Fendt 01.1.31 – A077 - Immobiliser ECU: B083 - Immobiliser control

Invalid transponder data from ignition key. The B083 Immobiliser control detects that a key has been inserted, but the transponder chip inside the key is either missing, incorrect, or has not been programmed to the tractor's immobiliser system. As a result, the starting quantity of fuel is not released, and the engine cannot be started.

• 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 series (311, 312)
• 400 Vario series (409, 410, 411, 412)
• 700 Vario series (711, 712, 714, 716)
• 800 Vario series (815, 817, 818)
• 900 Vario series (916, 920, 924, 926, 930, 933, 936, 939, 942)

1. 1

   Verify the operator is using the correct, original ignition key equipped with a transponder chip, rather than a standard unchipped metal cut key.

2. 2

   Ensure there are no other transponder keys or magnetic objects on the same keychain causing signal interference with the B083 receiver ring.

3. 3

   Check the wiring harness and CAN bus connections between the B083 Immobiliser control, the A077 Immobiliser ECU, the A051 Engine Control Unit, and the A050 Basic Control Unit.

1. 1

   Use a Taught-in Key

   Attempt starting the tractor with a known, previously taught-in transponder key.

2. 2

   Teach in the Vehicle Key (EOL Programming)

   If all keys are lost, a new key is purchased, or the A077 Immobiliser ECU is replaced, the keys must be programmed to the tractor.

3. 3

   Connect diagnostic laptop

   Connect a diagnostic laptop with FENDIAS / SERDIA (End of Line / EOL programming software) to the tractor's transmission bus and comfort bus.

4. 4

   Read in ignition keys

   Follow the software prompts to 'Read in ignition keys.' The Fendt immobiliser system can recognize a maximum of three keys at one time.

5. 5

   ECU Synchronization

   If the A077 Immobiliser ECU or the A051 Engine ECU was replaced, the immobiliser and the engine control unit must be synchronized to recognize each other.