John Deere 1347.03 – ECU: Suction Control Valve Signal Out of Range High / Pump Control Valve Current High

The engine's control module has detected that the voltage or current in the circuit for the high-pressure fuel pump's Suction Control Valve (SCV) exceeds the maximum specification. This typically indicates a short to power in the wiring harness or an internal short within the valve's solenoid itself, forcing the valve to close and often putting the engine into a derate (limp) mode.

• 5085M
• 5095M
• 5095MH
• 5105M
• 5015ML
• 6120-6420
• 6230-6430
• 7130-7930
• 7720-7920
• 7185J-7225J
• 8130-8430
• 8225R-8370R
• 9470RT
• 9520RT
• 9570RT
• 9550-9770 STS
• S550
• S650-S770
• 3520
• 3522
• 7180-8200
• 135G
• 210G
• 245GLC
• 350GLC
• 380GLC
• 444J
• 544J
• 624J
• 524K-744K
• 700K-850K
• 670G-872G
• 4730
• 4830
• 4930
• 4940
• R4038
• R4045

1. 1

   Inspect the wiring harness running from the ECU to the high-pressure fuel pump for chafed wires, melted insulation, or areas where the wire might be shorting to a 12V/24V power source.

2. 2

   Disconnect the plug at the Suction Control Valve and the ECU harness connector to check for corrosion, water ingress, or bent pins.

3. 3

   Using a multimeter, measure the resistance across the pins of the Suction Control Valve and compare to OEM specifications. An abnormally low resistance reading indicates the solenoid is internally shorted.

4. 4

   Turn the key to the ON position (engine off) and probe the harness connector to ensure it is receiving the correct reference voltage from the ECU without any rogue high-voltage spikes.

1. 1

   Prep

   Turn off the machine, remove the key, and disconnect the negative battery cable. Clean the area around the high-pressure fuel pump thoroughly to prevent dirt from entering the fuel system.

2. 2

   Disconnect

   Unplug the electrical connector from the Suction Control Valve (located on the Denso high-pressure fuel pump).

3. 3

   Removal

   Remove the mounting fasteners (usually two Allen or Torx bolts) securing the SCV to the pump housing. Carefully pull the valve straight out.

4. 4

   Installation

   Lubricate the O-rings on the new Suction Control Valve with clean diesel fuel or engine oil. Insert the new valve into the pump housing, ensuring it seats squarely without pinching the O-rings.

5. 5

   Secure

   Install the mounting bolts and torque them to the specification listed in your specific engine's technical manual.

6. 6

   Reassembly

   Reconnect the electrical harness. Reconnect the battery.

7. 7

   Clear & Test

   Turn the key on and use the CommandCenter display or a diagnostic scan tool to clear the 001347.03 code. Start the engine and verify that the code does not return and that the fuel rail pressure matches the commanded pressure.