Fendt A.1.DA – Tractor Management System (TMS) / General System ECU: B022 'Kickout' pressure-operated switch fault

The system has detected that the B022 pressure-operated switch is malfunctioning (e.g., the switch does not open or close when the required hydraulic pressure is reached). As a result, the hydraulic 'Kickout' function is not available.

• 409 Vario
• 410 Vario
• 411 Vario
• 412 Vario
• 711 Vario
• 712 Vario
• 714 Vario
• 715 Vario
• 716 Vario
• 717 Vario
• 718 Vario
• 916 Vario
• 920 Vario
• 924 Vario
• 926 Vario
• 930 Vario
• Fendt 300 Vario (COM III)
• Fendt Farmer 400 / 400 Vario (COM III)
• 409
• 410
• 411
• 412
• Fendt Favorit 700 / 700 Vario (COM III)
• 711
• 712
• 714
• 716
• Fendt 800 Vario (COM III)
• 815
• 817
• 818
• Fendt Favorit 900 / 900 Vario (COM III)
• 916
• 920
• 924
• 926
• 930

1. 1

   Locate the B022 sensor at the right entry on the left connection area at the SAE pump connection (behind the removable metal panel).

2. 2

   Check the electrical connector X171 for corrosion, moisture, or backed-out pins.

3. 3

   Perform a voltage test sequence on the signal line, checking for a 0 / 2.4V toggle to verify if the pressure-operated switch is physically opening and closing under pressure.

4. 4

   Trace the wiring back to the ECU using the 'Spool valves 1' circuit diagram to ensure there are no short circuits to ground or broken wires.

1. 1

   Preparation

   Park the tractor on a level surface, turn off the engine, relieve all hydraulic pressure, and disconnect the battery to prevent electrical shorts.

2. 2

   Access the Component

   Remove the metal access panel on the right entry/left connection area near the SAE hydraulic pump to expose the B022 switch.

3. 3

   Removal

   Disconnect the X171 electrical connector from the switch. Using the appropriate wrench, carefully unthread the faulty B022 pressure switch from the valve block. Have a rag ready to catch any residual hydraulic fluid.

4. 4

   Installation

   Install the new pressure switch (ensure any required O-rings or sealing washers are in place) and torque to OEM specifications. Reconnect the X171 electrical connector.

5. 5

   Testing

   Reconnect the battery, start the tractor, and operate the hydraulics to build pressure. Verify there are no leaks.

6. 6

   Clear Codes

   Use the tractor's terminal or the FENDIAS diagnostic tool to clear the A.1.DA fault code and verify that the 'Kickout' function has been restored.