Engine Ignition

The Crankshaft Position (CKP) sensor:

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

^ is a variable reluctance sensor triggered by a 36-minus-1 tooth trigger pulse wheel located on the crankshaft 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
^ the crankshaft speed (rpm)