Have your tried disconnecting the battery for about an hour and the start the process over, re-entering the radio security code then firing up the Navi and re-entering the NAVI security code?

 

I seem to remember something about it locking you out for an hour before it lets you try again, something like that. I'm pretty sure the radio and nav don't actually lock you out permanently, I wouldn't worry too much about that.

 

Thanks for the info theirishscion. Waited the hour and it came back. Fighting a dying battery and will probably go the Optima route like I did on the TSX. Just have to find the right sized one.