Fendt 3.1.06 – A004 - Control Console: A004 - ECU, control panel

External 8.5 V fault (8.5 Volt supply failure). The fault causes the control console to shut down specific functions to protect the system. The button panel (keypad), digital/analogue inputs, and LED actuations are switched off.

• 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
• 400 Vario Series (Farmer 409, 411, 412, 415)
• 700 Vario Series (Favorit 712, 714, 716, 718)
• 800 Vario Series (815, 817, 818, 820)
• 900 Vario Series (Favorit 916, 920, 924, 926, 930)

1. 1

   Inspect CAN-Bus and console voltage supply fuses on the main fuse board (A013), specifically F040, F041, and Fuse 5.

2. 2

   Check the wiring harness between the A013 fuse board and the A004 control console for pinched wires, corrosion at connectors, or shorts to ground.

3. 3

   Perform a voltage drop test using a multimeter to verify if the 8.5V supply is reaching the A004 connector.

1. 1

   Power Down

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

2. 2

   Access the Console

   Remove the trim paneling on the right-hand mudguard/multifunction armrest to expose the A004 control console mounting hardware.

3. 3

   Disconnect

   Carefully unplug the CAN bus and power supply connectors from the bottom of the A004 ECU.

4. 4

   Remove & Replace

   Unbolt the defective control console and install the replacement (or repaired) unit.

5. 5

   Reassemble

   Reconnect the wiring harnesses, reinstall the armrest paneling, and reconnect the battery.

6. 6

   Clear Fault Codes

   Turn the ignition on. The fault code must be cleared manually. Press the return/acknowledge button on the terminal repeatedly until no more fault codes are indicated. Note: Each stored fault code must be cleared individually, or it will reappear on the next startup.

7. 7

   EOL Programming

   Depending on the tractor generation, a new A004 module may require End-of-Line (EOL) programming via FENDIAS diagnostic software to map the auxiliary control valves and buttons to your specific tractor's options.