Fendt A.1.62 – Steering Controller ECU / Auto-Guide System: Fault only possible in calibration mode

During the steering system calibration process, the system expected the steering to be moved to the left, but a steering movement to the right was detected instead. This indicates a mismatch between the expected physical movement and the signal being sent by the steering angle sensor.

• 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 400 Vario (COM III)
• Fendt 700 Vario (COM III)
• Fendt 800 Vario (COM III)
• Fendt 900 Vario (COM III)

1. 1

   Check the sideways freedom of movement of the front wheels to ensure there is no mechanical binding, heavy mud, or physical obstruction preventing the wheels from turning freely to the left.

2. 2

   Verify that the steering angle sensor on the front axle is securely mounted and that the linkage is not bent or installed backwards.

3. 3

   Ensure the sensor wiring harness is not pinched, damaged, or wired in reverse, which could cause the ECU to read a right turn when the wheels are turning left.

1. 1

   Park the tractor

   Safely park the tractor on a flat, level surface where the wheels have full freedom to turn lock-to-lock.

2. 2

   Inspect front axle and steering cylinders

   Inspect the front axle and steering cylinders for any mechanical restrictions. Clear any debris.

3. 3

   Repeat the calibration

   Initiate the steering calibration mode again.

4. 4

   Follow on-screen prompts

   Pay close attention to the on-screen prompts. When the system requests the steering to be moved to the left, ensure you are turning the wheel in the correct direction.

5. 5

   Replace steering angle sensor

   If the calibration fails again with the same code, the steering angle sensor is likely outputting an inverted or erratic signal and must be replaced.

6. 6

   Clear codes and recalibrate

   After replacing the sensor, clear the fault codes and perform the steering calibration procedure from the beginning.