Fendt 1.1.05 – EDC / EMR control unit: Engine configuration could not be read from the EDC / EMR - control unit

The tractor's main management system is unable to retrieve the necessary engine parameters or checksum data from the electrical engine control module. As a direct consequence of this missing configuration data, the Tractor Management System (TMS) is disengaged or rendered not operational.

• 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
• all Vario tractors
• 300 Vario series (COM III)
• 400 Vario series (COM III)
• 700 Vario series (COM III)
• 800 Vario series (COM III)
• 900 Vario series (COM III)
• Farmer 400
• Favorit 700
• Favorit 900

1. 1

   Check CAN Bus Communication: Verify the communication lines between the tractor's main control unit and the EDC/EMR engine control module. Look for concurrent bus faults (such as code 0.0.11) which indicate a physical wiring or connector issue.

2. 2

   Inspect Wiring and Connectors: Check the 'EDC Engine control' and 'EMR Engine control' circuit diagrams. Inspect the wiring harness and connectors at the EDC (A021) / EMR (A022) control module for line discontinuities, corrosion, or loose pins.

3. 3

   Check Power Supply: Verify the voltage supply to the EDC/EMR control unit to ensure it is powering up correctly.

4. 4

   Diagnostic Tool Connection: Connect the FENDIAS diagnostic tool to see if the ECU can be communicated with or if it has suffered an internal processing error.

1. 1

   Connect Diagnostic Equipment

   Hook up the FENDIAS diagnostic system to the tractor.

2. 2

   Repair Wiring (if applicable)

   If diagnostic checks revealed a line discontinuity or damaged connector at the EDC/EMR module, repair the wiring harness to restore communication.

3. 3

   Perform EOL Reprogramming

   If the wiring is intact but the configuration is missing, corrupted, or has a checksum error, the official Fendt remedy is to perform an EOL (End-of-Line) reprogramming of the EDC/EMR control unit to reload the engine configuration data.

4. 4

   Replace the ECU

   If EOL programming fails, or if the ECU has an internal hardware failure and cannot accept the new data record, the EDC/EMR control module must be replaced.

5. 5

   Clear Codes and Test

   After reprogramming or replacement, clear the fault codes and verify that the Tractor Management System (TMS) successfully re-engages.