Camshaft Position Sensor

Camshaft Position (CMP) sensor is located in timing cover or engine block. CMP sensor continuously sends PCM a signal that is used as a "sync pulse" to trigger injectors in proper sequence. CMP sensor signal indicates to PCM position during power stroke of cylinder No. 1. PCM is then able to calculate true sequential fuel injection operation. If signal is lost, PCM reverts back to calculated sequential mode based on the last fuel injection pulse received.