Fendt 1E.1.61 – ECU: Misfiring on Cylinder 1

The engine control unit (Bosch EDC7) has detected a misfire event specifically isolated to cylinder number 1. In the Deutz/Fendt SERDIA diagnostic software, this corresponds to internal fault code FC:0026. This condition indicates a failure in the combustion process for that cylinder, which can be caused by wiring faults, a defective fuel injector, improper fuel rail pressure, or internal mechanical wear.

• 309 Vario COM III
• 310 Vario COM III
• 311 Vario COM III
• 312 Vario COM III
• 922 Vario COM III
• 924 Vario COM III
• 927 Vario COM III
• 930 Vario COM III
• 933 Vario COM III
• 936 Vario COM III
• 300 Vario COM III
• 400 Vario COM III
• 700 Vario COM III
• 800 Vario COM III
• 900 Vario COM III

1. 1

   Inspect wiring and connectors (especially Connector 'A') from the ECU to the cylinder 1 injector for chafing, breaks, or short circuits.

2. 2

   Perform an electrical resistance test on the cylinder 1 fuel injector.

3. 3

   Perform a leak-off test or temporarily swap the injector with cylinder 2 to see if the misfire code changes to 1E.1.62.

4. 4

   Verify that fuel rail pressure is within the target range.

5. 5

   Perform a mechanical compression test on cylinder 1 to rule out internal engine wear or valve issues.

1. 1

   Confirm fault code

   Connect the Fendt/Deutz SERDIA diagnostic software to the tractor to confirm the presence of code 1E.1.61 (FC:0026) and check for any accompanying electrical circuit codes.

2. 2

   Disconnect battery

   Disconnect the battery before unplugging the EDC7 ECU or injector harnesses.

3. 3

   Repair wiring harness

   Repair or replace the engine wiring harness if any continuity issues or shorts to ground are found between the ECU and cylinder 1.

4. 4

   Replace fuel injector

   If the wiring is sound but the injector failed the diagnostic checks, remove and replace the cylinder 1 common rail fuel injector.

5. 5

   Bleed fuel system

   Reconnect all components and bleed the fuel system if the injector was replaced.

6. 6

   Clear fault codes

   Reconnect the SERDIA diagnostic tool and clear the fault codes. Note that 'SERDIA (delete error)' is required to clear this specific EDC fault.

7. 7

   Test run tractor

   Test run the tractor under load to verify the misfire is resolved.