Please help mercedes me9.7 ecu

[Mr Mo]

Hello every1 I have an issue with the me9.7 ecu . The vehicle come in as non start and discovered ecu faulty so I got a donor ecu and I tested on the car it was ok so I opened the New donor ecu and only swoped the eeproms around from the damaged ecu to the donor ecu an now the donor ecu fault no communication can some1 please help thank you

[mercis]

clone bdm flash and swap eeprom

[Ebie]

you must change flash with eeprom
or virgin donour ecu and program with star

[Mr Mo]

Thank you for replies but just a quick question why is the ecu not communicating now because I put back the original eeprom

[volismb]

Thank you for replies but just a quick question why is the ecu not communicating now because I put back the original eeprom

If the ecu is not communicating this means you must check your soldering

[Mr Mo]

Thank you all for the replies yes I did resolder it and it worked but after I did switch ignition off and back on it does not communicate then I remove eeprom and resolder it works again and yes I did solder very well

[Mr Mo]

Could it be possible that the eeprom data is corrupt

[volismb]

Could it be possible that the eeprom data is corrupt

If the ecu was working fine before your soldering then you can answer the question yourself I think. What exactly are you trying to do?

[Mr Mo]

Volismb thank you for reply well I was swooping the eeprom from faulty ecu to working donor ecu to see what happens and now this started happening I did solder very well and when it loses canbus communication I can read ecu via k-line and in actual data I read coolant sensor and it shows -40dg as if it disconnected and once AGAIN I resolder eeprom again coolant temp reads good e.g..

[Mr Mo]

I have a bdm100 but I would like to know how to connect wiring directly on the ecu pads because I'm really lost my adapters don't make sense can some1 please explain the connection directly on the ecu without using adapter please