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 and 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 PPS module is supplied with voltage and commands both the PASSENGER AIR BAG ON and OFF indicators to illuminate for 5 seconds. During this illumination interval, the PPS module conducts a series of self tests. If no malfunctions are detected, the PPS module illuminates the PASSENGER AIR BAG ON or OFF indicator, depending on the determination of passenger seat occupant status. If a malfunction is detected, the PPS module illuminates the PASSENGER AIR BAG OFF indicator and notifies the inflatable restraint sensing and diagnostic module (SDM). The SDM will illuminate the AIR BAG Indicator and Service Air Bag message to notify the driver of the PPS malfunction.
Reference Information
Schematic Reference
SIR Schematics ([1][2]Air Bag Systems)
Connector End View Reference
Component Connector End Views (Connector End Views By Name)
Description and Operation
SIR System Description and Operation (SIR System)
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
Important: 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.
When the passenger seat is occupied and then unoccupied, the inflatable restraint passenger air bag ON and OFF indicators should switch states within 5 seconds.
Circuit/System Testing
Important: When removing connectors inspect for damage or corrosion. Damage or corrosion to the following components requires repair or replacement of the affected component/connector:
* Inflatable restraint passenger instrument panel module indicator.
* Inflatable restraint passenger air bag ON/OFF indicator wiring harness.
1. Ignition OFF, disconnect the harness connector at the inflatable restraint instrument panel module indicator.
2. Test for less than 5.0 ohms between the ground circuit terminal 2 and ground
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that 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 circuit fuse is open, test all components connected to the ignition voltage circuit and replace as necessary.
4. With the right front passenger seat occupied, verify that a test lamp illuminates between the control circuit terminal 1 and B+.
• If the test lamp does not illuminate, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the PPS module.
5. With the right front passenger seat vacant, verify that a test lamp does not illuminate between the control circuit terminal 1 and B+.
• If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the PPS module.
6. With the right front passenger seat vacant, verify that a test lamp illuminates between the control circuit terminal 3 and B+.
• If the test lamp does not illuminate, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the PPS module.
7. With the right front passenger seat occupied, verify that a test lamp does not illuminate between the control circuit terminal 3 and B+.
• If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the PPS module.
8. If all circuits test normal, test or replace the inflatable restraint instrument panel module indicator.
Component Testing
1. Ignition OFF, disconnect the harness connector at the inflatable restraint instrument panel module indicator.
2. Install a 2A fused jumper wire between the ignition voltage circuit terminal 4 and B+. Momentarily install a jumper wire between the indictor control circuit terminal 1 and ground. Verify the ON indicator illuminates.
• If the ON indicator does not illuminate, replace the inflatable restraint instrument panel module indicator.
3. With the 2A fused jumper wire still connected, momentarily install a jumper wire between the indicator control circuit terminal 3 and ground. Verify the OFF indicator illuminates.
• If the OFF indicator does not illuminate, replace the inflatable restraint instrument panel module indicator.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Inflatable Restraint Instrument Panel Module Indicator Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for PPS module replacement, setup, and programming