I need you to start by checking fuse 5 in the under hood fuse/relay box. If you look at pic 1 below, I highlighted the fuse I'm referring to.
In addition to checking the fuse, confirm there is power to and from it. This fuse powers the data link connector along with several other components. We need to get the DLC working so you can scan the computer. Keep in mind, if the fuse is blown, it could be the cause of the problem. If you look at pic 2, it shows what is powered by the fuse.
Let me know what you find or if you have other questions.
Images (Click to enlarge)
Tuesday, May 4th, 2021 AT 8:43 PM