i-350 L5-3.5L (2006)
Variable Valve Timing Actuator: Testing and Inspection
Camshaft Position (CMP) Actuator Diagnosis
For overall description of the camshaft position actuator refer to Exhaust Camshaft Position Actuator Description.
The camshaft position actuator will only phase 25-cam degrees retard (counterclockwise). Full advance (clockwise) is 0 degrees.
The camshaft position actuator should always be serviced/replaced in the full advanced position (full clockwise or 0 degrees). New replacement
(service) camshaft position actuators are shipped at full advance or 0 degrees. To be sure the camshaft position actuator is performing properly,
perform the following to help in the diagnostics.
The camshaft position actuator must be removed from the engine to perform the proper diagnostic test.
1. Clamp the camshaft actuator in a vice. Use care not to damage the contact area of the sprocket.
2. Scribe or draw a line (1) on the camshaft position actuator outer ring face, in the full advanced position. With the engine at TDC on #1 cylinder,
the wording should be level.
3. Apply compressed air pressure to the oil port (1) on the back side of the actuator to unlock the locking pin.
