BCU 523814.00 – Current Overload Protection Activated for Y74 Solenoid, PTO Speed 2. John Deere System Advisory.

BCU 523814.00 (BCU )

Code: 523814.00



Diagnostic trouble code BCU 523814.00 is issued when the power module PC5 detects a total amperage exceeding 40 amps at the B3, C3, and D3 outputs. This specific code relates to the Y74 solenoid for PTO (Power Take-Off) Speed 2. The high current condition often suggests a short to ground or a defective component within the circuits, which could also impact:

  • Output B3: Y75 Solenoid for PTO Speed 3, potentially triggering diagnostic trouble code BCU 523806.00.
  • Output C3: Y73 Solenoid for PTO Speed 1, potentially triggering diagnostic trouble code BCU 523811.00.


To prevent electrical damage or hazards such as overheating or potential fire, the power module activates current overload protection. This protective measure likely results in the deactivation of the outputs to stop further electrical damage. Alerts or warnings may be issued to inform the operator of the fault and necessary corrective actions.


  • Inspect Wiring and Connectors: Check the wiring and connectors for outputs B3, C3, and D3. Look for any signs of damage, corrosion, or loose connections that could be causing the excessive current.
  • Test Electrical Components: Use electrical testing tools to examine the solenoids and other components connected to these outputs for shorts or other faults.
  • Replace or Repair Faulty Components: If specific components or sections of wiring are found to be faulty, replace or repair them to restore proper functionality and prevent further issues.
  • Reset and Monitor the System: After making repairs, reset the power module and monitor the system to ensure that the current levels have returned to normal and that no further overload conditions occur.
  • Review Additional Diagnostic Codes: Since this issue may trigger related diagnostic codes, review and resolve any additional codes that appear as a result of this overload condition to ensure comprehensive resolution.


Regular monitoring and maintenance of the electrical components involved in the PTO system are crucial for ensuring the safe and efficient operation of agricultural machinery. Addressing current overload issues promptly helps maintain operational efficiency and prevent damage to the machinery, thereby minimizing downtime and enhancing equipment longevity.

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