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:
Warm Up TWC Removal/Installation
NOTE: If the warm up TWC is damaged internally, inspect the under-floor TWC
for debris.
Raise the vehicle on a lift.
Remove the bolts (A).
Lower the vehicle.
...
General Commands
Display menu (if en route, displays the
Route screen)
Display navigation (if en route, displays
the Route screen)
Display map
Display map guide (when en route,
shows the next guidance point)
Di ...
Transmission Mount Replacement
Do the battery removal procedure.
Remove the air cleaner.
M/T model: Remove the battery cables (A) from the battery terminal fuse
box.
M/T mode ...