2003 DAEWOO MATIZ Service Repair Manual

8B–46 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO M-150 BL2
D1AB302B
DIAGNOSTIC TROUBLE CODE (DTC) 18
CONNECTION BETWEEN DRIVER FIRING CIRCUIT AND DRIVER
PRETENSIONER CIRCUIT
Open Circuit
Circuit Description
When the ignition switch is turned ON, the sensing and
diagnostic module (SDM) will perform tests to diagnose
any malfunctions within itself.
After passing these tests, the SDM will check the driver
airbag and the driver pretensioner circuit. The SDM al-
lows a very small amount of current to flow through the
circuit. The SDM monitors the circuit resistance during
this check.
DTC 18 Will Set When

Connection between the driver firing circuit and the
driver pretensioner circuit or the SDM internal con-
nection problem may exist.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.
Caution: Never measure the resistance of an airbag
module. If the anti-deployment shorting bar on the
module-side of the connector is not working prop-
erly, the meter’s battery can deploy the airbag and
cause injury.

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B–47
DAEWOO M-150 BL2
DTC 18 – Connection Between Driver Firing Circuit and Driver Pretensioner Circuit
Step Action Value(s) Yes No





1





1. Disconnect the negative battery cable.
2. Wait 1 minute for the SDM capacitor to discharge.
3. Examine the wiring and the connector at the
driver side airbag module and the driver
pretensioner module.
Is the connector disconnected?



–




Go to Step 2




Go to Step 3



2



1. Reconnect the driver side airbag module and the
driver pretensioner module.
2. Reconnect the negative battery cable.
Is the repair complete?

–



Go to
Diagnostic
System Check


–










3











1. Disconnect the electrical connector for the driver
side airbag module and the driver pretensioner
module.
2. Disconnect the electrical connector at the SDM.

The shorting bar at the disconnected SDM
connector will create a complete circuit be-
tween the wires from the driver airbag module
and the driver pretensioner module.
3. Connect an ohmmeter to the terminals on the
SDM side of the wiring harness connector for the
driver pretensioner module.

Refer to ‘‘Diagnostic Illustration 16’’ in this
section.
Does the ohmmeter show the specified value?









≈0











Go to Step 4










Go to Step 6




4




1. Replace the SDM.
2. Reconnect the negative battery cable.
3. Set the scan tool for CODE ERASE.
4. Do the diagnostic system check.
Does the code 18 still show as a current fault?



–




Go to Step 5




System OK

5



1. Replace the driver pretensioner module.
2. Reconnect the negative battery cable.
Is the repair complete?


–



Go to
Diagnostic
System Check


–


6



1. Replace the supplemental inflatable restraints
(SIR) wiring harness.
2. Reconnect the negative battery cable.
Is the repair complete?

–



Go to
Diagnostic
System Check


–

8B–48 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO M-150 BL2
D1AB302B
DIAGNOSTIC TROUBLE CODE (DTC) 19
CONNECTION BETWEEN DRIVER FIRING CIRCUIT AND PASSENGER
PRETENSIONER CIRCUIT
Open Circuit
Circuit Description
When the ignition switch is turned ON, the sensing and
diagnostic module (SDM) will perform tests to diagnose
any malfunctions within itself.
After passing these tests, the SDM will check the driver
airbag and the passenger pretensioner circuit. The SDM
allows a very small amount of current to flow through the
circuit. The SDM monitors the circuit resistance during
this check.
DTC 19 Will Set When

Connection between the drive firing circuit and the
passenger pretensioner circuit or SDM internal con-
nection problem may exist.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.
Caution: Never measure the resistance of an airbag
module. If the anti-deployment shorting bar on the
module-side of the connector is not working prop-
erly, the meter’s battery can deploy the airbag and
cause injury.

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B–49
DAEWOO M-150 BL2
DTC 19 – Connection Between Driver Firing Circuit and Passenger Pretensioner Circuit
Step Action Value(s) Yes No





1





1. Disconnect the negative battery cable.
2. Wait 1 minute for the SDM capacitor to discharge.
3. Examine the wiring and the connector at the
driver side airbag module and the passenger
pretensioner module.
Is the connector disconnected?



–




Go to Step 2




Go to Step 3



2



1. Reconnect the driver side airbag module and the
passenger pretensioner module connector.
2. Reconnect the negative battery cable.
Is the repair complete?

–



Go to
Diagnostic
System Check


–










3











1. Disconnect the electrical connector for the driver
side airbag module and the passenger
pretensioner module.
2. Disconnect the electrical connector at the SDM.

The shorting bar at the disconnected SDM
connector will create a complete circuit be-
tween the wires from the driver airbag module
and the passenger pretensioner module.
3. Connect an ohmmeter to the terminals on the
SDM side of the wiring harness connector for the
passenger pretensioner module.

Refer to ‘‘Diagnostic Illustration 19’’ in this
section.
Does the ohmmeter show the specified value?









≈0











Go to Step 4










Go to Step 6




4




1. Replace the SDM.
2. Reconnect the negative battery cable.
3. Set the scan tool for CODE ERASE.
4. Do the diagnostic system check.
Does the code 19 still show as a current fault?



–




Go to Step 5




System OK

5



1. Replace the passenger pretensioner module.
2. Reconnect the negative battery cable.
Is the repair complete?


–



Go to
Diagnostic
System Check


–


6



1. Replace the supplemental inflatable restraints
(SIR) wiring harness.
2. Reconnect the negative battery cable.
Is the repair complete?

–



Go to
Diagnostic
System Check


–

8B–50 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO M-150 BL2
D1AB302B
DIAGNOSTIC TROUBLE CODE (DTC) 20
CONNECTION BETWEEN PASSENGER FIRING CIRCUIT AND DRIVER
PRETENSIONER CIRCUIT
Open Circuit
Circuit Description
When the ignition switch is turned ON, the sensing and
diagnostic module (SDM) will perform tests to diagnose
any malfunctions within itself.
After passing these tests, the SDM will check the
passenger airbag and the driver pretensioner circuit.
The SDM allows a very small amount of current to flow
through the circuit. The SDM monitors the circuit resist-
ance during this check.
DTC 20 Will Set When

Connection between the passenger firing circuit and
the driver pretensioner circuit or SDM internal con-
nection problem may exist.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.
Caution: Never measure the resistance of an airbag
module. If the anti-deployment shorting bar on the
module-side of the connector is not working prop-
erly, the meter’s battery can deploy the airbag and
cause injury.

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B–51
DAEWOO M-150 BL2
DTC 20 – Connection Between Passenger Firing Circuit and Driver Pretensioner Circuit
Step Action Value(s) Yes No





1





1. Disconnect the negative battery cable.
2. Wait 1 minute for the SDM capacitor to discharge.
3. Examine the wiring and the connector at the
passenger side airbag module and the driver
pretensioner module.
Is the connector disconnected?



–




Go to Step 2




Go to Step 3



2



1. Reconnect the passenger side airbag module and
the driver pretensioner module connector.
2. Reconnect the negative battery cable.
Is the repair complete?

–



Go to
Diagnostic
System Check


–










3











1. Disconnect the electrical connector for the
passenger side airbag module and the driver
pretensioner module.
2. Disconnect the electrical connector at the SDM.

The shorting bar at the disconnected SDM
connector will create a complete circuit be-
tween the wires from the passenger airbag
module and the driver pretensioner module.
3. Connect an ohmmeter to the terminals on the
SDM side of the wiring harness connector for the
driver pretensioner module.

Refer to ‘‘Diagnostic Illustration 16’’ in this
section.
Does the ohmmeter show the specified value?









≈0











Go to Step 4










Go to Step 6




4




1. Replace the SDM.
2. Reconnect the negative battery cable.
3. Set the scan tool for CODE ERASE.
4. Do the diagnostic system check.
Does the code 20 still show as a current fault?



–




Go to Step 5




System OK

5



1. Replace the driver pretensioner module.
2. Reconnect the negative battery cable.
Is the repair complete?


–



Go to
Diagnostic
System Check


–


6



1. Replace the supplemental inflatable restraints
(SIR) wiring harness.
2. Reconnect the negative battery cable.
Is the repair complete?

–



Go to
Diagnostic
System Check


–

8B–52 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO M-150 BL2
D1AB302B
DIAGNOSTIC TROUBLE CODE (DTC) 21
CONNECTION BETWEEN PASSENGER FIRING CIRCUIT AND PASSENGER
PRETENSIONER CIRCUIT
Open Circuit
Circuit Description
When the ignition switch is turned ON, the sensing and
diagnostic module (SDM) will perform tests to diagnose
any malfunctions within itself.
After passing these tests, the SDM will check the
passenger airbag and the passenger circuit. The SDM
allows a very small amount of current to flow through the
circuit. The SDM monitors the circuit resistance during
this check.
DTC 21 Will Set When

Connection between the passenger firing circuit and
the passenger pretensioner circuit or SDM internal
connection problem may exist.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.
Caution: Never measure the resistance of an airbag
module. If the anti-deployment shorting bar on the
module-side of the connector is not working prop-
erly, the meter’s battery can deploy the airbag and
cause injury.

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B–53
DAEWOO M-150 BL2
DTC 21 – Connection Between Passenger Firing Circuit and Passenger Pretensioner
Circuit
Step Action Value(s) Yes No





1





1. Disconnect the negative battery cable.
2. Wait 1 minute for the SDM capacitor to discharge.
3. Examine the wiring and the connector at the
passenger side airbag module and the passenger
pretensioner module.
Is the connector disconnected?



–




Go to Step 2




Go to Step 3



2



1. Reconnect the passenger side airbag module and
the passenger pretensioner module connector.
2. Reconnect the negative battery cable.
Is the repair complete?

–



Go to
Diagnostic
System Check


–











3












1. Disconnect the electrical connector for the
passenger side airbag module and the passenger
pretensioner module.
2. Disconnect the electrical connector at the SDM.

The shorting bar at the disconnected SDM
connector will create a complete circuit be-
tween the wires from the passenger airbag
module and the passenger pretensioner mod-
ule.
3. Connect an ohmmeter to the terminals on the
SDM side of the wiring harness connector for the
passenger pretensioner module.

Refer to ‘‘Diagnostic Illustration 19’’ in this
section.
Does the ohmmeter show the specified value?










≈0












Go to Step 4











Go to Step 6




4




1. Replace the SDM.
2. Reconnect the negative battery cable.
3. Set the scan tool for CODE ERASE.
4. Do the diagnostic system check.
Does the code 21 still show as a current fault?


–



Go to Step 5



System OK



5



1. Replace the passenger pretensioner module.
2. Reconnect the negative battery cable.
Is the repair complete?

–



Go to
Diagnostic
System Check

–



6



1. Replace the supplemental inflatable restraints
(SIR) wiring harness.
2. Reconnect the negative battery cable.
Is the repair complete?

–



Go to
Diagnostic
System Check


–