GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Spark 🢒 Restraints 🢒 SIR 🢒 DTC 007

Circuit Description

When the ignition switch is turned ON, the sensing and diagnostic module (SDM) will diagnose any malfunctions within itself.

After passing these tests, the SDM will check the passenger air bag firing circuit. The SDM allows a very small amount of current to flow through the circuit. The SDM monitors the voltage during this check.

Conditions for Setting the DTC

The firing circuit is shorted to ground.

Step

Action

Values

Yes

No

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

 

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 - SIR

--

3
  1. Disconnect the electrical connector from the passenger air bag module.
  2. Disconnect the electrical connector at the SDM.

    3. The shorting bar at the disconnected SDM connector will create a complete circuit between 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 air bag module. Refer to Diagnostic Illustration 9 in SIR Diagnostic Illustrations .

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. Perform the diagnostic system check.

Does DTC 007 still show as a current fault?

--

Go to Step 5

System OK

5
  1. Replace the passenger side air bag module.
  2. Reconnect the negative battery cable.

Is the repair complete?

--

Go to Diagnostic System Check - SIR

--