Crankshaft Position Sensor: Description and Operation

Crankshaft Position Sensor:

CIRCUIT DESCRIPTION
The Crankshaft Position Sensor is mounted in the engine front cover assembly and works in conjunction with a 4X reluctor wheel on the front of the crankshaft. The Crankshaft Position (CKP) sensor has a B+ power supply, a ground and a signal circuit.

As the crankshaft rotates, the reluctor wheel teeth interrupt a magnetic field produced by a magnet within the sensor. The sensors internal circuitry detects this and produces a signal which is read by the PCM.

The PCM uses this signal to accurately measure crankshaft velocity which is a variable used to detect misfire. This sensor is not used for spark or fueling.