When you read your ECU for the first time with ECUFlash the 2004 USDM has multiple choices, does it matter which one you choose when reading your map?

 

yes it matters, if there is no direct match, then you have to find the closest one, keep in mind there may be minor changes required in the definition file (the choices you select from)

Post the ECU Identifier it comes up with.. Someone probably has already matched it or created an updated DEF for it.

 

Ok, Thanks Jack. My ECU Internal ID is 96420008, so I picked 96420007 from the choices when I downloaded my ROM. It sounded the most logical, and everything seem to load fine.