sahinonder

I have a 2016 CD. Tpm stopped working, had the sensors replaced (it wasnt necessary probably but did it any way). Tpms does not kick in flashes for a minute and goes solid. X431 does not see the tpms and gateway also does not see the module gives c12015 error. Got a new module from the online dealer plugged it in still does not work and x431 doesn't see it. If it needs to be coded, shouldnt it show up as a module first or is there another secret way to activate or code it? I have checked the pins at the socket and they show 2.5v on 2 of them when ignition is on. Isn't it suppose to be 5v?
I have a wiring diagram for the older system which is irrelevant so if anyone has it for 2016 or upper models where I can see the pin info and what is connected to where, that would be great.
Thanks in advance