Fendt 9.1.5F – A002 - ECU, enhanced control: Spool valve fault (Y019 - Auxiliary control valve 5)

The system detects that the setpoint message or configuration message is missing or not plausible. This indicates incorrect messages are being sent on the CAN bus, a potentiometer/PWM fault, or that the electronics inside the valve itself are faulty.

• 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
• Fendt Farmer 400 series
• Fendt Favorit 700 series
• Fendt Favorit 900 series
• Fendt 700 Vario
• Fendt 800 Vario
• Fendt 900 Vario
• 916 Vario
• 920 Vario
• 924 Vario
• 926 Vario
• 930 Vario

1. 1

   Verify the supply voltage to the Y019 valve (should be between 8V and 18V to ensure stable CAN behavior)

2. 2

   Inspect the G-bus CAN lines communicating with the valve, specifically connectors X641 (CAN high) and X642 (CAN low)

3. 3

   Check connector X330 (the DIN connector for Valve 5) for corrosion, pushed pins, or moisture

1. 1

   Access the Valve Block

   The Y019 valve is located on the right side of the tractor in the region of the ZSB (central control block).

2. 2

   Remove Covers

   Depending on the exact model, access the valve block by removing the flap on the right side of the tractor, or by removing the footplate at the cab's right entrance step.

3. 3

   Depressurize the System

   Ensure the tractor is off and hydraulic pressure is relieved before servicing the spool valve.

4. 4

   Disconnect Electronics

   Unplug the X330 DIN connector and the CAN bus connectors (X641/X642) from the Y019 valve.

5. 5

   Remove and Replace

   Unbolt the faulty Y019 auxiliary control valve from the central control block and install the replacement unit.

6. 6

   Reassemble and Calibrate

   Reconnect all hydraulic lines and electrical connectors. Clear the fault codes via the Vario terminal or FENDIAS diagnostic tool. A teach-in or EOL (End of Line) reprogramming may be necessary for the A002 ECU to recognize the new valve's potentiometer limits.