How does AT-200 Clone MSV80 DME Correctly?

I’d like to share my experience with the AT-200 ECU Programmer and MSV80 unlock upgrade.  I had three codes on a customers’ vehicle that came in 2011 BMW 328Cic:

2E7C BSD (Bit-Serial Data Interface) data bus communications fault

2F71 Digital Motor Electronics (DME): electronics box fan, activation

2B3D Diagnostic Module Tank Leakage (DMTL), system fault


While it’s possible all these present faults could be true, it would still be unlikely so I decided to replace the DMEI had used the AT-200 to replace other ECUs without issue and very easily (MSV80 license is required), however, the MSV80 instructions involves soldering chips on to the board and the instructions are just a small resolution image.  I did not know the orientation of the TJA1050 so I used a multimeter and the data sheet of the chip to determine the correct orientation on the board via voltage and ground.  For the other small resistors I did not know the size and ordered them based on guess and parameters given.  They are 1.6mm in length.  I also had to add another CAN-H and CAN-L wire to my AT-200 plug.


Chips I used: 

771-TJA1050T/CM118 TJA1050T/CM,118, 594-MCT06030D2201BP1 MCT06030

D2201BP100, 80-C603C104K5RAC3121 C0603C104K5RAC3121


After adding the chips I had no issue reading ISN, writing ISN, and for me Backup and Writing of the DMEI plugged the DME in the car and started it right up without any other ISN changes to CAS or anything else.


At 200 Clone Msv80 Dme 01

At 200 Clone Msv80 Dme 02

At 200 Clone Msv80 Dme 03

At 200 Clone Msv80 Dme 04

At 200 Clone Msv80 Dme 05

At 200 Clone Msv80 Dme 06

Good to know:

  1. Please make the connections shown in the above image 4, because someone feedback he tried to identify the ecu he get the error: connection failed.


  1. You are at your own responsible for any risk when you make the connections by following the above images, because it is from one AT200 user @ wase17.


Alright, hope this article helps those in need and who are curious about this AT-200 ECU Programmer.




Other devices that will retrieve ISN code from MSV80 DME

Xhorse VVDI2


See: Read BMW MSV80 ISN with VVDI2 or CGDI Prog?

Yanhua Mini ACDP will read MSV80 on bench without soldering as well. Require ISN reading license and MSV80 interface board.

Yanhua Acdp Msv80 Isn 1 Yanhua Acdp Msv80 Isn 2 Yanhua Acdp Msv80 Isn 3 Yanhua Acdp Msv80 Isn 4