Celica GT-S L4-1.8L (2ZZ-GE) (2000)
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Camshaft Position Sensor: Description and Operation
The Camshaft Position Sensor
Camshaft position sensor (G22 signal) consist of signal plate and pick up coil.
The G22 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 G22 signals and the actual crankshaft angle and the engine speed by the NE signals.
