How to Activate ADB
There are two ways to activate ADB: via a USB flash drive or directly through the car head unit.
The easiest way, if you have a USB flash drive, is to:
1) Download the file from this link – Flag to activate ADB
2) Copy the file to a USB flash drive and insert it into the car’s USB port
3) Then press the USB2.0 engineering menu button. In the window that appears, on the left column, click the bottommost button named DEVICE.
4) After that, ADB mode should be activated. You can now remove the flash drive and connect a USB cable to your laptop.
If you don't have a USB flash drive, you can use one of the video instructions to activate ADB mode directly through the car head unit.
Watch the video: How to activate ADB on the car
Watch the video: How to access the J8 engineering menu
If the DEVICE button is missing in the engineering menu:
1) In the car settings, change the language to English
2) In the engineering menu, look for the ENCRYPTION section
3) In the window that appears, take the last 7 digits of the number shown, enter them into the form:
4) Below to get the password for the encrypted menu
5) Switch the ADB toggle to "Open" and proceed with the installation