B1620

CIRCUIT DESCRIPTION

SRSCM MALFUNCTION

The SRSCM also cyclically monitors the following:
1. Functional readiness of the firing circuit activation transistors.
2. Adequacy 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 watch dog 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 above mentioned are confirmed.