John Deere 001075.15 – ECU: Electric Low-Pressure Fuel Pump Issue

The Engine Control Unit (ECU) has detected an operational anomaly with the electric low-pressure fuel pump (lift pump). The FMI 15 code indicates a least severe or slightly high condition, such as the pump drawing slightly high current or operating outside normal parameters. This can result in hard starting, power loss under load, rough running, or stalling.

• Late 6020
• 6030 series
• 7430 series
• 7530 series
• 1000 series
• 2000 series
• 3000 series
• 4000 series
• 9R 640
• 9570R
• 9620R
• 6135 Diesel Engine

1. 1

   Check for other active or stored fault codes using a diagnostic scanner to provide more context.

2. 2

   Inspect and replace primary and secondary fuel filters, as clogs are the most common cause of low fuel pressure.

3. 3

   Check fuel supply and quality, ensuring the tank is not empty, fuel is not contaminated, and draining any water from the fuel/water separator.

4. 4

   Inspect fuel lines for kinks, collapses, leaks, or air leaks in the suction line.

5. 5

   Verify electrical connections at the fuel pump for damage, corrosion, or loose connections.

6. 6

   Test pump operation by turning the key to the 'on' position (without starting) and listening for a click or hum.

7. 7

   Perform a pressure test using a fuel pressure gauge to confirm if the pump is generating adequate pressure.

1. 1

   Disconnect Power

   Disconnect the negative battery terminal to ensure safety.

2. 2

   Locate the Pump

   The pump is typically located along the frame rail or near the fuel filter housing.

3. 3

   Clean the Area

   Thoroughly clean the area around the fuel pump and its connections to prevent contamination of the fuel system.

4. 4

   Disconnect Fuel Lines and Electrical Connector

   Carefully disconnect the fuel inlet and outlet lines and the electrical connector from the pump. Be prepared for some fuel spillage.

5. 5

   Remove the Old Pump

   Unbolt the pump from its mounting bracket.

6. 6

   Install the New Pump

   Lubricate the O-rings on the new pump if applicable and install it in the reverse order of removal. Ensure the wiring harness connector is properly oriented.

7. 7

   Reconnect and Prime

   Reconnect the fuel lines, electrical connector, and battery. Prime the fuel system according to the procedure in the operator's manual to remove any air introduced into the system.

8. 8

   Clear Fault Codes

   After the repair, clear the fault codes using a diagnostic tool and run the machine to ensure the code does not reappear.