Description:

This diagnostic trouble code (DTC) UIC 523953.02 is triggered when the control unit detects a mismatch between the output signals of the potentiometer on the speed control lever (B67). The voltage at channel 1 (lead 6037) must be double the voltage of channel 2 (lead 6038).

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 Potentiometer Connections:
  • Check the wiring connections at the speed control lever potentiometer for any loose, damaged, or corroded connectors.
  • Measure the output voltages at channel 1 (lead 6037) and channel 2 (lead 6038) to confirm the discrepancy.
• Verify Voltage Ratios:
  • Ensure that the voltage at channel 1 is exactly double the voltage at channel 2. If the ratio is incorrect, recheck the wiring and sensor.
• Replace Potentiometer:
  • If the wiring and connections are intact and the voltage ratio remains incorrect, 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:

Intermittent faults in the wiring or connectors can cause voltage mismatches. Ensure a thorough inspection to avoid repeat occurrences.