Fendt A.1.52 – OVERALL SYSTEM/TRACTOR / A004 (ECU, control panel): B094 - Sensor, steering angle (4WD differential lock)

Invalid calibration values for steering angle sensor in EEPROM. The tractor's computer has lost the correct calibration data for the steering angle sensor, or the stored values have drifted outside of the acceptable operational range, causing the automatic 4WD and differential lock systems to become inoperable.

• 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
• 820 Vario greentec
• Farmer 400 series (409, 410, 411, 412)
• Farmer 300 series
• Favorit 500 series
• Favorit 700 series (711, 712, 714, 716)

1. 1

   Verify A.1.52 is the active code on the tractor's terminal (cancelling the message only hides it).

2. 2

   Visually inspect the B094 steering angle sensor on the front axle and its wiring harness for physical damage, corrosion, or severed wires.

3. 3

   Check for accompanying codes (e.g., A.1.51, 5.1.34, 5.1.35) that indicate a hard failure of the sensor or steering valve rather than a calibration issue.

1. 1

   Attempt Recalibration

   Access the tractor's calibration menu via the terminal.

2. 2

   Run Calibration Code 2401

   Enter calibration code '2401', which is the specific Fendt OEM calibration code for the 4WD differential lock steering angle sensor.

3. 3

   Safety Warning

   During the steering angle sensor and steering valve calibration, the front wheels may deflect automatically. Ensure the area around the front wheels is completely clear to prevent injury or material damage.

4. 4

   Replace if Calibration Fails

   If the calibration procedure fails to write valid data to the EEPROM, or if the values immediately drift out of range again, the B094 sensor is internally faulty and must be replaced.

5. 5

   Install New Sensor

   Remove the old sensor from the front axle and install the replacement. Ensure the connector is clean and seated properly.

6. 6

   Final Calibration

   After installing the new sensor, you must repeat the '2401' calibration procedure to write the new sensor's baseline values into the tractor's EEPROM.