Fendt 1.2.72 – A051 - ECU, Engine Control Unit (EDC 7): Start of the injection period in cylinder 3 is outside the setpoint range or is absent

The engine control unit has detected that the fuel injection timing for the third cylinder is incorrect, or the injector is failing to fire entirely.

• 411 Vario COM III
• 412 Vario COM III
• 413 Vario COM III
• 414 Vario COM III
• 415 Vario COM III
• 712 Vario COM III
• 714 Vario COM III
• 716 Vario COM III
• 718 Vario COM III
• 818 Vario COM III
• 820 Vario COM III
• 309 Vario COM III
• 310 Vario COM III
• 311 Vario COM III
• 312 Vario COM III
• 916 Vario COM III
• 919 Vario COM III
• 920 Vario COM III
• 922 Vario COM III
• 924 Vario COM III
• 925 Vario COM III
• 926 Vario COM III
• 927 Vario COM III
• 930 Vario COM III
• 933 Vario COM III
• 936 Vario COM III

1. 1

   Check the wiring harness and connectors running between the EDC 7 control unit (A051) and the cylinder 3 fuel injector for short circuits, cable breaks, or loose/corroded pins.

2. 2

   Check the cylinder 3 fuel injector for obvious mechanical or electrical damage.

3. 3

   Verify overall fuel system condition, including fuel pressure and filters, to ensure the injector is receiving adequate fuel.

4. 4

   If accompanied by a misfire code (e.g., 1.2.63 / FC:0028 for cylinder 3 misfire), check the engine mechanics such as valves and pistons, or perform a compression test.

1. 1

   Resolve Wiring Issues

   If a break or short is found in the harness between the A051 ECU and the cylinder 3 injector, repair or replace the damaged wiring.

2. 2

   Replace the Injector

   If the wiring tests fine, the cylinder 3 fuel injector is likely faulty and must be replaced. (Note: It is often recommended by fuel system manufacturers to replace the entire set of injectors to ensure optimal engine performance and balanced atomization, though replacing just the faulty one will resolve the immediate code).

3. 3

   Clear the Fault Code

   You must use the Fendt SERDIA diagnostic software to permanently delete the error from the EDC 7 memory (Internal SERDIA Fault Code: 001A). Canceling the fault code on the tractor's terminal display only hides it from the screen.