Air Bag Control Module: Description and Operation

SRSCM (SUPPLEMENTAL RESTRAINTS SYSTEM CONTROL MODULE)

DESCRIPTION




The primary purpose of the advanced SRSCM (Supplemental Restraints System Control Module) is to discriminate between an event that warrants restraint system deployment and an event that does not The advanced SRSCM must decide if and when to deploy the restraint system pretensioners and airbags. After determining that pretensioners and/or airbag deployment is required, the advanced SRSCM must supply sufficient power to the pretensioners and airbag igniters to initiate deployment.The advanced SRSCM determines that an impact may require deployment of the pretensioners and airbags from data obtained from buckle switches, seat track position sensors, occupant classification system, front impact sensors and side impact sensors in conjunction with a sating function. The advanced SRSCM will not be ready to detect a crash or to activate the restraint system devices until the signals in the advanced SRSCM circuitry stabilize. It is possible that the advanced SRSCM could activate the safety restraint devices in approximately 2 seconds but is guaranteed to fully function after prove-out is completed. The advanced SRSCM must perform a diagnostic routine and light a system readiness indicator at key-on. The system must perform a continuous diagnostic routine and provide fault annunciation through a warning lamp indicator in the event of fault detection. A serial diagnostic communication interface will be used to facilitate servicing of the advanced restraint control system.