Sensor, Camshaft Position: Operation

The signal circuit of the Camshaft Position (CMP) sensor has a voltage of approximately 5 volts. If the segment machined into the exhaust camshaft sprocket is positioned opposite the CMP sensor, the camshaft signal is approximately 0 volts. This 0 volt to 5 volt signal is used by the Powertrain Control Module (PCM) for detecting ignition Top Dead Center (TDC) of cylinder 1 as the engine rotates. If no signal is supplied by the CMP sensor, the vehicle will not start.