After failed attempt and many other tries, i resume with same problem not solved.
I wonder that i remove the chip - battery (the 3V one) from somewhere, will work?
This equipament should not have many options and settings.
I think that the previous procedure with " I + 5 " would work at biggest truck's like "U" series witch have another keyboard controller (bigger and with more options).
Other options please?
Many advance regards!