Fendt 4.1.B6 – Tractor Management System (TMS) / Enhanced Control ECU (A002): Equipment 'Neumaier reverse drive facility' — Neumaier reverse drive facility has failed or is faulty.

The Neumaier reverse drive facility control system has failed, lost communication, or is reporting an internal fault. As a consequence, the Tractor Management System (TMS) switches off the speed specification, and the tractor may be restricted to emergency mode.

• 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
• Fendt 300 Vario (COM III)
• Fendt 400 Vario / Farmer 400 (COM III)
• Fendt 700 Vario / Favorit 700 (COM III)
• Fendt 800 Vario (COM III)
• Fendt 900 Vario / Favorit 900 (COM III)

1. 1

   Observe the Neumaier display unit for specific sub-faults handed over by the TMS.

2. 2

   Check fuses on circuit board A013 (specifically F039, F040, F041, F046, and F047) for the Neumaier ECU and CAN bus power supply.

3. 3

   Inspect wiring separation points on the right mudguard (X1332 for power, X1333 for ground, X1334 for direction detection, X1335 for speed) for corrosion or broken wires.

4. 4

   Verify the 8.5V supply to the reverse drive clutch pedal potentiometer and check if calibration code 4011 can be successfully completed.

1. 1

   Resolve Power/CAN Issues

   If any fuses on circuit board A013 are blown, replace them. If wiring at separation points X1332–X1335 is damaged, repair the harness to restore CAN bus communication between the A002 ECU and the Neumaier ECU.

2. 2

   Address Potentiometer Faults

   If the clutch pedal potentiometer for the reverse drive is faulty, replace the sensor and perform an End-Of-Line (EOL) reprogramming / calibration using Fendt calibration code '4011'.

3. 3

   Replace Neumaier ECU

   If power, ground, and CAN lines are intact but the Neumaier system remains unresponsive or internally faulted, the Neumaier ECU itself must be replaced.

4. 4

   Clear Codes

   Use the FENDIAS diagnostic tool to clear the 4.1.B6 code from the A002 Enhanced Control ECU memory.

5. 5

   Test Drive

   Perform a test drive in both standard and reverse drive modes to ensure the TMS speed specification is functioning correctly and no emergency mode is triggered.