Description:

This diagnostic trouble code (DTC) UIC 523954.11 is triggered if the control unit detects an incorrect combination of signals at the output channels (channel 1, lead 6079 and channel 2, lead 6048) of the speed wheel on the sensor unit for the speed control lever (S108).

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 Sensor Unit Connections:
  • Check the wiring connections at the speed wheel sensor unit for any loose, damaged, or corroded connectors.
  • Measure the output signals at channel 1 (lead 6079) and channel 2 (lead 6048) to confirm the discrepancy.
• Verify Signal Integrity:
  • Ensure that the signals at both channels match the expected values and do not show any incorrect combinations.
• Replace Sensor Unit:
  • If the wiring and connections are intact and the signal discrepancy remains, consider replacing the sensor unit (S108).
• 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 signal mismatches. Ensure a thorough inspection to avoid repeat occurrences.