BCU 523703.15 – High Voltage in Right Draft Sensor Detected. John Deere System Advisory.

BCU 523703.15 (BCU )

Code: 523703.15



The diagnostic trouble code BCU 523703.15 is generated when the Body Control Unit (BCU) detects that the voltage at the signal input of the right-hand draft sensor exceeds the threshold of 4.75 volts. This high voltage condition typically indicates a malfunction within the draft sensor circuit, which could be caused by an electrical short, incorrect wiring, or a fault within the sensor itself.


Upon detecting this high voltage, the BCU may disable the sensor or related systems to prevent inaccurate measurements and potential damage to the machinery, which relies on precise sensor data for operational control.


  • Inspect Wiring and Connections: Check the wiring and connectors associated with the right-hand draft sensor for any signs of damage, corrosion, or incorrect connections that could result in high voltage readings.
  • Test the Sensor and Circuit: Utilize a multimeter or similar diagnostic tool to measure the voltage levels within the sensor circuit. This can help pinpoint areas where voltage may be leaking or where shorts may have developed.
  • Replace or Repair Faulty Components: If specific components or sections of wiring are found to be faulty, replace or repair them to restore normal operation and voltage levels.
  • Re-calibrate the Sensor: After making necessary repairs, recalibrate the draft sensor to ensure it provides accurate and reliable readings.
  • Verify System Integration: Ensure that the sensor is properly integrated into the overall system, with no additional factors or external influences affecting its performance.


Regular maintenance and calibration of sensors are essential for the efficient operation of agricultural equipment. Monitoring and maintaining proper voltage levels in sensor circuits is crucial for preventing malfunctions that could impact the accuracy and reliability of operations. Prompt attention to such issues helps maintain operational efficiency and extend the lifespan of the equipment.