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:
Armrest
■Using the Driver’s Seat Armrest*
Pull down the armrest. ...
Switching to HFL Mode
1. If you receive a call when
Bluetooth® Audio is playing, press
the (Pick-Up) button on the
steering wheel to answer the call.
2. Press the (Hang-Up) button to
end the call, and Bluetooth® ...
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 ...