Firebird V8-5.7L VIN G (2001)
Malfunction Lamp / Indicator: Testing and Inspection
AIR BAG INDICATOR CIRCUIT MALFUNTION
CIRCUIT DESCRIPTION
When the ignition is turned ON, the Instrument Panel Cluster (IPC) flashes the AIR BAG indicator seven times. The inflatable restraint Sensing And
Diagnostic Module (SDM) performs diagnostic tests on the SIR system and then commands the IPC to turn the AIR BAG indicator OFF if no SIR
malfunctions exist. The AIR BAG indicator is controlled by the SDM via Class 2 serial data. If the ignition 1 voltage is outside of the normal
operating voltage range (9-16 volts), the SDM will command the IPC to turn the AIR BAG indicator ON with no Diagnostic Trouble Codes (DTCs)
present.
DIAGNOSTIC AIDS
The IPC will turn the AIR BAG indicator ON if there is a loss of serial data communication between the IPC and the SDM. For more detailed
information concerning the Class 2 data lines, refer to Data Link Communications Description and Operation in Data Link Connector.
The following are possible causes of the malfunction:
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Ignition 1 voltage out of range.
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An internal IPC malfunction.
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An internal SDM malfunction.
TEST DESCRIPTION
Steps 1-7
