Fendt 8.3.19 – Rear EPC (Electrohydraulic Power Control): S028 - "Lower" rear power lift external pushbutton, cab, right rear

Signal line fault / Button faulty. The control for the rear power lift is barred and locked. External valve actuation is no longer possible, meaning the rear external controls will not work.

• 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 400 series (409, 410, 411, 412)
• Favorit 700 series (711, 712, 714, 716)
• Favorit 900 series (916, 920, 924, 926, 930)
• Fendt 300 Vario
• Fendt 400 Vario
• Fendt 700 Vario
• Fendt 800 Vario
• Fendt 900 Vario
• Fendt Vario COM III generations

1. 1

   Inspect the S028 button on the right rear fender/cab pillar for physical damage, sticking contacts, or water/dirt ingress.

2. 2

   Inspect the plug connection at the switch (AMP Superseal 3 x 1.5 connector) for corrosion, moisture, or loose pins.

3. 3

   Test the wiring harness between the S028 switch and the Rear EPC module for continuity, looking for an open circuit or short circuit to ground/power.

1. 1

   Power Down

   Turn off the tractor ignition and ensure the rear power lift area is clear and safe.

2. 2

   Access the Switch

   Locate the S028 "Lower" pushbutton on the right rear exterior of the cab/fender.

3. 3

   Disconnect and Test

   Unplug the AMP Superseal connector from the back of the switch. Use a multimeter to test the switch for proper momentary continuity when pressed.

4. 4

   Replace or Repair

   If the switch fails the continuity test or is physically stuck, remove the mounting nut (usually 30mm) and replace the switch. If the switch tests good, trace the wiring harness back to the ECU to locate and repair the break or chafe in the signal line.

5. 5

   Clear Codes

   Once the repair is made, turn the ignition ON. You may need to clear the stored fault code using the tractor's terminal or the FENDIAS diagnostic tool to unlock the EPC controls.