Sable V6-3.0L VIN U (1999)
Crankshaft Position Sensor: Description and Operation
Ignition, Electronic
The Crankshaft Position Sensor (CKP sensor) is a variable reluctance sensor triggered by a 36-minus-1 tooth trigger wheel located on the crankshaft
pulley and damper.
The signal generated from the crankshaft position sensor is called the Crankshaft Position (CKP) signal, which provides base timing and crankshaft
speed (rpm) information to the Powertrain Control Module (PCM). Base timing is set at 10 ± 2 degrees Before Top Dead Center (BTDC) and is not
adjustable.
The powertrain control module will use this information with the spark advance information to determine ignition coil turn on or turn off time.
