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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 passenger instrument panel air bag. When the ignition is turned ON, the ignition voltage is supplied to the passenger presence module. When the inflatable restraint sensing and diagnostic module (SDM) receives the appropriate serial data message from the passenger presence module the inflatable restraint sensing and diagnostic module 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 Fuel Pump and Level Sensor Assembly

Description and Operation

SIR System Description and Operation 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 Control Module References 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.

2. With a scan tool command the passenger air bag ON indicator and passenger air bag OFF indicator ON and OFF. The respective indicators should turn ON and OFF as commanded.

Circuit/System Testing

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

* Passenger air bag disable on/off indicator.

* Passenger air bag disable on/off indicator wiring harness.

1. Ignition OFF. Disconnect the harness connector at the A10 inside rearview mirror. It may take up to 2 minutes for all vehicle systems to power down. Ignition ON.

2. Test for greater than 11 V between the ignition circuit terminal 13 and ground

• If less than 11 V
Repair the open/high resistance in the circuit.

• If greater than 11 V

3. With a scan tool command the passenger air bag OFF indicator OFF.

4. Test for infinite resistance between the control circuit terminal 4 and ground.

• If less than infinite resistance

1. Ignition OFF. Disconnect the harness connector at the P16 instrument cluster.

2. Test for infinite resistance between the control circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance, replace the P16 instrument cluster.

• If infinite resistance

5. With a scan tool command the passenger air bag OFF indicator ON.

6. Test for greater than 11 V between the ignition circuit terminal 13 and the control circuit terminal 4.

• If less than 11 V

1. Ignition OFF. Disconnect the harness connector at the P16 instrument cluster.

2. Test for less than 1 V between the control circuit and ground.

• If greater than 1 V, repair the short to voltage on the circuit.

• If less than 1 V

3. Test for less than 2 ohms in the control circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, replace the P16 instrument cluster.

• If greater than 11 V

7. With a scan tool command the passenger air bag ON indicator OFF.

8. Test for infinite resistance between the control circuit terminal 3 and ground.

• If less than infinite resistance

1. Ignition OFF. Disconnect the harness connector at the P16 instrument cluster.

2. Test for infinite resistance between the control circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance, replace the P16 instrument cluster.

• If infinite resistance

9. With a scan tool command the passenger air bag ON indicator ON.

10. Test for greater than 11 V between the ignition circuit terminal 13 and the control circuit terminal 3.

• If less than 11 V

1. Ignition OFF. Disconnect the harness connector at the P16 instrument cluster.

2. Test for less than 1 V between the control circuit and ground.

• If greater than 1 V, repair the short to voltage on the circuit.

• If less than 1 V

3. Test for less than 2 ohms in the control circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, replace the P16 instrument cluster.

• If greater than 11 V

11. Replace the A10 inside rearview mirror.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Inside Rearview Mirror Replacement Inside Rearview Mirror Replacement

* Control Module References Control Module References for inflatable restraint sensing and diagnostic module replacement, programming and setup

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