Discovery I (LJ) V8-4.0L (1996)
Camshaft Position Sensor: Description and Operation
Camshaft position sensor (CMP Sensor)
The camshaft position sensor is located in the engine front cover. It produces one pulse every two revolutions. The signal is used in two areas, injector
timing corrections for fully sequential fuelling and active knock control.
If the camshaft sensor fails, default operation is to continue normal ignition timing. The fuel injectors will be actuated sequentially, timing the
injection with respect to top dead centre. Injection will either be correct or one revolution out of synchronization. The fault is not easily detected by
the driver. The fault is indicated by illumination of the malfunction indicator light (MIL) on North American specification vehicles.