Honda Civic Owners Manual: Key Types and Functions

Locking and Unlocking the Doors

...

Keys

Use the key to start and stop the engine, to lock and unlock the doors and to open the trunk. You can also use the remote transmitter or smart entry system* to lock and unlock the doors and to ...

See also:

Honda Civic Owners Manual. Voice Recognition
To achieve optimum voice recognition when using the voice control system: Make sure the correct screen is displayed for the voice command that you are using. Close the windows and moonroof*. Adjust the dashboard and side vents so air does not blow onto the microphone on the ceiling ...