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It was totally dead, just replaced ecm.

This is beyond the standard errors, I think possibly the ecm has a damaged boot loader section or is corrupted. Best I can tell , if the smarty can?t recover it then it?s toast.

I have a cm848 in an 03 Cummins that seems to have gone brain dead, can read a serial number out with one scan tool but its stuck in rom boot and wont flash. Gets to about 58% on flash and then says...