2003 ISC 8.3 in RV with bad ECM

[dwcjwerfner]

I am an IT guy and I am surprised how everyone even figures their way through the all of this crappy software.
Most of my problem is I believe because I am trying to deal with a 23 year old ECM that Cummins doesn't care about anymore.

So my l ECM is a CM554, C T only has ISB and QSB/C modules listed for that product, so I can't do the backup. And actually no listings at all for ISC.
The ECM code is J91051.18 which is an ENC code and again the only ENC is for the ISB

I don't think I can put pictures here to show.

Also a FYI for anyone else. I downloaded and went through every single DVD that was released in December 2025 and the J91051 is no longer on them. I was looking to make sure I was putting on the newest calibration. That is what you referred to as them deleting older cals I guess.
Good thing I have the 2022 DVD's.