AIC 521480.02 – Rear Hitch Setup Controls Module Communication Error. John Deere System Alert.

AIC 521480.02 (AIC )

Code: 521480.02



This error code identifies a LIN data fault in the rear hitch setup controls module, specifically with the LIN Bus module at position S. The error is characterized by a data transfer problem between the AIC (Armrest Interface Control) software and the LIN Bus module, indicating issues within the LIN Bus system or problems with the module’s ability to transmit data correctly.


The control unit has reduced functionality in response to the identified issue to prevent incorrect hitch operations and potential damage to the system, maintaining safety and operational integrity.


  • Inspect LIN Bus Module and System: Thoroughly check the LIN Bus module at position S for any signs of damage or malfunction. Review the overall LIN Bus system for faults.
  • Conduct Diagnostic Tests: Use diagnostic tools to assess the ability of the LIN Bus module to properly transmit and receive data. Ensure that it is functioning within the system’s required parameters.
  • Repair or Replace Faulty Wiring and Connections: Identify and correct any faulty wiring or poor connections that could be affecting data transmission.
  • Module Replacement: If diagnostics reveal that the module is defective, consider replacing it to restore full functionality to the rear hitch setup controls.
  • System Reset and Testing: After making necessary repairs or replacements, reset the system and perform a series of tests to confirm that all parts of the rear hitch setup are communicating effectively and operating as intended.


Maintaining the LIN Bus system in optimal condition is crucial for the reliable operation of complex agricultural machinery. Regular inspections and prompt resolution of communication issues are key to preventing operational disruptions and ensuring the equipment functions safely and efficiently.