Yeah I see what your getting. Try 3 on off and then on and see if it reads. Just a guess I got an 88 no codes but I did a lot of those checks working at AZ.
89YJ 2.5L TBI, AX-5, NP231 SYE, Ford 8.8, Yukon Grizzly, Tom Woods Shaft, 33" BFG T/As, 4" lift, Warn VR10000s.
AF Jeep Club Tail #184