So before anyone says its a short or the communication wire is bad, I took it to Volvo today and they were able to pull the codes and reset the check engine light.....
So I'm lost.......

You know I thought I read your post ages ago about swapping the pins, but I couldn't find it for the life of me, so I figured I was just imagining things... With your detailed post over at volvospeed forums, same user name?Geevs wrote: ↑Fri Jul 13, 2018 3:16 pmHi, first off are you certain your car is a 97 and not a 96? I also have a 850R manual from factory but it's a 1996. From what I understand, the manuals were only offered in 96.
Anyway, I had the same problem from the time I owned the car in 2005 and discovered at that time that the M4.3 ECU of the 850R manuals is not fully North American OBD-2 compliant as this model was not offered in the US and only a handful were brought in to Canada. Hence, the reason why any ODB2 reader will not work.
The OBD port does works and the Volvo code reader at the dealership can read the code. To make Vol-FCR or BrickDiag with generic OBD-2 cable work, you'll need to "swap" pins #3 and #7 on the OBD-2 port. I've detailed this in Volvospeed forums - suggest you search there.
What part of Canada are you at?
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