Originally Posted by Sigur

Yes. You have to add a pin to a blank spot in the pioneer harness and ground to bypass. I had already done this 5 years ago when I first put this head unit in my old Subaru. What I was saying is the scocshe harness does not have a wire at pin 18 for the speed signal. So you can remove a unused wire like a rear speaker wire and use them for speed or SW controls etc.