BCU 523806.04 – High Current Detected for Y75 Solenoid, PTO Speed 3. John Deere System Advisory.

BCU 523806.04 (BCU )

Code: 523806.04



Diagnostic trouble code BCU 523806.04 is triggered when the power module PC5 measures a current exceeding 30 amps in lead 7115 while the Y75 solenoid for PTO (Power Take-Off) Speed 3 is activated. This abnormally high current typically indicates a short to ground within the circuit, which could lead to overheating, potential damage to the electrical components, and a risk of fire.


In response to this high current measurement, the power module likely activates its overload protection system, which may include shutting down the solenoid to prevent further damage. An alert may be displayed to notify the operator of the fault and the need for immediate attention.


  • Inspect Wiring and Connectors: Carefully examine the wiring and connectors associated with lead 7115. Look for signs of damage, wear, or improper connections that could be causing the short circuit.
  • Test for Short to Ground: Use a multimeter to test the circuit for continuity and to locate any potential short to ground. Pay special attention to areas where insulation may be compromised.
  • Replace or Repair Damaged Components: If any specific areas of damage or malfunction are identified, replace or repair the faulty wiring or components to resolve the short circuit issue.
  • Check Solenoid Integrity: Ensure that the Y75 solenoid itself is not the source of the short. If damaged, the solenoid should be replaced.
  • Reset and Test the System: After repairs are made, reset the power module and test the system to ensure that the issue has been resolved and that the current remains within safe operational limits.


Regular maintenance and proactive checks of the electrical systems are crucial for identifying and rectifying issues such as shorts and high current conditions. Early detection and correction of electrical faults help maintain the safety and efficiency of operations, thereby extending the life of the equipment. Addressing such issues promptly is key to minimizing downtime and ensuring that the PTO system remains operational and effective.