My passenger sliding door was very hard to open and the motor could not close it – it would reverse and re-open.
I ended up finding that the middle hinges on both sliding doors were rusted and seized, more on the passenger side.
I removed the middle hinges, lubricated them thoroughly and worked them with two prying bars then by hand until they started working back and forth easily. Sprayed the hinges with lithium grease and put back on.
As to the windows, they work, but if auto-closed, they both re-open by 2 inches. I was told it’s the pinch sensors, but did not bother looking into that further.