Fendt 6.1.E1 – A002 - ECU, enhanced control: Checksum error PTO parametrisation

An internal memory error where the EEPROM checksum for the Power Take-Off (PTO) parameters does not match the expected value. The control unit has detected that the configuration data governing the PTO operation is corrupted, missing, or invalid.

• 409 Vario
• 410 Vario
• 411 Vario
• 412 Vario
• 711 Vario
• 712 Vario
• 714 Vario
• 715 Vario
• 716 Vario
• 717 Vario
• 718 Vario
• 916 Vario
• 920 Vario
• 924 Vario
• 926 Vario
• 930 Vario
• 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
• Farmer 400
• 400 Vario (COM III)
• Favorit 700
• 700 Vario (COM III)
• Favorit 900
• 900 Vario (COM III)
• 300 Vario (COM III)
• 800 Vario (COM III)

1. 1

   Verify symptoms: Check for restricted PTO operation or the PTO disengaging unexpectedly.

2. 2

   Check power and communication: Ensure the A002 ECU is receiving clean power and has a stable CAN bus connection. Check the voltage supply to the CAN-Bus on the A013 fuse board (specifically fuses F040 and F041).

3. 3

   Inspect wiring: Verify that there are no underlying wiring faults or short circuits causing communication drops between the A002 ECU and the A004 control console.

1. 1

   Connect diagnostic tool

   Connect the tractor to the FENDIAS diagnostic tool (Fendt EST).

2. 2

   Navigate to programming menu

   Navigate to the A002 ECU programming menu.

3. 3

   Run EOL programming

   Run new EOL programming (End-Of-Line programming) to reload the correct PTO parameters and data records into the module.

4. 4

   Clear codes and test

   Clear the fault codes and test the front and rear PTO engagement to ensure the checksum error does not return.

5. 5

   Repair or replace ECU

   If the EOL programming fails to write to the ECU or the code immediately returns, the EEPROM chip inside the A002 E-Box has likely suffered a hardware failure. The E-Box will need to be removed and either sent to an agricultural electronics specialist for board-level repair or replaced entirely.