Quote:
Originally Posted by Spaceywilly
Do you mean Subaru ECUs? They are the same between JDM and USDM AFAIK, there is only AVCS and non AVCS ECUs that you have to watch out for. You can get a JDM EJ207 and run it off a 2002 USDM WRX ECU, you just have to make your own AVCS wiring bundle and obviously a new ROM.
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Doesn't really matter though. It's as simple as a few pinout diagrams and splicing some wires. But I t wouldn't really matter unless you were intent on putting JDM engines in USDM cars and vice versa, but with hat's out there for Subaru, why bother?
Quote:
Originally Posted by old greg
Yep. OEMs never design their own ECUs, it's all outsourced to suppliers like Denso, Delphi, Bosch, Magneti Marelli, etc. Look at the labels on any ECU, there will be a logo for the vehicle manufacturer, and a logo for the ECU manufacturer.
To the best of my knowledge, Denso supplies ECUs for all of the turbo Subarus and some of the N/A ones as well. On top of that Denso is a part of the Toyota Group, so it seems like a pretty safe bet that they supply the majority of Toyota/Lexus ECUs as well (I don't have any first hand knowledge though).
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Toyota has a VERY heavy hand in the design and especially software of their ECUs. Yes, Denso is primarily the supplier.