Fendt 4.1.36 – twin e-box: Rear PTO automatic' key on membrane keypad — Signal fault

The electronic control system is receiving an invalid signal, no signal, or a double-actuation signal from the button responsible for the Rear PTO automatic mode on the tractor's membrane keypad, causing the function to be disabled.

• 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
• Fendt Vario
• Favorit 900 (FAV900) series

1. 1

   Inspect the membrane keypad on the multifunction armrest/console for physical damage, tears, or a collapsed/sticking 'Rear PTO automatic' button.

2. 2

   Use the FENDIAS diagnostic tool to monitor the live input state of the membrane keypad to see if the key registers as permanently pressed or fails to register.

3. 3

   Access the back of the membrane keypad and check the wiring harness and connector linking it to the e-box for loose pins, corrosion, or chafed wires.

1. 1

   Power down and disconnect battery

   Power down the tractor and disconnect the battery to prevent electrical shorts.

2. 2

   Remove retaining trim/bezel

   Carefully pry or unscrew the retaining trim/bezel surrounding the membrane keypad on the multifunction armrest or side console.

3. 3

   Disconnect keypad module

   Lift the keypad module and disconnect the multi-pin electrical connector from the rear.

4. 4

   Apply repair kit (if applicable)

   If using a membrane keypad repair kit, carefully peel off the defective membrane sticker layer, clean the contact surface with electrical contact cleaner, and apply the new membrane keypad overlay.

5. 5

   Replace keypad module (if applicable)

   If replacing the entire keypad module, swap the old unit for the new one.

6. 6

   Reconnect electrical harness

   Reconnect the electrical harness, ensuring the connector seats firmly and locks.

7. 7

   Reinstall keypad

   Reinstall the keypad into the console and secure the trim.

8. 8

   Reconnect battery and clear codes

   Reconnect the battery, turn the ignition on, and clear the fault codes using the diagnostic tool.

9. 9

   Test function

   Test the Rear PTO automatic button to verify the function is restored and the fault code does not return.