Description:

This diagnostic trouble code (DTC) UIC 523953.03 is generated when the control unit measures a voltage of more than 4.5 volts at the signal input from channel 1 of the potentiometer (B67, lead 6037). This indicates a problem either at the signal lead or at the potentiometer ground connection.

Reaction:

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

Recommendations:

• Inspect Signal Lead and Connections:
  • Check the wiring connections at the speed control lever potentiometer for any loose, corroded, or damaged connectors.
  • Measure the voltage at lead 6037 to confirm it exceeds 4.5 volts.
• Inspect Ground Connection:
  • Ensure the ground connection of the potentiometer is secure and free of corrosion or damage.
• Replace Potentiometer:
  • If the wiring and connections are intact and the voltage remains too high, consider replacing the potentiometer (B67).
• Consult Technical Support:
  • If the issue persists, contact John Deere technical support for further assistance and potential software updates.

Note:

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