I own a 2008 scion tc, I also own a avic d1. I want to install the avic in the tc, I need to know the color code of the speed sensor wire behind the radio. I also have the pioneer factory upgraded stereo in the car with the factory subwoofer, will the factory sub wire up to my avic? has anyone adapted an avic to a 2008 tc with the factory sub? I also want to purchase an GEX-P10XMT xm tuner. my tc also has the ipod interface in the car center console, this interface charges the ipod and fully controls the ipod from the fatory head unit, will this interface work with my avic? or do i need to purchase the ip-bus interface seen on ebay? and when using the xm tuner with the avic, where do I connect the ipod adapter, to the avic or to the interface ip input? please help me if you can. thanks, Robert

you need the pioneer ipod unit

you plug the ipod into the xm and the xm into the d1

Speed Sense purple ECM, 2nd plug from top, pin 17

The ECM is behind the glove box.

The VSS wire is also yellow in the radio harness

not sure about the sub. it depends on the wiring harness for the car. havent seen an 08 yet

the orange wire is VSS and back up is purple behind the glove box

tha factory bazooka sub will plug right into the factory hanress then you plug the d3 harness into that