Fendt F.1.B0 – A034 Joystick (Drive Switch): A034 - Joystick — Routing data GD false

This fault code indicates a CAN bus communication or data routing error originating from the A034 Joystick (Drive Switch). The system is receiving incorrect, corrupted, or implausible routing data ("GD false") from the joystick.

• 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
• 300 Vario (COM III)
• 400 Vario (COM III)
• 411
• 412
• 413
• 414
• 415
• 700 Vario (COM III)
• 711
• 712
• 714
• 716
• 718
• 800 Vario (COM III)
• 815
• 817
• 818
• 820
• 900 Vario (COM III)
• 916
• 920
• 924
• 926
• 930
• Favorit 700 series
• Favorit 900 series

1. 1

   Perform an ignition reset by turning the tractor OFF, waiting a few seconds, and turning it back ON to see if the fault clears (temporary data glitch).

2. 2

   Connect FENDIAS diagnostics and check live data for the A034 drive switch to verify if inputs are being registered.

3. 3

   Check the power supply for the CAN bus on circuit board A013, specifically verifying fuses F040, F041, and F047 (Joystick CAN fuse).

4. 4

   Inspect the wiring harness and CAN bus connectors at the base of the joystick for pinched wires, moisture ingress, or loose pins.

1. 1

   Connect diagnostics

   Connect the FENDIAS diagnostic laptop to the tractor.

2. 2

   Navigate to programming menu

   Navigate to the programming menu for the A034 Joystick.

3. 3

   Run EOL programming

   Run a new EOL (End-Of-Line) programming for the A034 joystick. This reflashes the routing data and re-establishes the correct CAN bus communication parameters.

4. 4

   Clear codes and test

   Clear the fault codes and test the joystick functions (drive directions, hydraulic valves).

5. 5

   Replace joystick

   If the EOL programming fails to complete, or if the F.1.B0 code immediately returns, the internal CAN circuit board inside the A034 Joystick has failed. The joystick must be replaced (or the internal board sent to an agricultural electronics specialist for repair).