John Deere 000629.13 – ECU: ECU Boot Block Error

The Engine Control Unit (ECU) has detected an internal memory problem, often referred to as an ECU Boot Block Error or Programming Error. This typically occurs due to a corrupted software payload, a failed or interrupted reprogramming attempt, or a physical fault within the ECU's internal memory. This condition may prevent the engine from starting.

• 6M-1654
• 6M-1854
• 6M-2104
• 7710
• 7720
• 7810
• 7820
• 7920
• 8120
• 8130
• 8220
• 8320
• 8320R
• 8320RT
• 8420
• 8520
• 8310RT
• 8335RT
• 8360RT
• 3029 Engine
• 4045 Engine
• 6068HF485 Engine
• 640G-III Skidder
• 648G-III Skidder
• 460D Skidder
• 330G
• 331G
• 332G
• 333G
• Forwarders with a 6068 HF 485 engine

1. 1

   Turn the key switch to the ON position without starting the engine.

2. 2

   Using a diagnostic tool, clear and refresh the Diagnostic Trouble Codes (DTCs).

3. 3

   Disconnect the diagnostic tool.

4. 4

   Turn the key switch to the OFF position.

5. 5

   Wait for five minutes.

6. 6

   Turn the key switch back to the ON position, again without starting the engine.

7. 7

   Reconnect the diagnostic tool to see if the fault code reappears.

1. 1

   Reprogram the ECU

   If the code persists after a reset, have a John Deere dealer reprogram the ECU with the latest software payload using John Deere Service ADVISOR software.

2. 2

   Replace the ECU

   If reprogramming is unsuccessful, the ECU's internal memory is permanently faulty and the module must be replaced.