creekscout Posted January 16, 2007 Share Posted January 16, 2007 The other day my maint required light came on a few miles after it turned 120k miles so I suspected it might be an automatic service reminder. I called a Jeep dealer and they confirmed this as the likely cause. Now I need to know how and where to cancel out the light. It is a 92 comanche. Link to comment Share on other sites More sharing options...
Pete M Posted January 16, 2007 Share Posted January 16, 2007 Pull the bulb out. :D Link to comment Share on other sites More sharing options...
Kenosha Warrior Posted January 17, 2007 Share Posted January 17, 2007 where is the Maint Req'd light? Would it come on in a heep with 296833km's on it? Link to comment Share on other sites More sharing options...
KYMJ Posted January 17, 2007 Share Posted January 17, 2007 I just removed the unit. It's located on the kick panel under the dash-the box with all the gears in it. Link to comment Share on other sites More sharing options...
ejndssn Posted January 17, 2007 Share Posted January 17, 2007 isnt that unit the timer for the o2 sensor Thast is what i thought it was and i have unplugged mine years ago :brows: just another question didnt they have the obd-I on board the 92 MJ's and did this provide some indcations for service required :dunno: Link to comment Share on other sites More sharing options...
jeepdoggydogB Posted January 17, 2007 Share Posted January 17, 2007 isnt that unit the timer for the o2 sensor Thast is what i thought it was and i have unplugged mine years ago :brows: just another question didnt they have the obd-I on board the 92 MJ's and did this provide some indcations for service required :dunno: I have a 91 and the 91 and later are the ODB I, I happen to have an OEM Chrysler code reader that I got fairly cheap on Ebay that I used to reset the MAINT REQ light. If all you want to do is make the light go off I would remove the bulb as Pete suggested. For me that tool has been great for troubleshooting a host of other problems much easier. Right now that reader has helped me isolate certain issues in my ignition system. When I put in the JC bored out throttle body assembly my gas mileage and perfromance decreased significantly I ran some diagnostics and found my TPS was at .75 OHMs instead of the 1-4 OHM range accross the throttle (yes I am too lazy to run an OHM meter). Not what I would call an absolute necessity of a tool but it sure has come in handy for me. Link to comment Share on other sites More sharing options...
PRLJEEP Posted January 17, 2007 Share Posted January 17, 2007 Anyone know if they may have placed the OBD1 in some of the later made model year 1990 MJ's? Anyone have pictures showcasing the difference between the two reader ports? OBD1 and the one that requires a $3000 reader from Snap-on? Link to comment Share on other sites More sharing options...
87manche Posted January 17, 2007 Share Posted January 17, 2007 Anyone know if they may have placed the OBD1 in some of the later made model year 1990 MJ's? Anyone have pictures showcasing the difference between the two reader ports? OBD1 and the one that requires a $3000 reader from Snap-on? the easiest way to make this determination is to look for the ECU. Chryco ECU's were under the hood, renix ECU's are under the dash, drivers side, right above the accelerator, big silver looking metal box. Link to comment Share on other sites More sharing options...
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