Crankshaft Position Sensor & Ignition Control Module
WARNING: This page is about a different car, the 2002 Mazda 626 and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
Crankshaft Position (CKP) sensor sends crankshaft position information to the Ignition Control Module (ICM), which sends an engine speed signal to the PCM. Signal received by the PCM affects line pressure, shift scheduling, torque converter clutch and Wide Open Throttle (WOT) shift control. Engine speed signal malfunction may result in harsh engagements, firm shifts, TCC lock-up and/or late WOT shifts.