Just installed my x940 and had a local shop program and install an Axxess ASWC. I was wondering what all commands are recognized by the Headunit. I had factory bluetooth in the car already and would like to utilize the buttons if i could.

depends on the remote control, or remote control unit, but the pioneer itself should be able to recognize these commands:

http://avic411.com/index.php?/topic/35218-resistance-values/&do=findComment&comment=255520

I have the ASWC hooked up with my x920BT in my Hummer H2 - it recognizes all the wheel commands including the OnStar button which now activates both OnStar and the voice command on the HU... I don't use that button. lol

I believe you can even manually override how the ASWC interprets the different buttons.