Fendt 00.0.06 – A050 - Basic Control Unit ECU: A050 - ECU, basic control unit: Rear PTO bus fault.

This code indicates a CAN bus communication error specifically affecting the rear Power Take-Off (PTO) system. The basic control unit is unable to communicate with the rear PTO components, resulting in a loss of function. The tractor will typically register "Functions non-operational, no display" for the rear PTO.

• 922 Vario COM III
• 924 Vario COM III
• 927 Vario COM III
• 930 Vario COM III
• 933 Vario COM III
• 936 Vario COM III
• 200 Vario series
• 300 Vario series
• 400 Vario series
• 500 Vario series
• 700 Vario series
• 800 Vario series
• 900 Vario series
• 1000 Vario series

1. 1

   Verify the voltage supply to the A050 control unit and the rear PTO circuit, as voltage drops can trigger bus errors.

2. 2

   Inspect the physical CAN bus wiring harness and connectors between the A050 basic control unit and the rear PTO sensors/actuators for corrosion, loose pins, or chafing.

3. 3

   If wiring is intact, consider an internal hardware failure of the A050 unit (bench-testing by specialized shops may be required).

4. 4

   Note that fault codes stored in the A050 Basic Control ECU can only be permanently deleted using Fendt's official FENDIAS diagnostic software.

1. 1

   Isolate the circuit

   Disconnect battery power before servicing the ECU or wiring harness.

2. 2

   Repair wiring

   If the diagnostic checks reveal damaged CAN bus lines or power supply wires to the rear PTO, repair or replace the affected harness sections.

3. 3

   Repair or replace the A050 ECU

   If the wiring is sound but the module fails to communicate, remove the A050 Basic Control Unit. You can either send it out for specialized repair or replace it with a new OEM unit.

4. 4

   Perform EOL programming

   If the A050 ECU is replaced, repaired, or wiped, you must perform EOL (End of Line) programming using the FENDIAS software to configure the module to the tractor's specific options and restore functionality.

5. 5

   Clear codes

   Clear the historical fault codes from the A050 memory using the FENDIAS diagnostic tool.