Fendt A.1.C6 - A.1.CA – A004 module: A004 Control console CAN-bus fault

Malfunctions which cannot be further specified. Indicates that the tractor's CAN bus network has lost communication with the control console, or the console is sending invalid data/status changes that the system cannot recognize. Functions tied to the console may be locked or ignored.

• 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
• Farmer 410
• Farmer 411
• Farmer 412
• Favorit 711
• Favorit 712
• Favorit 714
• Favorit 715
• Favorit 716
• Favorit 717
• Favorit 916
• Favorit 920
• Favorit 924
• Favorit 926
• Favorit 930
• 300 Vario (COM III)
• 400 Vario (COM III)
• 700 Vario (COM III)
• 800 Vario (COM III)
• 900 Vario (COM III)

1. 1

   Check Power Supply: Check the printed circuit board / fuse board A013, specifically inspecting fuses F040 and F041 for a loss of voltage supply to the CAN bus.

2. 2

   Inspect CAN Connections: Check for line discontinuity or a faulty CAN connection between the A004 Control console and the A002 module (ECU, enhanced control).

3. 3

   Check for Shared Bus Failures: Determine if other modules (like the A008 Vario Terminal or A009 Transmission control unit) are also dropping offline, which would point to a broader CAN bus wiring issue rather than an isolated A004 failure.

1. 1

   Fuse Replacement

   Locate fuse board A013. If fuses F040 or F041 are blown, replace them and test the system to see if communication is restored.

2. 2

   Wiring Harness Repair

   Access the A004 Control console by removing the panel on the right mudguard inside the cab. Disconnect the electrical couplers and inspect the pins for corrosion, moisture, or damage. Repair any broken wires in the CAN bus harness leading to the console.

3. 3

   Module Replacement/Repair

   If the wiring and power supply are intact but the fault persists, the internal ECU of the A004 Control console has failed. The console must be removed and either sent to a specialized electronics repair facility or replaced entirely.

4. 4

   Reprogramming

   If a new or refurbished A004 console is installed, you must run a new EOL (End of Line) programming procedure using the FENDIAS diagnostic tool to configure the module to the tractor's specific chassis and valve setup.