Deutz-Fahr 573 – ECM: Injector 6 Power Interruption

The Engine Control Module (ECM) has detected an open circuit or a break in the electrical connection to fuel injector 6. The ECM monitors the electrical current when it actuates each injector; if it detects low or no current flow on the injector 6 circuit, it registers this fault. This interruption prevents the injector from delivering the correct amount of fuel, or any fuel at all, to the cylinder, leading to engine performance issues.

• Deutz TCD 2.9 L4
• Deutz TCD 3.6 L4
• Deutz TCD 4.1 L4
• Deutz TCD 6.1 L6
• Deutz engines from 4 to 16 liters
• Deutz 1011 Series
• Deutz 2011 Series

1. 1

   Visually inspect the wiring harness leading to injector 6 for physical damage, chafing, cuts, or heat damage from exhaust components.

2. 2

   Disconnect and inspect the electrical connectors at injector 6 and the ECM. Look for corrosion, dirt, oil, or moisture, and clean with a deoxidizing spray if necessary.

3. 3

   Check for intermittent faults by wiggling the wiring harness while the engine is running at idle to see if it triggers the fault or changes engine performance.

4. 4

   Perform a resistance test on the injector solenoid by measuring across its terminals (12-17 ohms for high-impedance, 2-5 ohms for low-impedance). An infinite reading indicates an open circuit within the injector, requiring replacement.

5. 5

   Perform a wiring continuity test on the power and ground wires between the ECM connector and the injector connector. An infinite reading indicates a broken wire.

6. 6

   Perform a voltage test on the wiring harness with the key ON (engine OFF). Probe the injector harness connector terminals; one should show approximately 12 volts. A lower or absent reading indicates a wiring or ECM power supply issue.

1. 1

   Prepare the machine

   Park the machine on a level surface, engage the parking brake, turn off the engine, and allow it to cool down.

2. 2

   Clean the work area

   Thoroughly clean the area around the valve cover and injector 6 to prevent dirt and debris from entering the engine or fuel system.

3. 3

   Access the injector

   Remove the valve cover to gain access to the fuel injectors.

4. 4

   Disconnect fuel lines

   Disconnect the high-pressure fuel line and the fuel return line from injector 6. Plug the lines to prevent contamination.

5. 5

   Remove the injector

   Loosen and remove the hold-down clamp or bolt that secures the injector in the cylinder head. Carefully remove the injector, using a specialized puller tool if it is seized.

6. 6

   Install the new injector

   Ensure the injector bore is clean. Apply a thin coat of anti-seize compound to the threads of the new injector. Install it with a new copper washer and O-rings, then torque the hold-down clamp to the manufacturer's specification.

7. 7

   Reconnect fuel lines

   Reconnect the high-pressure and return fuel lines using new copper washers where applicable.

8. 8

   Final Assembly

   Reinstall the valve cover with a new gasket if necessary.

9. 9

   Bleed the fuel system

   If the system has been opened, it may be necessary to bleed the air from the fuel system according to the manufacturer's procedure.

10. 10

    Test the engine

    Start the engine and check for any fuel leaks around the newly installed injector and its connections. Clear the fault codes using a diagnostic tool and verify that fault 573 does not reappear.