Had the same problem with a replacement 501 JIB. Jumpers J3 were in serial position instead of USB. Put in 1708 position and now have turbo data. It also allowed me to see good and bad packet count, which had gone away with new JIB. Unfortunatly bad packet count still over 30%. Tried J1 off and on with no noticable difference.
I do not get turbo or extended turbo data showing up on the application. How do we find out what data is available for the Cummins ISB275?