PL1 521979.06 – Keep-Alive Voltage for Park Lock, Current Too High

PL1 521979.06 (PL1 )

Code: 521979.06

Shortcode:

Description:

This diagnostic trouble code is generated when the control software detects excessively high current in the circuit for the keep-alive voltage of the park lock. This indicates a short circuit within the system, leading to driver outputs for gear shifting (DirectDrive transmission) being switched off.

Reaction:

The gear shifting functionality is disabled to prevent further damage due to the short circuit.

Recommendations:

  • Inspect Wiring and Connections:
    • Check the wiring for any signs of damage, fraying, or short circuits.
    • Ensure all connections are secure and free from corrosion.
  • Test Circuit Components:
    • Verify the components within the keep-alive voltage circuit for faults or short circuits.
    • Replace any faulty components to restore proper functionality.
  • Check Control Unit:
    • Ensure that the control unit is functioning correctly and not contributing to the high current draw.
  • Consult Technical Support:
    • If the issue persists, seek assistance from technical support to diagnose and resolve the short circuit.

Note:

Regular inspection and maintenance of electrical circuits can help prevent issues related to high current draw and ensure reliable park lock operation.


Control Units: John Deere

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