ISTA+ programming issue using Icom

[aade]

If your ICOM is good, it should read out the voltage off of your battery. If it goes below a certain number, I think it's 12.4V or something like that, at least ISTA/P disallows programming. Perhaps that's similar in ISTA/D?

Do you mean "Esys cable" to be an RJ-45 to OBD-II cable?

Yes, it does show voltages and I have done multiple programming sessions before I did a clean Windows reinstall and updated to the 4.39.30
Yes that's the one, the yellow ethernet cable to obd.

So perhaps then the voltage drops too low for ISTA to allow programming. It's a safety feature to prevent bricking. If you were to have a steady power supply (applied in the engine bay) does that change anything for you? This would make sense to me.