Did you recently have a battery dissconnect, what is the situation to cause it not to work. when did it stop working and what were the conditions.
if this is a retro fit you have to have a high
The navigation system is designed to work with the High cluster only.If your has a Low cluster, he will not have full functionality.Viewing and setting Date/Time is one thing he cannot do.Other integrated functions will not work, because the nav is trying to talk to the High cluster, and the High cluster is not fitted.The only way to solve his problem is to retro-fit the High cluster