Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Inside Rear View Mirror Ignition | 2, 4 | 2, 4 | -- | -- |
Passenger Air Bag On Indicator Control | 1 | 2 | 2 | -- |
Passenger Air Bag Off Indicator Control | 3 | 4 | 4 | -- |
1. Passenger Air Bag On Indicator Always ON 2. Passenger Air Bag On Indicator Always OFF 3. Passenger Air Bag Off Indicator Always ON 4. Passenger Air Bag Off Indicator Always OFF | ||||
Circuit/System Description
The PASSENGER AIR BAG ON/OFF indicators located on the rearview mirror are used to notify the driver when the passenger presence system (PPS) has enabled or disabled the instrument panel (I/P) inflator module. The PPS air bag indicators will also inform the driver of any PPS malfunctions. When the ignition is turned on, the PPS module is supplied with ignition 1 voltage and illuminates both passenger air bag ON/OFF indicators for 5 seconds. The PPS module conducts tests on the PPS components and circuits while both passenger air bag ON/OFF indicators are illuminated. If no malfunctions are detected the PPS module will illuminate the passenger air bag indicator ON or OFF depending on the status of the PPS.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
SIR System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
With the passenger seat occupied and unoccupied the inflatable restraint passenger air bag ON/OFF indicator should switch states within 5 seconds.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the inside rear view mirror.
- Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 4 and ground.
- With the right front passenger seat occupied, verify that a test lamp illuminates between the control circuit terminal 1 and B+.
- With the right front passenger seat vacant, verify that a test lamp does not illuminate between the control circuit terminal 1 and B+.
- With the right front passenger seat vacant, verify that a test lamp illuminates between the control circuit terminal 3 and B+.
- With the right front passenger seat occupied, verify that a test lamp does not illuminate between the control circuit terminal 3 and B+.
- If all circuits test normal, test or replace the inside rear view mirror.
| ⇒ | 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 fuse is open, replace the inside rear view mirror. |
| ⇒ | 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. |
| ⇒ | If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the PPS module. |
| ⇒ | 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. |
| ⇒ | If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the PPS module. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for PPS module replacement, setup, and programming |
