Hi jay which model jeep is this your working on? abs is supported and fully developed on all Chrysler vehicles and it is the most trouble module on all American cars with communication issues. most of the time when a data bus issue occurs 1 out of 10 is the abs causing it. also auto vin id is only possible on Chrysler can bus vehicles, this feature is not available/developed for pre can bus vehicles, most likely your model year is not, the reason why it didn't work. I am mostly inclined to a particular issue with your tool or the vehicle your working on rather than a general tool issue since I am not having it on mine at this moment. hope autel can figure this out. best regards.