2009 Cummins ISX CM871 communication error? or not?

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(09-26-2023 )trucklogger2 Wrote:  Did you guys open up ESA to look for clues? It could help. also as I am finding out with my 09
is there is green goblins in most of the harnesses on the modules like the modules behind the gauges in the dash that runs signals and windows and door locks and such.This is probably from bad ground engine to frame.

I was a little pressed for time so I took the new Re-Man ECM off and let KW test it. At first they said it was fine after performing a bench test. I towed the truck over to them after that to see if they could trace down another issue, and here is their diagnosis...



So ECM # 2 arrives tomorrow