Massey Ferguson 1076.03 – Engine ECU: Voltage Issue On Fuel Solenoid On High Pressure Pump (ECU)

The engine management system has detected a High side short circuit to HIGH SOURCE (battery voltage) on the high-pressure pump control valve (MPROP).

• 4710
• 7724S
• 5712SL
• Interim Tier 4 (2012-2015)
• 7722
• 7722S
• 7615
• 5613
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7616
• 7618
• 5608
• 4708
• 7619
• 7626
• 7726S
• 7624
• 4707
• 4709
• 5711SL
• 7614
• 7718S
• 5610
• 7620
• 7719
• 7714
• 7716S
• T4 (2015-2021)
• 5612
• 7622
• 7720
• Tier 4 (2015-2021)
• 5611
• 7715S
• 5609
• 7724

1. 1

   Inspect the MPROP solenoid valve connector on the high-pressure fuel pump for damage, corrosion, or pushed-out pins.

2. 2

   Test the solenoid valve wiring harness back to the ECU to check for a short circuit to battery voltage (high source).

3. 3

   Test the solenoid by temporarily plugging in another known-good MPROP solenoid valve to see if the fault clears, which indicates an internal short.

1. 1

   Turn off engine and disconnect battery

   Turn off the engine, remove the key, and disconnect the battery to ensure safety while working on the electrical and fuel systems.

2. 2

   Locate MPROP valve

   Locate the MPROP (Fuel Pressure Control Valve) mounted on the Bosch high-pressure fuel injection pump.

3. 3

   Clean area

   Thoroughly clean the area around the valve to prevent dirt from entering the high-pressure fuel system.

4. 4

   Disconnect electrical connector

   Disconnect the electrical connector from the MPROP solenoid.

5. 5

   Remove fasteners

   Remove the mounting fasteners securing the valve to the pump body.

6. 6

   Remove valve

   Carefully pull the valve out of the pump.

7. 7

   Lubricate O-rings

   Lubricate the O-rings on the new MPROP valve with clean diesel fuel or engine oil to prevent tearing during installation.

8. 8

   Install new valve

   Insert the new valve into the pump and torque the mounting fasteners to the manufacturer's specifications.

9. 9

   Reconnect components

   Reconnect the electrical connector and the battery.

10. 10

    Test and clear codes

    Turn the key to the ON position to allow the lift pump to prime the system. Start the engine, clear the fault codes using a diagnostic scan tool, and verify that 001076.03 does not return.