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:
Warranty Coverages
U.S. Owners
Your new vehicle is covered by these warranties:
New Vehicle Limited -covers your new vehicle, except for the battery,
emissions control systems, and accessories against defects in mat ...
Map Legend
MAP MENU (on map)
►Map Legend
See an overview of the map lines, areas, routes, and navigation icons.
Select an item.
► The system displays the map
legend.
A visual guide helps you ...
Output Shaft (Countershaft) Speed Sensor Replacement (A/T)
Remove the air cleaner assembly.
Disconnect the output shaft (countershaft) speed sensor connector, and
remove the output shaft (countershaft) speed sensor (A).
...