1. Turn the ignition key to the "ON" position, but do not start the car.
2. Press and hold the "1" and "6" buttons on the radio simultaneously.
3. While still holding the "1" and "6" buttons, press the power button to turn the radio on.
4. The radio will display a four-digit code that is your radio's serial number.
5. Use the radio buttons to enter the five-digit radio code that you received from your car dealership or Honda service center.
6. Press the "AM/FM" button to confirm your entry and save the radio code.
The radio should now be unlocked and you will be able to listen to your favorite radio stations.