I don,t think its the main ECU there is a separate little box which is next to the instrument binnacle up in the dash it is connected to the sensor which is around the top of the ignition barrel as you insert the key it reads the code and in turn this allows starting . I went through this process 18 months ago but I was lucky we still had the original key and Mr Minit copied the code and transferred it to the new key . I really do not know if the code could be read from the little box or not , its also quite a bit of work to get it out with the wiring etc plus you have to remove the instrument binnacle which not so hard to do . Maybe someone else might have another way for you .