Fendt 02.1.EE – A050 - ECU, basic control unit: A050 - ECU, basic control unit. Error message on ISO job computer

This code indicates a communication fault or internal error message originating from the ISOBUS (ISO job computer) that is being reported to the tractor's main basic control unit.

• 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 300 Vario (COM III)
• Fendt 400 Vario (COM III) (e.g., 409, 410, 411, 412)
• Fendt 700 Vario (COM III) (e.g., 711, 712, 714, 716)
• Fendt 800 Vario (COM III) (e.g., 815, 817, 818)
• Fendt 900 Vario (COM III) (e.g., 916, 920, 922, 924, 927, 930, 933, 936)

1. 1

   Inspect the ISOBUS implement connector at the rear of the tractor for dirt, corrosion, or bent pins

2. 2

   Verify the integrity of the CAN bus communication lines between the ISO job computer and the A050 ECU

3. 3

   Test the A050 basic control unit using the Fendt 160-pin adapter box to verify pin voltages and signals

4. 4

   Read and clear fault memory using the FENDIAS diagnostic software, as codes in the A050 ECU cannot be deleted via the dashboard terminal (A007)

1. 1

   Clear and Verify

   Connect the FENDIAS diagnostic tool, clear the 02.1.EE fault code, and cycle the ignition. If the code does not return, it may have been a transient communication glitch with an implement.

2. 2

   Harness Inspection

   If the code is hard-set, trace the wiring harness from the ISOBUS connector to the A050 ECU. Repair any chafed wires or damaged connectors.

3. 3

   ECU Repair/Replacement

   If the wiring is intact and the ISO job computer is functioning properly, the A050 ECU may have suffered an internal failure. The unit must be removed and either sent to a specialized agricultural electronics repair service or replaced with a new unit.

4. 4

   EOL Programming

   If the A050 basic control unit is replaced, you must perform EOL (End of Line) programming using FENDIAS. The new ECU must be synchronized with the tractor's specific configuration and the A077 Immobilizer ECU.