Camshaft Position (CMP) Sensor

On Cherokee and Wrangler, CMP sensor is located inside distributor. See Fig 1 . On Grand Cherokee equipped with 4.0L engine, CMP sensor is located on top of oil pump drive shaft assembly. See Fig 2 . On 4.7L, CMP sensor is located on front corner of right cylinder head. This Hall Effect-type sensor works in conjunction with Crankshaft Position (CKP) sensor, providing PCM with inputs necessary to establish and maintain proper fuel injector firing order.

When leading edge of pulse ring enters sync signal generator on camshaft position sensor, resulting change in magnetic field causes a 5-volt reference signal to be induced. When trailing edge of pulse ring leaves sync signal generator on CMP sensor, resulting collapse of magnetic field causes reference signal to drop to zero volts.

Fig 1: Identifying Camshaft Position Sensor Components (Cherokee & Wrangler)

Courtesy of CHRYSLER CORP.

Fig 2: Identifying Camshaft Position Sensor Components (Grand Cherokee 4.0L)

Courtesy of CHRYSLER CORP.