Fendt A.1.26 – Enhanced Control ECU (A002): Spool valve fault, valve 2 — Magnet output stage fault within spool valve

This fault indicates an internal electrical failure within the solenoid (magnet) output stage of auxiliary hydraulic spool valve 2 (Y016). As a built-in safety consequence, the system automatically forces the valve into the neutral position, and manual/electronic actuation is disabled.

• 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
• Farmer 400 series
• Favorit 700 and Favorit 900 series
• 300, 400, 700, 800, and 900 Vario (COM III) series

1. 1

   Inspect the wiring harness and the connector (X327) going to Valve 2 (Y016 - typically color-coded blue) for corrosion, moisture, or damaged pins.

2. 2

   Verify that the valve is receiving proper operating voltage (voltage drops below 8V or spikes above 45V can cause valve dropouts).

3. 3

   Ensure CAN II communication is intact (Pins 4 and 5). If the bus line is damaged, the valve cannot be identified by the ECU.

4. 4

   If wiring, voltage, and CAN communication check out perfectly, the internal circuit of Y016 has failed and the valve must be replaced.

1. 1

   Preparation

   Park the tractor on a level surface, turn off the engine, and actuate the hydraulic levers/terminal to relieve all residual hydraulic pressure in the system.

2. 2

   Locate the Valve

   Locate Spool Valve 2 (Y016) in the rear hydraulic valve stack. It is typically associated with the blue color-coded remotes.

3. 3

   Removal

   Disconnect the electrical connector (X327). Thoroughly clean the area around the valve stack to prevent dirt from entering the hydraulic system. Unbolt the tie-rods or mounting bolts securing Valve 2 to the hydraulic block.

4. 4

   Installation

   Install the new spool valve, ensuring all O-rings and mating surfaces are perfectly clean and properly seated. Torque the mounting bolts to OEM specifications.

5. 5

   Reconnection

   Reconnect the electrical harness.

6. 6

   EOL Programming

   Program the new auxiliary control valve for its specific position (Position 2) using the FENDIAS diagnostic tool / EOL (End of Line) program. The tractor will not recognize the new valve until it is assigned to position 2 on the CAN bus.

7. 7

   Testing

   Clear the stored fault codes. Start the tractor, allow the hydraulic oil to warm up, and test the operation of Valve 2 to ensure smooth function and no leaks.