Hey, sorry for the late reply. Basically, the way Sync communicates to the other modules of the car (abs, ipc, apim, etc.) is through a CAN bus or controller area network. In the 2011-2013 Fiestas, communication to Sync used HS-CAN and MS-CAN. Sync 2 and 3 in 2014-2019 cars used HS-CAN but also used another network called I-CAN or MM-CAN that out cars simply lack. I've been working on an Arduino Emulator (really continuing on the work of others 🙏) which I have working in my car for the most part except for screen brightness, e911 (currently disabled, will likely never work) and the proper turn off command (right now it gets turned off like a hard reset everytime where the
Sync unit typically always has power). Even steering wheel controls are working for me.
Sync unit typically always has power). Even steering wheel controls are working for me.