If a problem occurs in the airbag system, the SRS indicator will come on and a message appears on the driver information interface*.
Honda Civic Service Manual. High Mount Brake Light Removal and Installation - With Trunk Lid Spoiler
('13-'14: 4-door)
1.
High Mount Brake Light
maunlled
1.
Remove the high mount brake light (A) from the trunk
lid spoiler.
...