1. Turn the ignition switch to the "ON" position without starting the engine.
2. Press and hold the "CD" button on the radio until the display shows "CODE."
3. Enter the new four-digit code using the radio's preset buttons. Press the corresponding preset button for each digit of the code. For example, if the code is 1234, you would press the preset buttons "1," "2," "3," and "4" sequentially.
4. Press the "CD" button again.
5. The display should now show "CODE ACCEPTED."
6. Turn the ignition switch to the "OFF" position.
7. The new CD code is now programmed. You can now use the CD player normally.