This program enables the HU (Head Unit) CD Changer / AUX audio input on Toyota HU with Tuner & CD only.
Pressing CD button while no CD in rom will toggle the CD Changer/AUX input mode.
Sources from http://www.compcar.ru/forum/showthread.php?t=4835, https://github.com/KostyaSha/arduino-iebus http://softservice.com.pl/corolla/avc/index.php
Modified for handling the Toyota Avanza, HU Fujitsu Ten 86180-BZ380
Tested on - with:
-Toyota Fujitsu Ten 86120, 86180-BZ380
-Arduino Nano ATmega328P @16 MHz, Based on Resistor driver
-Arduino IDE v1.8.5