jimoshel Posted February 22, 2015 Share Posted February 22, 2015 Does the 1990 MJ have the OBD1? if so where is it located? Link to comment Share on other sites More sharing options...
Incommando Posted February 22, 2015 Share Posted February 22, 2015 I am pretty sure 91 was the first OBD1? Link to comment Share on other sites More sharing options...
jimoshel Posted February 22, 2015 Author Share Posted February 22, 2015 Me to. But I'm just not sure. I was asked the Question and didn't know for sure. Link to comment Share on other sites More sharing options...
Dando Posted February 22, 2015 Share Posted February 22, 2015 My 1990 does not have obd1 Link to comment Share on other sites More sharing options...
shelbyluvv Posted February 22, 2015 Share Posted February 22, 2015 1990 was RENIX still. 1991 was the first year for OBD-I. Link to comment Share on other sites More sharing options...
john02885 Posted February 22, 2015 Share Posted February 22, 2015 Thanks a lot for the info! how do i check out when i should have problem&where can i pick up after market on line for the comanche! Link to comment Share on other sites More sharing options...
Bobolink Posted February 22, 2015 Share Posted February 22, 2015 What? Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 22, 2015 Share Posted February 22, 2015 There's no connector for OBD1, only for OBD2 which started with the 1996 models. This is how you check for fault codes with a 91 or 92 MJ, no meter required: http://comancheclub.com/topic/28111-reading-obdi-91-and-92-mj-fault-codes/ Link to comment Share on other sites More sharing options...
gogmorgo Posted February 22, 2015 Share Posted February 22, 2015 Thanks a lot for the info! how do i check out when i should have problem&where can i pick up after market on line for the comanche! Are you looking for a scan tool for your MJ? If it's a 1991 or newer, it'll be OBD1, and you won't need one. For 1990 and older (i,e, Renix) there is a scan tool, but good luck finding one in working order for less than you paid for the MJ. Link to comment Share on other sites More sharing options...
1987Comanche Posted February 22, 2015 Share Posted February 22, 2015 The Renix diagnostic ports are located on the pass side wheel well near the battery. If memory serves there are 2 ports, usually covered with yellow weather tight plugs. They are under the black plastic cover that hides some of the relays. Snap-on has (had) the Renix adapter for some of their older scan tools. I hooked up to Meg with the MT2500. Link to comment Share on other sites More sharing options...
mnkyboy Posted February 22, 2015 Share Posted February 22, 2015 The OBD1 port on 91 and newer is next to the computer on the drivers side and any obd1 scanner with a Chrysler plug will fit it but as stated you don't need one. The only one i have seen that will scan a Renix is the old Snap On brick (mt2500) and they are getting hard to find anymore. Link to comment Share on other sites More sharing options...
54bobby Posted February 22, 2015 Share Posted February 22, 2015 not sure if there the same but there's quite a few mt2500 scan tools on ebay. Link to comment Share on other sites More sharing options...
mnkyboy Posted February 22, 2015 Share Posted February 22, 2015 You can find them used,the hard part would be finding the Renix stuff for it. Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted February 22, 2015 Share Posted February 22, 2015 I have an old Drb factory scan tool . It's missing the display , which I'm still looking for.... Link to comment Share on other sites More sharing options...
jimoshel Posted February 22, 2015 Author Share Posted February 22, 2015 If the only thing missing is the display, why can't you just use a regular oscilloscope? Or do the neccesary mod and use a TV? Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 22, 2015 Share Posted February 22, 2015 I have an old OBD1 factory scan tool . It's missing the display , which I'm still looking for.... DRB-3? Link to comment Share on other sites More sharing options...
Blue XJ Posted February 22, 2015 Share Posted February 22, 2015 It's not the DRB3, its just the DRB for that vintage. You need the Jeep Eagle adapter for it as well. I am lucky enough to have one, it works good at live streaming data and testing certain systems and sensors, but there are no stored codes with it. Link to comment Share on other sites More sharing options...
Incommando Posted February 22, 2015 Share Posted February 22, 2015 The OBD1 port on 91 and newer is next to the computer on the drivers side and any obd1 scanner with a Chrysler plug will fit it but as stated you don't need one. The only one i have seen that will scan a Renix is the old Snap On brick (mt2500) and they are getting hard to find anymore. This^. There is not an underdash port like for OBDII but there is a port under the hood by the ECM. Any McAuto parts place can loan you a scanner for OBDI Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted February 22, 2015 Share Posted February 22, 2015 I have an old OBD1 factory scan tool . It's missing the display , which I'm still looking for.... Yep , just fixed it lol. DRB-3? Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 22, 2015 Share Posted February 22, 2015 This has been an interesting thread. I have an Actron 9145 scanner I've had for years that I use for my OBD2 vehicles. From this thread, I've learned that I can purchase an Actron CP9129 Chrysler adapter cable like the below (~$25) and my Actron 9145 OBD2 scanner can read my 91 MJ OBD1 fault codes by plugging it into the test port near the ECU. I never knew this. But what I don't know is how much good it will do me. Does it do more than just "read" the codes? I can already do that with the IGN key trick. Any benefits besides saving wear and tear on my ignition switch? Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted February 22, 2015 Share Posted February 22, 2015 When I read the fault codes for my mj with the 95 xj driveline I checked with the key and scanner , all codes were the same . Its easier to see a list of codes then count flashes . I don't know if you can watch a live stream data either , but that would be an advantage... Link to comment Share on other sites More sharing options...
ggcnash Posted February 22, 2015 Share Posted February 22, 2015 Def a lot easier then the flashes Link to comment Share on other sites More sharing options...
ggcnash Posted February 22, 2015 Share Posted February 22, 2015 I know some models are live scanners and some are just code readers Link to comment Share on other sites More sharing options...
1987Comanche Posted February 23, 2015 Share Posted February 23, 2015 I have the Chrysler OBD I connector for my Vetronix/Bosch MTS3100 and, in addition to streaming data, you can also run through various test sequences (injector balance test for example). I primarily use the MTS3100 on my GM vehicles (it's basically at Tech 1A brain with additional features) and there are some GM things you simply can't do without it (crank variation learn on a Vortec engine or cycling ABS motors to finish bleeding a brake system). I don't recall having a library of test sequences for the Renix system on the MT-2500. The Solus and the OTC/SPX Genisys didn't come with Renix cables and I didn't seem them listed in the catalog. I think the DRB and MT-2500 are the only ones that can speak Renix... Link to comment Share on other sites More sharing options...
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