Here comes the similar problem:
BMW F30 after desoldering 95128 eeprom all data lost (maybe overheated). Using xhorse vvdi prog and vvdi2.
In new eeprom i wrote data from another FEM but car now starts only from the emergency coil, remote did not works.
i try wrote many dumps from another fem. update FEM with ISTA , but remote still not working.
Tried to desolder with hot air, the eeprom may have been damaged.
Is it possible to restore data? What is the procedure to recover the FEM? Or do I need to buy new FEM?
Solution:
NO NEED TO BUY ANY NEW FEM.
Find any 95128 dump make all programming FEM with vvdi2.
Restore coding
Now in car key must start only from the emergency coil.
next
At first read isn by vvdi from the working key.
Erase key with vvdi.
Dissemble key.
Renew key by vvdi key tool or vvdi prog.
Program “old” -new key with vvdi2.
Also if it is manual gearbox you will need to virginize the elv.
AND ALL !!!!
You can also restore FEM with autohex, same procedure as above.
For the guys wondering why when a FEM flash fails you cannot fix it.
FEM has 2x SWFL, they control the ignition, if both SWFL become corrupted then the FEM does.
not know when and how to cycle the ignition, this is why you hear the relays clicking, if the bootloader is ok you may be able to restore the SWFL by updating istep, if the BTLD is corrupted then its likely a new FEM
if only 1 SWFL is corrupted and the other is ok then the FEM can be restored.
You also have other ways to program BMW FEM key, via clip solder free adapter or with bench test platform.
For example:
VVDI Key Tool Plus Program BMW F30 FEM All Keys Lost via Godiag
User feedback:
Car worked after writing file to new eeprom. Vvdi2 also let me correct the mileage.