Impala V6-3.8L SC VIN 1 (2005)
Malfunction Lamp / Indicator: Description and Operation
AIR BAG INDICATOR
The AIR BAG indicator, located in the instrument panel cluster (IPC) is used to notify the driver of SIR system malfunctions and to verify that the
sensing and diagnostic module (SDM) is communicating with the IPC. When the ignition is turned ON, the IPC responds by flashing the AIR BAG
indicator seven times. While the IPC is flashing the AIR BAG indicator, the SDM conducts tests on all SIR system components and circuits. If no
malfunctions are detected, the SDM will command the IPC to turn the AIR BAG indicator OFF via Class 2 serial data. The SDM provides continuous
monitoring of the inflator module circuits by conducting a sequence of checks. If a malfunction is detected, the SDM will store a diagnostic trouble code
(DTC) and command the IPC to turn the AIR BAG indicator ON via Class 2 serial data. The presence of a SIR system malfunction could result in
non-deployment of the inflator modules. The AIR BAG indicator will remain ON until the malfunction has been repaired.
