Camshaft Position Sensor

Camshaft Position (CMP) sensor is a Hall-Effect type sensor. PCM determines cylinder No. 1 TDC based on pulse signals received from CMP sensor. CMP sensor input is used to determine injector triggering sequence. On vehicles with Distributorless Ignition Systems (DIS) CMP sensor input is also used to determine which ignition coil to fire. On engines with distributor, CMP sensor is located in distributor. On engines with DIS, CMP sensor is located at front or rear of engine by camshaft.