Massey Ferguson 654.05 – ECU: Injector Number 4 Low Amp Draw

The control module is detecting that the electrical current (amperage) flowing to the electronic fuel injector on cylinder #4 is lower than the required threshold. This condition typically points to an open circuit, a disconnected plug, damaged wiring (high resistance), or a failed internal solenoid within the injector itself.

• 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

   Note if the tractor is experiencing hard starting, rough idling, loss of power, or abnormal smoke, which are classic symptoms of a dropped cylinder/failing injector.

2. 2

   Inspect the wiring harness leading to the #4 cylinder injector. Look for chafed wires, melted insulation, or a loose/unclipped connector.

3. 3

   Disconnect the plug at injector #4. Check for corrosion, moisture, or bent pins inside the connector.

4. 4

   Using a multimeter, measure the resistance across the terminals of the #4 injector solenoid. Compare this reading to a known good injector (e.g., cylinder #3). If the resistance is infinitely high (open) or out of specification, the injector has failed internally.

5. 5

   Check the continuity of the wires from the injector connector back to the ECU pinout to rule out a broken wire in the main harness.

1. 1

   Prep the machine

   Turn off the tractor, remove the key, and disconnect the negative battery terminal to prevent electrical shorts.

2. 2

   Clean the area

   Thoroughly clean the area around the #4 injector to prevent dirt or debris from falling into the cylinder head or fuel rail during removal.

3. 3

   Remove fuel lines

   Carefully loosen and remove the high-pressure fuel line and the return line connected to the #4 injector. Cap the rail and lines immediately.

4. 4

   Extract the injector

   Remove the injector hold-down clamp/bolt and carefully pull the injector from the cylinder head.

5. 5

   Install the new injector

   Ensure the injector bore is clean. Install the new injector using a new copper sealing washer and O-rings. Torque the hold-down clamp to the OEM specification.

6. 6

   Reconnect lines and wiring

   Reinstall the high-pressure and return fuel lines. Reconnect the electrical harness plug until it clicks securely.

7. 7

   ECU calibration

   Use a diagnostic tool to program the new injector's calibration code (trim code) into the ECU. Failure to do so may trigger a related fault code (e.g., 000654.13 - Injector Number 4 Calibration Code Issue).

8. 8

   Bleed the system

   Prime and bleed the fuel system to remove any air locks introduced during the repair.

9. 9

   Test operation

   Reconnect the battery, start the engine, check for fuel leaks, and verify that the fault code has cleared and the engine runs smoothly.