First I will say that all worked fine but the other day I started the car and have lost NAV audio, CDC operability, ACM operability, and though the phone connects to BT but when I try to switch to the phone it says "phone not fitted." I think it all must be related but to what I don't know.

I have reloaded NAV software with no change.


blue 2006 xj8. "They finally got it right"

 

unhook your battery and "reset" all systems.. I would also check your battery it may be getting time for a new one..

 

I think it is related to the ACM. I have the same problem from time to time ever since I had one installed by the dealer a few years ago. Others here have mentioned the same thing. Sometimes turning the car off and on fixes it and sometimes I just pull the fuse for the head unit to reset it.

 

That did it. Thank You. I hope I don't have to do this system reboot too often.