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:
Instrument Panel
This chapter describes the buttons, indicators, and gauges that are used
while driving. ...
Intake Manifold Chamber Removal and Installation
Exploded View
Removal
Remove the under-cowl panel.
Remove the air cleaner.
Disconnect the engine wire harness connectors, and remove the wire
harness c ...
Changing Your Destination
There are several methods you can use to change the route destination. ...