Fendt A.1.27 – ELECTRICAL VALVES: Internal position sensor fault

Internal position sensor fault in Y016 - Auxiliary control valve (Valve 2). The valve automatically moves into the neutral position to prevent uncontrolled hydraulic functions.

• 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
• 409
• 410
• 411
• 412
• 413
• 414
• 415
• 711
• 712
• 714
• 716
• 718
• 724
• 815
• 817
• 818
• 820
• 822
• 824
• 916
• 920
• 922
• 924
• 926
• 927
• 930
• 933
• 936

1. 1

   Inspect the wiring harness and connector to the Y016 (Valve 2) auxiliary control valve for corrosion, moisture, or damaged pins.

2. 2

   Verify supply voltage to the valve to rule out voltage issues (related codes A.1.22 or A.1.23) causing erratic sensor readings.

3. 3

   Verify CAN bus communication to ensure the valve is properly registered on the network (related code A.1.30).

4. 4

   Check manual actuation of the valve for mechanical binding or oil contamination; the manual slider must not have play and must return to the middle position.

1. 1

   Depressurize the Hydraulic System

   Ensure the tractor is off, implements are lowered, and hydraulic pressure is relieved before servicing.

2. 2

   Remove the Valve Actuator/Head

   Disconnect the electrical harness from the Y016 valve. Unbolt the electronic spool valve head (actuator) from the hydraulic distributor block.

3. 3

   Replace the Component

   Depending on the specific valve revision on your tractor, you will need to replace either the electronic spool valve head or the entire spool valve assembly.

4. 4

   Clear Fault Codes

   Turn the ignition on. Use the Variotronic Ti terminal to navigate to the fault code menu. Confirm and delete the stored fault codes. Note: Canceling a fault message on the main screen only hides it; it must be deleted from the memory module to clear the system.

5. 5

   Calibrate/Test

   Start the tractor and test the auxiliary valve operation (both manual and electronic actuation) to ensure the valve returns to neutral and no codes return.