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Daewoo Matiz (2003 year). Manual - part 209

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 17

DTC 02 – Driver Firing Circuit, Resistance Too Low

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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. Remove the driver airbag module.
2. Store the driver airbag module with the decorative

side facing upward.

3. Connect an ohmmeter to the terminals of the

wiring harness connector for the driver airbag
module.

Refer to ‘‘Diagnostic Illustration 3’’ in this
section.

Does the ohmmeter show the specified value?

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∞

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Go to Step 2

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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 to CODE ERASE.
4. Do the diagnostic system check.
Does the code 02 still show as a current fault?

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–

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Go to Step 3

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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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–

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1. Disconnect the clock spring wiring harness

connector at the lower steering column.

2. Connect an ohmmeter to the terminals at the

SDM side of the clock spring connector.

Refer to ‘‘Diagnostic Illustration 4’’ in this
section.

Does the ohmmeter show the specified value?

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∞

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Go to Step 5

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Go to Step 6

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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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–

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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 – 18 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)

D1AB302B

DIAGNOSTIC TROUBLE CODE (DTC) 03

DRIVER FIRING CIRCUIT, SHORT TO GROUND

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 module firing circuit. The SDM allows a very
small amount of current to flow through the driver airbag
module firing circuit. The SDM monitors the voltage
during this check.

DTC 03 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 – 19

DTC 03 – Driver Firing Circuit, Short To Ground

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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) wiring harness for damage.
Is there any visible damage to the SIR harness?

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–

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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 the repair complete?

ÁÁÁÁÁ

–

ÁÁÁÁÁÁÁ

Go to

Diagnostic

System Check

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–

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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 an ohmmeter to check the continuity

between ground and one of the terminals on the
wiring harness connector for the driver airbag
module.

Refer to ‘‘Diagnostic Illustration 5’’ in this
section.

Is the resistance less than the specified value?

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∞

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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.

Refer to the “Diagnostic System Check” in this
section.

Does the code 03 still show as a current fault?

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–

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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?

ÁÁÁÁÁ

–

ÁÁÁÁÁÁÁ

Go to

Diagnostic

System Check

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–

ÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

1. Disconnect the clock spring wiring harness

connector 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.

2. Using an ohmmeter, check for continuity between

ground and one of the terminals on the SDM side
of the clock spring connector.

Is the resistance less than the specified value?

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∞

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Go to Step 2

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Go to Step 7

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

ÁÁÁÁÁ

–

ÁÁÁÁÁÁÁ

Go to

Diagnostic

System Check

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–

8B – 20 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)

D1AB302B

DIAGNOSTIC TROUBLE CODE (DTC) 04

DRIVER 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 driver
airbag module firing circuit. The SDM allows a very
small amount of current to flow through the circuit. The
SDM monitors voltage during this check.

DTC 04 Will Set When

The firing circuit is shorted to voltage.

Test Description

Content .. 207 208 209 210 ..