Signal range check of mass air flow signal
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 monitoring of the engine load sensor consists of a signal range check. It compares the sensor signal with an upper and lower threshold to detect short circuit.
If the measured value from the mass air flow sensor exceeds the upper calibration threshold; a short circuit to battery is detected and a maximum fault is set.
If the measured value from the mass air flow sensor exceeds the lower threshold; a short circuit to ground is detected and a minimum fault is set.