DSM 523534.10 — Hotkey for Selective Control Valves, Fault

DSM 523534.10 (DSM )

Code: 523534.10



This diagnostic trouble code is triggered if the hotkey for Selective Control Valves (SCVs) remains continuously actuated for more than 60 seconds during initialization (after the ignition has been switched on), or if the key is registered as “actuated” for more than 10 minutes during operation. SCVs are critical for controlling hydraulic flow to various implements attached to the tractor.


If the hotkey for SCVs remains actuated beyond the specified durations, the control unit may disable the functionality associated with SCVs to prevent unintentional or unsafe operations. This can affect the hydraulic control of implements, potentially disrupting normal field operations.


  • Inspect Hotkey Mechanism: Examine the physical condition of the SCV hotkey for signs of sticking, damage, or wear that could cause it to remain actuated.
  • Test Hotkey Functionality: Use diagnostic tools to verify the proper operation of the SCV hotkey. Ensure it accurately registers presses and releases.
  • Check Electrical Connections: Inspect the electrical connections to the SCV hotkey to ensure they are secure and free from corrosion or damage.
  • Update Control Software: Ensure that the control unit software is up-to-date, as updates may include fixes or improvements for hotkey management.
  • Replace Faulty Components: If the hotkey or its associated wiring and connectors are faulty, replace them with new or known-good parts.
  • Perform System Reset: After resolving the issue, reset the control unit to clear the fault code and verify normal hotkey operation through comprehensive testing.


Maintaining the proper functionality of the SCV hotkey is essential for effective hydraulic control of implements. Regular inspection and timely maintenance of the hotkey mechanisms can prevent faults and ensure reliable control inputs.

Control Units: John Deere

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