The primary purpose of
the SRSCM (Supplemental Restraints System Control Module) is to
discriminate between an event that warrants restraint system deployment
and an event that does not. The SRSCM must decide whether to deploy the
restraint system or not. After determining that pretensioners and/or
airbag deployment is required, the SRSCM must supply sufficient power to
the pretensioners and airbag igniters to initiate deployment. The SRSCM
determines that an impact may require deployment of the pretensioners and
airbags from data obtained from impact sensors and other components in
conjunction with a safing function.
The SRSCM will not be
ready to detect a crash or to activate the restraint system devices until
the signals in the SRSCM circuitry stabilize. It is possible that the
SRSCM could activate the safety restraint devices in approximately 2
seconds but is guaranteed to fully function after prove-out is completed.
The 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 restraint control
system.
