Related Tests and Procedures

PASSENGER PRESENCE SYSTEM INDICATOR CIRCUIT MALFUNCTION

CIRCUIT 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 commands both PASSENGER AIR BAG ON/OFF indicators ON for 5 seconds. The PPS module conducts tests on the PPS components and circuits while both PASSENGER AIR BAG ON/OFF indicators are ON. If no malfunctions are detected the PPS module will turn the PASSENGER AIR BAG indicator ON or OFF depending on the status of the PPS. If a malfunction is detected, the PPS module will store a DTC, default the PPS to the OFF state and communicate with the SDM that a DTC has been set. The SDM will request the instrument panel cluster (IPC) to turn the AIR BAG indicator ON to notify the driver of a PPS malfunction.

DIAGNOSTIC AIDS
The following can cause an intermittent condition:
- A short in the passenger air bag OFF indicator control circuit
- A short in the passenger air bag ON indicator control circuit
- An open or high resistance in the passenger air bag OFF indicator control circuit
- An open or high resistance in the passenger air bag ON indicator control circuit

TEST DESCRIPTION

Steps 1 - 10:

The numbers below refer to the step numbers on the diagnostic table.
4. This step tests the ignition 1 voltage circuit between the inside rearview mirror and the underhood fuse block for a short to ground, a high resistance, or an open.
5. This step tests the passenger air bag OFF indicator control circuit for a short to ground, a high resistance, or an open.
6. This step test the passenger air bag ON indicator control circuit for a short to ground, a high resistance, or an open.
7. This step tests the PPS module for proper operation.