Mazda MX-5 Miata 2004 Owner's Manual page 161

Interior Comfort
Audio System
Canceling code number
1. Begin with the audio unit off and the
ignition switch is in the ACC position.
2. Press the auto memory button (
and the channel preset button 6
simultaneously for about 2 seconds
until "CODE" is displayed.
3. Again press the auto memory button
( ) and the channel preset button
6 simultaneously while "CODE" is
displayed (within 10 seconds). The
display will exhibit bars.
4. While the bars are displayed, input the
current code number as described in
setting procedure Step 4. (2547, for
example).
6-40
5. While the code number is displayed,
press the auto memory button (
and the channel preset button 6
simultaneously for about 2 seconds and
) "CODE" appears.
6. After 5 seconds, "CODE" will
disappear. This indicates the code
number is canceled.
NOTE
If Err (error) appears on the display,
begin from Step 4.
)