You don't need  adapter for that particular year. Adapter is needed for modules that use CCD Bus found in older vehicles. Chrysler PCM controllers used SCI bus and  didn't use CCD, but Body systems did. CAN system replaced all of that on newer cars.  Are you able to start the vehicle?

I don't remember having communication problems with Maxisys on Jeeps from that year, but it could be Maxisys software, to find out you need to use a different scanner and see if you can get communication with PCM.

 Jeep is covered under Chrysler diagnostics, just select Chrysler instead and you should have full Jeep access.