2003 DAEWOO MATIZ Service Repair Manual

8B–22 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO M-150 BL2
D1AB302B
DIAGNOSTIC TROUBLE CODE (DTC) 05
PASSENGER FIRING CIRCUIT, RESISTANCE TOO HIGH
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 firing 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 05 Will Set When

The combined resistance of the passenger airbag
module, the harness wiring, and the connector con-
tacts is above a specified value, as in an open circuit.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–23
DAEWOO M-150 BL2
DTC 05 – Passenger Firing Circuit, Resistance Too High
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.
Is the connector disconnected?


–



Go to Step 2



Go to Step 3

2



1. Reconnect the passenger side airbag 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.
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.
3. Connect an ohmmeter to the terminals on the
SDM side of the wiring harness connector for the
passenger side airbag module.

Refer to ‘‘Diagnostic Illustration 8’’ 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 05 still show as a current fault?


–



Go to Step 5



System OK



5



1. Replace the passenger side airbag 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–24 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO M-150 BL2
D1AB302B
DIAGNOSTIC TROUBLE CODE (DTC) 06
PASSENGER FIRING CIRCUIT, RESISTANCE TOO LOW
Short 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 firing 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 06 Will Set When

The combined resistance of the passenger airbag
module, the harness wiring, and the connector con-
tacts is below a specified value, as in a short circuit
between the wires to the passenger airbag module.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 could deploy the airbag and
cause injury.

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B–25
DAEWOO M-150 BL2
DTC 06 – Passenger Firing Circuit, Resistance Too Low
Step Action Value(s) Yes No





1





1. Disconnect the negative battery cable.
2. Connect an ohmmeter to the terminals of the
wiring harness connector for the passenger
airbag module on the SDM side of the connector.

Refer to ‘‘Diagnostic Illustration 8’’ in this
section.
Does the ohmmeter show the specified value?




∞





Go to Step 2





Go to Step 4




2





1. Replace the SDM.
2. Reconnect the negative battery cable.
3. Set the scan tool to CODE ERASE.
4. Do the diagnostic system check.
Does the code 06 still show as a current fault?




–




Go to Step 3




System OK

3


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

–


Go to
Diagnostic
System Check

–



4




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–26 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO M-150 BL2
D1AB302B
DIAGNOSTIC TROUBLE CODE (DTC) 07
PASSENGER FIRING CIRCUIT, SHORT TO GROUND
Circuit Description
When the ignition switch is turned ON, the sensing and
diagnostic module (SDM) will diagnose any malfunc-
tions within itself.
After passing these tests, the SDM will check the
passenger airbag firing circuit. The SDM allows a very
small amount of current to flow through the circuit. The
SDM monitors the voltage during this check.
DTC 07 Will Set When

The firing circuit is shorted to ground.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.

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B–27
DAEWOO M-150 BL2
DTC 07 Passenger Firing Circuit, Short To Ground
Step Action Value(s) Yes No




1




1. Disconnect the negative battery cable.
2. Wait 1 minute for the SDM capacitor to discharge.
3. Visually inspect the supplemental inflatable
restraints (SIR) wiring harness.
Is there any visible damage to the SIR harness?


–



Go to Step 2



Go to Step 3



2



1. Replace the SIR wiring harness.
2. Reconnect the negative battery cable.
Is the repair complete?

–



Go to
Diagnostic
System Check

–











3











1. Disconnect the electrical connector from the
passenger airbag 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 side air-
bag module.
3. Use an ohmmeter to check the continuity
between ground and one of the terminals at the
SDM side of the wiring harness connector for the
passenger side airbag module.

Refer to ‘‘Diagnostic Illustration 9’’ in this
section.
Is the resistance less than the specified value?









∞










Go to Step 2










Go to Step 4




4




1. Replace the SDM.
2. Reconnect the negative battery cable.
3. Set the scan tool to CODE ERASE.
4. Do the diagnostic system check.
Does the code 07 still show as a current fault?


–



Go to Step 5



System OK

5


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

–


Go to
Diagnostic
System Check

–

8B–28 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)
DAEWOO M-150 BL2
D1AB302B
DIAGNOSTIC TROUBLE CODE (DTC) 08
PASSENGER FIRING CIRCUIT, SHORT TO BATTERY VOLTAGE
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 firing circuit. The SDM allows a very
small amount of current to flow through the circuit. The
SDM monitors the voltage during this check.
DTC 08 Will Set When

The firing circuit is shorted to the voltage.Test Description
Caution: Before testing, disconnect the negative
battery cable. Wait 1 minute for the SDM capacitor
to discharge. The capacitor supplies the reserve
power to deploy the airbags, even if the battery is
disconnected. Unintentional deployment of the air-
bags can cause injury.

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B–29
DAEWOO M-150 BL2
DTC 08 – Passenger Firing Circuit, Short To Battery Voltage
Step Action Value(s) Yes No







1







1. Disconnect the battery negative cable.
2. Wait 1 minute for the SDM capacitor to discharge.

The capacitor supplies reserve power to deploy
the passenger side airbag even if the battery
has been disconnected.
3. Visually inspect the supplemental inflatable
restraints (SIR) wiring harness.
Is there any visible damage to the SIR wiring
harness?





–






Go to Step 2






Go to Step 3



2



1. Replace the SIR wiring harness.
2. Reconnect the negative battery cable.
Is the repair complete?

–



Go to
Diagnostic
System Check

–











3











1. Disconnect the electrical connector for the
passenger airbag 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.
3. Use a multimeter to check the voltage at one of
the terminals on the SDM side of the SIR wiring
harness connector for the passenger airbag
module.

Refer to ‘‘Diagnostic Illustration 10’’ in this
section.
Is the voltage greater than the specified value?









0 v










Go to Step 2










Go to Step 4




4




1. Replace the SDM.
2. Reconnect the negative battery cable.
3. Set the scan tool to CODE ERASE.
4.Do the diagnostic system check.
Does the code 08 still show as a current fault?


–



Go to Step 5



System OK



5



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

–



Go to
Diagnostic
System Check

–