Fendt 09.1.41 – Basic Control Unit (EXT) or Multifunction Armrest (MFA): S022 - Switch (external), lower front power lift

Signal fault originating from the external pushbutton used to lower the front linkage. The system detects that the button is faulty, experiencing a signal line error, or suffering from 'double actuation' (physically stuck). The button is disabled until the next trouble-free cold start, and the associated hydraulic valve is forced into a neutral position.

• 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
• 500 Vario series
• 700 Vario series
• 800 Vario series
• 900 Vario series

1. 1

   Visually inspect the S022 external switch at the front of the tractor for physical damage, heavy dirt/mud ingress, or a jammed button mechanism.

2. 2

   Perform a cold start reset by turning the tractor off completely to see if the fault clears or immediately returns.

3. 3

   Disconnect the switch and inspect the wiring harness and connector for corrosion, moisture, or broken wires, and verify the 8.5V supply voltage.

4. 4

   Test the switch with a multimeter for continuity to confirm if it is internally shorted (stuck closed) or failing to close the circuit when pressed.

1. 1

   Turn off the tractor ignition and remove the key to de-energize the control circuits.

2. 2

   Access the external front power lift switch panel at the front of the tractor.

3. 3

   Disconnect the electrical harness connector from the S022 'Lower' switch.

4. 4

   Clean the harness connector thoroughly.

   Apply a small amount of dielectric grease to the pins to prevent future moisture corrosion.

5. 5

   If the switch failed the continuity test or is physically stuck, unclip or unscrew the faulty S022 switch from the mounting housing.

6. 6

   Install the new OEM replacement switch and securely reconnect the wiring harness.

7. 7

   Turn the ignition key on and perform a cold start to reset the system lockout.

8. 8

   Access the tractor's Varioterminal.

   Navigate to the fault code menu to confirm, call up, and delete the stored 09.1.41 fault code.

9. 9

   Test the external lower front power lift button to ensure the linkage lowers smoothly and the code does not return.