Comment by ErroneousBosh
13 hours ago
You don't know anything about late-90s Lucas/SAGEM GEMS ECUs do you, or Range Rover BeCMs?
I'm currently picking apart the firmware in those because it is now impossible to get replacement ignition key fobs, and it just can't be that difficult...
It was 16 years ago, and I only worked with what got to the US. I don't remember much and not those at all. I saw a few how to program key fob documents but we decided that was a dealer service and so I never implemented it. still generally just send the right 4-8 bytes and press a button on the fob in a minute. In any case it sounds like you want a different end: making a fob or bypassing them was never something I got anything on.