Fendt 1.2.0A – EDC / EMR: B035 - Sensor, hand throttle

A break in the wiring, a short circuit, or an implausible signal (too high or too low) coming from the idle/hand throttle sensor. A faulty 8.5 V supply can also trigger this fault, causing the tractor to enter a restricted operating mode.

• 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 (COM III) / Farmer 400
• Fendt 700 Vario (COM III) / Favorit 700
• Fendt 800 Vario (COM III)
• Fendt 900 Vario (COM III) / Favorit 900

1. 1

   Read sub-codes using the SERDIA diagnostic tool to identify the specific internal error (often listed as FC: 008A).

2. 2

   Check the 8.5 V power supply to the sensor, specifically verifying Fuse 26 which protects this circuit.

3. 3

   Inspect wiring and connectors for a break or short circuit between the B035 sensor and the EDC/EMR. Pay special attention to separation points (e.g., connector X183 on the right mudguard on 300 Vario models).

4. 4

   Test the sensor signal using a multimeter to verify if the potentiometer is outputting a smooth, plausible voltage sweep when the hand throttle is moved.

1. 1

   Disconnect Power

   Turn off the ignition and disconnect the battery to prevent electrical spikes.

2. 2

   Access the Sensor

   Locate the B035 hand throttle sensor inside the right-hand control console in the cab.

3. 3

   Remove the Console

   Carefully remove the control console cover panels to expose the internal switches and potentiometers.

4. 4

   Remove the Faulty Sensor

   Disconnect the electrical harness connector from the B035 hand throttle sensor. Unbolt or unclip the sensor from the throttle lever mechanism.

5. 5

   Install the New Sensor

   Mount the replacement OEM sensor into the console and reconnect the wiring harness.

6. 6

   Reassembly

   Reinstall the control console panels and reconnect the battery.

7. 7

   Clear Codes and Calibrate

   Connect the SERDIA diagnostic tool to clear the 1.2.0A (FC: 008A) fault code. Test the hand throttle to ensure the engine RPM responds correctly and the code does not return.