Fendt 18.1.32 – Overall System / Tractor ECU: Y087 - Steering valve block, Auto-Guide

The system has detected an anomaly with the position of the steering valve actuator within the Auto-Guide steering valve block (designated as component Y087). The actuator is either failing to reach its commanded position, failing to return to neutral, or the position sensor is sending an implausible signal.

• 922 Vario COM III
• 924 Vario COM III
• 927 Vario COM III
• 930 Vario COM III
• 933 Vario COM III
• 936 Vario COM III
• Fendt 300 Vario (COM III)
• Fendt 400 Vario (COM III)
• Fendt 700 Vario (COM III & SCR)
• Fendt 800 Vario (COM III & SCR)
• Fendt 900 Vario (COM III & SCR)

1. 1

   Inspect the electrical supply lines to the Y087 steering valve block for breaks, corrosion, or loose connections.

2. 2

   Check the wiring of the position sensor integrated into the steering valve for open circuits or short circuits.

3. 3

   Check for mechanical faults on the steering actuator itself. Ensure the actuator can physically reach the neutral position without binding.

4. 4

   Verify if the steering valve has lost its calibration data, which can trigger position warnings.

1. 1

   Repair Wiring

   If any breaks or shorts are found in the wiring harness leading to the Y087 valve block or its position sensor, repair or replace the damaged wiring sections.

2. 2

   Recalibrate the Steering Valve

   Enter the tractor's diagnostic/calibration menu and run Calibration Code 2403 (Auto-Guide control valve calibration). Follow the on-screen prompts to teach the valve its end stops and neutral position.

3. 3

   Replace Component

   If the calibration fails (e.g., the system reports the actuator cannot reach neutral) or if the position sensor is internally shorted/broken, the steering head or the complete Y087 steering valve block must be replaced.

4. 4

   Clear Faults

   Once the repair or calibration is complete, clear the fault codes from the tractor's memory.

5. 5

   Test Drive

   Perform a steering test via the Auto-Guide terminal and conduct a test drive to ensure the vehicle's correct operation and road safety.