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 | -- |
1. No indicators will illuminate. 2. The OFF indicator will not illuminate. 3. The ON indicator will not illuminate. 4. The OFF indictor will illuminate any time the ignition is ON. 5. The ON indictor will illuminate any time the ignition is ON. * 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 (PPS) has enabled or disabled the instrument panel (I/P) inflator module. When the ignition is turned ON, the PPS module will illuminate 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 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 sensing and diagnostic module (SDM) that a DTC has been set. The SDM will request the instrument panel cluster (IPC) to illuminate the AIR BAG indicator to notify the driver of a malfunction.
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 Testing
Important: When removing connectors inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected:
• PPS module • PPS module wiring harness • IPC module • IPC module wiring harness • SDM • SDM wiring harness
- Ignition OFF, disconnect the harness connector at the inflatable restraint passenger air bag On/Off indicator.
- Ignition OFF, test for less then 1 ohm between the ground circuit terminal 2 and ground.
- Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 4 and ground.
- Connect a test lamp between the control circuit terminal 3 and the ignition circuit terminal 4. With the passenger seat unoccupied, then occupied the test lamp should switch states within 5 seconds.
- Connect a test lamp between the control circuit terminal 1 and the ignition circuit terminal 4. With the passenger seat unoccupied, then occupied the test lamp should switch states within 5 seconds.
- If all circuits test normal, replace the inflatable restraint passenger air bag on/off indicator.
| ⇒ | If greater then the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | 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, test or replace the 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 all circuits test 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 all circuits test normal replace the IPC. |
| ⇒ | If the test lamp is always on, test the control circuit for a short to ground. If all circuits test 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 all circuits test normal replace the IPC. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for IPC and SDM replacement, setup, and programming |
