Honda Civic Owners Manual: Key Types and Functions

Locking and Unlocking the Doors

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Keys

Use the key to start and stop the engine, to lock and unlock the doors and to open the trunk. You can also use the remote transmitter or smart entry system* to lock and unlock the doors and to ...

See also:

Honda Civic Owners Manual. Checking the Engine
If the engine does not start, check the starter. Checking the Engine If you must start the vehicle immediately, use an assisting vehicle to jump start it.   Starter condition Checklist Starter doesn't turn or turns over slowly. The batte ...