OBD2 Port Not Working Properly
 

imma just cut straight to the chase, i used to be able to scan my car with my Foxwell scanner but out of nowhere it just stopped connecting, at first I thought it was just a faulty update so I tried it with another OBD2 scanner which is older and more basic. power works and it lights up but it just says no codes detected (I have a misfire so I know that's a lie) if you unplug and replug enough it'll connect using kwp2000 protocol and it'll show my misfire. ECU has been changed before could that be the problem?

how can I even diagnose what's wrong? and my biggest question is how did this even happen out of nowhere?:dunno:

The obd connectors are known to break and will give you the symptoms you describe.

What breaks, specifically the pins? I assume it's the connection pins, where it won't communicate well with the scanner unless you really jam it in, but I want to hear other people's opinions. Also, what do you recommend I do?

Mine was a cracked obd2 block and it allowed the pins to slide back when plugging in the cable. The cracks were small and not visible on mine until a cable was plugged in caused them to show, of course I found that out by pulling the block and sticking my plug into it..

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I have yet to check the OBD2 Port, but I've noticed when I take the connector out of the scanner and put it back in a couple of times (as the OBD2 port is still plugged in the car) it connects. Could this still be from a bad OBD2 port? because it connects after a few tries on the scanner not the Port on the car itself

I had the exact same symptoms. There's no guarantee it's the same for yours, but disconnect the block and plug something in to it and look and see if any of the squares "spread" due to cracks (a Bluetooth dongle is best for maneuverablity)

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how do you pull out the block? Sorry for all these questions im trying to learn.

https://uploads.tapatalk-cdn.com/202...abadc44eb7.jpg
https://uploads.tapatalk-cdn.com/202...c10f64b6cf.jpg
Looks like it's held in with clips (snap in). The repair guide for r/r the trim says to remove the electrical connector and then remove the obd port.

You can likely just release the port and pull it out if you can reach up inside and squeeze the clips. That way still attached to test. I don't know what magic button you need to press on the electrical connector the guide didn't say but you can look for a YouTube video.

Thank you very much I will check it out whenever i can ;)

OBD2 Pin Tester Results
 

Sorry for continuing this old thread but I just need someone to check something for me if its possible.

We just bought another new Foxwell NT710 from Amazon after our old one ended up blowing up on us. Surprisingly enough this scanner properly scanned everything and gave us the codes, as of before it would just tell us it couldn't connect, even with our older scanner.

A nice new feature this one has is pin detection which sounded perfect for my situation, I connected it to the X5 and let it scan and it gave me these results.

Would you consider these results normal or is there something wrong with the Port? Pin 8 and 9 are the ones that give me some suspicion something is wrong. I know I was told to open the OBD2 port but I'm not sure if its necessary anymore, if I face more problems in the future then I will (knock on wood).

I have a theory when I turn on my headlights the car draws more voltage meaning the OBD2 port has sufficient voltage so scanner can connect properly, but probably wrong.

Nothing obviously wrong in that picture. Pin 9 (TD) is not actually used on these diagnostics. Pins 7+8 anything above 2 V is enough for bus to work. Those pins are connected together on the diagnostic interface.

Found this:
Attachment 85175

Wow, I just got a reminder of why it is so painful to use this forum. Took me about 10x longer to make that image (probably unreadable by now) uploadable to the site, vs. to find it on the google machine.

The original URL is at
https://www.flexihub.com/oobd2-pinout/

That is a great feature of the Foxwell NT710.

I have the Foxwell NT520Pro, and have a related story of the OBD2 port going kind of dead for a couple of years ...

I used to use the Foxwell and the INPA (I think) regularly with no problems, got the car perfect. Then did not use either for a while and coming back, the INPA was completely non-functional. The Foxwell kind of worked: would not auto-read the VIN, and would read about half of the modules when doing an auto scan. For the things it could read, it seemed perfectly functional. I read the forum, trouble-shooted, checked connectors, pins, soldered the INPA connector, loaded to a new laptop, etc., and then gave up.

Car ran perfectly during all this.

Couple of years later, my daughter was driving the car down in SoCal and called me to let me know she had just hit a huge pothole that slammed the car and made every light in the instrument panel come on and it looked like a Christmas tree. She had the Foxwell in the car, plugged it in, did a quick erase, and everything went away ... AND THE OBD2 PROBLEM WAS NOW FIXED.

Not the greatest repair method, but maybe it will help those who troubleshoot the hell out of their system know that it just might be near-impossible short of a pothole to fix it.

when I have tools rattling in the back of my car going over a speed bump a little too fast usually gets it all settled down


–awr–

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A case of partially failed ignition switch temporarily fixed by that bump?

I'll definitely keep that in mind for future debugging. Thanks. Are you confirming you think that would give the symptoms I mentioned? Thanks for reading the story there.

BTW, due to other problems and distractions in my life, the car has been sitting in my driveway for a couple of years now, just driven around the block periodically, which it does very well other than some weird electrical issues with the lights being on when they should not (headlights, brake lights, lots of them), even with the key out. I make that a non-issue for now with my convenient battery switch disconnect - otherwise it would drain the battery, set off the alarm, etc.

Mine has a similar glitch. It has happened 2/3 times. If I accidently leave the turn signal lever either left or right, the front turn signal turns on. Once to the lever is in a neutral position, the light turns off. It seems switches keep the body control module awake.

Not a glitch. Turn signal on will illuminate that side's parking lights to make the car visible at night. I've used it many times. Sadly they removed that feature in the e70!


–awr–

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Correct! Works well if you for example have to ditch a broken vehicle for a longer time and can't leave the hazards on.