Description:

This diagnostic trouble code (DTC) UIC 524169.03 is generated when the control unit measures a voltage in excess of 4.5 volts at the signal input of the left brake pedal potentiometer. This indicates a short in or a problem with the ground connection in the potentiometer’s circuit.

Reaction:

When this error occurs, the control unit may limit the functionality of the brake system to ensure safe operation and prevent potential damage.

Recommendations:

• Inspect Brake Pedal Sensor Unit:
  • Check the B88 sensor unit for proper operation and ensure the left brake pedal potentiometer is not shorted or malfunctioning.
• Inspect Ground Connection:
  • Ensure the ground connection for the potentiometer circuit is secure and free of corrosion or damage.
• Check Wiring and Connections:
  • Inspect all wiring and connectors related to the left brake pedal potentiometer for any signs of shorts or damage.
• Replace Faulty Components:
  • If the potentiometer or ground connection is found to be faulty, replace or repair as necessary.
• Consult Technical Support:
  • If the issue persists, contact John Deere technical support for further diagnostics and potential solutions.

Note:

High voltage readings could also be due to intermittent faults in the wiring or connectors. Ensure a thorough inspection to avoid repeat occurrences.