Isuzu KB P190. Manual — part 1409

SUPPLEMENTAL RESTRAINT SYSTEM 9A-1

SECTION 9A

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

TABLE OF CONTENTS

PAGE

Service Precaution . . . . . . . . . . . . . . . . . . . . . . . . . ... 9A- 4

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

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

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

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

SRS Component And Wiring Location View . . . . . . . . . . . . . . . .. 9A- 10

Component Description . . . . . . . . . . . . . . . . . . . . . . . ... 9A- 14

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

"SRS" Warning Lamp . . . . . . . . . . . . . . . . . . . . . . . .. 9A- 14

SRS Coil Assembly . . . . . . . . . . . . . . . . . . . . . . . . .. 9A- 15

Air Bag Assemblies. . . . . . . . . . . . . . . . . . . . . . . . .. 9A- 15

Steering Column . . . . . . . . . . . . . . . . . . . . . . . . . .. 9A- 16

Knee Bolster . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 16

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 16

Diagnosis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 9A- 18

Diagnostic Trouble Codes. . . . . . . . . . . . . . . . . . . . . ... 9A- 18

Scan Tool Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . 9A- 18

Use Of Special Tools . . . . . . . . . . . . . . . . . . . . . . . ... 9A- 18

SRS Connector Body Face Views . . . . . . . . . . . . . . . . . . . ...9A- 19

Repairs And Inspections Required After An Accident . . . . . . . . . . . ..9A- 20

Accident With Deployment-Component Replacement And Inspections . . . . 9A- 20

Accident With or Without Deployment-Component Inspection . . . . . . ... 9A- 20

SRS Control Unit Replacement Guidelines . . . . . . . . . . . . . . ... 9A- 20

Wiring Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 20

SRS Connector (Plastic Body And Terminal Metal Pin) Damage. . . . . . . 9A- 20

SRS Wire Pigtail Damage . . . . . . . . . . . . . . . . . . . . . . 9A- 20

PAGE 1 OF 3

9A-2 SUPPLEMENTAL RESTRAINT SYSTEM

PAGE

On-Vehicle Service . . . . . . . . . . . . . . . . . . . . . . . . . ... 9A- 21

Service Precaution. . . . . . . . . . . . . . . . . . . . . . . . ... 9A- 21

Disabling The SRS . . . . . . . . . . . . . . . . . . . . . . . . ... 9A- 21

Enabling The SRS . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 21

Handling / Installation / Diagnosis. . . . . . . . . . . . . . . . . . .. 9A- 21

Air Bag Assembly Handling / Shipping / Scrapping . . . . . . . . . . . . .. 9A- 22

Live (Undeployed) Air Bag Assembly. . . . . . . . . . . . . . . . . . 9A- 22

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

Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 22

Deployed Air Bag Assembly (Driver Side). . . . . . . . . . . . . . . .. 9A- 22

Air Bag Assembly Scrapping Procedure. . . . . . . . . . . . . . . . 9A- 23

Deployment Outside Vehicle (Driver Air Bag Assembly). . . . . . . . . .. 9A- 23

Deployment Outside Vehicle (Passenger Air Bag Assembly) . . . . . . . .. 9A- 26

Deployment Inside Vehicle (Vehicle Scrapping Procedure). . . . . . . . . 9A- 28

Deployed Air Bag Assembly Handling . . . . . . . . . . . . . . . . ... 9A- 31

Service Precautions for SRS Component Service . . . . . . . . . . . . . . 9A- 32

Disabling The SRS . . . . . . . . . . . . . . . . . . . . . . . . ... 9A- 32

Enabling The SRS . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 32

Handling / Installation / Diagnosis. . . . . . . . . . . . . . . . . . .. 9A- 32

Inspections Required After An Accident. . . . . . . . . . . . . . . . 9A- 33

SRS Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . ... 9A- 33

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 33

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 34

SRS Control Unit. . . . . . . . . . . . . . . . . . . . . . . . . . ... 9A- 35

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

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

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 35

Driver Air Bag Assembly . . . . . . . . . . . . . . . . . . . . . . . .. 9A- 37

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

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

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 37

PAGE 2 OF 3

SUPPLEMENTAL RESTRAINT SYSTEM 9A-3

PAGE

Steering Wheel. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9A- 38

Service Precautions . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 38

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 38

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

SRS Coil Assembly. . . . . . . . . . . . . . . . . . . . . . . . . ... 9A- 39

Service Precautions . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 39

Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 9A- 39

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 9A- 39

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

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

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

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 40

Passenger Air Bag Assembly . . . . . . . . . . . . . . . . . . . . . .. 9A- 41

Service Precautions . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 41

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 41

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 42

Pretensioner Seat Belt (If so equipped) . . . . . . . . . . . . . . . . . .. 9A- 43

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 43

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 43

Main Data and Specifications . . . . . . . . . . . . . . . . . . . . . .. 9A- 44

Fastener Tightening Specification. . . . . . . . . . . . . . . . . . .. 9A- 44

Special Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9A- 45

PAGE 3 OF 3

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 A SERVICE ON, OR NEAR, THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING A 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 UNNECESSARY 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/GM will call out those fasteners that require
a replacement after removal. ISUZU/GM 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.

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 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.

Restraint Devices

RTW79ASH000801

Legend

(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.

827RW005