Air Bag Warning Lamp

The AIR BAG warning lamp/indicator is in the Instrument Panel Cluster (IPC). The inflatable restraint Sensing And Diagnostic Module (SDM) communicates with the IPC using Class 2 serial data line. The SDM commands the IPC to turn the AIR BAG Warning Indicator ON and OFF through serial data communication. The SIR system uses the AIR BAG warning indicator to do the following:
^ Verify proper SIR system operation by commanding the lamp OFF via Class 2 serial data after seven flashes. The instrument cluster flashes the lamp seven times when the ignition switch is first turned ON.
^ When lit, alerts the driver of electrical system malfunctions that could affect the operation of the SIR system. Certain malfunctions can results in:
- Non-deployment in the case of a frontal crash.
- Non-deployment in the case of a side impact crash.
- Deployment for conditions less severe than intended.

The AIR BAG warning indicator is the key to driver notification of SIR system malfunctions.