Massey Ferguson E656.05 – Engine ECU (Electronic Control Unit): Injector Number 6 Low Amp Draw

The Engine Control Unit has detected an open circuit or abnormally high resistance in the electronic circuit for the cylinder #6 fuel injector. The underlying condition is typically a broken wire, a disconnected plug, or an internal failure (open coil) within the injector's solenoid.

• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• Interim Tier 4 (2012-2015)
• 7714
• 7715
• 7716
• 7718
• 7719
• 7720
• 7722
• 7724
• 7726
• 8650
• 8660
• 8670
• 8680
• 8690
• 8727
• 8730
• 8732
• 8735
• 8737

1. 1

   Inspect the wiring harness running from the Engine ECU to the #6 cylinder fuel injector for chafing, melted wires, or physical breaks.

2. 2

   Disconnect the plug at the #6 injector and check for loose, pushed-back, or corroded pins. Ensure the connector is fully seated.

3. 3

   Using a multimeter, measure the resistance across the terminals of the #6 injector solenoid. If the reading shows infinite resistance (OL), the internal solenoid has failed and the injector must be replaced.

4. 4

   If the injector tests within normal resistance specs, test the continuity of the wiring harness between the injector connector and the ECU pinout to locate the open wire.

1. 1

   Preparation

   Turn off the tractor, remove the key, and disconnect the negative battery cable. Clean the area around the #6 injector thoroughly to prevent debris from entering the engine block.

2. 2

   Disconnect Lines

   Disconnect the electrical harness connector from the #6 injector. Carefully loosen and remove the high-pressure fuel line connecting the common rail to the injector. Cap the rail and line fittings immediately.

3. 3

   Remove Injector

   Remove the injector hold-down clamp/bolt. Carefully extract the injector from the cylinder head. (A specialized puller may be required if the injector is seized).

4. 4

   Clean the Bore

   Clean the injector bore in the cylinder head, ensuring no old copper sealing washers or carbon deposits are left behind.

5. 5

   Install New Injector

   Fit a new copper sealing ring to the new injector. Insert the injector into the bore.

6. 6

   Reassembly

   Reinstall the hold-down clamp and torque the bolt to the exact OEM specification. Reconnect the high-pressure fuel line (do not over-tighten) and plug in the electrical connector.

7. 7

   Calibration

   Use a diagnostic service tool to enter the new calibration code (QR code) printed on the injector into the Engine ECU to prevent calibration fault codes.

8. 8

   Final Steps

   Reconnect the battery, prime/bleed the fuel system, start the engine, check for fuel leaks, and clear the E656.05 fault code from the ECU.