The passenger air bag ON/OFF indicators are used to notify the driver when the passenger presence system 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 and to the passenger presence system module. The sensing and diagnostic module (SDM) grounds all indicator control circuits to the passenger air bag ON/OFF indicators for illumination. The SDM receives serial data messages from the passenger presence 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

Note: 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 Presence Detection Occupancy Status with a scan tool. With the passenger seat unoccupied, the parameter should display Empty. The passenger air bag OFF indicator should illuminate.
3. Apply enough weight to change the parameter display to Occupied. The passenger air bag indicator should switch from OFF to ON within 5 seconds.

Note: 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 S26 inflatable restraint passenger air bag ON/OFF indicator.
2. Ignition ON, verify a test lamp illuminates between the voltage reference circuit terminal 8 and ground.

⇒	If the test lamp does not illuminate, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal test or replace the S26 inflatable restraint passenger air bag ON/OFF indicator.

3. Connect a test lamp between the ignition circuit terminal 8 and the control circuit terminal 2.
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 K36 SDM.

⇒	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 K36 SDM.

5. Connect a test lamp between the ignition circuit terminal 8 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 K36 SDM.

⇒	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 K36 SDM.

7. If all circuits test normal, replace the S26 inflatable restraint passenger air bag ON/OFF indicator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.