I Posted a thread a few weeks back complaining that my steering controls did not work, the left hand side 2 buttons worked but did completely a different thing and the right hand side steering controls did not work at all.
Someone suggested it might be my headunit faulty or something, I got my old headunit back from my mate to give it a try and the steering contorls worked fine.

Took my headunit back to where i got it and was told that pioneer changed something so therefore the old steering stalk adapter no longer worked with new pioneer headunits, as the stalk adapter was in 3 parts, the loom, a black box and a 2.5mm socket, all I have had to do is order a 2.5mm socket which is actually for sony headunits and now it works fine

Just to let you guys know