ECU 001347.03 – Pump Control Valve Current High. John Deere System Advisory.

ECU 001347.03 (ECU 1347.03)

Code: 001347.03

Shortcode: 1347.03


Error code ECU 001347.03 is triggered when the ECU detects high current in the pump control valve return lead. This condition suggests a potential electrical fault such as a short circuit or malfunctioning control valve.


The ECU may limit or adjust the operation of the pump control valve to prevent potential damage due to high current.


  • Inspect Control Valve Wiring: Check the wiring and connectors leading to the pump control valve for signs of damage, corrosion, or loose connections that could cause high current readings.
  • Measure Current in Circuit: Use a multimeter to measure the current in the pump control valve circuit and identify any points of high current or shorts.
  • Check for Short Circuits: Inspect the wiring for any signs of short circuits to power sources or ground. Pay close attention to the harness and connectors.
  • Test Control Valve Operation: Verify that the pump control valve is functioning correctly and is not causing excessive current draw.
  • Repair or Replace Faulty Components: Address any identified issues by repairing or replacing damaged wiring, connectors, or the control valve itself.
  • Reset ECU and Verify Operation: After making the necessary repairs, reset the ECU to clear the error code and test the system to confirm that the pump control valve operates correctly and no further errors are detected.


Maintaining proper current levels in the pump control valve circuit is essential for reliable operation and avoiding potential electrical faults. Regular inspections and timely repairs can help prevent high current issues.

Control Units: John Deere

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