NGBSDG BSD interface to alternator: Objective
WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
Precise calculation of alternator torque draw and control of the load-response function support a good engine idle Controlling alternator voltage based on setpoint data from the engine-management control unit allows the system to maintain a satisfactory charge balance for the battery.