Fendt 8.3.26 – Rear EPC (Electronic Power Control) module / EPC OBE (On-Board Electronics) ECU: External position sensor for rear power lift — Signal line fault.

The sensor is out of position or there is an electrical fault (such as a short circuit or broken wire) on the sensor's signal line. As a safety consequence, the electrohydraulic power lift control is immediately terminated and locked.

• 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
• Farmer 409 Vario
• Farmer 410 Vario
• Farmer 411 Vario
• Farmer 412 Vario
• Favorit 711 Vario
• Favorit 712 Vario
• Favorit 714 Vario
• Favorit 715 Vario
• Favorit 716 Vario
• Favorit 717 Vario
• 815 Vario
• 817 Vario
• 818 Vario
• 822 Vario
• 824 Vario
• Favorit 916 Vario
• Favorit 920 Vario
• Favorit 924 Vario
• Favorit 926 Vario
• Favorit 930 Vario

1. 1

   Check Pin 9 on the EPC OBE ECU (A014), which corresponds to the external sensor

2. 2

   Test the wiring harness for a short-circuit in the positive supply voltage

3. 3

   Check for a cable break in the earth (ground) connection or the signal line

4. 4

   Verify if the sensor was connected or disconnected while powered, which can trigger this code and lock the system

1. 1

   Power Down

   Turn off the tractor ignition to prevent accidental voltage spikes to the EPC module.

2. 2

   Locate the Sensor

   Locate the external position sensor on the rear power lift assembly (EHR lift arms).

3. 3

   Inspect the Harness

   Disconnect the sensor and visually inspect the connector pins for corrosion, moisture, or pushed-out pins.

4. 4

   Test the Wiring

   Using a multimeter, trace the wiring from the sensor connector back to Pin 9 on the A014 ECU. Verify continuity on the signal line, ensure the ground wire has a solid connection to the chassis/ECU ground, and ensure the signal line is not shorted to the power supply wire.

5. 5

   Replace the Sensor

   If the wiring harness passes all tests, the sensor itself has failed internally or is physically broken/out of position. Remove the mounting hardware, extract the old sensor, and install the new replacement sensor.

6. 6

   Clear and Test

   Reconnect the harness, turn on the ignition, and clear the stored fault codes. Test the rear power lift using the external pushbuttons to verify the control lock has been lifted and full functionality is restored.