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:
Fuel and Emissions System Description - PGM-FI System
PGM-FI System
The programmed fuel injection (PGM-FI) system is a sequential multiport
fuel injection system.
Alternator Control
The alternator signals the ECM/PCM during chargi ...
General Commands
Display menu (if en route, displays the
Route screen)
Display navigation (if en route, displays
the Route screen)
Display map
Display map guide (when en route,
shows the next guidance point)
Di ...
Radio Theft Protection
Your vehicle’s audio system will disable itself if it is disconnected from electrical
power for any reason.
To make it work again, you must enter a specific five-digit code in the preset
button ...