Fendt 4.1.EC – TRANSMISSION: Specified engine speed rotary position sensor ('accelerator pedal') combi-sensor (B029, B038, or B055)

Accelerator rotary control values are not within tolerances, have drifted, or there is no calibration of the accelerator rotary control, causing the tractor to enter a restricted operating mode.

• 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
• Fendt 300 Vario (COM III)
• Fendt 400 Vario / Farmer 400 (409, 410, 411, 412, 413, 414, 415)
• Fendt 700 Vario / Favorit 700 (711, 712, 714, 716, 718)
• Fendt 800 Vario (815, 817, 818)
• Fendt 900 Vario / Favorit 900 (916, 920, 924, 926, 930, 933, 936, 939)

1. 1

   Check the mechanical linkage between the accelerator pedal and the rotary position sensor for binding, damage, or excessive play.

2. 2

   Inspect the wiring harness for discontinuities, short circuits, or voltage supply failures. Check the connectors at the pedal position sensors (B029, B038, B055) and at the EST (A002) and EDC (A021) control modules.

3. 3

   Test electrical values for B029 (EST Sensor) at EST Control Module A002 (Pin 7, Connector X031): Idle Position should be 16 mA - 22 mA, Full Power Position should be 2 mA - 8 mA.

4. 4

   Test electrical values for B038 (EDC Sensor) at EDC Control Module A021 (Pin B23, Connector X048): Idle Position should be 0.3 V - 0.6 V, Full Power Position should be 4.0 V - 4.5 V.

1. 1

   Adjust Linkage

   Attempt to adjust the mechanical linkage between the pedal and the sensor to bring the electrical values back within the specified tolerances.

2. 2

   Replace Sensor

   If adjustment is not feasible or the sensor is internally shorted/drifted beyond recovery, replace the accelerator pedal position combi-sensor.

3. 3

   Recalibrate

   After replacing or adjusting the sensor, perform TRANSMISSION calibration code '4005' via the tractor's terminal/diagnostic system to teach the ECU the new sensor end-stops.

4. 4

   Clear Codes

   Clear the stored fault codes from the memory using the terminal or FENDIAS diagnostic tool.