Exhaust Camshaft Position Sensor
The exhaust camshaft position Sensor senses the retraction of camshaft to identify a particular cylinder. The Sensor senses piston position of the each cylinder for precise combustion.
When the crankshaft position Sensor system becomes inoperative, the camshaft position Sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.
The cylinder identification is performed by the crankshaft position Sensor and the camshaft position Sensors (Bank 1 and Bank 2). For this reason, if one of the camshaft position Sensors has a malfunction, the other camshaft position Sensor can work with the crankshaft position Sensor.
The Sensor consists of a permanent magnet and Hall IC.
When engine is running, the high and low parts of the teeth cause the gap with the Sensor to change.
The changing gap causes the magnetic field near the Sensor to change.
Due to the changing magnetic field, the voltage from the Sensor changes.