Fendt 04.1.EE – A050 Basic Control Unit ECU: A050 - ECU, basic control unit Transmission characteristic

The transmission ratio characteristic has lost its calibration, or the stored values have drifted and changed outside of acceptable parameters.

• 309 Vario COM III
• 310 Vario COM III
• 311 Vario COM III
• 312 Vario COM III
• 922 Vario COM III
• 924 Vario COM III
• 927 Vario COM III
• 930 Vario COM III
• 933 Vario COM III
• 936 Vario COM III
• 300 Vario series
• 400 Vario series
• 700 Vario series
• 800 Vario series
• 900 Vario series

1. 1

   Check for other faults: Ensure there are no other active transmission error codes displayed on the instrument panel. If other faults are present, they must be repaired first.

2. 2

   Warm up the transmission: Heat the transmission oil to a working temperature of approximately 40°C (35 to 45°C) to ensure consistent and repeatable calibration.

3. 3

   Secure the tractor: Park the tractor on a hard, level surface and apply the hand brake.

4. 4

   Immobilize: The tractor must be completely stationary (speed below 0.01 km/h).

5. 5

   Engine status: The engine must be started and running.

1. 1

   Prepare tractor

   Prepare the tractor according to the diagnostic checks listed above.

2. 2

   Enter calibration code

   Access the tractor's diagnostic/calibration menu and enter Calibration Code "4007" (Transmission ratio characteristic).

3. 3

   Execute calibration

   Follow the on-screen prompts to execute the calibration.

4. 4

   Verify success

   If the calibration completes successfully, the display will show "OK", indicating that the new sensor settings have been stored.

5. 5

   Finalize data

   To finalize and accept the data, turn the ignition key to position "0" (OFF).

6. 6

   Wait

   Wait for at least 15 seconds before switching the ignition back on.

7. 7

   Troubleshoot error

   If the display shows "ERROR", it means the preparatory conditions were not met or incorrect values were detected. If the error persists despite correct conditions, it may indicate a hardware failure in the transmission sensors, wiring, or the A050 ECU itself.