Crankshaft Position (CKP) Sensor

Hall Effect type crankshaft position sensor is mounted on the left rear side of transaxle bellhousing. Sensor reads groups of 4 slots on the outer edge of flywheel/flexplate. There are 2 groups on 2.5L.

The signal generated provides engine speed and crankshaft position information to PCM. CKP sensor tells PCM that a spark or fuel injection event is to be required. Signals from CKP and camshaft position sensors are used by PCM to differentiate between fuel injection and spark events. CKP sensor signal is also used to synchronize fuel injectors with their respective cylinders.

When a flywheel/flexplate slot passes the crankshaft position sensor magnet, output voltage of the Hall Effect sensor goes high (5 volts). When the metal between the slots is aligned with sensor, output voltage goes low (.3 volt). This high/low voltage signal is sent to PCM each time one of the slots passes the crankshaft position sensor.