Fendt 07.1.C1 – Transmission Control System: B015 - Sensor, bevel pinion

The switch-on speed was not reached for the PTO/power lift auto mode. The B015 sensor signal failed or dropped out, preventing the tractor's computer from verifying the ground speed required to safely engage automated PTO and linkage functions.

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

1. 1

   Check the 8.5V power supply to the B015 sensor at the A013 fuse board (specifically fuses like Fuse 7 or Fuse 8) to ensure the circuit has not blown.

2. 2

   Inspect the wiring harness and connectors leading to the B015 sensor on the transmission housing for chafed wires, moisture ingress, or loose pins.

3. 3

   Check the terminal for accompanying plausibility fault codes like 04.1.82 or 04.1.83. If present, this points to a shared wiring fault or mechanical transmission slippage rather than a single failed sensor.

4. 4

   Test the sensor using a multimeter to verify its resistance and ensure it is outputting a signal when the tractor is in motion.

1. 1

   Preparation

   Park the tractor on a level surface, engage the parking brake, and disconnect the battery to prevent electrical shorts.

2. 2

   Locate the Sensor

   Locate the B015 bevel pinion speed sensor on the transmission housing (usually near the 4WD clutch housing or lower transmission block).

3. 3

   Removal

   Disconnect the electrical connector from the sensor, remove the retaining screw holding the sensor flange in place, and carefully pry off the flange/sensor using an assembly lever, taking care not to drop debris into the transmission housing.

4. 4

   Installation

   Lubricate the O-ring on the new sensor with clean transmission oil, insert the new sensor into the port, secure the retaining screw, and reconnect the electrical harness.

5. 5

   Calibration & Testing

   Reconnect the battery, clear the stored 07.1.C1 fault code via the Variotronic terminal, and test drive the tractor to ensure the speedometer works correctly and that the PTO/power lift auto modes engage properly.