Checking The Camshaft Position

The control module checks that the 0 position of the camshaft (mechanical rest position) is correct. During certain driving conditions, camshaft control is not active. If this is the case, the control module checks the deviation between the camshaft position (angle position) and the crankshaft position (angle position).

The difference is stored in the engine control module (ECM) as an adaption value. A diagnostic trouble code (DTC) is stored in the engine control module (ECM) if the adaptation value becomes too high or low. The deviation of the camshafts from the reference position can be read off.