Fendt 0.0.18 – Tractor / General System: Rear EPC (Electrohydraulic Power Control) Bus fault

A loss of communication or a voltage supply failure on the CAN bus network that controls the rear electrohydraulic power lift and spool valves, causing the tractor to enter a state with no functions available, no display for the rear EPC system, and locked controls.

• 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
• 413 Vario
• 414 Vario
• 415 Vario
• 724 Vario
• 815 Vario
• 817 Vario
• 818 Vario
• 820 Vario
• Vario 300 series

1. 1

   Check the power supply for a loss of voltage to the CAN bus

2. 2

   Inspect the A013 printed circuit board (microfuse board)

3. 3

   Test microfuses F040 and F041 on the A013 circuit board for a blown fuse

4. 4

   Verify the Fendt ECU is securely connected and the CAN connection to the transmission bus is not interrupted

5. 5

   Check the wiring diagram (Sheet 22 / 6) for the A014 ECU/EPC OBE to ensure there are no broken wires or corroded pins

1. 1

   Power Down

   Turn off the tractor and disconnect the battery to ensure safety while working on the electrical system.

2. 2

   Access the Fuse Board

   Open the electrical panel to access the A013 printed circuit board.

3. 3

   Replace Fuses

   If fuses F040 or F041 are blown, replace them with new fuses of the exact same amperage.

4. 4

   Inspect the Harness

   If the fuses are intact, trace the CAN bus wiring harness between the A013 circuit board and the A014/A005 Rear EPC ECU. Repair any damaged wiring.

5. 5

   Replace the ECU (if necessary)

   If the wiring and power supply are verified as good, the A014 (ECU, EPC OBE) or A005 module itself may have failed internally and will need to be replaced.

6. 6

   Clear Codes and Calibrate

   After repairs, reconnect the battery. Use the FENDIAS diagnostic tool or the tractor's terminal to confirm and delete the fault code from the memory. If the EPC module was replaced, an EOL (End of Line) programming or calibration of the rear EPC (Calibration code 8001 and 8002) may be required.