pcmhacking.net

So i got an ecm in the other day that apparently had been re-linked into a car & flashed but car wouldnt start still.

So i pull tune out & notice that security isn't active & the serial number is all messed up, from that alone i realize the dealership or someone has flashed an invalid OS over the top of what was originally there.

So i managed to use tazzi's tool and used a good known bin file from another ecu using the clone option, but I'm curious to know where in the bin file the security linking numbers would be.

Attached is a picture of the good new bin file vs the corrupt original one on the right, is the highlighted address correct? OS is 12633016

Cheers
Dave

Yeah that looks good.
But I believe there might be other security data that moves too, since changing only that number doesnt seem to complete the job from my past experiences.

so same code but in multiple spots? i'd assume it all has to be within the eeprom data section?

edit, found same code further down at E6D8