Circuit Description

The DTC P1346 Intake Camshaft Position (CMP) System Performance monitors the operation of the Camshaft Position (CMP) actuator system. CMP actuator system enables Powertrain Control Module (PCM) to change intake camshaft timing while the engine is running. CMP actuator solenoid controls the advance or retard of the camshaft. CMP actuator solenoid is controlled by a Pulse Width Modulated (PWM) signal from the PCM. CMP sensor monitors camshaft position or camshaft angle, and compares that position or phase to Crankshaft Position (CKP) sensor signal. PCM determines whether the camshaft angle is correct by comparing actual camshaft position to target camshaft position. By continuously analyzing input of CMP and CKP sensors, PCM can detect a failure in the CMP actuator system.