Short to Ground
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2010 BMW M6, 2010 BMW M5, 2009 BMW M6, 2009 BMW M5, and 2008 BMW M6. However, it is still accessible from the selected car via links, so may be relevant.
The crankshaft signal is continuously electrically monitored even during engine stand still. An error will be detected when one or both of the differential crankshaft signals are short-circuit to ground.