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 (PPS) has enabled or disabled the passenger instrument panel air bag. When the ignition is turned ON, the ignition voltage is supplied to the passenger air bag ON/OFF indicators and to the passenger presence module. The instrument panel cluster (IPC) grounds all indicator control circuits to the passenger air bag ON/OFF indicators for illumination. The IPC receives serial data messages from the passenger presence module to illuminate the indicators as necessary.
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 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 DTC before proceeding with this diagnostic.
1. Ignition ON, the passenger air bag ON and OFF indicators should both illuminate for approximately 5 seconds for a bulb check.
2. Monitor the parameter Passenger Classification in Passenger Presence System with a scan tool. With the passenger seat unoccupied, the parameter should display Empty Seat. The passenger air bag OFF indicator should illuminate.
3. Apply enough weight on the passenger seat to change the parameter display to Occupied. The passenger air bag indicator should switch from OFF to ON within 5 seconds.
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 instrument panel air bag on/off indicator.
* Passenger instrument panel air bag on/off indicator wiring harness.
1. Ignition OFF, disconnect the harness connector at the passenger air bag ON/OFF indicator.
2. Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 4 and ground.
• If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test or replace the passenger air bag ON/OFF indicator.
3. Connect a test lamp between the ignition circuit terminal 4 and the control circuit terminal 3.
4. With the passenger seat unoccupied, then occupied the test lamp should switch states within 5 seconds.
• If the test lamp is always on, test the control circuit for a short to ground. If the circuit tests normal replace the IPC.
• If the test lamp is always off, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal replace the IPC.
5. Connect a test lamp between the ignition circuit terminal 4 and the control circuit terminal 1.
6. With the passenger seat unoccupied, then occupied the test lamp should switch states within 5 seconds.
• If the test lamp is always on, test the control circuit for a short to ground. If the circuit tests normal replace the IPC.
• If the test lamp is always off, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal replace the IPC.
7. If all circuits test normal, replace the passenger air bag ON/OFF indicator.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* SIR/SRS Wiring Repairs SIR/SRS Wiring Repairs
* Inflatable Restraint Instrument Panel Module Indicator Replacement Service and Repair
* Control Module References Control Module References instrument panel cluster (IPC) replacement, setup, and programming