The function of the camshaft sensor is a collection with the camshaft position signal ，enter the signal into the ECU so that the ECU could identity the cylinder 1 compression top dead center，to Proceed Sequential fuel injection control,ignition timing control and deflagration control.Besides,Camshaft position signal use to identify the first ignition timing for engine start.Because the camshaft position sensor can identify which cylinder position is about to reach the top dead center,so called cylinder identification sensor.http://www.hongsean.com/