CCU 523907.02 – PTO Remote Enable Switch Conflict

CCU 523907.02 (CCU )

Code: 523907.02



This fault code indicates a conflict with the PTO remote enable switch, where the control unit receives simultaneous high or low voltage inputs for both the ON and OFF states. Such conflicts can cause erratic or unreliable operation of the PTO system.


The functionality of the PTO system is degraded to prevent unsafe or unintended operation.


  • Inspect Remote Enable Switch: Check the PTO remote enable switch for proper function. Ensure it does not provide conflicting signals when toggled.
  • Examine Wiring and Connections: Inspect the wiring and connections associated with the remote enable switch for damage or short circuits. Repair or replace as necessary.
  • Test Voltage Levels: Use a multimeter to test the voltage levels at the switch to ensure they correspond correctly to the ON and OFF positions.
  • Replace Faulty Components: If the switch or any related components are found to be defective, replace them to restore proper operation.
  • System Reset and Verification: After resolving the issue, reset the control unit and verify the functionality of the PTO system.


Maintaining clear and accurate signaling for the PTO remote enable switch is vital for the safe operation of the PTO system. Regular checks and maintenance of electrical components can prevent such conflicts.

Control Units: John Deere

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