The vehicle transmits radio waves to locate the smart entry remote when locking/ unlocking the doors and fuel fill door, opening the trunk, or starting the engine.
In the following cases, locking/unlocking the doors, opening the trunk, or starting the engine may be inhibited or operation may be unstable:
Low Smart Entry Remote Signal Strength*
Communication between the smart entry remote and the vehicle consumes the smart entry remote’s battery.
Battery life is about two years, but this varies depending on regularity of use.
The battery is consumed whenever the smart entry remote is receiving strong radio waves. Avoid placing it near electrical appliances such as televisions and personal computers.
Honda Civic Owners Manual. Immobilizer System
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 ST ...