Originally Posted by izergfx
Post a full log from the renesas tool, and a picture of the wiring.
It also might be worth trying with a bone stock, freshly downloaded rom. It's possible that the one you are flashing is corrupted if it throws a checksum error.
Everything is unhooked and put away now, and I don't have a log from eirlier, but. I have tried 2 stock roms for the 08/09 sti and one tuned rom from an 08/09 rom. All with the same error or in ecuflash the same success, but then when the key is on the car acts like there is no ecu connected, dccd and sdrive amoung other lights flashing. Thanks again