Failure Mode Effects Management

During some Distributorless Ignition System (DIS) faults, the Failure Mode Effects Management (FMEM) portion of the DIS module will maintain vehicle operation. If the ignition module does not receive the Spark Output (SPOUT) input signal, it will turn the coils ON and OFF using the Profile Ignition Pick-up (PIP) signal. In doing so, the timing and dwell are fixed at 10 degrees BTDC. If the module does not receive the Cylinder Identification (CID) input signal, random coil synchronization will be attempted. Several start attempts may be required before the engine will start.