Air Bag Control Module: Description and Operation
SRSCMThe primary purpose of the advanced restraint control module is to discriminate between an event that warrants restraint system deployment and an event that does not. The advanced restraint control module 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 restraint control module must supply sufficient power to the pretensioners and airbag igniters to initiate deployment. The advanced restraint control module 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 safing function.
The advanced restraint control module will not be ready to detect a crash or to activate the restraint system devices until the signals in the advanced restraint control module circuitry stabilize. It is possible that the advanced restraint control module could activate the safety restraint devices in approximately 2 seconds but is guaranteed to fully function after prove-out is completed.
The advanced restraint control module 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.