I believe what you are looking at is the battery set-up menu.
D1.63 sets the "dead voltage" and r 2.09 sets the "reset voltage" for the BDI. not familiar with the model numbers. try hitting the horn button several times, if there is an enter key on the display try hitting that a few times.

in addition, you may have a pinched horn wire in the joy-stick, as these codes dont generally show up, it is part of the set-up menu.