Fendt 5.1.35 – General System / Transmission control bus (4WD ENHANCED CONTROL and DIFFERENTIAL LOCK ENHANCED CONTROL): B047 - Proximity sensor - steering angle sensor 2 — Signal / switch fault

The system is detecting an invalid signal, switch error, or complete failure from the secondary steering angle proximity sensor (designated as component B047). The immediate consequence of this fault is that the 4WD (Four-Wheel Drive) and differential lock automatic systems are thrown out of order, and the automatic stop function for these systems will not operate.

• 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 Farmer 400 series (409, 410, 411, 412)
• Fendt Favorit 700 series (711, 712, 714, 716)
• Fendt Favorit 900 series
• Fendt 300, 400, 700, 800, and 900 Vario (COM III) models
• Fendt 916, 920, 924, 926, and 930 Vario

1. 1

   Verify the exact symptoms: Confirm that the 4WD and differential lock automatic modes are disabled, which is the standard safety consequence of this code.

2. 2

   Consult the '4WD / Diff. Lock' circuit diagram in the Fendt service manual to trace the wiring path for sensor B047.

3. 3

   Locate the B047 proximity sensor, which is mounted on the front axle (used for monitoring steering angles to automatically disengage 4WD/diff lock during sharp turns).

4. 4

   Inspect the sensor's wiring harness and connector for physical damage, corrosion, or breaks that could cause a signal or switch fault.

1. 1

   Safely park the tractor and ensure the front axle is accessible.

   Safely park the tractor and ensure the front axle is accessible.

2. 2

   Locate the B047 steering angle proximity sensor on the front axle.

   Locate the B047 steering angle proximity sensor on the front axle.

3. 3

   Disconnect the cable from the B047 sensor.

   Disconnect the cable from the B047 sensor.

4. 4

   Test the wiring harness for continuity back to the control module to rule out a broken wire.

   Test the wiring harness for continuity back to the control module to rule out a broken wire.

5. 5

   If the wiring is intact, the B047 sensor itself has failed internally and must be replaced.

   If the wiring is intact, the B047 sensor itself has failed internally and must be replaced.

6. 6

   Unbolt and remove the faulty B047 steering angle sensor from the axle housing.

   Unbolt and remove the faulty B047 steering angle sensor from the axle housing.

7. 7

   Install the new OEM steering angle sensor.

   Install the new OEM steering angle sensor.

8. 8

   Reconnect the sensor cable.

   Reconnect the sensor cable.

9. 9

   Clear the stored 5.1.35 fault code from the tractor's terminal/memory and test the tractor to ensure the 4WD and differential lock automatic functions have been restored.

   Clear the stored 5.1.35 fault code from the tractor's terminal/memory and test the tractor to ensure the 4WD and differential lock automatic functions have been restored.