Post subject: Obfuscated / Encrypted ROM from 2006 STI
Posted: Wed Jun 18, 2025 12:16 pm
Newbie
Joined: Sun Oct 15, 2023 5:49 am Posts: 5
Hey everyone,
Got my hands on a 2006 WRX STI EDM that’s far from stock, but on stock sh7058 ecu. I was able to read the ROM with both ECUFlash and PCMFlash, but none of the usual map editing tools can interpret the file. Looks like it might be encrypted, locked, or otherwise modified by a previous tuner—unfortunately, I don’t have any details on who tuned it.
I've attached a 7z that includes: The current ROM (read from the car) A known stock ROM for this model
Looking for guidance on two things: 1. Is there any way to decrypt or make the current ROM usable for tuning? 2. If I flash the stock ROM, is there any risk of bricking the ECU, or should it work fine assuming it’s a matching ROM?
Appreciate any insight from those who’ve dealt with this before.
Post subject: Re: Obfuscated / Encrypted ROM from 2006 STI
Posted: Fri Jun 20, 2025 10:25 am
Moderator
Joined: Sat Jul 06, 2013 8:55 am Posts: 3264 Location: NI
the rom has been removed as you didnt tune it yourself (against forum rules).
However, the file you pulled isn't anything crazy its just patched with Merpmod: A8DH200Z.MeRpMoD.Flash.Testing.v00.60.d15.8.5.1809.
The A8DH200Z defs should get you most of the main tables, then you can search around on here/github for those specific merp defs to see the rest of the tables. Personally I'd just go back to a stock rom and start tuning it yourself.
_________________ Good luck and may the logs be ever in your favour!
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