why would you want a bad ecm?do they rebuild them?if you reprogram the bad ground parimeter inside will still be the problem?
I have yet to obtain a bad one, so no I don't rebuild them. But it may be possible.
In theory, on a properly designed piece of hardware and software, codes 52-55 should never happen unless there is a hardware issue. The service manual doesn't instruct the Harley Tech to attempt to reflash the app, calibration, or any other parameters to see if it fixes the trouble codes. The instruction given is, if these codes occur, replace the ECM. Having said that, I have an extensive background in firmware and hardware development, so I understand that the "replace" recommendation by the service manual doesn't necessarily mean the ECM is unfixable. It could be outside the skill set of how a tech is trained, or just may not be cost effective due to time involved. Replace, not repair, is s.o.p these days. However, I am suspecting there is a real hardware issue.
So back to my reason - I have several projects going on, one of which is a datalogging product that needs lots of testing on a variety of models and failures. I want to know what shows up in a datalog trace during runtime when an ECM produces any of the codes 52-55. Ideally, I want at least four ecms showing each type of failure, or any combination thereof.
I would also like to cut one open (removing lots of pot material), particularly one with code 54, and do a bit of chip-level diagnostics.
Probably more than you wanted to know, but I explained a bit more here in case others are curious as well.