Fendt 18.1.66 – Autoguide / VarioGuide Steering System (A057 / A050): Y087 - Steering valve block, Autoguide (or VarioGuide) - Wire for flow measurement broken or short circuited.

It indicates an electrical fault—specifically an open circuit (broken wire) or a short circuit—in the flow measurement sensor circuit of the automated steering valve block.

• 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 series (COM III)
• Fendt 400 Vario series (COM III)
• Fendt 700 Vario series (COM III, SCR)
• Fendt 800 Vario series (COM III)
• Fendt 900 Vario series (COM III, SCR, S4)

1. 1

   Check the wiring of the position/flow sensor on the Y087 steering valve block for obvious breaks, chafing, or short circuits.

2. 2

   Check the electrical supply line to the steering valve to ensure it is receiving proper voltage.

3. 3

   Inspect the separation points/connectors on the Y087 valve (e.g., connectors X1588 and X1589) for corrosion, moisture, or bent pins.

1. 1

   Access the Valve

   The Y087 steering valve block is typically located on the right side of the transmission. To access it properly, you may need to remove the right rear wheel and the side panel.

2. 2

   Repair Wiring

   If a broken wire or short circuit is found in the flow measurement circuit during the diagnostic phase, repair the wiring harness or replace the damaged connector.

3. 3

   Replace Component

   If the wiring harness tests good, the internal position/flow sensor has failed. Depending on the exact valve revision, the sensor may not be serviceable separately, requiring the replacement of the Y087 steering valve block.

4. 4

   Calibration

   If the steering valve block is replaced, the new valve must be calibrated to the tractor. Enter the Fendt terminal and perform the steering valve calibration procedure using Calibration code "2403".