Description:

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.

Reaction:

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

Recommendations:

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.

Note:

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.