Mazda 2009 CX-7 Manual page 264

Interior Comfort
Audio System
NOTE
Master code:
The Master Code is used to initialize or re-
initialize the ID code in the event that the code
is not set to [0000] and/or the personalized ID
code is not known. The initialization process
resets the ID code to [0000]. The master code
can potentially defeat the intent of the security
of the parental lock if it is located by persons
not authorized by the owner to access certain
channels.
SIRIUS Satellite Radio Master Code: [0913]
(How to clear the message)
Press any of the following FM/AM,
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SAT, CD, MEDIA, TEXT, CAT, ESN/
DISP, Instant replay, POWER buttons.
Turn the ACC off or insert a CD.
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NOTE
When a numeric value other than the
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master code is input and the auto memory
button is pressed, "SR1 Err" is displayed
and then it returns to the "SR1 - - - -"
display again.
If an ID code is not input for 10 seconds,
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"Err" is displayed and it returns to the
former display.
Channel preset buttons 1, 2, 3, 4 and the
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auto memory button are used for inputting
the ID code. Buttons 5 and 6 cannot be
used.
Change of ID code
Setting condition: SAT mode
(Registered ID code input)
1. Hold the auto memory button, then
press channel preset button 5, hold
both buttons together for 1.5 seconds.
2. ENTER PIN appears for 2 seconds
which indicates that it is in code input
mode.
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3. SR1 - - - - appears, which indicates
that it is ready for code input.
4. Input the registered ID code using
channel preset buttons 1-4. Then press
the auto memory button.
Example: When the registered ID code
is 2323 , input 2323 . At this time
SR1 2323 is displayed.
Press 1 for the first digit, 2 for the
second, 3 for the third, and 4 for the
last digit. For example, if your number
is 2323, press 1 three times, 2 four
times, 3 three, and 4 four times. If the
display goes off while inputting, begin
from Step 1.
NOTE
The registered ID code is the default [0000] at
the time of factory shipment. If [0000] results
in "Err" on the display, go to the
"INITIALIZATION OF ID CODE" section to
reset to [0000].
(Verification with the registered ID
code)
5. Determine the input code by pressing
the auto memory button briefly.
6. If it does not match with the previously
registered code, SR1 Err is displayed
and then it returns to SR1 - - - - .
7. If it matches with the previously
registered code, ENTER PIN appears
again and it switches to code input
mode.
8. SR1 - - - - appears, and it is ready for
input of the new ID code.