How to Read/Write Delphi ECU DCM3.5 (CRD2.2) by Boot Mode with CG FC200 Programmer?

A 2012 Jeep Compass 2.2 diesel ECU with DCM 3.5. Actually it’s from Mercedes company 2.2 diesel, similar with CRD2. It’s 136 horsepower. It can’t be read via OBD or on bench, but it can be read/write with V1.1.6.0 CG FC200 ECU Programmer in boot mode.

how to read write delphi ecu dcm3.5 1

Connect FC200 to a PC and run software
Select Mercedes>> DELPHI CRD2.X MPC556X>> Boot

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Check the wiring diagram
Open ECU shell, and then connect FC200 to ECU according to the wiring diagram

how to read write delphi ecu dcm3.5 3

Held the brown cable to GPT-0 point in boot mode

how to read write delphi ecu dcm3.5 4

Start to perform the related operation
Connect ECU successfully

how to read write delphi ecu dcm3.5 5

Read and back up the original PFlash and ExtEEPROM in sequence

how to read write delphi ecu dcm3.5 6 how to read write delphi ecu dcm3.5 7

After that, load file to write only the difference between the original and what I modified
Write data successfully.

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