GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Aveo 🢒 Restraints 🢒 SIR 🢒 DTC 053

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.

The test ignition and deployment loop voltages are measured to ensure that they are within their normal voltage ranges. The SDM monitors the voltages at the driver low and the passenger low to detect shorts to ground or voltage in the deploy loops.

Conditions for Setting the DTC
    • The resistance of the driver air bag deployment loop is lower than 1.4 ohms.
    • The shorting bar is damaged and the SDM must be replaced.

Step

Action

Values

Yes

No

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 driver side airbag module.
  2. Disconnect the connector of the sensing and diagnostic module (SDM).
  3. Connect an ohmmeter to the terminals of the wiring harness connector for the driver side airbag module.

Does the ohmmeter show the specified value?

∞

Go to Step 3

Go to Step 5

3
  1. Replace the SDM.
  2. Reconnect the negative battery cable.
  3. Set the scan tool CODE ERASE.
  4. Perform the Diagnostic System Check - SIR

Is DTC 053 still shown as a current fault?

--

Go to Step 4

System OK

4
  1. Replace the driver side airbag module.
  2. Reconnect the negative battery cable.

Is the repair complete?

--

Go to Diagnostic System Check - SIR

--

5
  1. Replace the supplemental inflatable restraint (SIR) wiring harness.
  2. Reconnect the negative battery cable.

Is the repair complete?

--

Go to Diagnostic System Check - SIR

--