Lexus ISF / IS-F / LFA / LF-A  Forum banner

ISF ECM Picture request, reflashing ROM needs

3892 Views 16 Replies 10 Participants Last post by  tgui
Anyone here pull their ECM yet for AEM piggyback or otherwise? If so PLEASE post a high res picture of your ECU cracked open! I'd love to get an idea of the chips used.

Beyond the down payment, I haven't even made my first monthly payment yet so I'm reluctant to start digging for my ECM and opening things up :(

My goal as you could assume, is to at some point crack the stock ECU for tuning. Many have tried, all failed and there is a high chance I won't make much progress.

I have a background in tuning coming from the Subaru world. I've got (one class remaining) a masters in computer science focusing on things such as compiler technologies and combined with my experience in reverse engineering binary data I might have a chance.

Hell, I even wrote my own software suite for ROM editing and ECU logging.
simpletuneDOTorg (I'd post the URL, but I don't have the post count to do so yet)

The reason I need an idea of what chips are involved with our ECUs has to do with what doors are opened for ROM flashing. JTAG is often available for chip flashing. Subarus use Renesas chips which include their own custom means for flashing as well in addition to flashing over ODB2.

Also, reading the ROM from the ECU for purposes of cracking the checksum algorithm is important as well.

I'm not full of hot air but a realist... perhaps I'll get lucky... or I'll open the doors for someone more experienced than I to take the reigns.

So, anyone have some pics?

1 - 1 of 17 Posts
Jesus Cayman you get your stuff from Dan also, lol. Small world i miss the suby community but thats what the forums and autocross is for. As for the ECU i know Andy can help as stated but Tgui i can probably get you some shots Monday from Janoy. I know he stated he was looking into what you are doing. That is going to the source of the parts for the code, instead of trying to get past lexus. ;)
1 - 1 of 17 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.