Depending on the length of time the power was interrupted, your system may require GPS initialization.

If initialization is not necessary, the system proceeds directly to the Startup Confirmation screen.
If the system fails to locate a sufficient number of satellites to locate your position within 10 minutes, the following screen is displayed.

If you are experiencing GPS reception problems:
Transmission End Cover Air Check Valve Inspection and Replacement (A/T)
NOTE:
There are two types of the transmission end cover; the type A and the
type B; and both types are available.
The differences between the types A and B of the end covers are:
...
Taking a Detour
DEST button (when en route)
►Detour
Calculate a detour route manually. The system attempts to calculate a new
route by
avoiding the next 5 miles (while on a freeway) or 1 mile (while on a ...
A/C Refrigerant Oil Replacement (With A/C)
Special Tools Required
Oil Injector Tool Robinair ROB16256, commercially available
*This tool is available through the Honda Tool and Equipment Program; call
888-424-6857
Recommended PA ...