Air Bag Indicator Circuit Malfunction (Passenger)

Air Bag Indicator Circuit Malfunction (Passenger)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions)provides an overview of each diagnostic category.

Diagnostic Fault Information





Circuit/System Description

The passenger air bag ON/OFF indicators are used to notify the driver when the passenger presence system has enabled or disabled the instrument panel inflator module. When the ignition is turned ON, the ignition voltage is supplied to the passenger presence system module. When the sensing and diagnostic module (SDM) receives the appropriate serial data message from the passenger presence system the SDM will then provide voltage to the appropriate indicator.

Reference Information
Schematic Reference

SIR Schematics ([1][2]Air Bag Systems)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

SIR System Description and Operation (SIR System Description and Operation)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing For Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

Control Module References (Programming and Relearning)for scan tool information

Circuit/System Verification

Note: The passenger air bag ON and OFF indicators may not operate as expected if there are supplemental inflatable restraint (SIR) DTCs. Repair all SIR DTCs before proceeding with this diagnostic.

1. Ignition ON, with the passenger seat unoccupied, verify the scan tool Passenger Seat Occupancy Status parameter is Empty.
2. With the passenger seat unoccupied, verify the passenger air bag OFF indicator is illuminated.
3. With the passenger seat occupied, verify the scan tool Passenger Seat Occupancy Status parameter is Occupied.
4. With the passenger seat occupied, verify the passenger air bag ON indicator is illuminated.

Circuit/System Testing

Note: removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected.

* Inflatable restraint passenger air bag on/off indicator.
* Inflatable restraint passenger air bag on/off indicator wiring harness.

1. Ignition OFF, disconnect the harness connector at the S48C instrument panel multi-function switch 1.
2. Test for less than 1 ohm between the ground circuit terminal 1 and ground.

• If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, with the passenger seat occupied, verify that a test lamp does not illuminate between the control circuit terminal 2 and ground.

• If the test lamp is illuminated, test the control circuit for a short to voltage. If the circuit tests normal, replace the K36 SDM

4. With the passenger seat unoccupied, verify that a test lamp illuminates between the control circuit terminal 2 and ground.

• If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal replace the K36 SDM.

5. With the passenger seat unoccupied verify that a test lamp does not illuminate between the control circuit terminal 3 and ground.

• If the test lamp is illuminated, test the control circuit for a short to voltage. If the circuit tests normal, replace the K36 SDM.

6. With the passenger seat occupied verify that a test lamp illuminates between the control circuit terminal 3 and ground.

• If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal replace the K36 SDM.

7. If all circuits test normal, replace the S48C instrument panel multi-function switch 1. Refer to Instrument Panel Multifunction Switch Replacement (Service and Repair).

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

Control Module References (Programming and Relearning)for SDM or instrument cluster replacement, setup, and programming