GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2004 🢒 Aveo 🢒 DTC 🢒 DTC 038

Circuit Description

When the ignition switch is turned to ON, the sensing and diagnostic module (SDM) will perform a turn-on test to diagnose critical malfunctions within the SDM itself.

If the SDM has been used 5 times for 5 explosions of the belt pretensioners or side air bags, the SDM should also be replaced.

Conditions for Setting the DTC

The count of the belt pretensioner and side air bag explosion is over 5 in the SDM.

Step

Action

Yes

No

Caution: Refer to Sensing and Diagnostic Module Voltage after Ignition is Turned Off Caution in the Preface section.

Caution: Refer to Sensing and Diagnostic Module Handling Caution in the Preface section.

 

1

Perform the Diagnostic System Check - SIR.

Is the Diagnostic System Check - SIR complete?

Go to Step 2

Go to Diagnostic System Check - SIR

2
  1. Disconnect the negative battery cable.
  2. Wait 1 minute for the sensing and diagnostic module (SDM) capacitor to discharge.
  3. Visually inspect the supplemental inflatable restraint (SIR) wiring harness.

Is there any visible damage to the SIR harness?

Go to Step 4

Go to Step 3

3
  1. Disconnect the negative battery cable.
  2. Replace the SDM.

Is the repair complete?

Go to Diagnostic System Check - SIR

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4
  1. Replace the SIR wiring harness.
  2. Reconnect the negative battery cable.

Is the repair complete?

Go to Diagnostic System Check - SIR

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