PTI 523911.05 – Hydro Ring Unit (RU) Control Solenoid Circuit Fault

PTI 523911.05 (PTI )

Code: 523911.05



This error code is triggered when a fault is detected in the Hydro Ring Unit (RU) control solenoid circuit.


The control unit commands the equipment to enter Park mode, which is recoverable upon power-up.


  • Inspect Solenoid Circuit:
    • Check the RU control solenoid circuit for any signs of damage, loose connections, or corrosion.
    • Repair or replace any damaged components.
  • Test Solenoid Function:
    • Test the RU control solenoid to ensure it is operating correctly.
    • Replace the solenoid if it is found to be faulty.
  • Verify Electrical Connections:
    • Ensure all electrical connections related to the RU control solenoid are secure and free of corrosion.


Maintaining the integrity of the solenoid circuit is essential for the proper function of the Hydro Ring Unit and overall equipment performance.

Control Units: John Deere

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