The purpose to use Godiag GT100 breakout box with Autel is that its indicators will flash if Autel has a good communication with the CAS4 ECU box.
Look at the following image:
-The left one is Godiag GT100 breakout box;
-The testing platform is the middle parts (red pcb with a switch, 2 black adapters, 1 key coil). It will be a new testing platform with a shell made by obdii365.com engineer.
– The right one is CAS4 ECU box.
Press the switch of testing platform, it will flash, when you put a working key into the coil, it will keep flashing.
The indicators on the Godiag GT100 breakout box will flash to indicator the CAS4 ECU is communicating fine with Autel.
Okay, next is to operate on Autel key programmer by following the on-screen instructions.
Video guide :how to use AUTEL MD808 PRO to read CAS4 ECU fault code with GODIAG GT100