If the keyless remote battery or the vehicle battery is dead, use the key instead of the keyless remote.

Fully insert the key and turn it.
Locking/Unlocking the Doors Using a Key
When you lock the driver’s door with a key, all the other doors lock at the same time. When unlocking, the driver’s door unlocks first. Turn the key a second time within a few seconds to unlock the remaining doors.
Models with driver information interface
You can customize the door unlock mode setting.
Customized Features
Using the Remote Transmitter
Locking a Door Without Using a KeyHonda Civic Owners Manual. Rear Defogger/Heated Door Mirror* Button
Press the rear defogger and heated door mirror button to defog the rear
window
and mirrors when the ignition switch is in ON
*1.
The rear defogger and heated door mirrors
automatically switch off after 10-30 minutes
depending on the outside temperature.
However, if the outside temperat ...