Camshaft Position Sensors

Located on the rear of the cylinder head, the camshaft position sensors (Hall effect) monitor the position of the camshafts to establish start of ignition firing order, setup sequential fuel injection triggering and for accurate camshaft advance and retard (double VANOS) timing feedback. With full variable VANOS control on both the intake and exhaust camshafts, four camshaft position sensors are required. The sensors are provided with operating power from the PCM main relay and produce a square wave input signal to the PCM. The trigger wheels contain a wide tooth that is used to establish full sequential injection.