Fendt 0A.1.BC – MFA (Multifunction Armrest): Linear module 4 (rocker switch) is not calibrated

The system has lost the calibration values for the 4th linear module (rocker) on the multifunction armrest. The associated valve position stops functioning, and the system locks the valve for safety. The system will prompt for Calibration Code "1006".

• 922 Vario COM III
• 924 Vario COM III
• 927 Vario COM III
• 930 Vario COM III
• 933 Vario COM III
• 936 Vario COM III
• Fendt 200 Vario (V, F, P series)
• Fendt 300, 400, 500 Vario (COM III / S4)
• Fendt 700 and 800 Vario (COM III / SCR / S4)
• Fendt 900 Vario (COM III / SCR) 919
• Fendt 900 Vario (COM III / SCR) 922
• Fendt 900 Vario (COM III / SCR) 924
• Fendt 900 Vario (COM III / SCR) 925
• Fendt 900 Vario (COM III / SCR) 927
• Fendt 900 Vario (COM III / SCR) 930
• Fendt 900 Vario (COM III / SCR) 933
• Fendt 900 Vario (COM III / SCR) 936

1. 1

   Check Preliminary Conditions (F01): Ensure the tractor is running, hydraulic oil is at operating temperature, and the system is ready for calibration.

2. 2

   Check MFA Communication (F03): Verify that the MFA is responding to the Basic Control Unit. If it is not responding, check the wiring harness and CAN bus connections to the armrest.

3. 3

   Check for Hardware Failure (0A.1.BD): If the linear module is physically broken, the system will often log the accompanying fault code 0A.1.BD ("Faulty linear module 4 (rocker) / lock valve").

4. 4

   Monitor Calibration Time (F08): If the calibration takes longer than 30 seconds, the module is likely sticking or failing to send a stable signal.

1. 1

   Access diagnostics and calibration menu

   Turn on the tractor and access the terminal's diagnostics and calibration menu.

2. 2

   Enter Calibration Code 1006

   Enter Calibration Code 1006 (Calibration, linear module 4 / control valve).

3. 3

   Actuate the rocker switch

   Follow the on-screen prompts on the terminal to actuate the rocker switch through its full range of motion. This teaches the ECU the neutral position and the end stops of the linear module.

4. 4

   Save the calibrated values

   Save the calibrated values. (Note: If the terminal displays fault F02, the calibrated values are faulty, indicating the potentiometer inside the rocker is worn out and the module must be replaced).

5. 5

   Clear fault code 0A.1.BC

   Once calibration is successfully completed, navigate to the fault code menu and manually clear code 0A.1.BC. (Fault codes must be cleared individually; they do not disappear automatically just because the fault is fixed).

6. 6

   Replace module or armrest if calibration fails

   If calibration repeatedly fails or code 0A.1.BD is present, replace the linear module or the multifunction armrest assembly.