Welcome to the forums Ryan.
I would start by downloading your owners manual if you do not have the paper copy.
http://www.easy-share.com/1912434051/16142-kj_sm.pdf
It will take some time in free mode on easy share. 2002 not available on Jeep site anymore. Maybe this will point something out for the 2002 for you.
A single ding could be the rear "glass" or LowWash,/lowfuel, so open the glass and confirm it is displayed properly and you got lots of washer fluid. Display is on the mileage/ led.
Make sure you are set to read the mileage not odometer readings initially.
Do you have an overhead display unit (EVIC) as well?
When u stop and it dings immediately look at screen and hit the odometer reset button twice this takes you quickly to odometer and then back to mileage and may force the message...,and see if it reads back anything.
Hopefully others will "chime" in and be able to help further, otherwise a stop by the dealer may be needed.