ECUHELP KT200 Plus has been successfully confirmed to read and write the E39A MPCS5777 ECU, as well as perform DTC (Diagnostic Trouble Code) Off and IMMO (Immobilizer) Off functions.

Step-by-Step Procedure
Wiring Connection: Follow the wiring diagram carefully to connect the KT200 Plus to the E39A MPCS5777 ECU.
KT200 plus read and write E39A MPCS5777, DTC off, IMMO off-01 KT200 plus read and write E39A MPCS5777, DTC off, IMMO off-02

Reading Flash Data: Begin the process of reading the Flash data. Ensure the reading process reaches 100% completion without errors.
KT200 plus read and write E39A MPCS5777, DTC off, IMMO off-03

Loading EEPROM and Flash Files: Load the necessary EEPROM and Flash files into the KT200 Plus software.
KT200 plus read and write E39A MPCS5777, DTC off, IMMO off-04

DTC Code Management:
Navigate to the “DTC Code Management” section.
Select the codes to be disabled by ticking the relevant options.
Click “Save” to confirm the changes.
KT200 plus read and write E39A MPCS5777, DTC off, IMMO off-05

Writing EEPROM and Flash Data: Start writing the modified EEPROM and Flash data back to the ECU. Ensure the writing process completes successfully.
KT200 plus read and write E39A MPCS5777, DTC off, IMMO off-06

Conclusion
ECUHELP KT200 Plus is an effective ECU tool for programming the E39A MPCS5777 ECU, offering seamless read and write capabilities along with advanced functions such as DTC Off and IMMO Off. Its user-friendly interface and reliable performance make it a valuable asset for automotive professionals working on ECU modifications and diagnostics.