Camshaft Position Sensor: Description and Operation

Camshaft Position (CMP) Sensor:

The camshaft position (CMP) sensor (2) is located in a distributor style housing at the rear of the bank 1 cylinder head. The PCM uses the CMP sensor input in order to control the fuel injectors and the ignition timing. The CMP sensor is adjustable.

Operation

Operation:

The CMP sensor (3) contains a signal generator hall switch (2). A signal rotor (2), with 11 notches, is located in the CMP sensor housing and is driven by the camshaft. The CMP sensor has a specified air gap between the sensor core end and the signal rotor. When the signal rotor in the housing turns, a magnetic flux from the magnet is applied to the hall element repeatedly. The hall element generates a voltage that is proportional to the magnetic flux. This voltage signal is wave-shaped and is modified into a digital pulse before being sent to the PCM. The PCM uses the pulse and/or revolution signal in determining the engine speed and the position of each cylinder.