P0453 electrical issue

5.7 tundra p0453 code won't clear, engine light stays on constantly no matter what we do.
Changed purge valve and canister, wiring clip at the valve looked good, but theirs about 8 wires going into it. Can anyone tell me how I can test them to see it's just a bad connection, or corroded wire. I've had friggin mouse trouble in the past so who knows. The registry is going to suspend my plates because it won't pass

 

So I guess what I'm asking is if anyone can tell me what each wire is for or at least what voltage each one should show on a multimeter so hopefully I can zero in on the problem

 

https://www.tocores.net/1438/sistema_evap.html

This one is for Toyota Corolla but is same canister for tundras is Spanish hope this helps you diagram for plug voltages and resistances are there, if you find out what happens to yours let me know have exactly same issue with mine.