The one thing I feel can be checked is ground to the DLC. There are two of them, pins 4 and 5. Check for continuity to ground. See pic 1.
Next, what you need to do is scan the system using a can scanner. This will help identify where the break down in communication is located. The can bus (controller area network) is a system used on this vehicle, Basically, it is a network of micro controllers communicate with each other.
Here is a video that explains how this works and how to check it:
Let me know what you find.
Wednesday, May 20th, 2020 AT 7:22 PM