Fendt 1.1.01 – EDC / EMR: B038 or B055 - EDC / EMR foot throttle rotary position sensor (yellow), combi-sensor

The system has detected that the signal from the accelerator pedal position sensor is either too high, too low, or missing entirely for longer than 2000 milliseconds (2 seconds).

• 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
• 411 Vario COM III
• 412 Vario COM III
• 413 Vario COM III
• 414 Vario COM III
• 415 Vario COM III
• 712 Vario COM III
• 714 Vario COM III
• 716 Vario COM III
• 718 Vario COM III
• 818 Vario COM III
• 820 Vario COM III
• 300 Vario series (COM III)
• 815 Vario
• 817 Vario
• 818 Vario

1. 1

   Check Fuse 26 and verify the 8.5V power supply to the sensor

2. 2

   Inspect the wiring harness and connectors between the pedal position sensor (B038/B055) and the EDC Control Module (A021) for discontinuities, short circuits, or damaged pins

3. 3

   Check the sensor voltage using an adaptor box at the EDC Control Module A021 (Pin B23, Connector X048). Idle position should be 0.3 - 0.6 V; full power position should be 4.0 - 4.5 V

4. 4

   Inspect the mechanical linkage between the foot pedal and the rotary sensor for wear, binding, or misalignment

5. 5

   Verify if the sensor has drifted out of its calibrated range (a deviation greater than 400 RPM between requested and actual values can trigger this code)

1. 1

   Disconnect battery

   Turn the ignition "OFF" and disconnect the battery to ensure safety while working on the electrical system.

2. 2

   Locate sensor

   Locate the B038/B055 foot throttle rotary position sensor (marked with a yellow identifier) on the accelerator pedal assembly.

3. 3

   Inspect and clean connector

   Disconnect the sensor's electrical connector and inspect for corrosion or pushed-out pins. Clean or repair the connector if necessary.

4. 4

   Adjust mechanical linkage

   Attempt to adjust the mechanical linkage between the pedal and the sensor to bring the voltage back into the specified range (0.3V - 0.6V at idle).

5. 5

   Replace sensor

   If adjustment is not feasible, or if the sensor has an internal open/short circuit, remove the mounting hardware and replace the rotary position sensor.

6. 6

   Reconnect electrical harness

   Reconnect the electrical harness and restore battery power.

7. 7

   Perform sensor calibration

   Perform the sensor calibration procedure using the tractor's terminal or diagnostic tool. The calibration code for the foot throttle sensor is 4005.

8. 8

   Clear codes and test drive

   Clear the fault codes and test drive the tractor to ensure full throttle response is restored and the code does not return.