Fendt 0A.1.A2 – A050 - ECU, basic control unit: More valves connected than registered via EOL programming

A configuration mismatch regarding the tractor's Auxiliary control units. The system has detected that there are more physical hydraulic control valves on the CAN bus network than it has been programmed to recognize.

• 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)
• 409 Vario (COM III)
• 410 Vario (COM III)
• 411 Vario (COM III)
• 412 Vario (COM III)
• 413 Vario (COM III)
• 414 Vario (COM III)
• 415 Vario (COM III)
• 700 Vario (COM III)
• 711 Vario (COM III)
• 712 Vario (COM III)
• 714 Vario (COM III)
• 716 Vario (COM III)
• 718 Vario (COM III)
• 800 Vario (COM III)
• 815 Vario (COM III)
• 817 Vario (COM III)
• 818 Vario (COM III)
• 820 Vario (COM III)
• 900 Vario (COM III)
• 916 Vario (COM III)
• 920 Vario (COM III)
• 922 Vario (COM III)
• 924 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

   Verify the actual number of auxiliary control valves physically installed on the tractor (e.g., Y071, Y072, Y074, Y075, Y076, Y078).

2. 2

   Connect the FENDIAS diagnostic tool (SERDIA) and check the EOL (End-Of-Line) programming configuration in the A050 basic control unit to see how many valves are currently registered.

3. 3

   If no new valves were recently added, inspect the wiring harness and CAN bus connections to the auxiliary control valves for short circuits or a malfunctioning valve module broadcasting an incorrect ID.

1. 1

   Update EOL programming

   If a valve was recently added, use the FENDIAS diagnostic tool to update the EOL programming in the A050 ECU. Register the correct number of auxiliary control valves so the software matches the physical hardware.

2. 2

   Repair wiring

   If no valve was added (Wiring Fault), repair any damaged wiring or CAN bus lines that are causing the false detection.

3. 3

   Replace faulty valve section

   If the wiring is intact and no valve was added (Hardware Fault), one of the existing auxiliary control valves may have an internal electronic failure causing it to broadcast an incorrect or duplicate ID. Identify the faulty valve section via FENDIAS and replace it.

4. 4

   Clear codes

   Once the EOL programming is updated or the hardware is repaired, use the tractor's onboard diagnostic menu or the FENDIAS tool to confirm, call up, and delete the stored fault code.