2003 DAEWOO MATIZ Service Repair Manual

8B–62 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO M-150 BL2
DTC 25 – Warning Lamp Failure (Cont’d)
Step Action Value(s) Yes No



11



1. Turn the ignition ON.
2. Using a multimeter, check the voltage at the fuse
F1.
Does the multimeter show the specified value?

11–14 v


Go to Step 13


Go to Step 12


12



Repair the open power supply circuit for the fuse F1.
Is the repair complete?

–



Go to
Diagnostic
System Check

–




13




1. Disconnect the connector C208.
2. Turn the ignition ON.
3. Using a multimeter, check the voltage on the
instrument harness side of the terminal 3 of the
connector C208.
Does the multimeter show the specified value?



11–14 v




Go to Step 15




Go to Step 14




14





1. Check the warning lamp bulb.
2. Replace the warning lamp bulb, if needed.
3. If the bulb is good, repair the open circuit between
the fuse F1 and the terminal 3 of the connector
C208.
Is the repair complete?




–





Go to
Diagnostic
System Check




–



15




1. Disconnect the negative battery terminal.
2. Wait at least 1 minute before proceeding.
3. Replace the SIR wiring harness.
Is the repair complete?


–



System OK



–

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B–63
DAEWOO M-150 BL2
DIAGNOSTIC TROUBLE CODE (DTC) 31
SDM INTERNAL FAULT
Circuit Description
When the ignition switch is turned ON, the sensing and
diagnostic module (SDM) will perform tests to diagnose
malfunctions within itself.
DTC 31 Will Set When

The SDM does not pass the internal tests.Test Description
Caution: Before testing, disconnect the negative
battery cable. Wait 1 minute for the SDM capacitor
to discharge. The capacitor supplies reserve power
to deploy the airbags, even if the battery is discon-
nected. Unintentional deployment of the airbags
can cause injury.
DTC 31 – SDM Internal Fault
Step Action Value(s) Yes No

1



1. Disconnect the negative battery cable.
2. Replace the SDM.
Is the repair complete?

–



Go to
Diagnostic
System Check

–
DIAGNOSTIC TROUBLE CODE (DTC) 32
SDM CRASH RECORDED
Circuit Description
When the ignition switch is turned ON, the sensing and
diagnostic module (SDM) will perform tests to diagnose
any malfunctions within itself.
DTC 32 Will Set When

The SDM has previously detected a crash.Test Description
Caution: Before testing, disconnect the negative
battery cable. Wait 1 minute for the SDM capacitor
to discharge. The capacitor supplies reserve power
to deploy the airbags, even if the battery is discon-
nected. Unintentional deployment of the airbags
can cause injury.
DTC 32 – SDM Crash Recorded
Step Action Value(s) Yes No

1



1. Disconnect the negative battery cable.
2. Replace the SDM.
Is the repair complete?


–



Go to
Diagnostic
System Check


–
D110B303
Caution: Do not use these illustrations to trouble-
shoot without consulting the diagnostic trouble
code (DTC) charts. The DTC charts give additional
safety precautions and detailed instructions for
each test. Failure to follow the proper precautions
can result in injury from unintended airbag deploy-
ment.
DIAGNOSTIC ILLUSTRATION 1
Checking the continuity between the terminal 9 of the
sensing and diagnostic module and the terminal J (13) of
the assembly line diagnostic link.

8B–64 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO M-150 BL2
D110B304
DIAGNOSTIC ILLUSTRATION 2
Checking the continuity on the instrument harness side
between the terminal J (13) of the assembly line diag-
nostic link and the terminal 4 of the connector C208.
D110B305
DIAGNOSTIC ILLUSTRATION 3
Measuring the wiring harness for the continuity of the
driver side airbag module circuit.
D110B306
DIAGNOSTIC ILLUSTRATION 4
Checking the continuity of the driver airbag circuit on the
sensing and diagnostic module (SDM) side of the clock
spring connector.
D110B307
DIAGNOSTIC ILLUSTRATION 5
Checking the driver airbag circuit for a short to ground
with the sensing and diagnostic module disconnected.

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B–65
DAEWOO M-150 BL2
D110B308
DIAGNOSTIC ILLUSTRATION 6
Checking the driver airbag circuit for a short to voltage.
D110B309
DIAGNOSTIC ILLUSTRATION 7
Checking the clock spring connector for a short to volt-
age on the sensing and diagnostic module side.
D110B310
.
DIAGNOSTIC ILLUSTRATION 8
Checking the passenger airbag circuit continuity on the
sensing and diagnostic module side of the connector.
D110B311
DIAGNOSTIC ILLUSTRATION 9
Checking the passenger airbag circuit for a short to
ground.

8B–66 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO M-150 BL2
D110B311
DIAGNOSTIC ILLUSTRATION 10
Checking the passenger airbag circuit for a short to
voltage.
D110B312
DIAGNOSTIC ILLUSTRATION 11
Checking the sensing and diagnostic module voltage
supply at the terminal 5.
D110B313
DIAGNOSTIC ILLUSTRATION 12
Checking the voltage supply on the instrument harness
side at the terminal 2 of the connector C208.
D110B314
DIAGNOSTIC ILLUSTRATION 13
Checking for a short to ground on the sensing and diag-
nostic module side of the supplemental inflatable re-
straints harness at the terminal 3 of the connector C208.

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B–67
DAEWOO M-150 BL2
D110B315
DIAGNOSTIC ILLUSTRATION 14
Checking for a short to ground in the instrument harness
on the instrument harness side at the terminal 3 of the
connector C208.
D110B316
DIAGNOSTIC ILLUSTRATION 15
Checking the voltage of the warning lamp circuit on the
instrument harness side at the terminal 3 of the connec-
tor C208.
D110B310
.
DIAGNOSTIC ILLUSTRATION 16
Checking the driver seat belt pretensioner circuit conti-
nuity on the sensing and driagnostic module side of the
connector.
D110B311
DIAGNOSTIC ILLUSTRATION 17
Checking the driver seat belt pretensioner circuit for a
short to ground.

8B–68 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO M-150 BL2
D110B311
DIAGNOSTIC ILLUSTRATION 18
Checking the driver seat belt pretensioner circuit for a
short to voltage.
D110B310
.
DIAGNOSTIC ILLUSTRATION 19
Checking the passenger seat belt pretensioner circuit
continuity on the sensing and driagnostic module side of
the connector.
D110B311
DIAGNOSTIC ILLUSTRATION 20
Checking the passenger seat belt pretensioner circuit
for a short to ground.
D110B311
DIAGNOSTIC ILLUSTRATION 21
Checking the passenger seat belt pretensioner circuit
for a short to voltage.

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B–69
DAEWOO M-150 BL2
REPAIR INSTRUCTIONS
ON–VEHICLE SERVICE
D110B501
DRIVER AIRBAG MODULE
(Left–Hand Drive Shown, Right–Hand
Drive Similar)
Tool Required
DS 401 Torx Bolt Wrench
Removal Procedure
1. Disconnect the negative battery cable.
2. Position the steering wheel straight ahead.
3. Remove the driver airbag module mounting bolts.

Remove the airbag module bolt cover (1).

Remove the airbag module torx bolt using a torx
bolt wrench DS 401.
a. Airbag module torx bolt.
D110B502
Caution: When handling an airbag module, always
keep the top of the unit facing upward. This leaves
room for the module to expand if the module unex-
pectedly deploys. Without room for expansion, a
module suddenly propelled toward a person or ob-
ject can cause injury or vehicle damage.
4.Remove the driver airbag module.

Disconnect the driver airbag module connector (1).

Disconnect the horn terminal connector (2).

Remove the driver airbag module (3).
15 Nm
D1AB503A
Installation Procedure
Caution: When removing an airbag module or han-
dling a new airbag module, always keep the top of
the unit facing upward. This leaves room for the
module to expand if the module unexpectedly de-
ploys. Without room for expansion, a module sud-
denly propelled toward a person or object can
cause injury or vehicle damage.
1. Install the driver airbag module.
2. Connect the connectors to the horn terminal and the
driver airbag module.
3. Install the driver airbag module torx bolt using a torx
bolt wrench DS 401.
Tighten
Tighten the torx bolt to 15 Nm (11 lb-ft)
4. Connect the negative battery cable.