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:
Control Locations
* : If equipped ...
Online Reference Owner's Manual
This owner’s manual should be considered a permanent part of the
vehicle and should remain with the vehicle when it is sold.
This owner’s manual covers all models of your vehicle. You may find ...
Visiting Your Dealer
If you have a question that you cannot
resolve using the available help resources,
you can consult your dealer. Please identify
the specific issue (e.g., error occurs when
you enter a specific add ...