Daewoo Matiz (2003 year). Manual - part 206

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 5

D

Sensing and diagnostic module.

D

Steering column clock spring.

D

Wiring harness.

D

SIR malfunction warning lamp.

D110B001

GENERAL PRECAUTIONS

The supplemental inflatable restraints (SIR) warning
lamp must illuminate when the ignition is switched ON,
and then turn OFF after approximately 4 seconds.

There is a fault in the airbag system if

D

The warning lamp does not turn OFF.

D

The warning lamp illuminates while the vehicle is in
operation.

If the warning lamp indicates there is a fault in the airbag
system, assume that the SIR system may not be
functional.

Caution: Failure to follow all service procedures in
the correct sequence can cause the airbag system to
deploy unexpectedly and possibly cause a serious
injury.

Only trained personnel at franchised Daewoo dealers
and authorized Daewoo service dealerships may service
the airbag system.

Never attempt to disassemble, repair, or reuse the

D

Airbag modules.

D

Clock spring.

D

Sensing and diagnostic module.

D

Wiring harness.

When making SIR repairs,

D

Inspect any SIR part before it is installed.

D

Use only new parts.

D

Do not install used SIR parts from other vehicles.

D

Do not install any part that has been dropped or that
has dents, cracks, or other defects.

AIRBAG DEPLOYMENT CONDITION

Airbag is designed to deploy under 30

_

 left/right angle

barrier and above 25 km/h (15 mph) speed.

Concrete Barrier Deployment Condition

In case of the 0

_

 frontal concrete battier, airbag may

deploy above 25 km/h (15 mph) speed.

8B – 6 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)

D110B002

AIRBAG DEPLOYMENT PROCEDURE

1. Non–Deployment condition

a. Initiator

b. Piston

c. Safety disc

d. Compressed Ar gas

D110B003

2. When crashing, firing current flows from the SDM to

the initiator.

3. Initiator is burning and the inside pressure is increas-

ing and the piston hits the safety disc.

D110B004

4. Safety disc is broken and the compressed Ar gas is

spouted out.

D110B005

5. Compressed Ar gas and the burned initiator are car-

bureted. And the airbag is deployed.

 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 7

COMPONENT LOCATOR

SIR COMPONENT

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

D110B401

1. Driver Airbag Module
2. Passenger Airbag Module
3. Clock Spring

4. Sensing and Diagnostic Module (SDM)
5. Wiring Harness

8B – 8 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)

DIAGNOSTIC INFORMATION AND PROCEDURES

D110B009A

BULB CHECK

As soon as the operating voltage is applied to the sens-
ing and diagnostic module (SDM) ignition input, the
SDM activates the warning lamp for a bulb check.

The SDM turns the lamp ON for 4 seconds, and then the
SDM turns the lamp OFF.

During the bulb check, the SDM is not ready to detect a
crash or deploy the supplemental inflatable restraints.

FAULT INDICATION

The sensing and diagnostic module records the sys-
tem’s faults in two categories:

D

Current faults and the fault code appears “Axx” on the
scan tool display.

D

Historic faults, which are those that were detected in
the past, but are no longer active. And the fault code
appears “Sxx” on the scan tool display.

The warning lamp:

D

Indicates a fault as soon as it occurs.

D

Stays ON, even if a fault is no longer active.

A scan tool connected to the data link connector (DLC):

D

Reveals the fault codes.

D

Receives serial data transmission through the termi-
nal J (13) of the DLC.

D

Receives ground through the terminal A (4) of the
DLC.

CLEARING FAULT CODES

When the sensing and diagnostic module (SDM) re-
ceives the CODE ERASE command from the scan tool,
the SDM:

D

Clears the entire fault memory.

D

Turns OFF the warning lamp.

D

Resets for fault detection.

External Fault

Service personnel can reset the SDM and turn OFF the
warning lamp if the fault is an external fault.

Internal Fault

An internal fault of the SDM or a CRASH RECORDED
fault code cannot be reset.

In the case of an internal fault of the SDM or a CRASH
RECORDED fault code, the SDM must be replaced.

Voltage-Low Fault

The SDM will turn OFF the VOLTAGE LOW fault as
soon as the voltage recovers.

MICROPROCESSOR –
INDEPENDENT LAMP ACTIVATION

If the sensing and diagnostic module (SDM) electrical
connector is not properly attached, the SDM cannot
function and cannot control the warning lamp.

If this fault is present, the warning lamp will operate in-
dependently from the SDM through the use of shorting
bars that are built into the SDM connector.