OBDII is in everthing 1996 and newer, but tuning software is very expensive and more complex, thats if the Jeep engine is covered under any of them...

These are for PIDS, the error codes, the ALDL side and they are all not identical but have standardized most paremeters for emissions, each manfacturer still has other PIDS and they can change from car to car, car to truck, auto to manual etc... and I know very little about this subject. My Scan Tool tells me anything I need to know about any OBDII car... and OBDI for that matter.