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:
About Your Audio System
On models with navigation system, see the Navigation System Manual for
operation
of the audio system, and Bluetooth®HandsFreeLink®.
The audio system features FM/AM radio. It can also play audi ...
Audio System Basic Operation
To use the audio system function, the ignition switch must be in ACCESSORY
or
ON .
Use the selector knob to access some audio
functions.
Selector knob: Rotate left or right to scroll
throug ...
USB Commands
USB play
USB play track # (#: 1 to 30)
USB skip forward
USB skip back
USB track random*
USB track repeat*
USB track scan*
USB folder up
USB folder down
USB folder random*
USB folder repeat*
...