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Unread 07-20-2010, 11:31 AM   #1
CuminsChris
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97 OBD II plug

This has been driving me crazy! I own a 1997 TJ, 4cyl. manual Trans. In the State of Georgia, if you live in the Atlanta metro area. You have to have your vehicle emission inspected. They do this by hooking up to the OBD II plug. Mine does not work! Code readers will not even work! I have check and there are voltages on this plug, but I do not if they are correct. The Jeep runs great! Dash works properly. Lights come on and go off normal when it is started. But the OBD II plug will not connect to any device. Has anyone ever heard of or come across this problem before?

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Unread 07-20-2010, 11:36 AM   #2
DevilDogDoc
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Does your check engine light work?
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Unread 07-20-2010, 12:05 PM   #3
lostone73
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First, check your cigarette lighter. does it work? all fuses must be good for the ALDL(assembly line data link) to work right. checkall of your fuses. I speak from having the same issues when I moved to Tx. from La.

Let us know,
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Unread 07-20-2010, 12:31 PM   #4
JohnF
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I work in a repair shop. Every instance of the OBD plug not working has led to a blown fuse. Many share with cigarette lighter or power outlet. Check your fuse listing, it may read DLC(Data Link Connector) or similar
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Unread 07-20-2010, 01:33 PM   #5
Jonny Jeep
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The data link connector gets power from fuse 17 in the PDC. Same as the courtesy lamps and radio/cluster permanent live.
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Online factory service manuals (FSMs) and parts lists can be viewed at http://www.jeep4x4center.com/knowledge-base/index.htm
If the link doesn't work properly, look for the service manual link under Jeep Resources at the bottom of the page.
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Unread 07-21-2010, 05:07 AM   #6
CuminsChris
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Thanks for all the good info guys. I have checked Every fuse in both boxes, The one under the Hood and The other behind the glove box. I will check again. I have noticed while having the entire dash torn apart that there is a cluster of plugs that are secured into a wire distribution block behind the left audio speaker. There is one plug the bottom plug that has been cut. I believe this goes to the Original radio. There is a aftermarket radio that was install prior to my ownership of the vehicle. You guys have got the brain working again. This could possibly be the area to look. I will rewire the radio as it should be. Let me know if you guys can come up with any other info.

Thanks again for your help

Chris
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Unread 07-21-2010, 10:41 AM   #7
Jonny Jeep
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If you need help finding out what all the wires go to have a look at the factory service manual on line at Jeep Service Manuals
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Rockauto 5% discount code can be found here... http://www.markviii.org/LOD2/products_services.htm

Online factory service manuals (FSMs) and parts lists can be viewed at http://www.jeep4x4center.com/knowledge-base/index.htm
If the link doesn't work properly, look for the service manual link under Jeep Resources at the bottom of the page.
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Unread 07-21-2010, 10:56 AM   #8
finalreckoning
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1997 TJs didn't have OBDII, they had the older OBDI.
Good luck finding an OBDI reader.
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Unread 07-21-2010, 11:04 AM   #9
George Dickel
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Quote:
Originally Posted by finalreckoning View Post
1997 TJs didn't have OBDII, they had the older OBDI.
Good luck finding an OBDI reader.
Huh? This is news to me. They both utilize a 16 pin data connector...
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Unread 07-21-2010, 11:07 AM   #10
DevilDogDoc
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Quote:
Originally Posted by finalreckoning View Post
1997 TJs didn't have OBDII, they had the older OBDI.
Good luck finding an OBDI reader.
Incorrect obd2 started in 96 my 97 is obd2 compliant. Look at the sticker under the hood
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Unread 07-21-2010, 11:20 AM   #11
CuminsChris
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The Tj rolled off the assembly line in 3-96, but was sold as a 97 year model. As far as I can see, They did not sell a 96 model. that was the year they switched over to the new style. Round headlights, coil springs etc. I am also pretty sure that the OBD I & OBD II plugs are way different.
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Unread 07-21-2010, 11:24 AM   #12
DevilDogDoc
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I am not an idiot I am fully aware of when TJ's came out mine was made 5/96 and titled as a 97 what I mean is industry wide obd2 came out in 96 which applies to our TJ's
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Unread 07-21-2010, 11:37 AM   #13
freeskier93
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97 is OBDII, in Colorado they hook to the car during emissions and It clearly says on the TV screen when they plug in, "OBDII Connection complete". I've also used OBDII scanners at advanced auto parts to clear codes. PLUS you can read codes through the odometer, which I believe can only be done with OBDII cars.
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Unread 07-21-2010, 11:39 AM   #14
CuminsChris
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Sorry, I was referring to Finalreckoning post. Not yours Devil Dog. I totally agree with you

I know it is a OBD II. I need to figure out why it will not connect with any devices. ie. Emissions, Code readers
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Unread 07-21-2010, 01:51 PM   #15
finalreckoning
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Sorry about that. I had been told somewhere that the 98+ were OBDII, not the 97.
Thanks for correcting me!
(I'd always figured that's why 97 had the error code readout, and 98 didn't, and after 98, they were P- codes)
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