Crankshaft Position Sensor: Description and Operation

PURPOSE
The Crankshaft Position Sensor reports Crankshaft Position to the Engine Control Module. By overlapping the signal from the Camshaft Position Sensor with that of the Crankshaft Position Sensor determining very accurate cylinder position is possible. This information is used by the Engine Control Module to help determine ignition timing / spark advance as well as injection timing.

OPERATION
The Crankshaft Position Sensor reads a protrusion on the timing rotor. As the protrusion passes under the sensor tip, the sensors magnetic field collapses and causes a voltage signal. The signal is read by the Engine Control Module.

NOTE: It is important to remember during any testing that the Crankshaft Position Sensor signal works in conjunction with the Camshaft Position Sensor. For more information, see CAMSHAFT POSITION SENSOR.
Camshaft Position Sensor