DSM 523531.10 — Hotkey for HMS, Fault

DSM 523531.10 (DSM )

Code: 523531.10



This diagnostic trouble code is triggered if the key for Headland Management System (HMS) 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. The HMS is crucial for automating sequences of actions at the end of a field, improving operational efficiency.


If the HMS hotkey remains actuated beyond the specified durations, the control unit may disable the functionality associated with the HMS to prevent unintentional or unsafe operations, potentially affecting automated task sequences.


  • Inspect Hotkey Mechanism: Examine the physical condition of the HMS hotkey for signs of sticking, damage, or wear that could cause it to remain actuated.
  • Test Hotkey Functionality: Utilize diagnostic tools to verify the proper operation of the HMS hotkey. Ensure it is accurately registering presses and releases.
  • Check Electrical Connections: Inspect the electrical connections to the HMS hotkey to ensure they are secure and free from corrosion or damage.
  • Update Control Software: Confirm 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 HMS hotkey is essential for the efficient management of field operations. Regular inspection and timely maintenance of the hotkey mechanisms can prevent faults and ensure reliable control inputs.

Control Units: John Deere

John Deere Parts
John Deere Logo