DeVille V8-4.6L VIN Y (1998)
Malfunction Lamp / Indicator: Description and Operation
The AIR BAG warning lamp is in the Instrument Panel Cluster (IPC). The inflatable restraint Sensing and Diagnostic Module (SDM) communicates
with the PC using serial data communication. The SDM commands the IPC to turn the warning ON and OFF through serial data communication. The
SIR system uses the AIR BAG warning lamp to do the following:
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Verify the lamp operation by flashing the lamp seven times when the ignition switch is first turned to the RUN position.
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Verify that the SDM is communicating with the PC through serial data communication and that no SIR Diagnostic Trouble Codes (DTCs) are
present by turning the lamp OFF after flashing seven times.
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Warn the vehicle driver of SIR electrical system malfunctions which could potentially affect the operation of the SIR system. These
malfunctions could result in one or more of the following conditions:
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Non-deployment in the case of a frontal crash
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Non-deployment in the case of a side impact crash
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Deployment for conditions less severe than intended
The AIR BAG warning lamp is the key to driver notification of SIR system malfunctions. Refer to SIR Diagnostic System Check for proper lamp
operation.
