Gatorgirl Posted June 5, 2016 Share Posted June 5, 2016 Does anyone know if there is obd reader for a 1987 MJ 2.5. Link to comment Share on other sites More sharing options...
Eagle Posted June 5, 2016 Share Posted June 5, 2016 Yes, I know. No, there is not. OBD didn't exist in 1987 -- it came along several years later. Link to comment Share on other sites More sharing options...
gogmorgo Posted June 5, 2016 Share Posted June 5, 2016 Obd= on board diagnostics, regardless of what brand name you put in it. The Renix 4.0's have it, meaning you can plug a scanner into it and read all the engine data. Whether the 2.5 does or not I don't know, but unless there's a carb sitting on top of your intake, there's going to be some form or other of obd. Calling it obd is going to cause confusion. In an industry-wide setting, OBD2 is what was standardized in the mid 90's, and OBD1 is all the unstandardized stuff before that, by whichever name the manufacturer called it. In the case of Jeeps, we like to refer to the HO (91-95) as OBD1, and refer to the previous generation (87-90) as Renix, but that doesn't mean Renix doesn't have on-board diagnostics, no matter how basic. Link to comment Share on other sites More sharing options...
Marine1Texas Posted June 5, 2016 Share Posted June 5, 2016 Chrysler DRB II you can run and scan live information only. You need the cable for RENIX to use it. The Renix does not store any codes of any kind. So the scan tool is only for when the engine is running and you can see how the sensors are running. DRB-11 does a simple systems test on the sensors out put to the ECU. That is the most you will ever get with a Renix system. Most people do not own a DBR-11 and just go at it with a multimeter. If you having problems the best thing to do is do Crusier54'sTips http://cruiser54.com/ Link to comment Share on other sites More sharing options...
Eagle Posted June 5, 2016 Share Posted June 5, 2016 Calling it obd is going to cause confusion. In an industry-wide setting, OBD2 is what was standardized in the mid 90's, and OBD1 is all the unstandardized stuff before that, by whichever name the manufacturer called it. In the case of Jeeps, we like to refer to the HO (91-95) as OBD1, and refer to the previous generation (87-90) as Renix, but that doesn't mean Renix doesn't have on-board diagnostics, no matter how basic. True. But there are no consumer-grade scanners that can read the Renix data -- you need an old AMC/Jeep scan tool or a professional-grade Snap-On (or equal), WITH the necessary adapter to connect into the Renix system. Even most Jeep dealers don't have the equipment to read the Renix data these days. And the renix system doesn't store fault codes, so the information isn't as useful as what you get from a modern OBD2 scan. So, I'll revise my statement: For all practical purposes, there are no OBD scanners for the Renix system. Link to comment Share on other sites More sharing options...
Gatorgirl Posted June 6, 2016 Author Share Posted June 6, 2016 Thanks for the responses to my question. I saw what appears to be test sockets in the engine bay they have yellow caps on them. Just asking I'm new to working on my own MJ. Link to comment Share on other sites More sharing options...
DirtyComanche Posted June 6, 2016 Share Posted June 6, 2016 Yes, those test sockets are for the DRB II tool to adapt to. You can read some information from them using a multimeter, but for all sense and purpose it's pretty much useless without the tool. Link to comment Share on other sites More sharing options...
cruiser54 Posted June 6, 2016 Share Posted June 6, 2016 This^^. New owner, what issues are you having, if any? Link to comment Share on other sites More sharing options...
Gatorgirl Posted June 6, 2016 Author Share Posted June 6, 2016 Hey, I'm the original owner of this MJ. I've always had someone doing the work on the MJ. I finally retired and decided to try my hand at doing it myself. My biggest problem seems to be rough idle. I'm in the process of doing your tips. Done some,but not all of the grounds. Now I'm cleaning C101 connector, it was so clogged up you couldn't see anything inside. I'm going to soak each side connector in some brake cleaner for a couple hours to see if that will get the rest of it out. I would like to thank you for all these tips. You and all on cc are very informative. Probably will have a bunch of questions. Link to comment Share on other sites More sharing options...
cruiser54 Posted June 6, 2016 Share Posted June 6, 2016 Hey, I'm the original owner of this MJ. I've always had someone doing the work on the MJ. I finally retired and decided to try my hand at doing it myself. My biggest problem seems to be rough idle. I'm in the process of doing your tips. Done some,but not all of the grounds. Now I'm cleaning C101 connector, it was so clogged up you couldn't see anything inside. I'm going to soak each side connector in some brake cleaner for a couple hours to see if that will get the rest of it out. I would like to thank you for all these tips. You and all on cc are very informative. Probably will have a bunch of questions. Welcome. Let's hear the questions. Link to comment Share on other sites More sharing options...
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