Hi St Thicket, I hope you are still there and can see this message. I have a pre-facelift Toyota Corolla 1.6 VVT-i from 2002 that lost its steering wheel controls due to a radio upgrade. I would require your PCB replacement approach to get them active again on my new system. Do you still have those PCB-s to offer so I can reactivate my steering wheel controls again? By the way, your info was the most instructive of all that I have found online. Great job!