It sounds like the main relay stopped working but we should check the fuses #1, #2 #13 and #12 first. Here is a guide to help and the location of the main relay just in case. Check the fuses with the key on, engine not running.
Also, you can try a hard reboot which is done by removing the negative side of the battery, with the cable loose from the negative side of the battery, hold it to the positive terminal for 1 minute this will discharge the memory capacitors in the BCM and PCM allowing the system to reboot.
Check out this guide as well:
Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
Images (Click to enlarge)
Saturday, August 27th, 2022 AT 10:20 AM