PTD 003509.04 – 5-Volt Supply Voltage, Voltage Too Low

PTD 003509.04 (PTD 3509.04)

Code: 003509.04

Shortcode: 3509.04


This diagnostic trouble code is generated when the control software detects that the voltage at the positive lead of the voltage supply for 5-volt components is below 4.75 V, indicating a grounded circuit.


When this error is detected, the control software may limit or disable the transmission functions.


Inspect Voltage Supply Circuit:

  • Check the wiring and connections for any signs of grounding, damage, or corrosion.
  • Repair or replace any damaged components.

Test Voltage Regulator:

  • Verify that the voltage regulator is functioning correctly and providing a stable 5-volt output.
  • Replace the voltage regulator if it is found to be faulty.

Check Control Unit:

  • Ensure that the control unit is not causing the voltage drop to the 5-volt components.
  • Reprogram or update the control unit software if necessary.

Consult Technical Support:

  • If the issue persists, seek assistance from technical support or a qualified technician for further diagnosis and repair.

Monitor System:

  • After repairs, monitor the voltage levels to ensure they remain within the specified range.


Regular inspection and maintenance of the electrical system, including voltage regulators and supply circuits, can help prevent undervoltage issues and ensure reliable operation.

Control Units: John Deere

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