PMU not connecting

So Ive installed a Black ECU ,PMU, ADU and gps and usb to can in my r53 mini problem is cant get the PMU to communicate everything else on the can bus works fine ive measured the resistance at the emu and its spot on 60ohms .Does anybody have any idea why or a way to get it to connect

Have you tried to connect with the device on the bench? if you have comms out of the car then check the wiring again. do you see the LED status lights on the PMU when you power up the car?