Note. For circuit reference, see WIRING DIAGRAMS article.
Circuit Description
The Camshaft Position (CMP) sensor is located on rear of 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.