Seville STS V8-46L VIN 9 (1998) Air Bag Systems Malfunction Lamp/Indicator TSB
Malfunction Lamp / Indicator: Description and Operation
The AIR BAG warning lamp is in the instrument cluster (IPC). The inflatable restraint sensing and diagnostic module (SDM) communicates with the
IPC 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 ON position.
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Verify that the SDM is communicating with the IPC 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/side air bag/pretensioner 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. See: Testing and Inspection/Initial Inspection and Diagnostic Overview/SIR Diagnostic System Check