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?
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.
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
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.
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.
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.
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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