Fendt 1E.1.B1 – A051 - ECU, engine control unit (EDC 7): CAN message, no control function mode

The tractor's CAN bus network is missing a critical communication message regarding the engine's control function mode. This typically points to a communication breakdown, wiring issue, or software/hardware fault within the engine control module.

• 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
• Fendt 309 Vario COM III
• Fendt 310 Vario COM III
• Fendt 311 Vario COM III
• Fendt 312 Vario COM III
• Fendt 411 Vario COM III
• Fendt 412 Vario COM III
• Fendt 413 Vario COM III
• Fendt 414 Vario COM III
• Fendt 415 Vario COM III
• Fendt 711 Vario COM III
• Fendt 712 Vario COM III
• Fendt 714 Vario COM III
• Fendt 716 Vario COM III
• Fendt 815 Vario COM III
• Fendt 817 Vario COM III
• Fendt 818 Vario COM III
• Fendt 820 Vario COM III
• Fendt 919 Vario COM III
• Fendt 922 Vario COM III
• Fendt 924 Vario COM III
• Fendt 925 Vario COM III
• Fendt 927 Vario COM III
• Fendt 928 Vario COM III
• Fendt 930 Vario COM III
• Fendt 933 Vario COM III
• Fendt 936 Vario COM III

1. 1

   Inspect the CAN bus communication lines between the A051 (EDC 7) engine control unit and the A002 (enhanced control) / A050 (basic control) units (refer to the 'EDC control' circuit diagram Sheet 21 or Sheet 36).

2. 2

   Check the main harness connectors at the A051 ECU for water ingress, oil contamination, bent pins, or corrosion.

3. 3

   Verify if the ECU has lost its parameterization (e.g., a checksum error or missing EOL programming).

1. 1

   Connect Diagnostic Tool

   Connect a laptop with FENDIAS or SERDIA (Deutz/Bosch diagnostic software) to the tractor's diagnostic port.

2. 2

   Verify Code

   Read the fault memory to confirm the presence of code 1E.1.B1 (Internal FC:005F).

3. 3

   Perform Wiring Repairs

   If the diagnostic checks revealed high resistance, shorts, or breaks in the CAN wiring harness leading to the A051 ECU, repair or replace the affected wiring sections.

4. 4

   ECU Reprogramming/Replacement

   If the wiring is intact, the EDC 7 module itself may have suffered an internal failure or software corruption. Attempt an EOL (End of Line) reprogramming. If the unit will not take the programming, the A051 ECU must be removed and either sent to a specialist for repair/cloning or replaced entirely.

5. 5

   Clear Faults

   Once the physical repair or module replacement is complete, use the SERDIA software to explicitly delete the error code (FC:005F) from the A051 memory. (Note: Canceling the code on the tractor's dashboard terminal only hides it; it must be cleared from the EDC via software).

6. 6

   Test Run

   Restart the tractor and verify that the engine control functions operate normally and the code does not return.