BRC 523840.03 – High Voltage in Front Brake Pressure Sensor Circuit (50K Only). John Deere System Advisory.

BRC 523840.03 (BRC )

Code: 523840.03



Error code BRC 523840.03 is triggered when the voltage at the front brake pressure sensor in vehicles equipped with a 50K capability exceeds 4.50 volts. This high voltage could be indicative of an electrical fault such as a short circuit, sensor malfunction, or improper calibration of the sensor circuit, potentially leading to inaccurate brake pressure readings.


The high voltage in the sensor circuit has caused a degradation in the functionality of the brake system. This means that while the brakes may still function, their effectiveness and reliability could be compromised, potentially affecting the vehicle’s safety.


  • Inspect Sensor and Wiring: Check the front brake pressure sensor and associated wiring for signs of damage, corrosion, or loose connections that could be causing the high voltage readings.
  • Test Sensor Output: Use a multimeter to test the voltage levels at the sensor under different conditions to verify if the high voltage is consistent or a result of a transient fault.
  • Replace Faulty Sensor: If the sensor is found to be faulty or the circuit is damaged, replace it to ensure accurate and reliable brake pressure readings.
  • Evaluate Vehicle’s Electrical System: Assess the vehicle’s overall electrical system, especially circuits connected to the brake pressure sensor, for any issues that might cause over-voltage.
  • Calibrate and Test the System: After addressing any hardware issues, recalibrate the sensor according to manufacturer specifications and perform comprehensive testing to ensure the system operates correctly under all conditions.


Maintaining accurate sensor readings and electrical integrity is crucial for the safe operation of the braking system, particularly in vehicles with advanced capabilities like the 50K system. Regular inspections and timely maintenance of electrical and sensor components are essential to ensure the vehicle remains safe and operational.