Fendt A.1.B2 – Enhanced Control ECU (A002): A034 (or A003) - Driving switch, CAN bus; Crossgate lever

Y-axis signal fault indicating interference, loss of signal, or out-of-range value on the Y-axis of the crossgate lever, preventing operation of hydraulic spool valves.

• 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 300 Vario (COM III)
• Fendt 400 Vario (COM III)
• Fendt 700 Vario (COM III) / Favorit 700
• Fendt 800 Vario (COM III)
• Fendt 900 Vario (COM III) / Favorit 900

1. 1

   Verify the 8.5V power supply to the joystick and check the CAN bus power supply fuses on circuit board A013 (F040, F041, and F047).

2. 2

   Inspect the wiring harness and connectors between the A034 crossgate lever and the A002 Enhanced Control ECU for shorts, corrosion, or breaks.

3. 3

   Use the Variotronic Ti terminal (Diagnostics Menu 1) or FENDIAS to monitor the joystick's live data, checking if the IDEAL value registers Y-axis movement.

1. 1

   Resolve Wiring Issues

   If a wiring fault is found between the joystick and the ECU, repair the damaged wires or replace the harness section. Clear the codes and retest.

2. 2

   Replace the Crossgate Lever

   If the wiring and power supply are intact but the Y-axis signal remains faulty (or if the terminal shows no IDEAL value changes on the Y-axis), replace the A034 crossgate lever.

3. 3

   EOL Programming

   Perform End of Line (EOL) programming for the newly installed crossgate lever.

4. 4

   Calibrate the Lever

   Calibrate the new crossgate lever to the system using calibration code 1001 so the ECU learns its exact zero/rest positions.