Camshaft Position Sensor: Description and Operation

Crank Angle Sensor:

The crank angle sensor located in the distributor consists of the signal generator (pick-up coil and magnet) and signal rotor.

As the signal rotor turns, AC voltage is generated in the pick-up coil which varies in pulsatory way as shown. This pulse signal (12 pulses per revolution) is sent to ECM where it is used to calculate the engine speed and also as one of the signals to control various devices.