Fendt 01.1.35 – A077 - Immobiliser ECU / B083 - Immobiliser control unit: B083 - Immobiliser control is in "ready for teach-in" mode, A051 (EDC) is not.

The immobiliser control unit (B083) is in a state waiting to be programmed or synchronized ("ready for teach-in" mode), but the Engine Control Unit (EDC) is not in the corresponding teach-in state. This communication mismatch prevents the vehicle from starting. This condition typically occurs if the immobiliser control unit or the engine control unit has been recently replaced or if the system has lost its activation programming.

• 922 Vario COM III
• 924 Vario COM III
• 927 Vario COM III
• 930 Vario COM III
• 933 Vario COM III
• 936 Vario COM III
• 300 Vario (COM III)
• 409 Vario (COM III)
• 410 Vario (COM III)
• 411 Vario (COM III)
• 412 Vario (COM III)
• 711 Vario (COM III)
• 712 Vario (COM III)
• 714 Vario (COM III)
• 715 Vario (COM III)
• 716 Vario (COM III)
• 717 Vario (COM III)
• 815 Vario (COM III)
• 817 Vario (COM III)
• 818 Vario (COM III)
• 916 Vario (COM III)
• 919 Vario (COM III)
• 920 Vario (COM III)
• 922 Vario (COM III)
• 924 Vario (COM III)
• 925 Vario (COM III)
• 926 Vario (COM III)
• 927 Vario (COM III)
• 928 Vario (COM III)
• 930 Vario (COM III)
• 931 Vario (COM III)
• 933 Vario (COM III)
• 934 Vario (COM III)
• 936 Vario (COM III)

1. 1

   Verify if the engine control unit (EDC) or the immobiliser control unit was recently replaced, as this is the primary trigger for the 'ready for teach-in' mismatch.

2. 2

   Check for other active immobiliser codes (such as 01.1.30 for no key taught in, 01.1.31 for invalid transponder data, or 01.1.32 for key without transponder) to rule out a basic ignition key failure.

3. 3

   Inspect the B083 immobiliser control unit (located in the cab, on the left side of the steering column behind the panel) and check the separation point/connector (X1494) for physical damage or loose connections.

1. 1

   Connect diagnostic tool

   Connect the FENDIAS diagnostic tool to the tractor.

2. 2

   Navigate to calibration menu

   Navigate to the "Setting and calibrating" menu for the electrical system/starter lockout.

3. 3

   Teach in vehicle key

   If new keys are being introduced, execute the procedure: "Teaching in the vehicle key".

4. 4

   Synchronize modules

   Execute the specific calibration procedure: "Teach in the B083 immobiliser control unit and/or A051 ECU, engine control unit". This will synchronize the immobiliser control unit with the engine control unit so both exit the teach-in mode.

5. 5

   Clear codes and test

   Clear the stored fault codes and cycle the ignition to confirm the engine starts successfully.