Fendt 1E.1.7C – A051 - ECU, engine control unit (EDC 7): Short circuit or break in wiring to injector valve 1

An electrical fault (either an open circuit/cable break or a short circuit) in the circuit controlling the fuel injector for cylinder 1, resulting in an injection failure (cylinder shut-off or misfire).

• 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
• 200 V/F/P Vario
• 309
• 310
• 311
• 312
• 400 Vario Series
• 700 Vario Series
• 800 Vario Series
• 922
• 924
• 927
• 930
• 933
• 936

1. 1

   Use the Fendt SERDIA diagnostic software to read specific sub-codes (typically FC 00A0 or 009F).

2. 2

   Visually inspect the wiring harness from the A051 (EDC 7) control unit to Injector Valve 1 (Y095) for chafed wires, melted insulation, or a disconnected plug.

3. 3

   Disconnect the electrical connector at Injector 1 and measure the resistance across the injector pins using a multimeter (a healthy injector should read approximately 0.5 ohms).

4. 4

   Test the harness for continuity from the injector plug back to the EDC 7 pins, ensuring there is no short to ground or short to battery voltage.

1. 1

   Disconnect Power

   Disconnect the tractor's battery before performing electrical repairs or unplugging the EDC 7 module.

2. 2

   Repair Wiring

   If the diagnostic checks reveal a broken wire or short in the harness between the A051 ECU and the Y095 injector, repair the damaged section of the harness or replace the injector sub-harness.

3. 3

   Replace Injector

   If the wiring tests good but the injector fails the resistance test (internal short or open circuit): Clean the area around the injector thoroughly to prevent debris from entering the cylinder or fuel system. Remove the high-pressure fuel lines and the injector hold-down clamp. Remove the faulty injector. Install the new injector using new O-rings and sealing washers. Torque the injector hold-down according to the specific Deutz engine spec (e.g., 23 Nm for the Deutz TCD 2013 L6 4V).

4. 4

   Clear Faults

   Reconnect the battery. Connect the SERDIA diagnostic tool and delete the error code from the A051 ECU memory. Run the engine to verify the misfire is resolved.