SSU 523766.02 – Invalid Entry for System Activation

SSU 523766.02 (SSU )

Code: 523766.02



This diagnostic trouble code (DTC), SSU 523766.02, is triggered if the system has been deactivated at address SSU039. This indicates an invalid entry for system activation.


When this error is detected, the system may not activate as expected, potentially leading to operational limitations or inability to utilize certain system functions.


Verify System Activation Settings:

  • Check the system activation settings at address SSU039.
  • Ensure that the system is correctly activated according to the manufacturer’s specifications.

Update Software:

  • Ensure that the software related to the system activation is up-to-date. Apply any available firmware updates to improve system performance and compatibility.

Consult Technical Support:

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


  • Regular verification of system activation settings can help prevent operational issues.
  • Ensuring the system is correctly configured is crucial for the reliable operation of the vehicle’s systems.

Control Units: John Deere

John Deere Parts
John Deere Logo