Circuit Description

The Camshaft Position (CMP) sensor is located on rear of engine cylinder head and consists of a signal generator and signal rotor. As signal rotor turns, a magnetic flux is applied to Hall Effect element repeatedly. Hall element generates a voltage that is proportional to magnetic flux. This voltage signal is wave-shaped and sent to PCM. PCM uses this pulse/revolution signal to determine engine speed and position of each piston. PCM uses this signal to control ignition timing and fuel injectors.

DTC will set when engine is cranking or running and there is no signal from CMP sensor for 3 seconds with PCM receiving engine start signal.