Fendt A.1.C4 – A004 Control Console: Control console — Time function key faulty

The system has detected that the timer function membrane button's circuit on the side console is either stuck closed (shorted/held down), open, or has an internal RAM/EEPROM communication error, which disables the timer function for the spool valves.

• 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
• 400 Vario Series
• 409
• 410
• 411
• 412
• 700 Vario Series
• 711
• 712
• 714
• 716
• 800 Vario Series
• 815
• 817
• 818
• 900 Vario Series
• 916
• 920
• 924
• 926
• 930

1. 1

   Inspect the Time/Timer function button on the A004 control console for physical damage, tears in the membrane, or dirt/debris wedged around the button that might hold it in a pressed state.

2. 2

   Cycle the tractor's ignition (Key reset/restart) to see if the code clears. If the code returns immediately, the internal membrane switch is definitively faulty.

3. 3

   Briefly inspect the main CAN-bus and power harness connections at the bottom of the A004 console for loose pins or corrosion.

1. 1

   Disconnect Power

   Disconnect the tractor's battery to prevent electrical shorts or CAN-bus spikes.

2. 2

   Access the Console

   Remove the trim panels on the right-hand mudguard/armrest to expose the mounting hardware for the A004 Control Console.

3. 3

   Disconnect Harnesses

   Carefully unplug the multi-pin electrical connectors from the bottom/rear of the A004 unit.

4. 4

   Remove the Unit

   Remove the retaining screws or bolts holding the console in place and lift the unit out of the armrest.

5. 5

   Repair or Replace

   Send the A004 console to a specialized agricultural electronics repair center to replace the defective membrane keypad board, or install a brand-new A004 Control Console.

6. 6

   Reinstallation

   Seat the new/repaired console, secure the mounting screws, and plug in the electrical harnesses. Reinstall the armrest trim.

7. 7

   Calibration / EOL Programming

   Reconnect the battery. If a brand-new console was installed, use FENDIAS diagnostic software to perform EOL (End of Line) programming and calibrate the console, joystick, and auxiliary control valves to the tractor's specific configuration.