CCU 523698.09 – AMS Display Message Missing

CCU 523698.09 (CCU )

Code: 523698.09



This fault code occurs when the Chassis Control Unit (CCU) fails to receive necessary messages from the GreenStar™ Display, part of John Deere’s Advanced Management System (AMS). This communication failure can affect the operator’s ability to monitor and control various aspects of the vehicle’s performance and settings.


The functionality of systems dependent on AMS information is degraded, potentially impacting the efficiency and effectiveness of operations.


  • Check AMS Display Connectivity: Inspect the connections between the CCU and the GreenStar™ Display to ensure they are secure and free of corrosion or damage.
  • Diagnose Network Issues: Use diagnostic tools to check for issues in the communication network that could be preventing message transmission.
  • Update Software: Ensure that both the CCU and the GreenStar™ Display have the latest software updates installed, which can resolve known bugs and compatibility issues.
  • Reconfigure Settings: If necessary, reconfigure settings to restore proper communication between devices.
  • Verify System Operation: After troubleshooting, verify that the AMS display is fully functional and all messages are being transmitted correctly.


Regular software updates and checks of communication systems are essential to ensure reliable operation and data exchange between different components of the vehicle’s management system.

Control Units: John Deere

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