Crankshaft Position (CKP) Sensor & Ignition Control Module

(ICM)

The CKP sensor sends crankshaft position information to the ICM, which sends an engine speed signal to the PCM. Signal received by the PCM affects line pressure, shift scheduling and torque converter clutch control. Engine speed signal malfunction may result in harsh engagements, firm shifts, TCC lock-up and/or late WOT shifts.