Fendt A.1.20 – Enhanced Control Module (A002): Y016 - Auxiliary control valve (Spool valve fault, valve 2)

Valve 2 (component Y016) cannot be recognized by the valve bus. The system disables the valve, resulting in 'No valve operation available' for that specific hydraulic circuit.

• 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 900 Vario Series (916, 920, 924, 926, 930)
• Fendt 700 Vario Series
• Fendt 800 Vario Series
• Fendt 300 and 400 Vario (COM III) Series
• Favorit 700 and 900 Series

1. 1

   Check the CAN Bus lines (CAN II, pins 4 and 5) in the wiring harness between the A002 module and the Y016 valve for breaks or shorts

2. 2

   Inspect the electrical connector on the Y016 spool valve for corrosion, pushed-out pins, or moisture ingress

3. 3

   Verify the valve is receiving proper supply voltage and ground

4. 4

   Perform a swap test by temporarily connecting the harness to an adjacent valve (e.g., Valve 1 or Valve 3) to determine if the fault follows the valve or remains with the wiring

1. 1

   Repair Wiring

   If the diagnostic checks reveal a break or short in the CAN II lines (pins 4 and 5) between the A002 controller and the Y016 valve, repair the wiring harness.

2. 2

   Replace the Valve

   If the wiring and CAN signals are intact but the valve still fails to communicate, the internal electronics of the Y016 spool valve have failed. The valve must be replaced.

3. 3

   System Bleeding

   After replacing the hydraulic valve, ensure the hydraulic system is topped up and bled according to the operator's manual.

4. 4

   Clear Codes and Calibrate

   Connect the FENDIAS diagnostic tool (or equivalent TEXA/multi-brand tool) to clear the stored A.1.20 fault code. You may need to perform an EOL (End of Line) programming or valve calibration procedure so the A002 module recognizes the new valve on the bus.