The immobilizer system prevents a key that has not been pre-registered from starting the engine. Each key contains electronic transmitters that use electronic signals to verify the key.
Pay attention to the following when inserting the key into the ignition switch or pressing the ENGINE START/STOP button:
NOTICE
Leaving the key in the vehicle can result in theft or accidental movement of the vehicle.
Always take the key with you whenever you leave the vehicle unattended.
Do not alter the system or add other devices to it.
Doing so may damage the system and make your vehicle inoperable.
Canadian models only: Apply and hold the brake pedal before turning the vehicle on the first time after the battery has been disconnected.
Honda Civic Service Manual. Rear Speaker Removal, Installation, and Test (2-door)
013100 LEFT REAR
0131A8 RIGHT REAR
Removal
NOTE: SRS components are located in this area. Review the SRS component
locations and the precautions and procedures before doing repairs or service.
1.
Both Quarter Pillar Trims
...