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:
Immobilizer-Keyless Control Unit Replacement
NOTE: SRS components are located in the area. Review the
SRS component locations, and
precautions and procedures before doing repairs or
servicing.
Remove the steering column ...
Safety When Performing Maintenance
Some of the most important safety precautions are given here.
However, we cannot warn you of every conceivable hazard that can arise in
performing maintenance. Only you can decide whether or not y ...
Modifications
Do not modify your vehicle or use non-Honda components that can affect its
handling, stability, and reliability.
Overall vehicle performance can be affected. Always make sure all equipment is
pro ...