Fendt 15.1.6C – A050 - ECU, basic control unit: Front axle suspension position sensors not calibrated

Fault code 15.1.6C indicates that the front axle suspension position sensors—specifically B066 (left wheel position sensor) and B068 (right wheel position sensor)—are not calibrated. These sensors continuously monitor the position and movement of the front wheels to manage the tractor's front axle suspension and Fendt Stability Control (FSC) systems.

• 922 Vario COM III
• 924 Vario COM III
• 927 Vario COM III
• 930 Vario COM III
• 933 Vario COM III
• 936 Vario COM III
• Fendt 300 Vario
• Fendt 400 Vario
• Fendt 700 Vario
• Fendt 800 Vario
• Fendt 900 Vario series
• Fendt 922
• Fendt 924
• Fendt 927
• Fendt 930
• Fendt 933
• Fendt 936
• Fendt 939
• Fendt 942

1. 1

   Verify the 8.5 V power supply to the sensors (Left sensor B066: check A013, fuse 17; Right sensor B068: check A013, fuse 09)

2. 2

   Verify the signal voltage falls within the expected range of 0.6 V to 4.2 V (4 to 20 mA) depending on the suspension position

3. 3

   Inspect the wiring harnesses for the left and right wheel position sensors for continuity, shorts, or physical damage (refer to OEM circuit diagram Sheet 9)

1. 1

   Access Vario diagnostics

   Turn on the tractor and access the Vario diagnostics menu on the terminal.

2. 2

   Enter Calibration Code

   Enter Calibration Code "7666". This specific code initiates the calibration procedure for the front axle suspension position sensors.

3. 3

   Complete calibration

   Follow the on-screen prompts to complete the calibration. This compensates for any mechanical and electrical tolerances in the sensors.

4. 4

   Clear fault code

   Clear the fault code from the memory.

5. 5

   Test suspension system

   Test the suspension system (using the "Raise" and "Lower" suspension buttons on the multifunction armrest) to ensure the fault does not return.

6. 6

   Replace sensor if calibration fails

   If the calibration fails or the system throws a subsequent plausibility/signal error (such as codes 15.1.67, 15.1.68, or 15.1.6E), the sensor itself is likely faulty and must be replaced. If replaced, you must rerun calibration code 7666.