Problem:
Some people have problems cloning Volvo XC90 CEM with Xhorse multi prog. It is screwing up 7 different data.
For example:
Tried to clone Volvo XC90 CEM processor M30855FW with xhorse multi prog,
read ok, save file ok, write ok, verify failed 7 different data in the last 3 rows
FF,s changed for 00,s in 7 locations , checksum differences.
Solution:
You can read and WRITE this MCU with Xhorse Multi prog!
Just need to change the way you get the data from and IN the chip.
Go to MCU (instead of Volvo Immo) then renesas M30855FW(UART).
Now you can, if you make the extra changes write without error.
Use the UART protocol, not the volvo CEM.
Reading original one for cloning is enough 6-wire volvo protocol, but to write donor we need to use UART pinout!
