I'm trying to diagnose an issue where my OBD won't connect to a reader. It's been checked twice with two different readers, one at the State Inspection station and the other at the DMV. I'm looking through videos and they say to check the OBD fuse first, but I can't locate that fuse as it's not listed in the manual. Does anyone know which specific fuse controls the OBD in a 2010 CX-9 Grand Touring? Thanks for any help.

 

If the car runs fine, probably you don't have a fuse problem. Check the port itself for loose or bent pins. If not! Try to reset the computer. Disconnect the neg. battery cable, get in drivers seat and pump the brake pedal 5 times, after 10 to15 secs reconnect the battery cable. The computer should clear all errors. If the car
runs fine, and its not a problem for any reason(registration, or
operability), then you can take it down the road for 30-45 min. and test if obd2 port will work

 

Thank you. I'll give it a go.

 

I have a 2011 CX9 and am experiencing the same stalling issue. I believe it’s a torque converter/auto trans related issue, so i’m going to begin with a long overdue fluid flush.

 

Welcome to the forum
I am not sure is there a question here?
How many miles on your Mazda
Basically are you sure you responded in the correct thread because the related issue ae not transmission indicated? and when if ever was any service done to your transmission?

Maybe and just "spit-balling" here you should start your own thread about your issues and list details as well more information about your Mazda?
IMHO you are posting in the wrong thread.