Pioneer4x4:
Did you connect the steering wheel controls to your radio? If so, which kit did you use? Is there a noticeable lag? What did you do with the preset and mode buttons?
What were the part numbers for the harness pieces you bought?
ot1:
Is there a standard (de facto/de jure) bus protocol for these things? Does someone have a PIC programmed to control them? Do any aftermarket head-units put this kind of information out?
If you don't have a scangauge type thing, then you lose the MPG etc information. You'd think that these days, the fancy head units would actually