Air Bag Control Module: Description and Operation

The diagnostic monitor contains a microcomputer that monitors the electrical system components and connections. The monitor performs a self-check of the microcomputer internal circuits and energizes the system readiness indicator during prove out and whenever a fault occurs. System electrical faults can be detected and translated into different coded indicator displays. If certain faults occur, the system will be disarmed by a firing disarm device built into the monitor. If a system fault exists and the indicator is malfunctioning, an audible tone will be heard signaling the need for service. On vehicles equipped with only a driver's side air bag, a jumper is installed near the passenger air bag connector to deactivate the passenger side diagnostic function.