Fendt 0B.1.B0 – A050 - Basic Control Unit ECU (EXT): A050 - ECU, basic control unit TEACH-IN

A CAN communication Teach-In initialisation error where the basic control unit failed to initialize the Teach-In function over the CAN bus network.

• 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 900 Vario (COM III)
• 700 SCR
• 800 SCR
• 900 SCR

1. 1

   Check the wiring harness and connectors leading to the A050 Basic Control Unit for corrosion, backed-out pins, or moisture.

2. 2

   Verify the power (+UB) and ground connections at the A050 ECU (e.g., separation points X169 and X1403) to ensure the module is receiving stable voltage during startup.

3. 3

   Scan for other active CAN bus or terminal communication errors (such as 0B.1.11, 0B.1.21, or 0B.1.22) which might indicate a broader network failure rather than an isolated A050 module failure.

1. 1

   EOL Programming

   Connect the FENDIAS diagnostic tool and re-flash/re-program the A050 Basic Control Unit.

2. 2

   Sequence Deletion

   If the error persists or is accompanied by code 0B.1.B1 (Saving or read-out error in sequence data), delete the existing Teach-In sequences from the terminal and reprogram them.

3. 3

   Module Repair/Replacement

   If EOL programming fails and the CAN wiring is intact, the A050 Basic Control Unit has suffered an internal hardware/EEPROM failure and must be repaired or replaced.