Camshaft Position Sensor: Description and Operation

Camshaft Position (CMP) Sensor:

PURPOSE
The Camshaft Position (CMP) sensor provides camshaft position information for determining the position and stroke of No. 1 cylinder, which is required for fuel injection sequencing.

DESCRIPTION
The Hall Effect device signal supplied to the Powertrain Control Module (PCM), is used for synchronization of sequential fuel injector firing. The input circuit to the PCM is referred to as the Cylinder Identification (CID) input or circuit.

OPERATION
The CMP sensor is a single Hall effect magnetic switch, that is activated by a single vane driven by the camshaft.