CCU 524255.31 – Rear PTO Remote Switch Enabled (Rear Remote PTO Enabled)

CCU 524255.31 (CCU )

Code: 524255.31



This fault code indicates that the Chassis Control Unit (CCU) detects the rear PTO external switch function is being requested while the rear PTO switch is off. This serves as a safety alert to indicate that the CCU is ready to turn on the rear PTO with the external switch. The code primarily acts as a reminder for proper switch engagement sequence.


The functionality of the rear PTO is degraded until the correct switch engagement sequence is followed.


  • Follow Correct Engagement Sequence:
    • Ensure the rear PTO preselector switch is turned on first, followed by the rear PTO switch, and then the rear PTO external switch.
  • Check Switch Functionality:
    • Inspect the rear PTO switches for proper operation. Ensure they are functioning correctly and providing accurate signals to the CCU.
  • System Verification:
    • If the rear PTO system is not functional, conduct diagnostics to check for any underlying issues that might be causing the problem.
    • Test the system by following the correct switch engagement sequence to ensure proper operation.


Adhering to the correct switch engagement sequence is crucial for the safe and effective operation of the rear PTO. Operator training and regular checks of switch functionality can help prevent such issues.

Control Units: John Deere

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