AIC 523652.09 – Missing Communication with Armrest Engine Speed Control Module. John Deere System Alert.

AIC 523652.09 (AIC )

Code: 523652.09



This error code AIC 523652.09 indicates a communication failure where the Armrest Interface Control software (AIC) is not receiving the necessary LIN message from the Armrest Engine Speed Control Module. The issue has been pinpointed to a data transfer problem between the AIC and the LIN Bus at position H, suggesting either a malfunction within the LIN Bus system or a fault in the transmitting LIN Bus module.


Due to the communication breakdown, the control unit has switched to a limited function mode. This precaution limits certain functionalities related to the engine speed control to prevent potential errors and maintain operational safety.


  • Inspect the LIN Bus Module at Position H: Check for any signs of damage or malfunction in the LIN Bus module responsible for transmitting data. Look for physical damage, loose connections, or signs of corrosion.
  • Diagnose Connectivity and Network Integrity: Use diagnostic tools to test the LIN Bus network’s connectivity and integrity, especially focusing on the connections at position H.
  • Resolve Wiring and Connectivity Issues: Repair or replace any faulty wiring or connectors that may be causing disruption in communication. Ensure all connections are secure and free of defects.
  • Replace Faulty LIN Bus Module if Necessary: If the LIN Bus module at position H is found to be defective, consider replacing it to restore proper communication within the system.
  • Reset the System and Conduct Comprehensive Tests: After addressing the identified issues, reset the system to clear any error states and conduct comprehensive tests to ensure that the armrest engine speed control module is communicating effectively and the system is functioning correctly.


Maintaining the LIN Bus and its associated modules in good working order is crucial for the seamless operation of advanced control systems in agricultural machinery. Regular monitoring and maintenance can prevent communication failures and ensure the machinery operates reliably and efficiently.