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
The audio system features FM/AM radio. It can also play audio discs, WMA/M/
AAC tracks, iPods®, USB flash drives, and Bluetooth® devices.
The audio system is operable from the buttons and switch ...
Hands Free Link Control Unit Input Test/Replacement
With navigation
Remove the driver's dashboard undercover.
Disconnect the 32P connector (A) from the HandsFreeLink control unit (B).
Inspect the connector and so ...
Front Door Glass Outer Weatherstrip Replacement
NOTE:
Put on gloves to protect your hands.
Take care not to scratch the door and related parts.
Lower the glass fully.
Remove the door sash outer trim.
...