Crankshaft Position Sensor (7X)

The 7X crankshaft position sensor provides a signal used by the ignition control module. During cranking, the ignition control module monitors the 7X crankshaft position sensor input for recognition of the sync signal. The sync signal is used to determine the correct cylinder pair to spark first. The ignition control module also uses the 7X crankshaft position sensor to generate 3X reference pulses which the PCM uses to calculate RPM and crankshaft position. For additional information refer to Hall Effect Sensor, Ignition / Description and Operation.