GM Service Manual Online
For 1990-2009 cars only

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.

These 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 passenger side air bag sensor is inoperative.

Step

Action

Yes

No

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

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

 

1

  1. Confirm the ignition switch is OFF and the sensing and diagnostic module (SDM) fuse has been removed.
  2. Wait for 1 minute for the SDM charger to be discharged.

Has the SDM discharged?

Go to Step 2

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2

Visually inspect any damage for the passenger side air bag sensor wiring.

Is the passenger side air bag sensor wiring damaged?

Go to Step 3

Go to Step 4

3

Replace the air bag wiring.

Is the replacement complete?

Go to Diagnostic System Check - SIR

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4

Replace the passenger side air bag sensor. Refer to Inflatable Restraint Side Impact Sensor Replacement .

Is the replacement complete?

Go to Diagnostic System Check - SIR

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