I have a 2000 T-444E navistar. that i retro-fitted an allison 1000 6 speed (A41 TCM, J1939 throttle), to run standalone..

all is good i can tune the TCM .. and im slowly learning how to dial in my transmission.. there are a lot of unknowns... like changing my speedo parameters in EFILive makes no difference in the pin 25 output.. (not sure why?)..

anyway I also have an A53 TCM that i lknow I cannot tune with EFI, it is also J1939 throttle, etc.. however I was thinking I should be able to read the live PID's. in scan mode? but I cannot do that.. I can read them on the A41 TCM.. trying to figure out why I cannot with the A53. (not talking tuning but reading the PID data)..

if I switch my flashcan to J1939 it seems I get a lot of "this feature not available in J1939".. so im kind of lost as to what J1939 does in the flashscan...

is there something i need to flash into my flashscan V2 before I can read J1939 with it?

-Christopher