SSU 523768.09 – Axle Message Missing

SSU 523768.09 (SSU )

Code: 523768.09



This diagnostic trouble code (DTC), SSU 523768.09, is triggered when the Steering System Control Unit (SSU) detects that the front axle type message is not available on the CAN Bus. This indicates a communication issue with the axle type information on the CAN Bus network.


When this error is detected, the steering system may not function correctly, potentially leading to operational issues and compromised vehicle control.


Verify CAN Bus Communication:

  • Inspect the CAN Bus wiring and connectors for any signs of damage, loose connections, or corrosion.
  • Use diagnostic tools to check for continuity and proper voltage levels in the CAN Bus lines.

Check Front Axle Type Sensor:

  • Ensure that the front axle type sensor is functioning properly and transmitting data correctly.
  • Verify that the sensor is correctly configured and operating.

Update Software:

  • Ensure that all related system software, including that of the CAN Bus and front axle type sensor, is up-to-date. Apply any available firmware updates to improve communication protocols.

Replace Faulty Components:

  • If the front axle type sensor or any components within the CAN Bus network are found to be defective, replace them with new, genuine parts.

Consult Technical Support:

  • If the error persists after performing the above steps, consult technical support or the manufacturer for further assistance.


  • Regular maintenance and inspection of the CAN Bus network and connected components can help prevent communication issues.
  • Keeping the system firmware up-to-date ensures compatibility and reliability of the vehicle’s communication systems.

Control Units: John Deere

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