTION: Never use the air bag assembly from

060R300036

another vehicle and difference model year air bag assembly.

Use only new air bag assembly proper to the TFR/S which is being repaired.

Page 55

SUPPLEMENTAL RESTRAINT SYSTEM 9A-35

Steering Wheel

Service Precautions

WARNING: WHEN CARRYING A LIVE AIR BAG ASSEMBLY, MAKE SURE THE BAG AND TRIM COVER ARE POINTED AWAY FROM YOU. NEVE CARRY AIR BAG ASSEMBLY BY THE WIRES O 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 ALIVE AI BAG ASSEMBLY ON A BENCH OR OTHE SURFACE, ALWAYS FACE BAG AND RIM COVE 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.

2. Remove steering wheel attachment nut.

3. Apply a setting mark across the steering wheel and shaft so parts can be reassembled in thei original position.

060R300009

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

Removal

1. Remove the SRS air bag assembly. (Refer to “Driver Air Bag Assembly” in this section)

060R300024

4. Move the tires to the straight ahead position before removing the steering wheel. Install steering wheel puller onto steering wheel and remove steering wheel with 5-8521-0016-0.

5. Feed wiring through the wheel and remove wheel.

CAUTION: Never apply force to the steering wheel in direction of the shaft by using a hammer o other impact tools in an attempt to remove the steering wheel. The steering shaft is designed as an energy absorbing unit.

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9A-36 SUPPLEMENTAL RESTRAINT SYSTEM

Installation

1. Install the steering wheel and align the setting marks.

060R300024

NOTE: Confirm SRS and Horn harness connector is fixed by the steering wheel.

2. Tighten the steering wheel fixing nut to the specified torque.

Torque : 34 N!!!!m (3.5 kg!!!!m/25 lb ft)

3. Install the SRS air bag assembly. (Refer to “Drive Air Bag Assembly” in this section)

RTW33BSH0 00601

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SUPPLEMENTAL RESTRAINT SYSTEM 9A-37

SRS Coil Assembly

Service Precautions

WARNING: WHEN CARRYING A LIVE AIR BAG ASSEMBLY, MAKE SURE THE BAG AND TRIM COVER ARE POINTED AWAY FROM YOU. NEVE CARRY AIR BAG ASSEMBLY BY THE WIRES O 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 ALIVE AI BAG ASSEMBLY ON A BENCH OR OTHE SURFACE, ALWAYS FACE BAG AND RIM COVE 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.

2. Remove the steering wheel attachment nut.

3. Apply a setting mark across the steering wheel and shaft so parts can be reassembled in thei original position.

060R300009

NOTE: In the event deployment has occurred, inspec 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. Remove the SRS air bag assembly. (Refer to “Driver Air Bag Assembly” in this seciton)

060R300024

4. Move the tires to the straight ahead position before removing the steering wheel and remove wheel with 5-8521-0016-0.

5. Feed wiring though the wheel and remove wheel.

6. Remove the steering lower cover and engine hood opening lever.

7. Remove the driver knee bolster assembly.

8. Remove the steering column cover.

9. Remove air conditioning lower duct.

10.Disconnect the wiring harness connectors located at the base of steering column.

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9A-38 SUPPLEMENTAL RESTRAINT SYSTEM

CAUTION: Never apply force to the steering wheel in the direction of the shaft by using a hammer o other impact tools in an attempt to remove the steering wheel. The steering shaft is designed as an energy absorbing unit.

11. Remove the combination switch assembly with SRS coil.

NOTE: SRS coil is a part of combination switch assembly, which cannot be replaced separately. Therefore, be sure not to remove the SRS coil from the combination switch assembly.

Installation

1. Install the combination switch assembly with SRS coil.

2. Turn the SRS coil counterclockwise to full, return about 3 turns and align the neutral mark.

CAUTION: When turning the SRS coil counterclockwise to full, stop turning if resistance is felt. Forced further turning may damage the cable in the SRS coil.

825RS048

6. Install the driver knee bolster assembly.

7. Install the steering lower cover and engine hood opening lever.

8. Install the steering wheel and align the setting marks.

826RW014

Legend

(1) Neutral mark

3. Connect the wiring harness connectors located a the base of steering column.

4. Install the air conditioning lower duct.

5. Install the steering column cover.

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

060R300024

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SUPPLEMENTAL RESTRAINT SYSTEM 9A-39

NOTE: Confirm SRS and Horn harness connector is fixed by the steering wheel.

RTW33BSH0 00601

9. Tighten the steering wheel fixing nut to the

specified torque.

Torque: 35 N!!!!m (3.5 kg!!!!m/25 lb ft)

10. Install the SRS air bag assembly. (Refer to “Drive

Air Bag Assembly in this section).

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9A-40 SUPPLEMENTAL RESTRAINT SYSTEM

Steering Column

Service Precautions

WARNING: WHEN CARRYING A LIVE AIR BAG ASSEMBLY, MAKE SURE THE BAG AND TRIM COVER ARE POINTED AWAY FROM YOU. NEVE CARRY AIR BAG ASSEMBLY BY THE WIRES O 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 ALIVE AI BAG ASSEMBLY ON A BENCH OR OTHE SURFACE, ALWAYS FACE BAG AND RIM COVE 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.

2. Remove the steering wheel attachment nut.

3. Apply a setting mark across the steering wheel and shaft so parts can be reassembled in thei original position.

060R300009

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

Removal

1. Remove the SRS air bag assembly. (Refer to “Driver Air Bag Assembly” in this section)

060R300024

4. Move the tires to the straight ahead position before removing the steering wheel and removing wheel with 5-8521-0016-0.

5. Feed wiring though the wheel and remove wheel.

6. Remove the steering lower cover and engine hood opening lever.

Page 61

7. Remove the driver knee bolster assembly.

RTW49JSH000401

Legend

(1) RHD (2) LHD

8. Remove the steering column cover.

9. Disconnect the wiring harness connectors located at the base of steering column.

SUPPLEMENTAL RESTRAINT SYSTEM 9A-41

16.Apply a setting mark across the universal joint and steering shaft to reassemble the parts in thei original position.

17.Remove steering column assembly.

Installation

1. Install the steering column assembly and align the setting marks on the universal joint and steering shaft made during removal.

060R300038

10. Remove the combination switch assembly with SRS coil.

SRS coil is a part of combination switch assembly, which cannot be replaced separately. Therefore, be sure not to remove the SRS coil from the combination switch assembly.

11.Remove the snap ring.

1 2 . R e m o v e t h e c u s h i o n r u b b e r .

13. Disconnect shift lock cable (A/T only).

14.Disconnect the starter switch harness connecto located base of steering column.

15. Remove steering lock cylinder assembly.

060R300038

2. Tighten the steering column fixing bolts (dash panel side) to the specified torque.

Torque: 20 N!!!!m (2.0 kg!!!!m/14 lb ft)

3. Tighten the steering column fixing bolts (Pedal bracket) to the specified torque.

Torque: 20 N

!!!!

m (2.0 kg

!!!!

m/14 lb ft)

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9A-42 SUPPLEMENTAL RESTRAINT SYSTEM

4. Tighten the universal joint to the specified torque.

Torque: 31 N!!!!m (3.2 kg!!!!m/23 lb ft)

5. Install steering lock cylinder assembly.

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.

10. Connect the wiring harness connector located on the base of steering column.

11. Turn the SRS coil counterclockwise to full, return about 3 turns and align the neutral mark.

CAUTION: When turning the SRS coil counterclockwise to full, stop turning if resistance is felt. Forced further turning may damage to the cable in the SRS coil.

825RS048

13.Install the steering wheel and align the setting marks.

826RW014

Legend

(1) Neutral mark

12.Install steering column cover.

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

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SUPPLEMENTAL RESTRAINT SYSTEM 9A-43

NOTE: Confirm SRS and Horn harness connector is fixed by the steering wheel.

RTW33BSH0 00601

14.Tighten the steering wheel fixing nut to the specified torque.

Torque: 35 N!!!!m (3.5 kg!!!!m/25 lb ft)

15. Install the SRS air bag assembly. (Refer to “Drive Air Bag Assembly in this section)

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9A-44 SUPPLEMENTAL RESTRAINT SYSTEM

Passenger Air Bag Assembly

Service Precautions

WARNING: WHEN CARRYING A LIVE AIR BAG ASSEMBLY, MAKE SURE THE BAG AND TRIM COVER ARE POINTED AWAY FROM YOU. NEVE CARRY AIR BAG ASSEMBLY BY THE WIRES O 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 ALIVE AI BAG ASSEMBLY ON A BENCH OR OTHE SURFACE, ALWAYS FACE BAG AND RIM COVE 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.

4. Remove passenger air bag assembly fixing bolts and nuts. Universal joint is used when removing a nut.

060R300043

WARNING: IN THE EVENT DEPLOYMENT HAS OCCURRED, INSPECT COIL ASSEMBLY WIRE FOR ANY SIGNS OF SCORCHING, MELTING O 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.

3. Remove glove box cover.

060R300044

5. Remove passenger air bag assembly.

6. Disconnect passenger air bag assembly harness connector.

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SUPPLEMENTAL RESTRAINT SYSTEM 9A-45

Installation

1. Connect passenger air bag assembly harness connector.

2. Install passenger air bag assembly.

3. Install passenger air bag assembly fixing bolts and nuts. Universal joint is used when removing a nut.

Torque: 8 N!!!!m (0.8 kg!!!!m/78 lb in)

060R300043

060R300044

4. Install glove box cover.

5. Install glove box.

6. Enable the SRS. (Refer to “Enabling the SRS” in this section)

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9A-46 SUPPLEMENTAL RESTRAINT SYSTEM

Pretensioner Seat Belt (If so quipped)

Service Precaution

WARNING: WHEN PERFORMING SERVICE ON OR AROUND THE PRETENSIONER SEAT BELT OR THE PRETENSIONER SEAT BELT WIRING, FOLLOW THE PROCEDURES LISTED BELOW TO TEMPORARILY DISABLE THE PRETENSIONE SEAT BELT. FAILURE TO FOLLOW PROCEDURES COULD RESULT IN POSSIBLE THE PRETENSIONER SEAT BELT DEPLOYMENT, PERSONAL INJURY O OTHERWISE UNNEEDED THE PRETENSIONE SEAT BELT REPAIR. AS A PRECAUTION, WEAR GLOVES AND SAFETY GLASSES WHEN PERFORMING THE PRETENSIONER SEAT BELT. WHEN DEPLOY A LIVE PRETENSIONER SEAT BELT AT OUTSIDE THE VEHICLE, DEPLOYMENT HARNESS SHALL REMAIN SHORTED AND NOT BE CONNECTED TO A POWER SOURCE UNTIL THE PRETENSIONE SEAT BELT IS TO BE DEPLOYED. THE PRETENSIONER SEAT BELT WILL IMMEDIATELY DEPLOY WHEN A POWER SOURCE IS CONNECTED TO IT. CONNECTING THE DEPLOYMENT HARNESS SHOULED ALWAYS BE THE FINAL STEP IN THE PRETENSIONER SEAT BELT DEPLOYMENT PROCEDURE. FAILURE TO FOLLOW PROCEDURES IN THE ORDER LISTED COULD RESULT IN PERSONAL INJURY.

Removal

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

2. Remove the foot rest located behind the seat.

3. Remove the cover on seat slide.

4. Disconnect the pretensioner connector at the

5. Remove four fixing bolts the seat slide and

6. Remove the seat cover.

7. Remove the pretensioner seat belt assembly.

Installation

1. Install the pretensioner seat belt assembly.

2. Install the seat cover.

3. Install the seat on seat slide and four fixing bolts.

4. Connect the yellow pretensioner connector at the

5. Install the cover on seat slide.

6. Install the foot rest located behind the seat.

base of the seat.

remove seat.

base of the seat.

Parts Location

Legend

(1) Seat (2) Bolt (3) Pretensioner Harness (4) Pretensioner

RTW49JSH000301

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SUPPLEMENTAL RESTRAINT SYSTEM 9A-47

Main Data and Specifications

Fastener Tightening Specification

Application N!!!!m kg!!!!m Ft.lb

SRS control unit 7 0.7 5

Steering wheel fixing bolt 35 3.5 25

Steering column (dash panel side fixing bolts) 20 2.0 14

Steering column (Pedal bracket fixing bolt) 20 2.0 14

Steering column (Universal joint fixing bolt) 31 3.2 23

Passenger Air Bag fixing bolt & nut 8 0.8 5.8

Pretensioner seat belt bolt 55 5.6 40

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9A-48 SUPPLEMENTAL RESTRAINT SYSTEM

Special Tools

5-8840-2421-0 SRS Driver/Passenger Load Tool

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.

5-8840-0285-0 DVM

901RS146

The 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 when connected to the passenger air bag assembly harness connector.

901RS163

The 5-8840-0285-0 DVM is the preferred DVM for use in SRS diagnosis and repair. However, 5-8840-03660 may be used if 5-8840-0285-0 is not available. No other DVMs are approved for SRS diagnosis and repair.

Scan Tool

901RW176

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SUPPLEMENTAL RESTRAINT SYSTEM 9A-49

The 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.

5-8840-0385-0 Connector Test Adapter Kit

901RS151

The 5-8840-0385-0 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 DVM prove, 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.

5-8840-2468-0 SRS Deployment Tool

5-8840-2420-0 SRS Deployment Fixture

The 5-8840-2420-0 SRS Deployment Fixture must be used for deployment of the undeployed passenger side air bag.

5-8840-2796-0 SRS Adapter for Load Tool

901RV056

901RW106

The 5-8840-2468-0 SRS Deployment Tool must be used for deployment of the undeployed air bag.

901RW107

The 5-8840-2796-0 SRS Adapter for Load Tool must be used with 5-8840-2421-0 SRS Driver/Passenger Load Tool.

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9A-50 SUPPLEMENTAL RESTRAINT SYSTEM

5-8840-2795-0 SRS Adapter for Deployment Tool

901RW107

The 5-8840-2795-0 SRS Adapter for Deployment Tool must be used with 5-8840-2468-0 SRS Deployment Tool.

5-8521-0016-0 Steering Wheel remover

LNW28BSH003101

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RESTRAINT CONTROL 9A1-1

RESTRAINTS

RESTRAINT CONTROL SYSTEM

PAGE

Service Precaution.............................................................................................................9A1- 2

Diagnosis Information ..................................................................................................9A1- 3

Diagnostic Procedures .................................................................................................9A1- 3

Diagnostic Codes..........................................................................................................9A1- 3

How To Read Trouble Codes .......................................................................................9A1- 3

How To Clear Trouble Codes .......................................................................................9A1- 3

Scan Tool Diagnostics..................................................................................................9A1- 3

Basic Knowledge Required ..........................................................................................9A1- 3

Basic Electrical Circuits ...............................................................................................9A1- 4

"Flash Code" Diagnostics ............................................................................................9A1- 4

DATA LIST (Tech2) ........................................................................................................9A1- 5

Diagnostic Trouble Codes ............................................................................................9A1- 6

System Schematic .............................................................................................................9A1- 7

Chart A SRS control unit Integrity Check ........................................................................9A1-10

Chart B "AIR BAG" Warning Lamp Comes "ON" Steady................................................9A1-12

Chart C "AIR BAG" Warning Lamp Does Not Come "ON" Steady.................................9A1-14

DTC B0016 (Flash Code 16) Passenger Airbag Squib Circuit (Stage1) Low

Resistance ........................................................................................................................9A1-17

DTC B0017 (Flash Code 17) Passenger Airbag Squib Circuit (Stage1) High

Resistance ........................................................................................................................9A1-20

DTC B0018 (Flash Code 18) Passenger Airbag Squib Circuit (Stage1) Voltage

Range/Performance .........................................................................................................9A1-23

DTC B0022 (Flash Code 22) Driver Airbag Squib Circuit (Stage1) Low

Resistance ........................................................................................................................9A1-26

DTC B0024 (Flash Code 24) Driver Airbag Squib Circuit (Stage1) Voltage

Range/Performance...........................................................................................................9A1-29

DTC B0026 (Flash Code 26) Driver Airbag Squib Circuit (Stage1) High

Resistance ........................................................................................................................9A1-32

DTC B0033 (Flash Code 33) ECU Connector Poor Connection .....................................9A1-35

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9A1-2 RESTRAINT CONTROL SYSTEM

DTC B0051 (Flash Code 51) Squib Circuit Activated (Clash) .........................................9A1-37

DTC B0053 (Flash Code 53) Deployment Command Despite Present Trouble

Code ..................................................................................................................................9A1-39

DTC B0057 (Flash Code 57) Passenger Pretensioner Squib Circuit Low

Resistance ........................................................................................................................9A1-41

DTC B0058 (Flash Code 58) Passenger Pretensioner Squib Circuit High

Resistance ........................................................................................................................9A1-44

DTC B0059 (Flash Code 59) Passenger Pretensioner Squib Circuit Voltage

Range/Performance .........................................................................................................9A1-47

DTC B0064 (Flash Code 64) Driver Pretensioner Squib Circuit Low Resistance.........9A1-50

DTC B0065 (Flash Code 65) Driver Pretensioner Squib Circuit High Resistance........9A1-53

DTC B0066 (Flash Code 66) Driver Pretensioner Squib Circuit Voltage Range/

Performance .....................................................................................................................9A1-56

DTC B0670 (Flash Code 63) Airbag Telltale Circuit Malfunction ...................................9A1-59

DTC B1000 (Flash Code 72) SDM Internal Fault ..............................................................9A1-61

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.

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RESTRAINT CONTROL 9A1-3

Diagnostic Information

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.

Diagnostic Procedures

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.

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 prope “AIR BAG” warning lamp operation and checks fo 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.

Preforming 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 SRS control unit 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 PDT is not available, have the vehicle serviced by HOLDEN 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 an Isuzu 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 or a manufacturer's update before it can be used for SRS diagnostics. To use the scan tool, connect it to the DLC connector 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 SRS control unitSRS control unit “Serial Data” output (terminal 21) to the DLC connector (terminal 2).

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

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9A1-4 RESTRAINT CONTROL SYSTEM

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.

“Flash Code” Diagnostics

Flash code diagnostics can be used to read active codes and to determine if history codes are present but cannot be used to clear codes or read history codes. Flash code diagnostics is enabled by grounding by terminal 4 shorting to terminal 13 of the DLC connector with the ignition switch “ON”. Grounding terminal 4 of the DLC connector pulls the “Diagnostics Request” input (Terminal 1) of the SRS control unit low and signals the SRS control unit to enter the flash code diagnostic display mode.

060R300052

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RESTRAINT CONTROL 9A1-5

The SRS control unit displays the trouble codes by flashing the warning lamp. Each code that is displayed will consist of a number of flashes which represents the tens digit, a 1.2 second pause, following by a number of flashes which represents the ones digit of the code. Each code is displayed one time before moving on to the next code. After all of the codes have been displayed, the entire code sequence will continually by repeated until ground is removed from terminal 4 of the DLC connector.

Two special codes exist when reading in the flash code mode (Flash Code 12 and Flash Code 13). “Flash Code 12” will always be the first code displayed when the flash code mode is enable Code 12 is not an indication of a SRS problem but an indication that the flash code mode has been enabled. If there are no active or history codes present, the SRS control unit will display code 12 until ground is removed from the DLC connector at terminal 4. “flash Code 13” will be displayed if history codes are present. To read the history codes a scan tool must be used.

DATA LIST (Tech 2)

DISPLAY on Tech 2 UNIT VALUE

Driver Airbag Loop Passenger Airbag Loop System Voltage V 12.0 Driver Seat Belt Status

Enabled/Disabled Enabled/Disabled

Not Backled/Backled

060R300051

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9A1-6 RESTRAINT CONTROL SYSTEM

Diagnostic Trouble Codes

Choose and trace an appropriate flowchart by the numbers listed below to find fault and repair.

DTC (Flash Code)

Description

B0016

B0017

B0018

B0022

B0024

B0026

B0033

B0051

B0053

B0057

B0058

B0059

B0064

B0065

B0066

B0670

B1000

—

(12)

—

(13)

(16)

(17)

(18)

(22)

(24)

(26)

(33)

(51)

(53)

(57)

(58)

(59)

(64)

(65)

(66)

(63)

(72)

Diagnostic Display Mode (Flash Code only)

Passenger Airbag Squib Circuit Low Resistance

Passenger Airbag Squib Circuit High Resistance

Passenger Airbag Squib Circuit Voltage Range / Performance

Driver Airbag Squib Circuit Low Resistance

Driver Airbag Squib Circuit Voltage Range / Performance Resistance

Driver Airbag Squib Circuit High Resistance

ECU Connector Poor Connection

Squib Circuit Activated (Clash)

Deployment Command Despite Present Trouble Code

Passenger Pretensioner Squib Circuit Low Resistance

Passenger Pretensioner Squib Circuit High Resistance

Passenger Pretensioner Squib Circuit Voltage Range / Performance

Driver Pretensioner Squib Circuit Low Resistance

Driver Pretensioner Squib Circuit High Resistance

Driver Pretensioner Squib Circuit Voltage Range / Performance Resistance

Airbag Telltale Circuit Malfunction

SDM Internal Fault (SDM= SRS control unit)

Page 77

System Schematic

RESTRAINT CONTROL 9A1-7

SRS Diagnostic System Check

The diagnostic procedures used in this section are designed to find and repair SRS malfunctions. To get the best results, it is important to use the diagnostic charts and follow the sequence listed below:

A Perform the “SRS Diagnostic System Check.”

The “SRS Diagnostic System Check” must be the starting point of any SRS diagnostics. The “SRS Diagnostic System Check” checks for proper “AIR BAG” warning lamp operation, the ability of the SRS control unit to communicate through the “Serial Data” line and whether SRS diagnostic trouble codes exist.

B 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 malfunctions. Bypassing these procedures may result in extended diagnostic time, incorrect diagnosis and incorrect parts replacement.

C Repeat the “SRS Diagnostic System Check” after

any repair or diagnostic procedures have been preformed. Performing the “SRS Diagnostic System Check” after all repair or diagnostic procedures will ensure that the repair has been made correctly and that no other malfunctions exist

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9A1-8 RESTRAINT CONTROL SYSTEM

Circuit Description

When the ignition switch is first turned “ON”, “Ignition 1” voltage is applied from the “SRS” fuse to the SRS control unit at the “Ignition 1” input terminals “35”. The SRS control unit responds by flashing the “AIR BAG” warning lamp seven times, while performing tests on the SRS.

Diagnostic Aids

The order in which diagnostic trouble codes are diagnosed is very important. Failure to diagnose the diagnostic trouble codes in the order specified may result in extended diagnostic time, incorrect diagnosis and incorrect parts replacement.

Notes On System Check Chart

1. The “AIR BAG” warning lamp should flash seven times after ignition is first turned “ON”.

2. After the “AIR BAG” warning lamp flashes seven times, it should turn “OFF”

3. This test checks for the proper operation of the “Serial Data” line. This test will also determine whether history diagnostic trouble codes are stored and, if so, identify them.

4. Improper operation of the “AIR BAG” warning lamp is indicated. This test differentiates a warning lamp stays “ON” condition from a warning lamp does not come “ON” condition.

5. This test checks for proper operation of the “Serial Data” line. This test will also identify the stored diagnostic trouble codes and whether they are current or history.

SRS Diagnostic System Check

Step Action Yes No

1 Note the “Air Bag” warning lamp as ignition switch is turned “ON.”

Does the “AIR BAG” warning lamp flash seven 7 times?

Go to Step 2 Go to Step 3

2 Note the “AIR BAG” warning lamp after it flashed 7 times.

Does the “AIR BAG” warning lamp go “OFF”?

3 Note the “AIR BAG” warning lamp as ignition switch is turned

“ON”. Does the “AIR BAG” warning lamp come “ON” steady?

Note the “AIR BAG” warning lamp as that ignition switch is turned “ON.”

Ignition switch “OFF.”

Connect a scan tool to data link connector.

Follow direction given in the scan tool instruction manual. Ignition switch “ON.”

Request the SRS diagnostic trouble code display, recode all history diagnostic trouble code(s). specify as such, on repair order

Is (are) diagnostic trouble code(s) displayed?

Go to Step 4 Go to Step 5

Go to Chart B. Go to Chart C.

Ignition switch

“OFF.”

When DTC B1000 is

set, go to DTC

B1000 Chart.

For all other history

codes refer to

“Diagnostic Aids”

For that specific

DTC.

A history DTC

indicates the

malfunction has

been repaired or is

intermittent.

SRS is functional

and free of

malfuncitons, no

further diagnosis is

required.

If scan tool indicated

“NO DATA

RECEIVED,” refer to

chassis electrical

section 8.

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RESTRAINT CONTROL 9A1-9

Step Action Yes No

1. Ignition switch “OFF.”

2. Connect a scan tool to data link connector.

3. Follow directions as given in the scan tool instruction manual.

4. Ignition switch “ON.”

5. Request the SRS diagnostic trouble code display, Recode all diagnostic trouble code(s), specifying as current or history on repair order.

Is (are) diagnostic trouble code (s) displayed?

Ignition switch

“OFF”.

When DTC B0053 is

set, go to DTC

B0053 chart.

When DTC B0051 is

set, go to DTC

B0051 chart.

When DTC B0018

is set, go to DTC

B0018 chart.

When DTC B0024

is set, go to DTC

B0024 chart.

Diagnose remaining

current DTCs from

lowest to highest.

When only history

DTCs exist, refer to

“Diagnostics Aids”

for that specific

DTC.

A history DTC

indicates the

malfunction has

been repaired or is

intermittent.

If scan tool indicates “No Data Received,”

refer to chassis

electrical section 8.

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9A1-10 RESTRAINT CONTROL SYSTEM

Chart A SRS control unit Integrity Check

Circuit Description

When the SRS control unit recognizes “Ignition 1” voltage, applied to terminals “35”, is greater than 9 volts, the “AIR BAG” warning lamp is flashed 7 times to verify operation. At this time the SRS control unit performs “Turn–ON” tests followed by “Continuous Monitoring” tests. When a malfunction is detected, the SRS control unit sets a current diagnostic trouble code and illuminates the “AIR BAG” warning lamp. The SRS control unit will clear current diagnostic trouble codes and move them to a history file when the malfunction is no longer detected and/or the ignition switch is cycled, except for DTCs B0051 and B0053.

Chart Test Description

Number(s) below refer to step number(s) on the diagnostic chart:

1. This test confirms a current malfunction. If no current malfunction is occurring (history DTC set) the “Diagnostic Aids” for the appropriate diagnostic trouble code should be referenced. The SRS control unit should not be replaced for a history diagnostic trouble code.

2. This test checks for a malfunction introduced into the SRS during the diagnostic process. It is extremely unlikely that a malfunctioning SRS control unit would cause a new malfunction to occur during the diagnostic process.

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RESTRAINT CONTROL 9A1-11

3. When all circuitry outside the SRS control unit has been found to operate properly, as indicated by the appropriate diagnostic chart, then and only then should the SRS control unit be replaced.

Chart A SRS control unit Integrity Check

WARNING: DURING SERVICE PROCEDURES. BE VERY CAREFUL WHEN HANDLING A SRS CONTROL UNIT. NEVER STRIKE OR JAR THE SRS CONTROL UNIT. NEVER POWER UP THE SRS WHEN THE SRS CONTROL UNIT IS NOT RIGIDLY ATTACHED TO THE VEHICLE. ALL SRS CONTROL UNIT AND MOUNTING BRACKET FASTENERS MUST BE CAREFULLY TORQUED AND THE ARROW MUST BE POINTING TOWARD THE FRONT OF THE VEHICLE TO ENSURE PROPER OPERATION OF THE SRS. THE SRS CONTROL UNIT COULD BE ACTIVATED WHEN POWERED WHILE NOT RIGIDLY ATTACHED TO THE VEHICLE WHICH COULD CAUSE DEPLOYMENT AND RESULT IN PERSONAL INJURY

Step Action Yes No

1. This chart assumes that the “SRS Diagnostic System Check” and either a symptom chart or a diagnostic trouble code chart diagnosis have been performed. When all circuitry outside the SRS control unit has been found to operate properly, as indicated by the appropriate diagnostic chart, and the symptom or DTC remains current, the following

2. Diagnostic procedures must be performed to verify the need for SRS control unit replacement.

3. Ignition switch “OFF”.

4. Reconnect all SRS components, ensure all components are properly mounted.

5. Ensure the ignition switch has been “OFF” for at least 15 seconds.

6. Note “AIR BAG” warning lamp as ignition switch is turned “ON.”

Does warning lamp flash 7 times then go “OFF”?

2 Using a scan tool request diagnostic trouble code display.

Is the same symptom or DTC occurring as was when the “SRS Diagnostic System Check” was first performed?

1. Clear “SRS Diagnostic Trouble Codes”.

2. Ignition switch “OFF” for at least two minutes.

3. Note “AIR BAG” warning lamp as ignition switch is turned “ON.”

Does warning lamp flash 7 times then go “OFF”?

The symptom or

DTC is no longer

occurring.

Clear SRS

diagnostic trouble

codes.

Repeat “SRS

Diagnostic System

Check”

Go to Step 3 Ignition switch

SRS is functional

and free of

malfunctions.

No further diagnosis

is required.

Go to Step 4

Go to Step 2

“OFF”.

Go to the

appropriate chart for

the indicated

malfunction.

Ignition switch

“OFF”.

Replace SRS control

unit.

Go to Step 4

4 Reconnect all SRS components, ensure all components are

properly mounted. Was this step finished?

Repeat the “SRS

Diagnostic System

Check”

Go to Step 4

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9A1-12 RESTRAINT CONTROL SYSTEM

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

Circuit Description

When the ignition switch is first turned “ON”, “Ignition 1” voltage is applied from the “METER” fuse to “AIR BAG”, warning lamp which is connected to “SRS Warning Lamp”, terminal “39”. The “SRS” fuses appl system voltage to the “Ignition 1” inputs, terminals “35”. The SRS control unit responds by flashing the “AIR BAG” warning lamp 7 times. If “Ignition 1” is less than 9 volts, the “AIR BAG” warning lamp will come “ON” solid with no DTCs set.

Chart Test Description

Number(s) below refer to step number(s) on the diagnostic chart:

2. This test checks for an open in the “Ignition 1” circuit to the SRS control unit.

3. This test checks for the voltage of “Ignition 1”.

4. This test determines whether the malfunction is a short to ground in SRS waring lamp circuit.

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RESTRAINT CONTROL 9A1-13

Chart B “AIR BAG” warning lamp comes “ON” Steady

Step Action Yes No

1. When measurements are requested in this chart use 5-88400285-0 DVM with correct terminal adapter from 5-88400385-0.

2. Ignition switch “OFF.”

3. Connect scan tool to data link connector, follow directions as given in the scan tool instruction MANUAL.

4. Ignition switch “ON.”

5. Request SRS diagnostic trouble code display.

Dose scan tool indicate “No Data Received”?

1. Ignition switch “OFF”.

2. Inspect SRS control unit harness connector connection to SRS control unit.

Is it securely connected to the SRS control unit?

3 Using scan tool, request SRS data list.

Is “ignition” more than 9 volts?

Go to Step 2 Go to Step 3

Ignition switch

“OFF.”

Replace SRS

control unit.

Go to Step 5

Go to Step 4 Ignition switch

Connect SRS

control unit

securely to de–

activate shorting

clip in SRS control

unit harness

connector.

Go to Step 5

“OFF.”

Replace SRS

control unit.

Go to Step 5

1. Ignition switch “OFF.”

2. Disconnect SRS coil and passenger air bag assemblies. yellow connector located at base of steering column and behind the glove box assembly. Disconnect SRS control unit.

3. Disconnect the connector of “SRS Warning Lamp” of instrument cluster.

4. Measure resistance from SRS control unit harness connector terminal “40” to ground.

Does 5-8840-0285-0 DVM display “OL” (Infinite)?

5 Reconnect all SRS components, ensure all components are

properly mounted. Was this step finished?

Go to Chart A Replace SRS

harness.

Go to Step 5

Repeat the “SRS

Diagnostic System

Check”

Go to Step 5

Page 84

9A1-14 RESTRAINT CONTROL SYSTEM

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

Circuit Description

When the ignition switch is first turned “ON”, “Ignition 1” voltage is applied from the “METER” fuse to the “AIR BAG” warning lamp which is connected to “SRS Warning Lamp”, terminal “39”. The “SRS” fuse appl system voltage to the “Ignition 1” inputs, terminals “35”. The SRS control unit responds by flashing the “AIR BAG” warning lamp seven times. If “Ignition 1” is more than 16 volts, the “AIR BAG” warning lamp will be still “OFF” solid with no DTCs set.

Chart Test Description

Number(s) below refer to step number(s) on the diagnostic chart:

1. This test decides whether power is available to SRS control unit warning lamp power feed circuit.

2. This test determines whether the voltage is present in the warning lamp circuit.

3. This test determines if the malfunction is in the instrument cluster.

4. This test checks for open in the warning lamp circuitry.

5. This test isolates the SRS warning lamp circuit and checks for a short in the SRS warning lamp circuit to B+.

8. This test checks for a short from the SRS control unit warning lamp power feed circuit to ground.

9. This test determines whether the short to ground is due to a short in the wiring.

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RESTRAINT CONTROL 9A1-15

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

Step Action Yes No

1. When measurements are requested in this chart, use 5-88400285-0 DVM with correct terminal adapter from 5-88400385-0.

2. Ignition switch “OFF.”

3. Remove and inspect “METER” fuse to the “AIR BAG” warning lamp.

Is fuse good?

1. Ignition switch “OFF.”

2. Disconnect SRS coil and passenger air bag assemblies. Yellow connector located at base of steering column and behind the glove box assembly.

3. Disconnect SRS control unit.

4. Ignition switch “ON.”

5. Mea su re vo lt ag e on SRS co ntr ol un it ha rn ess co nn ec to r fr om terminal “39” to terminal “40” (ground).

Is system voltage present on terminal “39”?

1. Ignition switch “OFF.”

2. Remove instrument meter cluster.

3. Check for proper connection to instrument cluster at SRS warning lamp circuit terminal.

4. If ok, then remove and inspect “AIR BAG” bulb.

Is bulb good?

Go to Step 2 Go to Step 7

Go to Step 4 Go to Step 3

Go to Step 5 Replace bulb.

Go to Step 6

1. Ignition switch “OFF.”

2. Disconnect instrument meter cluster harness connector.

3. Ignition switch “ON.”

4. Measure voltage on SRS control unit harness connector from terminal “39” to terminal “40” (ground).

Is voltage 1 volt or less?

1. Install bulb.

2. Measure resistance from instrument meter cluster harness connector SRS warning lamp circuit terminal to SRS control unit harness connector terminal “7”.

Is resistance 5.0 ohms or less?

6 Reconnect all SRS components, ensure all components are

properly mounted. Was this step finished?

7 Perform chart C.

Was this step finished?

1. Replace “METER” fuse.

2. Ignition switch “ON” wait 10 Seconds then ignition switch “Off. “

3. Remove and inspect “METER” fuse. Is fuse good?

Go to Chart A Replace SRS

harness.

Go to Step 6

Service instrument

meter cluster.

Install instrument

meter cluster.

Go to Step 6

Repeat the “SRS

Diagnostic System

Check”

Go to Step 8 Go to Step 1

Install “METER”

fuse.

Go to Step 10

Replace SRS

harness.

Go to Step 6

Go to Step 9

Page 86

9A1-16 RESTRAINT CONTROL SYSTEM

Step Action Yes No

1. Disconnect SRS coil and passenger air bag assemblies. Yellow connectors located at base of steering column and behind the glove box assembly.

2. Disconnect SRS control unit.

3. Replace “METER” fuse.

4. Ignition switch “ON” wait 10 seconds.

5. Ignition switch “OFF”.

6. Remove and inspection “METER” fuse. Is fuse good?

Install “METER”

fuse.

Go to Chart A

Replace SRS

harness.

Replace “METER”

Go to Step 10

fuse.

10 Reconnect all SRS components, ensure all components are

properly mounted. Was this step finished?

Repeat the “SRS

Diagnostic System

Check”

Go to Step 10

Page 87

RESTRAINT CONTROL 9A1-17

DTC B0016 (Flash Code 16) Passenger Airbag Squib Circuit Low Resistance

Circuit Description

When the ignition switch is turned “ON”, the SRS control unit will perform tests to diagnose critical malfunctions within itself. Upon passing these tests “Ignition 1”, and deployment loop voltages are measured to ensure they are within their respective normal voltage ranges. The SRS control unit then proceeds with the “Resistance Measurement Test”. “Passenger Bag Low” terminal “47” is grounded through a resistor and the passenger current source connected to “Passenger Bag High” terminal “48” allows a known amount of current to flow. By monitoring the voltage difference between “Passenger Bag High” and “Passenger Bag Low”, the SRS control unit calculates the combined resistance of the passenger air bag assembly, harness wiring circuits “Passenger Bag High” and “Passenger Bag Low” connector terminal contact.

DTC Will Set When

The combined resistance of the passenger air bag assembly, harness wiring circuits “Passsenger Bag High” and “Passenger Bag Low”, and connector terminal contact is above a specified value. This test is run once each ignition cycle during the “Resistance Measurement Test” when:

1. No “higher priority faults” are detected during “Turn– ON”,

2. “Ignition 1” voltage is in the specified value.

Action Taken

SRS control unit turns “ON” the “AIR BAG” warning lamp and sets a diagnostic trouble code.

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9A1-18 RESTRAINT CONTROL SYSTEM

DTC Will Clear When

The ignition switch is turned “OFF.”

DTC Chart Test Description

Number(s) below refer to step number(s) on the diagnostic chart:

2. This test determines whether the malfunction is in the SRS control unit.

3. This test verifies connection of the yellow connector.

4. This test cheeks for proper operation of the shorting clip in the yellow connector.

5. The test checks for a malfunction passenger air bag assembly.

6. This test determines whether the malfunctioning is due to shortening in the wiring.

Diagnostic Aids

n intermittent condition is likely to be caused by a short between circuits “Passenger Bag High” and “Passenger Bag Low” or a malfunctioning shorting clip on the passenger air bag assembly which would require replacement of the air bag assembly. The test for this diagnostic trouble code is only run while “AIR BAG” warning lamp is performing the bulb check. When a scan tool “Clear Codes” command is issued and the malfunction is still present, the DTC will not reappear until the next ignition cycle.

DTC B0016 (Flash Code 16) Passenger Airbag Squib Circuit Low Resistance

Step Action Yes No

1 Was the “SRS Diagnostic System Check” performed? Go to Step 2 Repeat the “SRS

Diagnostic System

Check”

1. Check the passenger air bag squib circuit for short to voltage or short to ground.

2. If the problem found, repair as necessary.

Was a problem found?

1. Ignition switch “Off.”

2. Make sure the passenger air bag assembly yellow connector located behind the glove box assembly is seated properly.

Is the yellow connector connected properly?

1. Disconnect and inspect the passenger air bag assembly yellow connector located behind the glove box assembly.

2. If ok, reconnect the passenger air bag assembly connector.

3. Ignition switch “ON.”

Is DTC B0016 Current?

1. Ignition switch “Off.”

2. Disconnect SRS coil and passenger air bag assembly, yellow connector located at the base of the steering column and behind the glove box assembly.

3. Connect 5-8840-2421-0 SRS driver/passenger load tool and appropriate adapters to SRS coil and passenger air bag assembly harness connectors.

4. Ignition switch “ON.”

Is DTC B0016 current?

Verify repair Go to Step 3

Go to Step 4 Seat passenger air

bag assembly

yellow connector

properly.

Go to Step 7

Go to Step 5 Go to Step 7

Go to Step 6 Ignition switch

“Off.”

Replace the

passenger air bag

assembly.

Go to Step 7

1. Ignition switch “Off.”

2. There has been a decrease in the total circuit resistance of

Replace SRS

harness.

Go to Step 7

Go to Chart A

Page 89

RESTRAINT CONTROL 9A1-19

Step Action Yes No

the passenger inflator deployment loop.

3. Use the h igh res ol uti on ohm m eter m ode o f the D VM w hi le checking circuits “Passenger Bag High” and “Passenger Bag Low”, and SRS control unit connector terminal “48” and “47” to locate the root cause.

Was a fault found?

1. Reconnect all components, ensure all component are properly mounted.

2. Clear diagnostic trouble codes.

Was this step finished?

Repeat the “SRS

Diagnostic System

Check”

Go to Step 7

Page 90

9A1-20 RESTRAINT CONTROL SYSTEM

DTC B0017 (Flash Code 17) Passenger Airbag Squib Circuit High Resistance

Circuit Description

When the ignition switch is turned “ON”, the SRS control unit will perform tests to diagnose critical malfunctions within itself. Upon passing these tests “Ignition 1”, and deployment loop voltages are measured to ensure they are within their respective normal voltage ranges. The SRS control unit then proceeds with the “Resistance Measurement Test”. “Passenger Bag Low” terminal “47” is grounded through a resister and the passenger current source connected to “Passenger Bag High” terminal “48” allows a known amount of current to flow. By monitoring the voltage difference between “Passenger Bag High” and “Passenger Bag Low” the SRS control unit calculates the combined resistance of the passenger air bag assembly, harness wiring circuits “Passenger Bag High” and “Passenger Bag Low” connector terminal contact.

DTC Will Set When

The combined resistance of the passenger air bag assembly, harness wiring circuits “Passenger Bag High” and “Passenger Bag Low”, and connector terminal contact is above a specified value. This test is run once each ignition cycle during the “Resistance Measurement Test” when:

1. No “higher priority faults” are detected during “Turn– ON”,

2. “Ignition 1” voltage is in the specified value.

Action Taken

SRS control unit turns “ON” the “AIR BAG” warning lamp and sets a diagnostic trouble code.

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RESTRAINT CONTROL 9A1-21

DTC Will Clear When

The ignition switch is turned “OFF.”

DTC Chart Test Description

Number(s) below refer to step number(s) on the diagnostic chart:

2. This test determines whether the malfunction is in the SRS control unit.

3. This test verifies proper connection of the yellow connector.

4. This test checks for proper contact and/or corrosion of the yellow connector terminals.

5. The test checks for a malfunctioning passenger ai bag assembly.

6. This test determines whether the malfunction is due to high resistance in the wiring.

DTC B0017 (Flash Code 17) Passenger Airbag Squib Circuit High Resistance

Step Action Yes No

1 Was the “SRS Diagnostic System Check” Performed? Go to Step 2 Go to The “SRS

Diagnostic Aids

n intermittent condition is likely to be caused by a poor connection at the passenger air bag assembly harness connector terminals “1” and “2”, SRS control unit terminal “48” and “47”, or a poor wire to terminal connection in circuits “Passenger Bag High” and “Passenger Bag Low”. This test for this diagnostic trouble code is only run while the “AIR BAG” warning lamp is performing the bulb check. When a scan tool “Clear Codes” command is issued and the malfunction is still present, the DTC will not reappear until the next ignition cycle.

Diagnostic System

Check”

1. Check the passenger air bag squib circuit for open.

2. If the problem found, repair as necessary.

Was a problem found?

1. Ignition switch “Off.”

2. Make sure the passenger air bag assembly yellow connector located behind the glove box assembly is seated properly.

Is the yellow connector connected properly?

1. Disconnect and inspect the passenger air bag assembly yellow connector located behind the glove box assembly.

2. If ok, reconnect the passenger air bag assembly connector.

3. Ignition switch “ON.” Is DTC B0017 current?

1. Ignition switch “Off.”

2. Disconnect SRS coil and passenger air bag assembly, yellow connector located at the base of the steering column and behind the glove box assembly.

3. Connect 5-8840-2421-0 SRS driver / passenger load tool and appropriate adapters to SRS coil and passenger air bag assembly harness connectors.

4. Ignition switch “ON.”

Is DTC B0017 Current?

Verify repair Go to Step 3

Go to Step 4 Seat passenger Air

Bag assembly

yellow connector

properly.

Go to Step 7

Go to Step 5 Go to Step 7

Go to Step 6 Ignition switch

“Off.”

Replace the

passenger air bag

assembly.

Go to Step 7

Page 92

9A1-22 RESTRAINT CONTROL SYSTEM

Step Action Yes No

1. Ignition switch “Off.”

2. There has been an increase in the total circuit resistance of the passenger inflator deployment loop.

3. Use the high resolution ohmmeter mode of the DVM while checking circuits “Pasenger Bag High” and “Passenger Bag Low”, and SRS control unit connector terminal “48” and “47” to locate the root cause.

Was a fault found?

1. Reconnect all components ensure all component are properly mounted.

2. Clear diagnostic trouble codes.

Was This step finished?

Replace SRS

harness.

Go to Step 7

Repeat the “SRS

Diagnostic System

Check”

Go to Chart A

Go to Step 7

Page 93

RESTRAINT CONTROL 9A1-23

DTC B0018 (Flash Code 18) Passenger Airbag Squib Circuit Voltage Range/Performance

Circuit Description

When the ignition switch is turned “ON”, the SRS control unit will perform tests to diagnose critical malfunctions within itself. Upon passing these tests, “Ignition 1”, and deployment loop voltages are measured to ensure they are within their respective normal voltage ranges. The SRS control unit monitors the voltages at “Drive Bag Low” terminal “46” and “Passenger Bag Low” terminal “47” to detect short to ground/+B in the air bag assembly circuits.

DTC Will Set When

Neither of the two air bag assemblies is open. “Ignition 1” is within the normal operating voltage range.

Once these conditions are me and the voltage at “Passenger Bag Low” is out of a specified value, DTC B0018 will set. This test is run once each ignition cycle and “Continuous Monitoring”.

Action Taken

SRS control unit turns “ON” the “AIR BAG” warning lamp and sets a diagnostic trouble code.

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9A1-24 RESTRAINT CONTROL SYSTEM

DTC Will Clear When

This malfunction is no longer occurring and the ignition switch is turned “OFF”.

DTC Chart Test Description

Number(s) below refer to circled number(s) on the diagnostic chart.

2. This test determines whether the SRS control unit is malfunctioning.

3. This test isolates the malfunction to one side of the passenger air bag assembly yellow connector behind glove box compartment.

4. This test determines whether the malfunction is in “Passenger Bag High” circuit.

5. This test determines whether the malfunction is in “Passenger Bag Low” circuit.

6. This test determines whether the malfunction is in “Driver Bag High” circuit.

7. This test determines whether the malfunction is in “Driver Bag Low” circuit.

Diagnostic Aids

n intermittent condition is likely to be caused by a short to ground/+B in the passenger air bag assembly circuit. Inspect circuits “Passenger Bag High” and “Passenger Bag Low” carefully for cutting or chafing. If the wiring pigtail of the passenger air bag assembly is damaged, the component must be replaced.

DTC B0018 (Flash Code 18) Passenger Airbag Squib Circuit Voltage Range/Performance

Step Action Yes No

1 Was the “SRS Diagnostic System Check” performed? Go to Step 2 Go to the “SRS

Diagnostic System

Check”

1. When measurements are requested in this chart use 5-88400285-0 DVM with correct terminal adapter from 5-88400385-0.

2. Ignition switch “OFF.”

3. Ignition switch “ON.”

4. Check the passenger air bag squib circuit for short to voltage, short to ground and open.

Was a problem found?

1. Ignition switch “OFF.”

2. Disconnect passenger air bag assembly yellow connector behind the glove box assembly.

3. Leave driver air bag assembly connected.

4. Connect SRS driver / passenger load tool 5-8840-2421-0 and appropriate adapter to passenger air bag assembly harness connector.

5. Ignition switch “ON.” Is DTC B0018 current?

1. Ignition switch “OFF”.

2. Disconnect SRS driver / passenger load tool

3. Mea su re r esi st an ce o n SRS cont ro l unit h ar ne ss c on ne ct or from terminal “48” to terminal “40” (ground).

Does 5-8840-0285-0 display “OL” (Infinite)?

5 Measure resistance on SRS control unit harness connector from

terminal “47” to terminal “40” (ground). Does 5-8840-0285-0 display “OL” (Infinite)?

Go to Step 3

Go to Step 4 Ignition switch

passenger air bag

Go to Step 5 Replace SRS

Go to Step 6

“OFF.”

Replace

assembly .

Go to Step 8

Harness.

Go to Step 8

Replace SRS

Harness.

Go to Step 8

Page 95

RESTRAINT CONTROL 9A1-25

Step Action Yes No

6 Measure resistance on SRS control unit harness connector from

terminal “48” to terminal “35” (ignition).

Does 5-8840-0285-0 display “OL” (Infinite)?

7 Measure resistance on SRS control unit harness connector from

terminal “47” to terminal “35” (ignition).

Does 5-8840-0285-0 display “OL” (Infinite)?

1. Reconnect all components and ensure all component are properly mounted.

2. Clear diagnostic trouble codes.

Was this step finished?

Go to Step 7

Go to Chart A Replace SRS

Go to the “SRS

Diagnostic system

Check”

Replace SRS

Harness.

Go to Step 8

Harness.

Go to Step 8

Page 96

9A1-26 RESTRAINT CONTROL SYSTEM

DTC B0022 (Flash Code 22) Driver Airbag Squib Circuit Low Resistance

Circuit Description

The SRS control unit then proceeds with the “Resistance Measurement Test” “Driver Bag Low” terminal “46” is grounded through a current sink and the driver current source connected to “Driver Bag High” terminal “45” allows a known amount of current to flow. By monitoring the voltage difference between “Driver Bag High” and “Driver Bag Low” the SRS control unit calculates the combined resistance of the driver ai bag assembly, SRS coil assembly, harness wiring circuits “Driver Bag High” and “Driver Bag Low” and connector terminal contact.

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RESTRAINT CONTROL 9A1-27

DTC Will Set When

The combined resistance of the driver air bag assembly, SRS Coil assembly, harness wiring circuits “Driver Bag High” and “Driver Bag Low”, and connector terminal contact is above a specified value. This test is run once each ignition cycle during the “Resistance Measurement Test” when:

1. No “higher priority faults” are detected during “Turn– ON”

2. “Ignition 1” voltage is in the specified value.

Action Taken

SRS control unit turns “ON” the “AIR BAG” warning lamp and sets DTC B0022.

DTC Will Clear When

The ignition switch is turned “OFF.”

DTC Chart Test Description

Number(s) below refer to circled number(s) on the diagnostic chart:

2. This test determines whether the malfunction is in the SRS control unit.

3. This test verifies proper connection of the yellow connector at the base of the steering column.

4. This test checks for proper operation of the shorting clip in the yellow connector.

5. This test isolate the malfunction to one side of the SRS coil assembly yellow connector located at the base of steering column.

6. This test determines whether the malfunction is due to shortening in the wiring.

7. This test determines whether the malfunction is in the SRS coil assembly or the driver air bag assembly.

Diagnostic Aids

n intermittent condition is likely to be caused by a short between circuit “Driver Bag High” or “Driver Bag Low” or a malfunctioning shorting clip on the driver air bag assembly or SRS coil assembly which would require replacement of the component. The test for this diagnostic trouble code is only run while the “AIR BAG” warning lamp is performing the bulb check. When a scan tool “Clear Codes” command is issued and the malfunction is still present, the DTC will not reappear until the next ignition cycle.

DTC B0022 (Flash Code 22) Driver Airbag Squib Circuit Low Resistance

Step Action Yes No

1 Perform the “SRS Diagnostic System Check.”

Was the “SRS Diagnostic System Check” performed?

1. Check the driver air bag squib circuit for short to voltage or short to ground.

2. If the problem found, repair as necessary.

Was a problem found?

1. Ignition switch “OFF.”

2. Make sure the SRS coil assembly yellow connector located at the base of steering column is seated properly.

Is the connector connected properly?

1. Disconnect and inspect the SRS coil assembly yellow connector located base of steering column.

2. If ok, reconnect the SRS coil assembly yellow connector.

3. Ignition switch “ON.”

Is DTC B0022 current?

Go to Step 2 Go to the “SRS

Diagnostic System

Check”

Verify repair Go to Step 3

Go to Step 4 Seat driver air bag

assembly connector

properly.

Go to Step 8

Go to Step 5 Go to Step 8

Page 98

9A1-28 RESTRAINT CONTROL SYSTEM

Step Action Yes No

1. Ignition switch “OFF.”

2. Disconnect SRS coil and passenger air bag assembly, yellow connector located at the base of steering column and behind the glove box assembly.

3. Connect SRS driver / passenger load tool 5-8840-2421-0 and appropriate adapter to SRS coil and passenger air bag assembly harness connectors.

4. Ignition switch “ON.”

Is DTC B0022 current?

1. Ignition switch “OFF.”

2. There has been a decrease in the total circuit resistance of the driver deployment loop.

3. Use the high resolution ohmmeter mode of the DVM while checking circuits “Driver Bag High” and “Driver Bag Low”, and SRS control unit connector terminal “45” and “46” to locate the root cause.

Was a fault found?

1. Ignition switch “OFF.”

2. Disconnect SRS driver / passenger load tool from driver air bag assembly harness connector.

3. Con ne ct SR S d ri ve r / pa ss en ge r lo ad to ol 5- 88 40- 24 21 -0 to the top of steering column connector.

4. Reconnect SRS coil assembly harness connector as the base of steering column.

5. Ignition switch “ON.”

Is DTC B0022 current?

Go to Step 6 Go to Step 7

Replace SRS

harness.

Go to Step 8

Ignition switch

“off.”

Replace SRS coil

assembly.

Go to Step 8

Go to Chart A

Ignition switch

“OFF.”

Replace driver air

bag assembly.

Go to Step 8

1. Reconnect all components, ensure all component are properly mounted.

2. Clear diagnostic trouble codes.

Was this step finished?

Go to the “SRS

Diagnostic System

Check”

Go to Step 8

Page 99

RESTRAINT CONTROL 9A1-29

DTC B0024 (Flash Code 24) Driver Airbag Squib Circuit Voltage Range/Performance

Circuit Description

The SRS control unit monitors the voltage at “Drive Bag Low” terminal “46” and “Passenger Bag Low” terminal “47” to detect shorts to ground/+B in the air bag assembly circuits.

DTC Will Set When

Neither of the two air bag assemblies is open. “Ignition 1” is within the normal operating voltage range.

This test is run once each ignition cycle and “Continuous Monitoring”. Once these conditions are met and the voltage at “Driver Bag Low” is out of a specified value, DTC B0024 will set.

Action Taken

SRS control unit turns “ON” the “AIR BAG” warning lamp and sets a diagnostic trouble code.

DTC Will Clear When

The malfunction is no longer occurring and the ignition is turned “OFF”.

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9A1-30 RESTRAINT CONTROL SYSTEM

DTC Chart Test Description

Number(s) below refer to step number(s) on the diagnostic chart:

2. This test determines whether the SRS control unit is malfunctioning

3. This test isolates the malfunction to one side of the SRS coil assembly yellow 2–pin connector at the base of the steering column.

4. This test determines whether the malfunction is in “Driver Bag High” circuit.

5. This test determines whether the malfunction is in “Driver Bag Low” circuit.

6. This test determines whether the malfunction is in “Driver Bag High” circuit.

7. This test determines whether the malfunction is in “Driver Bag Low” circuit.

8. This test determines whether the malfunction is in the SRS coil assembly or the driver air bag assembly.

Diagnostic Aids

n intermittent condition is likely to be caused by a short to ground/+B in the driver air bag assembly circuit. Inspect circuits “Driver Bag High” and “Driver Bag Low” carefully for cutting or chafing.

DTC B0024 (Flash Code 24) Driver Airbag Squib Circuit Voltage Range/Performance

Step Action Yes No

1 Was the “SRS Diagnostic System Check” performed? Go to Step 2 Go to the “SRS

Diagnostic System

Check”

1. When measurements are requested in this chart use 5-88400285-0 DVM with correct terminal adapter from 5-88400385-0.

2. Ignition switch “OFF.”

3. Ignition switch “ON.”

4. Check the driver air bag squib circuit for short to voltage or short to ground and open.

Was a problem found?

1. Ignition switch “OFF.”

2. Disconnect SRS coil assembly yellow connector located at base of the steering column. leave passenger air bag assembly connected.

3. Connect SRS driver / passenger load tool 5-8840-2421-0 and appropriate adapter to SRS coil assembly harness connector.

4. ignition switch “ON.”

Is DTC B0024 current?

Go to Step 3

Go to Step 4 Go to Step 8

1. Ignition switch “OFF.”

2. Disconnect SRS control unit.

3. Disconnect SRS driver / passenger load tool.

4. Measure resistance on SRS control unit harness connector “45” to terminal “40” (ground).

Does 5-8840-0285-0 display “OL” (infinite)?

5 Measure resistance on SRS control unit harness connector from

terminal “46” to terminal “40” (ground). Does 5-8840-0285-0 display “OL” (infinite)?

Go to Step 5 Replace SRS

harness.

Go to Step 9

Go to Step 6

Replace SRS

harness.

Go to Step 9

Isuzu TF 2006, TF 2007, TF 2005 Workshop Manual

Specifications and Main Features

Frequently Asked Questions

User Manual