Crankshaft Position Sensor

Fig 4 Crankshaft Position Sensor:

DESCRIPTION
This sensor is a hall effect device that detects notches in the engine crankshaft.

OPERATION
It 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.

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