Fendt 4.1.06 (EDC or EMR) – Transmission Control Unit and Engine Control Unit (EDC or EMR): EST foot throttle rotary position sensor / combi-sensor signal fault

The signal from the foot throttle position sensor is too high, too low, or absent for more than 2 seconds, indicating a discrepancy, plausibility error, or complete loss of communication.

• 409 Vario
• 410 Vario
• 411 Vario
• 412 Vario
• 711 Vario
• 712 Vario
• 714 Vario
• 715 Vario
• 716 Vario
• 717 Vario
• 718 Vario
• 916 Vario
• 920 Vario
• 924 Vario
• 926 Vario
• 930 Vario
• Farmer 400 Vario
• Favorit 700 Vario
• Favorit 900 Vario (from chassis number 23/3001)
• 300 Vario (COM III)
• 400 Vario (COM I, II, III)
• 700 Vario (COM I, II, III)
• 800 Vario (COM I, II, III)
• 900 Vario (COM I, II, III)

1. 1

   Check the 8.5V power supply from the A013 circuit board (specifically fuse 14, 17, or 19 depending on the tractor series)

2. 2

   Inspect the EDC and Transmission control wiring for line discontinuities, corrosion, or shorts between the B029/B055 sensor and the A050/A051 control units

3. 3

   Check the terminal to see if the system is requesting a calibration (frequently associated with calibration code 4005)

1. 1

   Secure the Tractor

   Apply the hand brake and turn the ignition ON.

2. 2

   Verify Fuses and Wiring

   Locate the A013 circuit board and test the relevant 8.5V fuse (Fuse 14, 17, or 19). Repair any damaged wiring between the foot pedal and the ECU.

3. 3

   Replace the Sensor

   If the power supply and wiring are intact but the signal fault persists, replace the B029/B055 foot throttle sensor or the entire accelerator pedal assembly. Remove the bottom right steering column cover to access it.

4. 4

   Clear Faults

   Using the tractor's terminal, press and hold the confirm button to clear the active error messages.

5. 5

   Calibrate the New Sensor

   Perform an End-Of-Line (EOL) calibration for the new foot throttle/throttle pedal by entering calibration code 4005 into the terminal to calibrate the B055/B029 sensor to the Tractor Management System.