Can I get the engine wiring diagram for the PCM?

Sounds good, here is a guide to help check the wiring and the engine wiring diagrams as you have requested:

https://www.2carpros.com/articles/how-to-check-wiring

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.

Thank you for the schematics. Still having the same issue. Engine dies, no 5-volt ref and no buss message on odometer. If the connectors to the PCM are wiggled power comes back. PCM has been replaced with a rebuilt. I'm thinking the new PCM is bad as well? Unplugging sensors has no effect. All pins and connections at the connectors look good as well.

Thank you for the schematics. Still having the same issue. The engine shuts off, no 5-volt ref and no buss message on odometer. If the connectors to the PCM are wiggled power comes back. PCM has been replaced with a rebuilt. I'm thinking the new PCM is bad as well? Unplugging sensors has no effect. All pins and connections at the connectors look good as well.

I have seen an instrument cluster cause this issue as well. Can you try unplugging it to see if the 5 volts comes back? Also, it does sound slie the new PCM is bad as well, did it have the same problem with the old PCM?

Yes same problem with the old PCM.

I can try unplugging the instrument cluster and let it run to see if it shuts off if the engine will run that way??

It might, let's give it a try. let me know what happens.

anything?