Diagnosis of camshaft crankshaft synchronization
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 BMW Z4, 2008 BMW X5, 2008 BMW X3, 2008 BMW 528xi, and 2008 BMW 528i. However, it is still accessible from the selected car via links, so may be relevant.
The monitor eliminates with every event the edges from the list of all 6 cam edges, which are not insides the pattern. If a calibrated number of camshaft signal edges were detected and the list of remaining signal edges contains at least one edge, the camshaft signal is valid for synchronization. If no edge is left in the list, synchronization failed and is started again. If a calibrated number of synchronizations failed, the error is delivered to the error management. Afterwards, and only if synchronization fails with the intake camshaft, the same procedure is started with the exhaust camshaft.
Flowchart Diagnosis of camshaft crankshaft synchronization.