Crankshaft Position Sensor: Description and Operation

NOTE: Initial engine ignition timing is set at 10 degrees ± 2 degrees Before Top Dead Center (BTDC) and is not adjustable.

The Crankshaft Position sensor (CKP sensor) is a variable reluctance sensor triggered by a 36-minus-1 tooth trigger pulse wheel located inside the engine front cover.

The sine wave type signal generated from the crankshaft position sensor provides two types of information:
- position of the crankshaft in 10-degree increments.
- crankshaft speed (rpm).
- The Powertrain Control Module (PCM) uses this information to determine ignition coil turn ON and turn OFF time and for misfire detection.