will install the avic-z2, like to know where the vss and reserve wires are located, i will be pulling this avic from 2008 so i need the new harness, or the old one will work with 09 corolla s?

secondly how to hook up the steering controls to interface with this, thanks a lot for looking into it for me.

Speed Sense Color: VIOLET

Polarity: (AC)

Location: AT MAIN BODY ECU

Reverse Lights Color: RED

Polarity: (+)

Location: AT REVERSE LAMP

The reverse lights wire might also be found under the drivers sill, or in the driver's kick plate, since it has to run to the back of the car.

Thanks for answering the question... !

the main body ECU is located under the passanger side of the dashboard?

The Reverse Light, is it coming from the fuse box in the hood of the vehicle?

Thanks

I don't know exactly where they are in your vehicle, that's from the tech information at my job. And I told you where you may find the reverse lights.

No problem. Just be sure to use a Test light since there's guaranteed to be more than 1 red wire in that big harness going to the rear, and you dont want to splice into the wrong wire. ground the test light, and probe a red wire, then put the car in reverse (Of course not when the car is started and with the parking break engaged). if the test light lights up when you put it in reverse, that's your wire. If it doesn't, try another red one until you find it. Good luck!