Jeff jeeps Posted February 15, 2021 Share Posted February 15, 2021 I need to trick the 97 4.0 jeep pcm to think the automatic transmission is still there. Put a ax15 in and took the auto out and changed the flywheel. Its throwing codes for the torque converter circuit and shift cylinoid Link to comment Share on other sites More sharing options...
BeatCJ Posted February 15, 2021 Share Posted February 15, 2021 Probably work better to find a manual PCM. I don't know the cost, so take that for what it's worth. Link to comment Share on other sites More sharing options...
Jeff jeeps Posted February 15, 2021 Author Share Posted February 15, 2021 Do you know if a wrangler pcm will work Link to comment Share on other sites More sharing options...
Dzimm Posted February 16, 2021 Share Posted February 16, 2021 Just take the CEL bulb out and you'll never know! Only proper fix is to swap the PCM, not really a way to trick it to think the trans is there and working unless you were an electrical engineer and came up with some circuitry to do it. Link to comment Share on other sites More sharing options...
BeatCJ Posted February 16, 2021 Share Posted February 16, 2021 I don't. Do you have access to one? Link to comment Share on other sites More sharing options...
yxmj Posted February 17, 2021 Share Posted February 17, 2021 A wrangler pcm (YJ) will work (with some tweaking) ( you can use one for both 2,5 and 4.0......Just leave off injector 5 and 6 if you have a 2.5) you might have to get the correct CPS Link to comment Share on other sites More sharing options...
Sir Sam Posted February 18, 2021 Share Posted February 18, 2021 A YJ pcm won’t work in a 97+ XJ. ecus can be reflashed to a different PN in some cases. I had a customer in France needing a non security pcm for a 97xj, so we had a federal ECU reflashed to the California/export PN and to match his vin. Link to comment Share on other sites More sharing options...
omega_rugal Posted February 18, 2021 Share Posted February 18, 2021 get a manual ECU or ignore the light... Link to comment Share on other sites More sharing options...
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