John Deere ECU000970.31 – ECU: Key Authentication or Control Unit Authentication Failed

The system has detected a failure in key authentication or control unit authentication. As a result, the engine control unit has commanded an engine shutoff. This issue may prevent the engine from starting or operating properly.

1. 1

   Vehicle key

2. 2

   Engine control unit

3. 3

   Key authentication system

1. 1

   Verify

   Check that the vehicle key is correct and properly inserted into the ignition.

2. 2

   Reset

   Place the key in the OFF position to reset the system.

3. 3

   Restart

   Attempt to restart the engine to see if the system recovers.