Fendt A.1.13 – Enhanced Control / Spool Valve Control Module: Y015 - Spool valve fault, valve 1 — Supply voltage > 18 volts

The electronic control system has detected an abnormally high supply voltage (exceeding 18 volts) at the first hydraulic spool valve (designated as component Y015). As a built-in safety consequence, the valve automatically moves into the neutral position and locks out further operation to prevent erratic hydraulic movements or damage to the valve's internal electronics.

• 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
• Fendt 200 Vario series
• Fendt 300 Vario series
• Fendt 400 Vario series
• Fendt 500 Vario series
• Fendt 700 Vario series
• Fendt 800 Vario series
• Fendt 900 Vario series

1. 1

   Test the overall tractor system voltage at the battery with the engine running to rule out an overcharging alternator.

2. 2

   Inspect the wiring harness leading to Spool Valve 1 (Y015) for chafing, melted insulation, or shorts to a higher voltage source.

3. 3

   Disconnect the harness at the spool valve and use a multimeter to measure the actual supply voltage arriving at the connector pins.

1. 1

   Verify alternator output

   Start the tractor and measure the voltage across the battery terminals. If it is >18V (overcharging cause), the alternator/voltage regulator is faulty and must be replaced.

2. 2

   Isolate the valve

   If the system voltage is normal (typically 12V–14.5V), turn off the tractor and disconnect the electrical connector at Spool Valve 1 (Y015).

3. 3

   Test the harness

   Turn the ignition to the ON position and measure the supply voltage at the harness connector.

4. 4

   Repair wiring

   If the harness shows >18V (wiring short cause), trace the wiring back to the control module to locate and repair the short to power.

5. 5

   Replace the spool valve

   If the harness shows normal voltage (approx. 12V) but the A.1.13 code remains active when plugged in (internal valve failure cause), the spool valve's internal circuit board/sensor has failed and is misreading the voltage.

6. 6

   Hydraulic depressurization

   Turn off the tractor and relieve all hydraulic system pressure.

7. 7

   Remove faulty valve

   Unbolt and remove the faulty Y015 spool valve from the hydraulic block.

8. 8

   Install new valve

   Install the replacement spool valve using new O-rings/seals. Torque the mounting bolts to OEM specifications.

9. 9

   Calibrate spool valve

   Reconnect the electrical harness, clear the fault codes, and perform a spool valve calibration via the tractor's terminal or FENDIAS diagnostic software to register the new valve on the CAN bus.