GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2004 🢒 Spark 🢒 Restraints 🢒 SIR 🢒 DTC 002

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 air bag module firing circuit. The SDM allows a very small amount of current to flow through the air bag module firing circuit. The SDM monitors the circuit resistance during this check.

Conditions for Setting the DTC

The combined resistance of the driver air bag module, the harness wiring, and the connector contacts is below a specified value, as with a short circuit between the wires to the driver air bag module.

Step

Action

Values

Yes

No

Caution: Refer to Battery Disconnect Caution in the Preface section.

Caution: Refer to SIR Special Tool Caution in the Preface section.

 

1
  1. Remove the driver air bag module.
  2. Store the driver air bag module with the panel side facing upward.
  3. Connect an ohmmeter to the terminals of the wiring harness connector for the driver air bag module. Refer to Diagnostic Illustration 3 in SIR Diagnostic Illustrations .

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. Perform the diagnostic system check.

Does DTC 002 still show as a current fault?

--

Go to Step 3

System OK

3
  1. Replace the driver air bag module.
  2. Reconnect the negative battery cable.

Is the repair complete?

--

Go to Diagnostic System Check - SIR

--

4
  1. Disconnect the coil spring wiring harness connector at the lower steering column.
  2. Connect an ohmmeter to the terminals at the SDM side of the coil spring connector. Refer to Diagnostic Illustration 4 in SIR Diagnostic Illustrations .

Does the ohmmeter show the specified value?

∞

Go to Step 5

Go to Step 6

5
  1. Replace the coil spring.
  2. Reconnect the negative battery cable.

Is the repair complete?

--

Go to Diagnostic System Check - SIR

--

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 - SIR

--