Camshaft Position Sensor

The camshaft position sensor provides cylinder identification to the powertrain control module (PCM) and the ignition control module (ICM). See Fig 1 .

Fig 1: Identifying Camshaft Position Sensor

Courtesy of CHRYSLER CORP.

The sensor generates pulses. The PCM and ICM determine, crankshaft position from the camshaft position sensor and crankshaft position sensor inputs. The PCM uses the input to determine fuel injection synchronization. The ICM uses the input to determine which electric ignition coil to energize. The camshaft position sensor detects when a slot in the camshaft sprocket passes beneath it. See Fig 2 .

Fig 2: Identifying Camshaft Sprocket

Courtesy of CHRYSLER CORP.

When the sensor detects a slot, the input voltage from the sensor to the powertrain control module switches from low (0.3 volts) to high (5 volts). As the slot moves away from the sensor, the input voltage switches back to low (0.3 volts). The camshaft position sensor is mounted in the front of the timing case cover. See Fig 3 . The bottom of the sensor is positioned in front of the camshaft sprocket.

Fig 3: Locating Camshaft Position Sensor

Courtesy of CHRYSLER CORP.