Circuit Description

The camshaft position (CMP) sensor is a 1X sensor. It provides one digital ON/OFF signal, to the powertrain control module (PCM), per revolution of the camshaft. This information is used by the PCM to determine the position of the valve train relative to the crankshaft position (CKP). By monitoring the CMP and the CKP signals, the PCM can accurately time the operation of the fuel injectors. The PCM supplies 12 volts to the sensor on the 12-volt reference circuit and provides a ground on the low reference circuit. The CMP sensor provides signals to the PCM on the CMP sensor signal circuit. The PCM monitors the CMP sensor for errors. If the PCM does not receive a signal from the CMP sensor, DTC P0340 sets.