Fendt 18.1.4C – A050 - ECU, basic control unit: A050 - ECU, basic control unit

Invalid settings (BSAC) for the controller in the EEPROM. This indicates an internal memory error where the stored parameters or settings within the control unit's EEPROM have become corrupted or are recognized as invalid.

• 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
• 309 Vario COM III
• 310 Vario COM III
• 311 Vario COM III
• 312 Vario COM III
• 400 Vario COM III
• 700 Vario COM III
• 800 Vario COM III
• 900 Vario COM III

1. 1

   Verify if the fault is currently active via the multiple display terminal and attempt to clear the fault memory in the A007 Instrument panel.

2. 2

   Check for accompanying CAN bus faults (e.g., EDC or terminal bus faults) that might indicate a wiring harness issue or voltage drop rather than an internal EEPROM failure.

3. 3

   Verify the A050 ECU power supply is receiving proper voltage (12 to 14 VDC) and has a clean ground connection to rule out voltage spikes or drops causing memory corruption.

1. 1

   Connect Diagnostic Tool

   Connect a laptop with the official FENDIAS diagnostic software to the tractor's diagnostic port.

2. 2

   Perform EOL Programming

   Perform EOL (End of Line) programming to re-flash the basic control unit and rewrite the correct factory parameters and calibration settings to the EEPROM.

3. 3

   Re-calibrate Systems

   After EOL programming, re-teach specific tractor functions (like transmission calibration or suspension settings) depending on what data was lost.

4. 4

   Module Repair/Replacement

   If the FENDIAS software cannot communicate with the A050 ECU, or if the EOL programming fails to write to the EEPROM (indicating physical hardware failure), remove the A050 Basic Control Unit and either send it to a specialized agricultural electronics repair facility or replace it entirely.