Description And Operation

WARNING: This page is about a different car, the 2022 Chrysler Voyager and 2022 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.

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NOTE:

Typical tone wheel (1) and Crankshaft Position (CKP) sensor (3) shown in illustration.

The Crankshaft Position (CKP) sensor (3) is mounted into the right rear side of the cylinder block. It is positioned and bolted into a machined hole.

Engine speed and crankshaft position are provided through the CKP sensor. The sensor generates pulses that are the input sent to the Powertrain Control Module (PCM). The PCM interprets the sensor input to determine the crankshaft position. The PCM then uses this position, along with other inputs, to determine injector sequence and ignition timing.

A tone wheel (target wheel) (1) is bolted to the engine crankshaft. This tone wheel has sets of notches (2) at its outer edge.

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The CKP sensor is a hall effect device combined with an internal magnet. It is also sensitive to steel within a certain distance from it.

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The notches (3) cause a pulse to be generated when they pass under the sensor. The pulses are the input to the PCM.

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Depiction of good camshaft and crankshaft square wave signals for 6 cylinder engines.