Camshaft Position Sensor: Description and Operation

The Camshaft position sensor (G signal) consists of a signal plate and pick up coil.

The G signal plate has one tooth on its outer circumference and is mounted on the exhaust camshaft.

When the camshafts rotate, the protrusion on the signal plate and the air gap on the pick up coil change, causing fluctuations in the magnetic field and generating an electromotive force in the pick up coil.

The NE signal plate has 34 teeth and is mounted on the crankshaft. The NE signal sensor generates 34 signals for every engine revolution.

The ECM detects the standard crankshaft angle based on the G signals and the actual crankshaft angle and the engine speed by the NE signals.