Camshaft Position Sensor: Description and Operation

Typical Hall-Effect Sensor:

PURPOSE
The Camshaft Position (CMP) sensor detects the position of the camshaft when piston number one is at a specific top dead center point of its compression stroke.

OPERATION
The Hall Effect device signal supplied to the Powertrain Control Module (PCM), is used for synchronization of sequential fuel injector firing.

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