Hyundai Elantra HD: SRS Control Module (SRSCM). Description and Operation
Description
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.
