Daewoo Matiz (2003 year). Manual - part 205

SECTION 8B

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)

CAUTION: Disconnect the negative battery cable before removing or installing any electrical unit or when a
tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable
will help prevent personal injury and damage to the vehicle. The ignition must also be in B unless otherwise
noted.

TABLE OF CONTENTS

Description and Operation

8B-3

. . . . . . . . . . . . . . . . . . 

Airbag Module

8B-3

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

Sensing and Diagnostic Module (SDM)

8B-3

. . . . . . . 

SIR Warning Lamp

8B-3

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

Clock Spring

8B-4

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

Wiring Harness/Connectors

8B-4

. . . . . . . . . . . . . . . . . 

SIR System

8B-4

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

General Precautions

8B-5

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

Airbag Deployment Condition

8B-5

. . . . . . . . . . . . . . . 

Airbag Deployment Procedure

8B-6

. . . . . . . . . . . . . . 

Component Locator

8B-7

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

SIR Component

8B-7

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

Diagnostic Information and Procedures

8B-8

. . . . . 

Bulb Check

8B-8

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

Fault Indication

8B-8

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

Clearing Fault Codes

8B-8

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

Microprocessor – Independent Lamp

Activation

8B-8

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

System Check

8B-10

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

Fault Codes

8B-12

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

DTC 01 Driver Firing Circuit, 

Resistance Too High

8B-14

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

DTC 02 Driver Firing Circuit, 

Resistance Too Low

8B-16

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

DTC 03 Driver Firing Circuit,

Short To Ground

8B-18

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

DTC 04 Driver Firing Circuit,

Short To Battery Voltage

8B-20

. . . . . . . . . . . . . . . . 

DTC 05 Passenger Firing Circuit,

Resistance Too High

8B-22

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

DTC 06 Passenger Firing Circuit,

Resistance Too Low

8B-24

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

DTC 07 Passenger Firing Circuit,

Short To Ground

8B-26

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

DTC 08 Passenger Firing Circuit,

Short To Battery Voltage

8B-28

. . . . . . . . . . . . . . . . 

DTC 09 Driver Pretensioner Circuit,

Resistance Too High

8B-30

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

DTC 10 Driver Pretensioner Circuit,

Resistance Too Low

8B-32

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

DTC 11 Driver Pretensioner Circuit,

Short to Ground

8B-34

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

DTC 12 Driver Pretensioner Circuit,

Short to Battery Voltage

8B-36

. . . . . . . . . . . . . . . . . 

DTC 13 Passenger Pretensioner Circuit,

Resistance Too High

8B-38

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

DTC 14 Passenger Pretensioner Circuit,

Resistance Too Low

8B-40

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

DTC 15 Passenger Pretensioner Circuit,

Short to Ground

8B-42

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

DTC 16 Passenger Pretensioner Circuit,

Short to Battery Voltage

8B-44

. . . . . . . . . . . . . . . . . 

DTC 18 Connection Between Driver Firing 

Circuit and Driver Pretensioner Circuit

8B-46

. . . . . 

DTC 19 Connection Between Driver Firing

Circuit and Passenger Pretensioner Circuit 8B-48

DTC 20 Connection Between Passenger Firing

Circuit and Driver Pretensioner Circuit

8B-50

. . . . . 

DTC 21 Connection Between Passenger Firing

Circuit and Passenger Pretensioner Circuit 8B-52

DTC 22 Connection Between Driver Pretensioner

Circuit and Passenger Pretensioner Circuit 8B-54

DTC 23 Ignition Input Circuit, Voltage

Too High

8B-56

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

DTC 24 Ignition Input Circuit, Voltage

Too Low

8B-58

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

DTC 25 Warning Lamp Failure

8B-60

. . . . . . . . . . . . . 

DTC 31 SDM Internal Fault

8B-63

. . . . . . . . . . . . . . . . 

DTC 32 SDM Crash Recorded

8B-63

. . . . . . . . . . . . . 

Diagnostic Illustration 1

8B-63

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

Diagnostic Illustration 2

8B-64

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

Diagnostic Illustration 3

8B-64

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

Diagnostic Illustration 4

8B-64

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

Diagnostic Illustration 5

8B-64

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

Diagnostic Illustration 6

8B-65

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

Diagnostic Illustration 7

8B-65

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

8B – 2 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)

Diagnostic Illustration 8

8B-65

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

Diagnostic Illustration 9

8B-65

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

Diagnostic Illustration 10

8B-66

. . . . . . . . . . . . . . . . . . 

Diagnostic Illustration 11

8B-66

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

Diagnostic Illustration 12

8B-66

. . . . . . . . . . . . . . . . . . 

Diagnostic Illustration 13

8B-66

. . . . . . . . . . . . . . . . . . 

Diagnostic Illustration 14

8B-67

. . . . . . . . . . . . . . . . . . 

Diagnostic Illustration 15

8B-67

. . . . . . . . . . . . . . . . . . 

Diagnostic Illustration 16

8B-67

. . . . . . . . . . . . . . . . . . 

Diagnostic Illustration 17

8B-67

. . . . . . . . . . . . . . . . . . 

Diagnostic Illustration 18

8B-68

. . . . . . . . . . . . . . . . . . 

Diagnostic Illustration 19

8B-68

. . . . . . . . . . . . . . . . . . 

Diagnostic Illustration 20

8B-68

. . . . . . . . . . . . . . . . . . 

Diagnostic Illustration 21

8B-68

. . . . . . . . . . . . . . . . . . 

Repair Instructions

8B-69

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

On-Vehicle Service

8B-69

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

Driver Airbag Module

8B-69

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

Clock Spring

8B-70

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

Passenger Airbag Module

8B-71

. . . . . . . . . . . . . . . . . 

Sensing and Diagnostic Module (SDM)

8B-72

. . . . . . 

Airbag Module Deployment (In Vehicle)

8B-74

. . . . . . 

Airbag Module Deployment (Outside

of Vehicle)

8B-76

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

Deployed Airbag Module Disposal Procedure 8B-76

Specifications

8B-78

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

Fastener Tightening Specifications

8B-78

. . . . . . . . . . 

Special Tools and Equipment

8B-78

. . . . . . . . . . . . . . 

Special Tools Table

8B-78

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

Schematic and Routing Diagrams

8B-79

. . . . . . . . . . 

Supplemental Inflatable Restraints (SIR) 

Electrical Schematic

8B-79

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

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 3

DESCRIPTION AND OPERATION

(Left–Hand Drive Shown, Right–Hand Drive Similar)

AIRBAG MODULE

Driver Airbag Module

Caution: Tampering with the driver side airbag
module creates the risk of an injury from an unex-
pected deployment. Therefore, the driver side air-
bag module should never be disassembled.

The driver airbag module is under the center pad on the
steering wheel.

The driver airbag module contains an ignitor charge and
a gas generator to inflate the folded airbag.

D110B006

Passenger Airbag Module

Caution: Tampering with the passenger side airbag
module creates the risk of an injury from an unex-
pected deployment. Therefore, the passenger side
airbag module should never be disassembled.

The passenger airbag module is on the passenger side
of the instrument panel.

The passenger airbag module contains an ignitor charge
and a gas generator to inflate the folded airbag.

SENSING AND DIAGNOSTIC
MODULE (SDM)

The SDM

D

Has no user-serviceable parts.

D

Is under the front console assembly.

D

Continuously monitors the system components.

D

Records any faults which are discovered.

D

Illuminates a warning lamp that alerts the driver to
any faults.

D

Allows the fault codes to be retrieved with a scan tool.

The SDM controls the deployment of the airbag system
through the use of the

D

Arming sensor.

D

Capacitor.

D

Crash sensor, or accelerometer.

D110B007

Arming Sensor

The arming sensor is safety device made up of a dual-
contact, electro-mechanical switch that:

D

Acts independently of the electronic components.

D

Keeps the firing circuits for the airbags unarmed un-
der normal driving conditions.

D

Allows the airbags to deploy under the required
conditions.

Capacitor

The capacitor provides reserve power.

Crash Sensor

The crash sensor, or accelerometer, electronically rep-
resents the acceleration or deceleration of the vehicle
during a frontal impact. In this electronic representation,
the electrical signal is proportional to the acceleration or
deceleration of the vehicle.

SIR WARNING LAMP

The supplemental inflatable restraints (SIR) system in-
cludes a self-diagnostic function.

8B – 4 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)

If there is a failure of the sensing and diagnostic module
or the external circuits, the SIR warning lamp in the in-
strument cluster turns ON.

As a system check, the SIR warning lamp also turns ON
when the ignition is first switched to the ON position.

Correct Functioning

The system is working properly if:

D

The SIR warning lamp turns OFF after approximately
four seconds.

Faulty Functioning

The system is not working properly, meaning one of the
SIR components or the wiring connector is faulty, if:

D

The SIR warning lamp fails to turn ON when the
ignition is first switched ON.

D

The SIR warning lamp remains ON.

D110B009A

CLOCK SPRING

The clock spring:

D

Is on the steering column.

D

Contains a coil that is the electrical contact between
the steering column wiring harness and the driver
side airbag module.

D

Is part of the circuit for the horn.

Notice: Turning the steering wheel more than three and
one-quarter turns may damage the clock spring.

Turning the steering wheel:

D

In one direction tightens the coil.

D

In the opposite direction loosens the coil.

D

More than three and one-quarter turns may damage
the clock spring.

Caution: Disassembling the clock spring can cause
injury and vehicle damage.

The clock spring should never be disassembled.

The clock spring must be replaced if the airbags have
been deployed.

D110B008A

WIRING HARNESS/CONNECTORS

The connector for the sensing and diagnostic module
(SDM) has a built-in shorting bar that will turn ON the
warning lamp if there is a poor connection at the SDM.

As an anti-deployment mechanism, additional shorting
bars are in the

D

Connector for the clock spring at the lower steering
column.

D

Passenger airbag module connector.

D

SDM connector.

When these connectors are separated, the shorting
bars will short circuit any current which is applied, pre-
venting the current from reaching the airbag modules.

SIR SYSTEM

The supplemental inflatable restraints (SIR) system is a
safety device used in conjunction with the seat belts.

The airbag does not replace the function of the seat belt.
The driver and the passengers must always fasten their
seat belts and adjust them for a proper fit.

The SIR is designed to protect the driver and the front
seat passenger in the event of a significant frontal im-
pact to the vehicle. The airbags deploy if the force is ap-
plied from a direction within 30 degrees of the vehicle’s
centerline and above 25 km/h (15 mph) speed.

The SIR consists of a

D

Driver airbag module.

D

Passenger airbag module.