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:
Parking Brake Lever Replacement
Release the parking brake lever fully.
Remove the center console.
Disconnect the parking brake switch connector (A) from the parking brake
switch (B).
...
Navigation
This section describes how to enter a destination, select a route to take,
and follow the route to your destination. It also describes how to change
your route or destination along the way. ...
Intermediate Shaft Removal (A/T)
Drain the transmission fluid. Reinstall the drain plug with a new sealing
washer.
Remove the right driveshaft.
Remove the shift cable cover (A).
Re ...