I decided to build a MP3/CD changer emulator but I have a problem. I built a sniffer on the basis of the code for Toyota and work bu I cant enable AUX:? Then I checked the solution of this page for the Pioneer but it does not work too 
My Honda audio system operates on the basis of a protocol IEBus (GA-Netia, IP_Bus) NEC's. Oryginal CD changer is made by Pioneer. I know that some people connect the equipment  MP3 CD changer emulator (like Xcarlink) purchased for Car Honda Accord, Civic but do not have the full functionality of the device (disabled RND, RPT), therefore I decided to build yourself. Unfortunately, I do not have the original CD which would allow me to read command HU> CD and CD> HU 
I think that Toyota commands are different than Honda's and ofcourse ID HU and CD.
Can someone help me? I need a table of these commands and ID HU, CD to appear in the Honda?Accura
Pantomas

I'm looking for any information on this topic. In particular, schematics of , notes, source code, advice as well do it, etc.. 

Hi,
Help me please!
I'm looking for MultiCDemulator project using AT89C51SND1 and IP-bus/Pioneer.