Hey bud, I had the following problem. The seatbelt would go to forward position once door was opened, but would not go back once i turned the car on. I took it to the dealership, they looked at it, and diagnosed it as a faulty return belt or something like that. I asked about the warranty, and they told me yes the inspection is covered, but Acura no longer makes the parts for my car (1992) so even if they wanted to fix it, they couldnt, and they wouldnt put in a junkyard part.
So what i did was go to the junkyard near my city, and took out the supposed faulty part. After replacing it in my Teg, the same problem would occur. I concluded that it is highly unlikely that BOTH seatbelts have a faulty return belt. After doing some compare and contrast of my passenger door(worked 100% fine) to driver door, i was hearing a "Click" when the door was closed on the passenger side, and was not when it was closed on drivers side.
What happened to be my problem was the electronic sensor that senses when the driver door is open or closed had rusted over or something. What im talking about is the circular "holes" on the car (not door) right to the left of your shoulder when sitting in the drivers seat. Try cleaning those, and seeing if that fixes your problem
The only reason i typed this all out is because i literally spent hours trying to figure out that damned seatbelt, and I was only hoping to find help somehwere, but i never found it. So now, I am your help :roll:
Good luck