JDL 298878.31 – Line Busy

JDL 298878.31 (JDL )

Code: 298878.31



This diagnostic trouble code, JDL 298878.31, is triggered when no connection can be made due to a busy line. The JDL control unit automatically attempts to make a new connection.


When this error code is triggered, the equipment may experience delays or failures in establishing a connection. This can affect remote communication and data transmission.


Verify Network Availability:

  • Check the network status to ensure it is available and not experiencing high traffic or outages.

Check Modem Settings:

  • Verify that the modem settings are configured correctly for the network. Ensure dial-up settings or other connection parameters are correctly set.

Reduce Network Load:

  • If possible, reduce the load on the network by limiting the number of devices or connections. This can help improve the chances of establishing a successful connection.

Reset Modem:

  • Perform a reset of the modem by disconnecting and reconnecting the power supply. This can sometimes resolve temporary connectivity issues.

Consult Technical Support:

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


Busy line issues can be caused by network congestion, incorrect settings, or temporary outages. Ensuring proper configuration and monitoring network conditions can help maintain reliable connectivity.

Control Units: John Deere

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