AIC 520286.02 – Armrest Hitch Controls Module Circuit Fault. John Deere AIC System Alert.

AIC 520286.02 (AIC )

Code: 520286.02



This error code, AIC 520286.02, is generated when the set rear hitch lower setpoint button on the armrest hitch controls module malfunctions. The fault prevents the button from performing its intended function, which could be due to an electrical issue, a mechanical failure, or software problems affecting the button’s operation. A temporary system recovery can be attempted by moving the quick raise/lower switch to the center position.


To prevent unintended operations and potential damage, the functionality associated with the set rear hitch lower setpoint button has been disabled.


  • Begin by attempting to reset the system as suggested: move the quick raise/lower switch to the center position and observe if this action restores functionality.
  • Inspect the malfunctioning button for physical damage or signs of wear that might impede its function. Check if the button is stuck, unresponsive, or if there are any visible obstructions.
  • Test the electrical continuity and signal transmission of the button using diagnostic tools to ensure that it is receiving and sending signals appropriately.
  • Examine all related wiring and connections for corrosion, looseness, or damage that could affect the button’s operation.
  • If the problem persists, recalibrate or replace the faulty button or related components. Ensure that all repairs or replacements are done in accordance with manufacturer specifications.
  • After making necessary repairs, thoroughly test the armrest hitch controls module to confirm that the issue has been resolved and that all functions are operational without restrictions.


Regular inspection and maintenance of the control modules are crucial to ensure the reliable and safe operation of the machinery. Addressing faults promptly helps avoid operational downtime and maintains the effectiveness of critical machinery functions.