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:
Features
Audio System
For navigation system operation
See Navigation System Manual
...
Pressure Plate Inspection and Removal
Remove the transmission.
Check the evenness of the height of the diaphragm spring fingers using
the clutch alignment disc (A), clutch alignment shaft (B), remover handle
(C ...
Compatible iPod® and USB Flash Drives
iPod® Model Compatibility
This system may not work with all software versions
of these devices.
USB Flash Drives
• Use a recommended USB flash drive of 256 MB or higher.
• Some digital aud ...