Camshaft Position (CMP) Sensor

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 and which coil to fire on Distributorless Ignition Systems (DIS). 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.