Hmm. That might be because the 1 Series Harman Kardon system does not have an amp while the bigger models do. Unplugging the ASD module disables other systems in the vehicle, then.
There's an ASD bypass thingy from some company, whose name I have forgotten, but probably the simplest way to get rid of it is to code it.
Ugh, I am glad I don't have to deal with this.
