the pins are kind of shitty on the auxiliary harness, they break off for no reason. in our Suzuka they seriously just broke off. check for loose wires floating around, or if the back edges of the pins are broken off.
didn't help matters that whoever the tech was that worked on our Suzuka previously had all those wires in the entirely wrong places. I spent 2 days looking at illegible schematics and trying to match up faded wires that weren't even the same color as the listing in the book, or running continuity checks to the bike harnesses to decipher what #$^&ing wire was what to get them hardwired to the edge connector.
oddly enough, for the 24 or so odd wires I did, I think I got them all right on the first try. lol
there's 3 major points for the link system. the box in the back (the one with the switch), that has connectors running to the link board (probably mounted in the middle of it somewhere), and from the link board to the aux harnesses on the System 11 boards.
try reseating everything on the first 2 parts, see if there's any change. you might get lucky.