OIC 003598.06 – Supply Voltage 2 of the Cab Control Unit, Current Too High

OIC 003598.06 (OIC 3598.06)

Code: 003598.06

Shortcode: 3598.06


This error code indicates that the current for the cab control unit is too high, suggesting a short to ground.


The control software may function in a limited capacity or not at all, affecting the operation of the cab control unit.


Inspect Power Supply:

  • Check the power supply for the cab control unit to ensure it is not providing excessive current.

Inspect Wiring and Connections:

  • Inspect all wiring and connections for the cab control unit for signs of damage, loose connections, or corrosion. Repair or replace any faulty components.

Test Current Levels:

  • Use a multimeter to measure the current at the supply lead. Ensure it remains within the specified range. If it exceeds this range, investigate the power source for faults.

Verify Ground Integrity:

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

Replace Faulty Components:

  • If any component is found to be causing the high current, 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 current 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 current remains within the specified range and the error does not recur.


Maintaining proper current levels and ensuring good connections are essential for the reliable operation of the cab control unit.

Control Units: John Deere

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