I tried my wife's new 2010 RDX Navi disk in my 2008 TL. It downloaded and worked great. I went back and installed my Old Disk, went thru the press and hold "GUIDE" "MENU" and "CANCEL" for 5 seconds and loaded the old disk back.

Now everytime I start the car it goes to some sort of Self Diagnostic Screen. If I press press and hold "GUIDE" "MENU" and "CANCEL" for 5 seconds it takes me to the OK button and then goes back to normal.

Why does it keep going back to a diagnostic window?