OIC 003509.04 – 5-Volt Supply Voltage No. 1, Voltage Too Low

OIC 003509.04 (OIC 3509.04)

Code: 003509.04

Shortcode: 3509.04


This error code indicates that the voltage at the positive voltage supply lead for 5-volt components is less than 4.65 volts. This low voltage suggests a short to ground.


The control software may function in a limited capacity or not at all, affecting the operation of 5-volt components.


Inspect Power Supply:

  • Check the power supply for 5-volt components to ensure it is providing adequate voltage and not experiencing a drop.

Inspect Wiring and Connections:

  • Inspect all wiring and connections for the 5-volt components for signs of damage, loose connections, or corrosion. Repair or replace any faulty components.

Test Voltage Levels:

  • Use a multimeter to measure the voltage at the supply lead. Ensure it does not drop below 4.65 volts. If it does, investigate the power source for faults.

Verify Ground Integrity:

  • Ensure the ground connection is secure and free of corrosion. A poor ground can cause low voltage readings.

Replace Faulty Components:

  • If any component is found to be causing the low voltage, replace it with a properly functioning unit.

Update Control Software:

  • Ensure that the control software is updated to the latest version. Firmware updates might improve voltage regulation.

Consult Manufacturer Support:

  • If the issue persists, consult technical support or the manufacturer for further diagnostics and assistance.

Monitor System Performance:

  • After taking corrective actions, monitor the system to ensure the voltage remains within the specified range and the error does not recur.


Maintaining a stable power supply and proper connections is crucial for the reliable operation of 5-volt components.

Control Units: John Deere

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