I have an 18 iA, loaded Mazda tweaks on it 10 months ago no issues. I don't think that's the issue I think it's an electrical issue. But I have never had a problem with it. Until yesterday I get in and the unit doesn't power on. I have turned the car on and off numerous times, checked fuses, disconnected battery and not even a flicker, and yes I've also tried the 3 button reset but since it's not even turning on it doesn't work..... ANYBODY have idea's? I'm going to get a wiring diagram from Toyota today and try and see if it's getting power at all or not. If anyone has suggestions I'm all ears.