Fendt 5.1.34 – 4WD ENHANCED CONTROL: B047 - Proximity sensor - steering angle sensor 1 — Signal / switch fault

The system is receiving an invalid, missing, or out-of-range signal from the primary steering angle sensor located on the front axle, which disables the 4WD and differential lock automatic modes.

• 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 Vario series
• Fendt Favorit 700 and 900 series
• Fendt 300, 400, 700, 800, and 900 Vario series (including COM III generation models)

1. 1

   Inspect the B047 steering angle sensor and its wiring harness for physical damage, corrosion, or debris

2. 2

   Check the sensor's connector for a short circuit to ground or an open circuit in the voltage supply and earth lines

3. 3

   Use FENDIAS diagnostic software or an AGCO CANUSB scanner to monitor the live signal from Sensor 1 (B047) while turning the steering wheel lock-to-lock

4. 4

   Attempt to run the steering angle sensor calibration procedure via the Varioterminal to see if the sensor simply lost its calibration parameters

1. 1

   Park the tractor

   Park the tractor on a level surface, turn off the engine, and engage the parking brake.

2. 2

   Locate the sensor

   Locate the B047 steering angle sensor on the front axle.

3. 3

   Disconnect the harness

   Carefully disconnect the electrical harness from the sensor, ensuring no dirt enters the connector.

4. 4

   Remove the sensor

   Unbolt and remove the faulty proximity/steering angle sensor from its mounting bracket.

5. 5

   Install the new sensor

   Install the new sensor and tighten the mounting hardware.

6. 6

   Reconnect the harness

   Reconnect the electrical harness securely.

7. 7

   Clear the fault code

   Turn on the tractor ignition and use the diagnostic terminal to clear the stored 5.1.34 fault code.

8. 8

   Perform calibration

   Perform the steering angle sensor calibration procedure as outlined in the operator's manual. The system must learn the new sensor's center, left-lock, and right-lock values.

9. 9

   Test drive

   Test drive the tractor and verify that the 4WD and differential lock automatic modes engage and disengage correctly when steering.