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.
