I see. You don't use the diagnostic heads at all - just straight to the OBD2 port with USB to the laptop I assume.

So, the error that keeps coming back when you delete. That's the error causing the 4x4 (DSC/xdrive) error? Can you take a pic of the DIS screen where you can see the fault. Also, a pic of the short test result where it shows the symptoms.

I'll try and see what I can find in the control modules section even though mine is a different version of DIS.