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 | High Resistance |
Open | Short to Voltage |
|---|---|---|---|---|
Voltage Reference | 1 | 1* | 1 | -- |
Passenger Air Bag OFF Indicator Control | 4 | 2* | 2 | -- |
Passenger Air Bag ON Indicator Control | 5 | 3* | 3 | -- |
* High resistance may cause any or all indicators to illuminate less bright than normal. | ||||
Circuit/System Description
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. The sensing and diagnostic module (SDM) controls all of the indicator control circuits to the passenger air bag ON/OFF indicators. When the passenger presence system enables or disables the I/P inflator module it communicates with the SDM through serial data requesting illumination of the indicators.
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
- Ignition ON, the passenger air bag ON and OFF indicators should both illuminate for approximately 5 seconds for a bulb check.
- 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.
- 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: 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.
Circuit/System Testing
Note: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected.
• Inflatable restraint passenger air bag on/off indicator. • Inflatable restraint passenger air bag on/off indicator wiring harness.
- Ignition OFF, disconnect the harness connector at the P14 inflatable restraint passenger I/P module indicator.
- Connect a test lamp between a ground and the control circuit terminal 2.
- With the passenger seat unoccupied, then occupied the test lamp should switch states within 5 seconds.
- Connect a test lamp between a ground and the control circuit terminal 5.
- With the passenger seat unoccupied, then occupied the test lamp should switch states within 5 seconds.
- If all circuits test normal, replace the P14 inflatable restraint passenger air bag ON/OFF indicator.
| ⇒ | 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. |
| ⇒ | 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. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References SDM replacement, setup, and programming |
