RPT 523666.04 – Control Software, Supply Voltage (BAT) Too Low

RPT 523666.04 (RPT )

Code: 523666.04



This diagnostic trouble code, RPT 523666.04, is triggered when the supply voltage (BAT) to the control software drops below 9 volts. Low voltage levels can lead to malfunctioning of the control software and affect the overall performance of the equipment.


When this error is detected, the functionality of the control software is significantly limited or entirely non-functional. This impacts the operation of the equipment, potentially leading to system failures or inefficiencies.


Inspect Power Supply:

  • Check the power supply unit to ensure it is operating within the specified voltage range.
  • Verify that the voltage regulator is functioning correctly and is not allowing voltages below 9 volts.

Examine Wiring and Connections:

  • Inspect the wiring and connections related to the power supply for any signs of damage, corrosion, or loose connections.
  • Repair or replace any damaged components.

Test Voltage Levels:

  • Use a multimeter to measure the voltage levels being supplied to the control software.
  • Ensure that the voltage remains within the safe operating range of 9 to 16 volts.

Update Control Software:

  • Confirm that the control software is updated to the latest version.
  • Apply any available patches or updates that address voltage regulation issues.

Consult Technical Support:

  • If the problem persists, consult with technical support or the equipment manufacturer for further assistance.
  • Provide detailed error logs and voltage measurements to aid in troubleshooting.

Monitor System Performance:

  • After addressing the issue, monitor the system to ensure the voltage levels remain stable and within the specified range.
  • Keep detailed records of any further voltage-related errors.


Low supply voltage can cause significant performance issues in the control software and other electronic components. Regular monitoring and maintenance of the power supply system are essential to prevent such issues.

Control Units: John Deere

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