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Daewoo Matiz (2003 year). Manual - part 210

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 21

DTC 04 – Driver Firing Circuit, Short To Battery Voltage

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Step

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Action

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Value(s)

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Yes

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Visually inspect the supplemental inflatable
restraints (SIR) harness for damage.
Is there any visible damage to the SIR harness?

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Go to Step 2

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Go to Step 3

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

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–

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Go to

Diagnostic

System Check

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1. Remove the driver airbag module.
2. Place the driver airbag module in a secure

position with the decorative surface facing
upward.

3. 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.

4. Use a multimeter to check the voltage at one of

the terminals on the wiring harness connector for
the driver airbag module.

Refer to ‘‘Diagnostic Illustration 6’’ in this
section.

Is the voltage greater than the specified value?

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0 v

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Go to Step 6

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Go to Step 4

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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 04 still show as a current fault?

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Go to Step 5

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System OK

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

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–

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Go to

Diagnostic

System Check

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1. Disconnect the clock spring wiring harness at the

lower steering column.

The shorting bar at the disconnected SDM
connector will create a complete circuit be-
tween the wires from the clock spring
connector.

2. Using a multimeter, check the voltage at one of

the terminals on the SDM side of the clock spring
connector.

Refer to ‘‘Diagnostic Illustration 7’’ in this
section.

Did the voltmeter indicate the specified value?

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0 v

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Go to Step 7

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Go to Step 2

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1. Replace the clock spring.
2. Reconnect the negative battery cable.
Is the repair complete?

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–

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Go to

Diagnostic

System Check

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–

8B – 22 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)

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

DTC 05

–

Passenger Firing Circuit, Resistance Too High

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Step

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Action

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Value(s)

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Yes

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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?

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Go to Step 2

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Go to Step 3

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1. Reconnect the passenger side airbag module

connector.

2. Reconnect the negative battery cable.
Is the repair complete?

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–

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Go to

Diagnostic

System Check

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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?

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≈

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Go to Step 4

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Go to Step 6

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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?

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Go to Step 5

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System OK

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

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–

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Go to

Diagnostic

System Check

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1. Replace the supplemental inflatable restraints

(SIR) wiring harness.

2. Reconnect the negative battery cable.
Is the repair complete?

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–

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Go to

Diagnostic

System Check

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–

8B – 24 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)

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.

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: 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.

Content .. 208 209 210 211 ..