B1650

B1650 SRSCM CRASH RECORDED

CIRCUIT DESCRIPTION

SRSCM MALFUNCTION
The SRSCM shall also cyclically monitor the following:
1. Functional readiness of the firing circuit activation transistor.
2. Aduquacy of deployment energy reserves.
3. Safing sensor integrity: detection of faulty closure.
4. Plausibility of accelerometer signal.
5. Operation of SRSCM components.

The timely completion of all tests is monitored by a separate hardware watchdog. During normal operation, the watchdog is triggered periodically by the SRSCM : If the SRSCM fails to trigger the watchdog, the watchdog will reset the SRSCM and activate the SRI (Service Reminder Indicator). The SRSCM must be replaced once the fault codes except B1657 mentioned above are confirmed. Be able to reuse SRSCM 5 times, when B1657 is only monitored.