Passenger rear window will not roll down. Neither the switch at the door, nor the driver switch, will work.
when trying it from the driver switch, I message pops up stating the Rear Right Door is Ajar, then goes away. No door ajar icon, or dome light. Just that message

 

What you might want to check, the master sw on the driver's door provides both, power and ground for the window motor to operate. That would be a good place to start checking.
In the up position the two terminals involved will have power in one side and ground in the other ,then when you go to move the window down those terminals switch polarity , WHEN everything is working right.
If you don't get those results there is most likely an open in the wiring or motor assy.