520285.11 – Armrest Hitch Controls Module Circuit Fault. John Deere AIC System Alert.

AIC 520285.11 (AIC )

Code: 520285.11



This diagnostic code, AIC 520285.11, indicates that the rear hitch lock button on the armrest hitch controls module has been held in a pressed condition for an extended period. This prolonged activation may signal a mechanical sticking, button failure, or a software issue that misinterprets the button’s state, potentially causing unintended operational behaviors or safety concerns.


To prevent any possible malfunction or unintended hitch movements, the control unit has disabled the function associated with this button.


  • Inspect the rear hitch lock button for mechanical sticking or damage. Check if the button is physically jammed or if there are any obstructions causing it to remain pressed.
  • Test the button’s functionality to ensure it springs back to its original position after being pressed. If the button fails to release correctly, it may need cleaning or lubrication, or potentially replacement if damaged.
  • Examine the wiring and connections of the button within the armrest hitch controls module for any signs of wear, corrosion, or damage that could affect signal transmission.
  • Consider recalibrating the software settings associated with the button to correct any errors in how button presses are interpreted by the system.
  • After addressing the issue, restore the function and perform a thorough test to ensure the rear hitch lock button is operating correctly and safely, without remaining stuck in a pressed state.


Ensuring that all control buttons function correctly and release properly after activation is critical for safe machinery operation. Regular checks and maintenance can prevent issues related to stuck buttons or faulty controls, maintaining operational efficiency and safety.