Fendt 1.2.D2 – A051 - ECU, engine control unit (EDC 7): EEPROM memory access error

The engine control unit is unable to properly read from or write to its internal EEPROM memory chip.

• 411 Vario COM III
• 412 Vario COM III
• 413 Vario COM III
• 414 Vario COM III
• 415 Vario COM III
• 712 Vario COM III
• 714 Vario COM III
• 716 Vario COM III
• 718 Vario COM III
• 818 Vario COM III
• 820 Vario COM III
• Fendt 309 Vario COM III
• Fendt 310 Vario COM III
• Fendt 311 Vario COM III
• Fendt 312 Vario COM III
• Fendt 411 Vario COM III
• Fendt 412 Vario COM III
• Fendt 415 Vario COM III
• Fendt 712 Vario COM III
• Fendt 714 Vario COM III
• Fendt 716 Vario COM III
• Fendt 718 Vario COM III
• Fendt 818 Vario COM III
• Fendt 820 Vario COM III
• Fendt 922 Vario COM III
• Fendt 924 Vario COM III
• Fendt 927 Vario COM III
• Fendt 930 Vario COM III
• Fendt 933 Vario COM III
• Fendt 936 Vario COM III

1. 1

   Connect the official Deutz/Fendt diagnostic software (SERDIA or FENDIAS) to the tractor's diagnostic port.

2. 2

   Attempt to delete the error (FC:008E) using the SERDIA tool.

3. 3

   Cycle the tractor's ignition and rescan the system. If the code clears and does not return, it may have been a transient memory glitch. If it is hard-set, it confirms a physical or software failure of the EEPROM.

1. 1

   Remove the ECU

   Disconnect the batteries and remove the A051 Engine Control Unit (EDC 7) from the machine.

2. 2

   Repair or Replace

   Send the ECU to a specialized agricultural electronics repair facility (such as Ilgenfritz Mechatronics) for a microcontroller/software repair, or replace it with a new unit.

3. 3

   EOL Programming

   If a new or remanufactured ECU is installed, you must perform EOL (End of Line) programming using FENDIAS/SERDIA. This step writes the correct engine data record to the new A051 ECU and synchronizes it with the A050 Basic Control Unit and A077 Immobilizer ECU.