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:
Radiator Connecting Pipe Replacement
Drain the engine coolant.
Remove the thermostat housing.
Remove the connecting pipe (A).
Install the connecting pipe with a new O-ring (B).
...
CKP Sensor Replacement
Raise the vehicle on a lift.
NOTE: Make sure the vehicle is level, because engine oil will drip out
when you remove the sensor.
Loosen the bolt (A). Remove the bolt (B) and ...
Audio
The advanced audio system provides clear, well-defined sound and makes the
most of your music.
Enjoy listening to a variety of audio sources, such as:
AM/FM Radio
Compact Disc
iPod®
USB ...