The proxy alignment did the trick !
On top of that, a very nice side effect of the proxy alignment is that i now have the non-radionav instruments setup in the dashboard.
Before the proxy alignment, i couldn't set the car clock, or view the turbo pressure (because all of this would have been done/seen through the radionav which doesn't exist anymore)
I guess with the proxy alignment, the dashboard computer saw that the radionav doesn't exist anymore and resynced the menus and options. Which is a very nice surprise!
Thanks again for all the help!