Integrated steering wheel radio controls

van-pioneer (Custom)

[Graham] bought a new stereo for his Peugeot 406. Unfortunately, the built in radio controls in his steering wheel didn’t interface directly with the head unit, but rather with the vehicle itself. His solution was to build a device to decode the button presses and send them to the head unit in the appropriate fashion. All source code and schematics are available on his site. He states that this should work on any PSA/Renault vehicle with a 125Kb VAN bus. We’re curious how similar some of the American systems are. We have seen something similar where someone wanted to control their Zune from the steering wheel.


  1. anon says:

    hey graham, i found your problem

    you bought a 406

    nice hack

  2. BMW-Ibus says:

    This reminds me of work done decoding the ibus control for BMW and a few other models.

    The Germans made the car able to interface with an amazingly large amount of the car. Unofficially of course.

  3. Pete says:

    I know someone who was has been doing this commercially for years, building little adaptor boxes between protocols used by manufacturer hifis and popular aftermarket systems.

  4. Jorge says:

    Great work!


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