Opening the trunk
Open the trunk all the way.
Closing the trunk
Keep the trunk lid closed while driving to:
Exhaust Gas Hazard
Using the Trunk Opener
Pressing the trunk opener on the driver’s door unlocks and opens the trunk.
When You Cannot Open the Trunk
Honda Civic Service Manual. Keyless Buzzer Removal and Installation (With Keyless Access System)
1.
Rear Bumper
1.
Remove the screws (A), the bolts (B), and the clips (C, D) securing
the rear bumper (E).
2.
...