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:
Other Features
This section describes the useful functions incorporated into the
navigation system. ...
Lights
Headlight Aiming
The headlights were properly aimed when your vehicle was new. If you regularly
carry heavy items in the cargo area, readjustment may be required. Adjustments should
be done by yo ...
EVAP Canister Replacement
Raise the vehicle on a lift.
Except LX (A/T model): Remove the fuel tank cover (A)
LX (A/T model): Remove the floor under cover assembly (A).
Remo ...