Skylark L4-144 2.4L DOHC VIN T SFI (1997)
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Frontal Crash Detection-The SDM monitors vehicle velocity changes to detect frontal crashes that are severe enough to warrant deployment.
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Air Bag Deployment-During a frontal crash of sufficient force, the SDM will cause enough current to flow through the inflator modules to
deploy the air bags.
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Frontal Crash Recording-The SDM records information regarding the SIR system status during a frontal crash.
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Malfunction Detection-The SDM performs diagnostic monitoring of the SIR system electrical components. Upon detection of a circuit
malfunction, the SDM will set a diagnostic trouble code.
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Malfunction Diagnosis-The SDM displays SIR diagnostic trouble codes and system status information through the use of a scan tool.
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Driver Notification-The SDM warns the vehicle driver of SIR system malfunctions by controlling the AIR BAG warning lamp.
The SDM connects to the SIR wiring harness using a 12-way connector. The AIR BAG warning lamp will come ON steady with power applied to the
SDM when either one of the following two conditions exist:
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You remove the inflatable restraint Sensing and Diagnostic Module (SDM) CPA.
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You disconnect the SDM harness connector.
The SDM receives power whenever the ignition switch is at the RUN or START positions.
