Crankshaft Position Sensor

CRANKSHAFT POSITION SENSOR-PCM INPUT

This sensor is a hall effect device that detects notches in the flywheel (manual transmission) or flexplate (automatic transmission).

This sensor is used to indicate to the Powertrain Control Module (PCM) that a spark and or fuel injection event is to be required. The output from this sensor, in conjunction with the camshaft position sensor signal, is used to differentiate between fuel injection and spark events. It is also used to synchronize the fuel injectors with their respective cylinders.

Fig. 4 CKP Sensor:

The sensor is bolted to the cylinder block near the rear of the right cylinder head.

The engine will not operate if the PCM does not receive a crankshaft position sensor input.