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:
HFT-Navigation Microphone Removal/Installation (With Navigation)
Remove the front individual map light lens (A) using a flat-tip
screwdriver.
@font-face{font-family:
"Honda_SymbolMarkeng ...
HFL Menus
The ignition switch must be in ACCESSORY
or ON
to use HFL.
To use HFL, you must first pair your Bluetooth-compatible cell phone to the
system while the vehicle is parked.
Phone Setup
...
ATF Filter Replacement (A/T)
Remove the air cleaner assembly.
Disconnect the ATF cooler hoses (A) from the ATF filter (B).
Remove the ATF filter holder (C).
Remove the ATF filter, and ...