Fendt 01.1.07 – Engine Control Unit (A051 / A169): Checksum engine parameter incorrect / Incorrect engine parameters

This fault code indicates a data integrity issue within the engine control unit's memory. Specifically, the checksum for the engine parameters does not match the expected value. When this code is active, the tractor will typically limit torque and restrict operations, though travel in emergency mode is still possible.

• 309 Vario COM III
• 310 Vario COM III
• 311 Vario COM III
• 312 Vario COM III
• 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
• Fendt 409
• Fendt 410
• Fendt 411
• Fendt 412
• Fendt 711
• Fendt 712
• Fendt 714
• Fendt 716
• Fendt 815
• Fendt 817
• Fendt 818
• Fendt 916
• Fendt 920
• Fendt 922
• Fendt 924
• Fendt 926
• Fendt 927
• Fendt 930
• Fendt 936

1. 1

   Verify Emergency Mode: Confirm the tractor can still drive in emergency mode. If the tractor does not move at all, there may be secondary CAN bus communication faults (such as a G-bus interruption) preventing the transmission of data between the basic control unit (A050) and the engine ECU (A051).

2. 2

   Check for Accompanying Codes: Look for related codes like 01.1.08 (Checksum of Power Boost parameter incorrect) or 01.1.A0 (Wrong engine control unit / wrong EOL programming), which further point to software corruption.

3. 3

   Wiring & Voltage: Ensure the ECU is receiving stable voltage. Voltage spikes or drops during starting can sometimes cause memory corruption leading to checksum errors.

1. 1

   Connect Diagnostic Tool

   Connect the FENDIAS diagnostic interface (or Deutz SERDIA tool) to the tractor's diagnostic port.

2. 2

   Perform EOL Programming

   Perform EOL (End of Line) programming to rewrite the correct engine parameters and data records to the ECU, correcting the checksum mismatch.

3. 3

   Clear Codes

   Once the EOL programming is complete, cycle the key and clear the stored fault codes.

4. 4

   ECU Replacement (If EOL Fails)

   If the ECU refuses to accept the EOL programming or the memory chip is physically damaged, the A051 (EDC 7) module must be replaced. The replacement unit will need to be cloned from the original or virginized and programmed to match the tractor's immobilizer (A077) and engine configuration.