Crankshaft Position Sensor: Description and Operation

LOCATION

Mounted in transmission housing, below the throttle body.

PURPOSE

Powertrain Control Module (PCM) uses input to determine basic timing and injector sequence.

OPERATION

Timing Slots:

Sensor reads a series of slots cut in transmission driveplate.

NOTE: It may take one complete engine revolution for PCM to determine crankshaft position.

NOTE: Base ignition timing is not adjustable.

NOTE: The distance between the sensor and torque converter drive plate is critical to system operation. Be sure paper spacer is attached to sensor face when installing sensor. SEE COMPONENT REPLACEMENT AND REPAIR PROCEDURES.