Fendt 9.1.56 – A002 ECU (Enhanced Control Unit / Comfort Control Module): Y019 - Spool valve fault — Magnet output stage fault within spool valve

This code indicates an internal electronic failure within the pilot control solenoid of the Y019 auxiliary control valve. The "magnet output stage" refers to the driver circuit/microchip inside the valve's electronic head that controls the solenoid coil. When this fault is triggered, the system forces the affected valve to move into the neutral position as a safety consequence, disabling its operation.

• 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
• 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
• Farmer 400 Vario series (409, 410, 411, 412)
• Favorit 700 Vario series (711, 712, 714, 716)
• Favorit 900 Vario series (916, 920, 924, 926, 930)
• Fendt 300, 400, 700, 800, and 900 Vario COM I, II, and III generations

1. 1

   Identify the Y019 valve on the central control block (usually Valve 5 / Front Power Lift).

2. 2

   Inspect the wiring harness and the specific connector (e.g., X330 for Y019) for corrosion, pushed pins, or wire chafing.

3. 3

   Check the G-bus CAN high (X641) and CAN low (X642) connectors to verify CAN Bus communication.

4. 4

   Ensure the valve is receiving proper stable supply voltage (between 8V and 18V). If voltage is stable but the fault persists, the internal output stage is confirmed dead.

1. 1

   Depressurize the System

   Turn off the tractor and actuate the hydraulic levers/terminal controls to relieve all hydraulic pressure from the system.

2. 2

   Access the Valve Block

   Remove the necessary access panels (usually on the right side of the tractor near the cab entrance step) to access the ZSB central control block.

3. 3

   Disconnect Electricals

   Unplug the CAN bus and power connectors from the Y019 valve.

4. 4

   Remove the Valve

   Unbolt the tie rods securing the valve stack. Carefully remove the faulty Y019 spool valve slice, ensuring no dirt enters the hydraulic system.

5. 5

   Install the New Valve

   Install the replacement valve (or replacement electronic head, if applicable) using new O-rings/seals between the sandwich plates. Torque the tie rods to the manufacturer's specification.

6. 6

   Bleed the System

   The control block segments must be completely filled with oil and bled according to Fendt's instructions before operation.

7. 7

   Calibrate (EOL Programming)

   Connect the FENDIAS diagnostic tool. The new valve must be recognized by the CAN bus and calibrated (Teach-in / EOL programming) to set the neutral, floating, and maximum deflection positions.