AIC 521570.09 – Missing Data Message in Rear Hitch Setup Controls. John Deere System Notification.

AIC 521570.09 (AIC )

Code: 521570.09



The error code AIC 521570.09 is reported due to the Armrest Interface Control software (AIC) not receiving essential LIN messages from the armrest rear hitch setup controls module. This issue, occurring at position S of the LIN Bus module, suggests a significant data transfer problem that may be due to faults within the LIN Bus system or a malfunction in the transmitting LIN Bus module.


In reaction to this missing data communication, the control unit has automatically limited the functionality of the rear hitch setup controls to mitigate the risk of operational errors or potential equipment damage.


  • Inspect LIN Bus Module and Connections: Examine the LIN Bus module at position S for any signs of damage, malfunction, or misconfiguration that could disrupt normal operation.
  • Perform Comprehensive Diagnostic Tests: Utilize specialized diagnostic equipment to thoroughly test the data transmission capabilities of the LIN Bus module to ensure it can reliably send and receive messages.
  • Check and Repair Wiring Issues: Assess and rectify any faulty wiring or improper connections that may be impacting the communication efficiency of the LIN Bus module.
  • Replace Defective LIN Bus Module: If the module is found to be defective through diagnostics, replace it to ensure that communication is restored to optimal levels.
  • System Reset and Operational Verification: After repairs or replacements are made, reset the system and conduct extensive tests to verify that the rear hitch setup controls are fully functional and the LIN message issue has been resolved.


Regular monitoring and maintenance of the LIN Bus system are crucial to prevent communication failures and ensure the smooth operation of agricultural machinery. Implementing proactive diagnostics and maintaining updated firmware and software can significantly enhance the reliability and safety of the equipment.