Deutz-Fahr 585 – ECM: Injector 6 Short Circuit

The Engine Control Unit (ECU) has detected a short circuit in the electrical circuit for injector number six (identified after the firing order). This indicates that the injector's internal coil is shorted, the wiring is shorted to a power source, or the high and low side wires are shorted together. This condition disrupts proper engine operation and typically causes rough idling, reduced engine performance, increased fuel consumption, engine misfires, or hard starting.

• TCD 2012
• TCD 2013
• 511 Series
• 912 Series
• 913 Series
• BF6M1013
• 1012 Series

1. 1

   Visually inspect the wiring harness leading to injector #6 for chafing, melting, cracked insulation, or loose connections.

2. 2

   Check the injector connector pins for oil or fuel saturation that could disrupt the electrical connection.

3. 3

   Disconnect the injector and ECM connectors to perform electrical testing with a multimeter.

4. 4

   Check for a short to ground: Measure resistance between each wire on the injector #6 connector and the engine block (should be infinite).

5. 5

   Check for a short to battery: Measure voltage between each pin of the injector #6 connector and the battery negative terminal (should be 0V with key off).

6. 6

   Measure injector coil resistance across the two terminals of the injector itself (expected: 0.2 to 1.0 Ω; near zero indicates a shorted coil).

7. 7

   Perform a cylinder isolation test to confirm the faulty cylinder if the short is intermittent.

8. 8

   Perform a leak-off test to check for excessive return flow, which may indicate internal wear.

1. 1

   Depressurize fuel system

   Depressurize the common rail fuel system before starting work, as it holds extremely high pressure even when the engine is off. Wear appropriate PPE.

2. 2

   Repair wiring harness

   If diagnostic checks reveal a wiring fault (short to ground or battery), repair or replace the damaged section of the harness. Ensure all connections are clean, secure, and protected from heat and vibration.

3. 3

   Replace fuel injector

   If the injector coil resistance is near zero (shorted coil), replace the injector. Clean the area, disconnect lines, remove the hold-down clamp, and extract the injector. This may require a specialized puller tool if it is seized. Clean the bore and install the new injector with a new sealing washer.

4. 4

   Torque and reconnect

   Torque the hold-down bolt and fuel line connections to manufacturer specifications, then reconnect the electrical connector.

5. 5

   Reset and verify

   Clear fault codes from the ECM, start the engine, and check for leaks. Monitor the live data to ensure the new injector is functioning correctly and that no new fault codes appear. Program the new injector's calibration code (IMA code) into the ECM if required by your specific Deutz system.