Enter the secret code as follows pausing no more than 15 seconds between steps:

1. LOC appears on the VF display with the ignition ON.
2. Press MN.

000 will appear on the display.

3. Press MN again until the last two digits agree with the last two digits of the secret code.
4. Press HR until the first one or two digits agree with the first one or two digits of the secret code.
5. Press AM/FM after confirming that the display code matches the secret code. SEC appears on the display indicating that the radio is now operable and secure.

INOP appears on the display if a wrong code is entered after eight attempts to enter the correct code. Wait one hour with the ignition ON before trying again. Only three attempts are allowed when retrying to enter the correct code before INOP appears.