Sounds good, here is a guide to help check the wiring and the engine wiring diagrams as you have requested:
The five-volt reference can be disrupted by a shorted sensor, when you lose the reference, I would start unplugging sensors to see if it comes back. Check out the images (below). Let us know if you need anything else.
Images (Click to make bigger)
Saturday, January 27th, 2024 AT 12:04 PM