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, located in the center of instrument cluster, are used to notify the driver when the passenger presence module has enabled or disabled the passenger instrument panel air bag. When the ignition is turned ON, the passenger presence module is supplied with voltage and illuminates the PASSENGER AIR BAG ON/OFF indicators for 5 seconds. The passenger presence module conducts tests on the passenger presence module components and circuits while the PASSENGER AIR BAG ON/OFF indicators are illuminated. If no malfunctions are detected, the passenger presence module will illuminate the PASSENGER AIR BAG indicator ON or OFF, depending on the status of the passenger presence module. If a malfunction is detected, the passenger presence module will store a diagnostic trouble code (DTC), default the passenger presence module to the OFF state, and communicate with the inflatable restraint sensing and diagnostic module that a DTC has been set. The Inflatable restraint sensing and diagnostic module will request the instrument cluster to illuminate the AIR BAG indicator to notify the driver of a passenger presence module malfunction.
Reference Information
Schematic Reference
SIR Schematics [1][2]Air Bag Systems
Connector End View Reference
Component Connector End Views 5 Bow Lowered Switch (CM7)
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
With the passenger seat occupied and unoccupied the inside rearview mirror air bag on/off indicator should switch states 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.
* 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 inside rearview mirror
2. Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 13 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 inside rearview mirror.
3. Connect a test lamp between the control circuit terminal 3 and the ignition circuit terminal 13.
4. With the passenger seat occupied and unoccupied 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 all circuits test normal replace the passenger presence module.
• If the test lamp is always off, test the control circuit for a short to voltage or an open/high resistance. If all circuits test normal replace the passenger presence module.
5. Connect a test lamp between the control circuit terminal 4 and the ignition circuit terminal 13.
6. With the passenger seat occupied and unoccupied 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 all circuits test normal replace the passenger presence module.
• If the test lamp is always off, test the control circuit for a short to voltage or an open/high resistance. If all circuits test normal replace the passenger presence module.
7. If all circuits test normal, replace the inside rearview mirror.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Inside Rearview Mirror Lamp Replacement Service and Repair
* Control Module References Control Module References for passenger presence system replacement, setup, and programming