Fendt 07.1.E3 – A050 - ECU, basic control unit: Checksum error, PW of front PTO

A software checksum error within the basic control unit regarding the pulse width (PW) parameters for the front Power Take-Off (PTO). The system cannot verify the programmed parameters and automatically reverts to using default values as a safety consequence.

• 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 V/F/P Vario series (207, 208, 209, 210, 211)
• 300 Vario (COM III)
• 400 Vario (COM III)
• 700 Vario (COM III / SCR)
• 800 Vario (COM III / SCR)
• 900 Vario (COM III / SCR)
• 916
• 920
• 922
• 924
• 927
• 930
• 933
• 936

1. 1

   Verify front PTO operation to see if it engages and operates on default safe base values.

2. 2

   Check for accompanying A050 memory faults (such as EEPROM read/write errors or RAM tests) which may indicate physical memory failure.

3. 3

   Verify CAN communication and ensure there are no underlying voltage drops or CAN bus errors to the A050 ECU.

1. 1

   Connect diagnostic tool

   Connect the AGCO 2x4 CANUSB Diagnostic Tool to the tractor's diagnostic port.

2. 2

   Launch software

   Launch the FENDIAS diagnostic software.

3. 3

   Establish communication

   Establish communication with the A050 - ECU, basic control unit.

4. 4

   Execute EOL programming

   Navigate to the programming section and execute the EOL programming procedure for the front PTO. This will rewrite the correct pulse width parameters and recalculate the checksum.

5. 5

   Clear fault codes

   Clear the fault codes from the A050 memory.

6. 6

   Test PTO engagement

   Cycle the tractor's ignition and test the front PTO engagement to verify the fault code does not return.

7. 7

   Repair or replace ECU

   If the A050 ECU refuses to accept the EOL programming or drops the programming again after a battery cycle, the ECU's internal EEPROM is likely defective, and the A050 module will need to be repaired or replaced.