How can I unlock my audio system ?

I'"ve bough a used car (Honda Civic SI 2006)and my audio system is locked,I don't have the code.
audio system serial:40089283
audio system part#:4886727 (Clarion)

Hector
March 2010

your code is 5731
if you have locked 10 or 13 on screen try this below first.
Here are some solutions... :

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Try to keep pressed "1" and "6" or only "6" and you should have more chances
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"10 locked"
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1- Drivers door open.
2- ign, off.
3- radio off.
4- press and hold "6".
5- turn on radio.
6- hold "6" 30-40sec.
7- if nothing happens let it go.
8- try more times.
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"10 & 13 locked"
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1. Drivers door open - leave open.
2. Ign. ON. - Use RED key only.
3. Radio ON.
4. Press and hold presets 1, 3 and 6.
5. Ign. OFF then back ON within 1 second.
6. Release presets 1, 3 and 6.
7. Radio OFF.
8. Ign. OFF.
Repeat the above the same number of times that is
showing on the display when you started. i.e: 10 or 13.
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hay88
March 2010