Operation CHARM: Car repair manuals for everyone.
Home >> GMC Truck >> 2013 >> Terrain FWD V6-3.6L >> Repair and Diagnosis >> Restraints and Safety Systems >> Air Bag Systems >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Air Bag Indicator Circuit Malfunction (Passenger)

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 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 Sunshade - Left Front

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 P14 Passenger Air Bag Disable Indicator.

2. Test for less than 10 ohms between the ground circuit terminal 2 and ground.

• If 10 ohms or greater
Repair the open/high resistance in the circuit.

• If less than 10 ohms

3. Ignition ON. With a scan tool, command the passenger air bag OFF indictor OFF.

4. Test for less than 1 V between the control circuit terminal 3 and ground.

• If 1 V or greater

1. Ignition OFF. Disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module, ignition ON.

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

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

• If less than 1 V, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

• If less than 1 V

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

6. Test for greater than 4 V between the control circuit terminal 3 and ground.

• If 4 V or less

1. Disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.

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

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

3. Test for less than 2 ohms in each 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 K36 Inflatable Restraint Sensing and Diagnostic Module.

• If greater than 4 V

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

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

• If 1 V or greater

1. Ignition OFF. Disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Ignition ON.

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

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

• If less than 1 V, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

• If less than 1 V

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

10. Test for greater than 4 V between the control circuit terminal 1 and ground.

• If 4 V or less

1. Disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.

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

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

3. Test for less than 2 ohms in each 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 K36 Inflatable Restraint Sensing and Diagnostic Module.

• If greater than 4 V

11. Replace the P14 Passenger Air Bag Disable Indicator.

Repair Instructions

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

* Inflatable Restraint Instrument Panel Module Indicator Replacement Service and Repair

* Control Module References Control Module References for Inflatable Restraint Sensing and Diagnostic Module replacement, programming and setup

pro multis · About Operation CHARM