Trouvé !
First 09 - Central Electric is coded to "Charisma engine only" byte 7, bit 5, change 0 to 1 (you may also have to change byte 7 bit 2 as well), byte 8, bit 2, change 0 to 1 and byte 17, bit 7, change 0 to 1. In byte 8 bit 3, 4 and 5 from 0 to 1 will respectively switch steering, suspension and sports differential modes on in addition to the engine mode, although the latter two modes are undoubtedly of no use without such hardware in the car. Byte 7, bit 4 is apparently for active steering, again probably of use only if such hardware is in the car. Then 09 - Central Electric, Security Access - 16, Adaptation - 10, change channels 63 to 66 to value 4
Non je doute que ça puisse indiquer une quelconque erreur. Au pire on la repasse d'origine si ça joue pas...