Fendt A.1.10 – Main Tractor ECU (A002 - ECU, enhanced control): Spool valve fault, valve 1

The valve is not registered on the CAN bus (or cannot be recognized by the valve bus). Because the tractor's computer cannot communicate with the electronic module on the valve, valve actuation is not possible, and the valve defaults to a locked or neutral position.

• 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
• Farmer 400 Vario Series: 410
• Farmer 400 Vario Series: 411
• Farmer 400 Vario Series: 412
• Favorit 700 / 700 Vario Series: 711
• Favorit 700 / 700 Vario Series: 712
• Favorit 700 / 700 Vario Series: 714
• Favorit 700 / 700 Vario Series: 716
• 800 Vario Series: 815
• 800 Vario Series: 817
• 800 Vario Series: 818
• Favorit 900 / 900 Vario Series: 916
• Favorit 900 / 900 Vario Series: 920
• Favorit 900 / 900 Vario Series: 924
• Favorit 900 / 900 Vario Series: 926
• Favorit 900 / 900 Vario Series: 930

1. 1

   Check CAN Bus Power Supply: Inspect fuses F040 and F041 on printed circuit board A013. If blown, the valve will drop off the network.

2. 2

   Inspect the Valve Connector: Check the X326 electrical connector (pins 24, 26) on the Y015 (yellow) valve for corrosion, moisture, or backed-out pins.

3. 3

   Test the CAN Lines: Check continuity of the CAN bus wiring between the ECU and the valve (A002 CAN II, pins 4 and 5).

4. 4

   Software Verification: Verify via FENDIAS diagnostic software that the valve has not lost its End-of-Line (EOL) programming for Position 1.

1. 1

   Preparation

   Turn off the tractor, relieve all hydraulic system pressure, and disconnect the battery.

2. 2

   Disconnect

   Unplug the X326 electrical connector from the Y015 (yellow) valve slice. Disconnect the associated hydraulic lines, capping them to prevent contamination.

3. 3

   Removal

   Remove the tie-rod bolts holding the valve stack together and carefully extract the Y015 valve slice.

4. 4

   Installation

   Install the new Y015 valve slice. Crucial: You must use new O-rings between the valve slices to prevent internal/external hydraulic leaks. Torque the tie-rod bolts to the manufacturer's specification.

5. 5

   Reassembly

   Reconnect the hydraulic lines and the X326 electrical connector.

6. 6

   Calibration/Programming

   Connect the FENDIAS diagnostic tool and use the EOL (End of Line) program to assign the new valve to Position 1.

7. 7

   Testing

   Clear the A.1.10 fault code and test the yellow remote for proper operation.