JDL 000841.31 – Control Unit Internal Fault

JDL 000841.31 (JDL 841.31)

Code: 000841.31

Shortcode: 841.31


This diagnostic trouble code, JDL 000841.31, is triggered when the control unit does not recognize a valid internal GPS signal, similar to JDL 000841.12, but indicating a potential internal fault within the control unit itself.


When this error code is triggered, the equipment may experience reduced or lost GPS functionality, which can affect navigation and other GPS-dependent operations.


Inspect Control Unit:

  • Perform a visual inspection of the control unit for any signs of damage or internal faults.
  • Ensure all connections to the GPS module are properly seated and free from debris.

Update Control Unit and GPS Module Software:

  • Verify that the control unit and GPS module software are up-to-date. Install any available updates to address known issues and improve system stability.

Reset Control Unit:

  • Disconnect the power supply to the control unit for a few minutes and then reconnect it. This can sometimes clear temporary faults.

Consult Technical Support:

  • If the issue persists after performing the above steps, consult the manufacturer’s technical support for further assistance.
  • Provide the diagnostic trouble code and any relevant information gathered during the inspection.


Internal faults within the control unit may require more in-depth troubleshooting or replacement of the control unit if the issue cannot be resolved through standard measures.

Control Units: John Deere

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