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:
Inspection
Install the flange nut on the damper shaft end, and set the socket wrench
and T-handle on the nut.
Compress the damper assembly by hand, and check for smooth operation
through ...
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 ...
Drive Belt Auto-Tensioner Inspection
Turn the ignition switch to ON (II), and make sure to turn the A/C switch
OFF, then turn the ignition switch to LOCK (0).
Check the position of the auto-tensioner indicator (A). S ...