Massey Ferguson E654.05 – Engine ECU: Injector Number 4 Low Amp Draw

The engine controller is detecting that the electrical current flowing to the fuel injector solenoid on cylinder #4 is lower than the expected threshold. This condition is typically caused by an open circuit, high resistance in the wiring harness, a loose or corroded connector, or an internal failure (open coil) within the injector solenoid itself.

• 7616
• 5612
• 7622
• Interim Tier 4 (2012-2015)
• 7614
• 5611
• 7615
• 5610
• 5613
• 7620
• 5609
• 7618
• 5608
• 7619
• 7626
• 7624
• 4700 Series
• 4707
• 4708
• 4709
• 4710
• 5600 Series
• 5700 Series
• 5710SL
• 5711SL
• 5712SL
• 5713SL
• 6700 Series
• 6712
• 6713
• 7600 Series
• 7614-7626
• 7700 Series
• 7714-7726
• 8600 Series
• 8700 Series

1. 1

   Visual Inspection: Inspect the wiring harness running from the Engine ECU to the cylinder #4 injector. Look for chafed wires, melted insulation, or pinch points.

2. 2

   Connector Check: Disconnect the electrical plug at Injector #4 and at the ECU. Inspect the pins for corrosion, moisture, or pushed-back terminals.

3. 3

   Injector Solenoid Resistance Test (Injector Cause): Using a multimeter, measure the resistance across the two pins directly on the cylinder #4 injector. An infinite reading (OL) or a reading significantly out of OEM specification indicates an internal open circuit, meaning the injector has failed.

4. 4

   Harness Continuity Test (Wiring Cause): Measure the continuity of the two wires from the injector connector back to the ECU harness connector. High resistance or no continuity indicates a broken wire in the harness.

1. 1

   Preparation

   Disconnect the tractor's battery to prevent electrical shorts or ECU damage. Clean the area around cylinder #4 thoroughly to prevent debris from entering the engine block or fuel system.

2. 2

   Removal

   Disconnect the electrical connector from Injector #4. Remove the high-pressure fuel injector pipe connecting the common rail to the injector. Disconnect the fuel leak-off (return) pipe from the injector. Remove the injector hold-down clamp/bolt and carefully extract the injector from the cylinder head.

3. 3

   Installation

   Install the new injector, ensuring you use a new copper sealing washer at the base. Reinstall the hold-down clamp and torque the bolt to the OEM specification. Reconnect the high-pressure fuel line and the leak-off pipe, torquing the fittings to spec. Reconnect the electrical connector.

4. 4

   ECU Calibration

   You must program the new injector's QR code / calibration code into the Engine ECU using an AGCO diagnostic tool (EDT). If you skip this step, the ECU will log a secondary fault code: 654.13 (Injector #4 Calibration Fault).

5. 5

   Finalizing

   Reconnect the battery, prime/bleed the fuel system if required by the specific engine manual, start the tractor, and clear the inactive fault codes from the ECU.