Ford Mustang 1989-1993 Repair Guide

Crankshaft Position (CKP) Sensor



The Crankshaft Position (CKP) sensor, located inside the front cover, is a variable reluctance sensor triggered by a trigger pulse wheel (36 minus 1 tooth). The sensor supplies a signal to the Engine Control Module (ECM) which is used to determine crankshaft position and crankshaft rpm.


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Fig. Fig. 1: Crankshaft position sensor schematic

Using DVOM on the AC scale and set to monitor less than 5V, measure voltage between the sensor Cylinder Identification (CID) terminal and ground. The sensor is okay if the voltage reading varies more than 0.1V AC with the engine running at varying RPM.