The anti-theft system on your Honda Accord helps to prevent unauthorized starting of the vehicle. But, if you need to change your battery, you will need to disable the alarm. If you forget to do this it will go off and you’ll need to reset the system. Once the alarm goes off, you need to know how to shut it off, and then how to reset the anti-theft system. All you need for this is your ignition key.
Insert the ignition key in the Accord’s driver-side door lock.
Turn the key to the unlock position.