Fendt 1E.1.C2 – A051 - ECU, engine control unit (EDC 7): CAN bus A, break in wiring or short circuit

Communication error on the tractor's Controller Area Network. Specifically, it means: "CAN bus A, break in wiring or short circuit" (also documented as a cable break). While this fault is active, the system typically defaults to a restricted operating mode, though driving with the foot throttle/throttle pedal remains possible.

• 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
• 409 Vario COM III
• 410 Vario COM III
• 411 Vario COM III
• 412 Vario COM III
• 711 Vario COM III
• 712 Vario COM III
• 714 Vario COM III
• 716 Vario COM III
• 815 Vario COM III
• 817 Vario COM III
• 818 Vario COM III
• 916 Vario COM III
• 920 Vario COM III
• 926 Vario COM III

1. 1

   Physically inspect the wiring harness for CAN bus A leading to the A051 Engine Control Unit for chafed wires, pinched cables, or disconnected plugs.

2. 2

   Using a multimeter and the OEM 'EDC control' circuit diagram (Sheet 21 or Sheet 33), test the CAN bus A lines for continuity to rule out a cable break, and check for short circuits to ground or power.

3. 3

   Inspect the main separation points and connectors on the A051 ECU (e.g., X1466, X1671, X1672) for corrosion, moisture, or backed-out pins.

1. 1

   Isolate the battery and repair any broken or shorted wires found on the CAN bus A circuit during the diagnostic phase.

   Isolate the battery and repair any broken or shorted wires found on the CAN bus A circuit during the diagnostic phase.

2. 2

   If a connector pin is corroded or damaged, depin and replace the affected terminal, ensuring a weather-tight seal is re-established.

   If a connector pin is corroded or damaged, depin and replace the affected terminal, ensuring a weather-tight seal is re-established.

3. 3

   Reconnect the A051 ECU and restore battery power.

   Reconnect the A051 ECU and restore battery power.

4. 4

   Connect the Deutz/Fendt SERDIA diagnostic software interface to the tractor.

   Connect the Deutz/Fendt SERDIA diagnostic software interface to the tractor.

5. 5

   Navigate to the EDC engine control module and clear the stored fault (Internal SERDIA Fault Code: FC:00C0).

   Navigate to the EDC engine control module and clear the stored fault (Internal SERDIA Fault Code: FC:00C0).

6. 6

   Cycle the ignition and perform a test drive to verify that CAN bus A communication is restored and the code does not return.

   Cycle the ignition and perform a test drive to verify that CAN bus A communication is restored and the code does not return.