Explorer Sport Trac 2WD V6-4.0L (2009)
achieved. A difference between the desired and actual camshaft position represents a position error in the PCM VCT control loop. The PCM
disables the VCT and places the camshaft in a default position if a concern is detected. A related DTC is also set when the concern is detected.
5. When the VCT solenoid is energized, engine oil is allowed to flow to the VCT actuator assembly which advances or retards the camshaft timing.
One half of the VCT actuator is coupled to the camshaft and the other half is connected to the timing chain. Oil chambers between the two halves
couple the camshaft to the timing chain. When the flow of oil is shifted from one side of the chamber to the other, the differential change in oil
pressure forces the camshaft to rotate in either an advance or retard position depending on the oil flow.
VCT System
