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 turn-on test to diagnose critical malfunctions within SDM itself.

Upon passing 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 side air bag sensor wiring of the passenger high is shorted to ground.
    • The side air bag sensor wiring of the passenger low is shorted to ground.

Step

Action

Values

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.
  2. Wait for 1 minute for the SDM charger to be discharged.

Has the SDM discharged?

--

Go to Step 2

--

2

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

Are the passenger side air bag wiring and connector OK?

--

Go to Step 4

Go to Step 3

3

Measure the resistance between the high, low wiring of the passenger side air bag sensor and the ground.

Is the resistance equal to the specified value?

10 K ohms

Go to Step 5

Go to Step 4

4

Replace the air bag wiring.

Is the replacement complete?

--

Go to Diagnostic System Check - SIR

--

5

  1. Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement .
  2. Confirm the ignition switch is ON.
  3. Remove the DTC with the scan tool.
  4. Perform the Diagnostic System Check - SIR.

Is the DTC removed?

--

System OK

Go to Step 6

6

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

--