If any electrical devices are not working, turn the ignition switch to LOCK 0*1 and check to see if any applicable fuse is blown.
Fuses
Engine Compartment Fuse BoxHonda Civic Owners Manual. Using the Smart Entry with Push Button Start System
When you carry the smart entry remote, you
can lock/unlock the doors, fuel fill door, and
open the trunk.
You can lock/unlock the doors and fuel fill
door within a radius of about 32 inches (80
cm) of the outside door handle. You can open
the trunk within about 32 inches (80 cm)
radius ...