Fendt 8.1.43 – A004 - ECU, Control Panel: Automatic function (switching from control console to joystick)

The system has detected a fault in switch/A004 contact or a faulty button. Switching between the control console and the joystick is not possible, which directly affects the Electrohydraulic power lift control (Rear EPC) circuit.

• 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
• Fendt Farmer 400
• Fendt Favorit 700 series
• Fendt Favorit 900 series
• Fendt 300 Vario (COM III)
• Fendt 400 Vario (COM III)
• Fendt 700 Vario (COM III)
• Fendt 800 Vario (COM III)
• Fendt 900 Vario (COM III) (e.g., 916, 920, 924, 926, 930)

1. 1

   Inspect the automatic function button/switch on the A004 control console for sticking, mechanical failure, or debris

2. 2

   Check for CAN (K-bus) communication faults between the A004 (Control Console) and A005 (E-box lifting gear control / Rear EPC)

3. 3

   Check the voltage supply for the CAN Bus on the A013 fuse board, specifically inspecting fuses F040 and F041

4. 4

   Test the electrical contacts directly behind the switch on the A004 panel for continuity

1. 1

   Power Down

   Turn off the tractor and disconnect the battery main switch to prevent electrical shorts while working on the console.

2. 2

   Access the Console

   Carefully remove the trim and access the A004 Control Console assembly.

3. 3

   Test/Replace the Switch

   Test the specific automatic function switch. If the contact is faulty, replace the individual switch (if serviceable on your specific model year) or replace the affected A004 control console keypad/module.

4. 4

   Inspect Wiring

   Clean the harness connectors linking the A004 console to the tractor's main harness and ensure the pins are not bent or corroded.

5. 5

   Reassemble and Power Up

   Reconnect the console and restore battery power.

6. 6

   Clear Codes

   Use the tractor's Vario Terminal or the FENDIAS diagnostic system to acknowledge and clear the stored 8.1.43 fault code.

7. 7

   Operational Test

   Test the electrohydraulic power lift control by attempting to switch the automatic function from the control console to the joystick to ensure the repair was successful.