The passenger air bag ON/OFF indicators are used to notify the driver when the passenger presence system (PPS) has enabled or disabled the I/P inflator module. When the ignition is turned ON, the ignition voltage is supplied to the passenger air bag ON/OFF indicators in the inside rearview mirror (ISRVM) and to the PPS 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 supplemental inflatable restraints system to illuminate the indicators as necessary.

Schematic Reference

SIR Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

SIR System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

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 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 Small. The passenger air bag OFF indicator should remain illuminated.
4. Apply additional weight to change the parameter display to Large. The passenger air bag indicator should switch from OFF to ON within 5 seconds.

Important: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected.

1. Ignition OFF, disconnect the harness connector at the ISRVM.
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, replace the ISRVM.

3. Connect a test lamp between the ignition circuit terminal 13 and the control circuit terminal 4.
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 13 and the control circuit terminal 3.
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 ISRVM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.