Originally Posted by Viper-666

Hello,
after more than 2 years of research and development and more than 1000€ of hardware costs i managed to understand how the immobilizer between engine control unit and skreem works.
And it was possible for me to find a way on which I want to replace the Skreem module. The first (and maybe most difficult) step is to unlock the immobilizer with my hardware and then start the car. This is done

Originally Posted by Viper-666

The most part what you say is true and shows that you have a lot of expertise.

My module would be, depending on the version, a bypass of the immobilizer, which then only needs the original key with transponder to extract new codes from the skreem. But in this version a working key would still be necessary to open and close the car and deactivate the alarm. In the bypass version the immobilizer would also be disabled because you can start the car with all keys who fit or simply by connecting the right wires how often shows in movies.
The Version 2 would also do the opening and closing and disarming of the alarm. And in addition, the transponder would have to be used before the start, so the immobilizer would be retained.
For all versions it would be possible to get a preprogrammed EEPROMs with 8000 codes and instructions how to program the PCM. When the codes are used up you can program the PCM again according to the instructions and use the codes again. This can be repeated infinitely. If you buy two EEPROMs preprogrammed by me you will always have 16.000 codes before you have to reprogram the PCM.
And to disable the immobilizer completely I agree that you have to find first a way to do this and then reprogram the PCM completely.