Fendt 03.1.50 – A039 - MFA (Multifunction Armrest): A039 - MFA, multifunction armrest: Invalid parameters for FRONT power lift module

The system has lost or received invalid calibration parameters for the front hitch (Front EPC - Electronic Power Control). As a safety consequence, the tractor ignores the corrupted data and defaults to using predefined, restricted values for the front power lift.

• 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 300 Vario (COM III)
• Fendt 400 Vario (COM III)
• Fendt 700 Vario (COM III)
• Fendt 800 Vario (COM III)
• Fendt 900 Vario (COM III)
• 916
• 920
• 922
• 924
• 927
• 930
• 933
• 936

1. 1

   Check for related fault codes (such as 09.1.B2 or 09.1.B3) which indicate a physical hardware failure rather than just lost memory

2. 2

   Inspect the wiring harness and connectors between the A039 Multifunction Armrest, the A004 depth control setpoint potentiometer, and the front power lift position sensor

3. 3

   Test MFA communication on the CAN bus to ensure there are no intermittent dropouts

1. 1

   Access diagnostic menu

   Turn on the tractor and access the diagnostic/calibration menu via the Vario terminal.

2. 2

   Input calibration code

   Navigate to the calibration section and input Calibration code "9001" (Front EPC calibration).

3. 3

   Calibrate sensors

   Follow the on-screen prompts to calibrate the front power lift position sensor and the setpoint potentiometer.

4. 4

   Save and cycle key

   Save the calibration and cycle the tractor's key (Key OFF, wait 10 seconds, Key ON).

5. 5

   Test front power lift

   Test the front power lift. If the calibration fails to save or the 03.1.50 code returns immediately, the internal memory of the A039 Multifunction Armrest may have failed, or the A004 potentiometer is physically defective and requires replacement.