Fendt 1E.1.0F – Engine Control Unit (ECU) / EDC 7: B079 - Sensor (combined), engine oil temperature/engine oil level

Sensor faulty or Signal fault. The engine control system is receiving an erratic signal, an out-of-range value, or no signal at all from the combined oil temperature and level sensor.

• 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 (COM III)
• Fendt 400 Vario (COM III)
• Fendt 700 Vario (COM III)
• Fendt 800 Vario (COM III)
• Fendt 900 Vario (COM III)
• Fendt 922 Vario (COM III)
• Fendt 924 Vario (COM III)
• Fendt 927 Vario (COM III)
• Fendt 930 Vario (COM III)
• Fendt 933 Vario (COM III)
• Fendt 936 Vario (COM III)

1. 1

   Manually check the engine oil dipstick to ensure the engine is not critically low on oil or overheating.

2. 2

   Connect the Fendt SERDIA diagnostic tool and check for associated sub-codes FC:00C9 or FC:00CB.

3. 3

   Inspect the wiring harness leading to the B079 sensor for chafing, breaks, or melted insulation (refer to Circuit Diagram Sheet 21).

4. 4

   Disconnect the sensor and check the connector pins for corrosion, moisture ingress, or poor terminal tension.

1. 1

   Preparation

   Turn off the tractor, engage the parking brake, and disconnect the battery to prevent electrical shorts during repair.

2. 2

   Locate the Sensor

   Locate the B079 combined sensor on the engine block (typically mounted on or near the engine oil pan/sump).

3. 3

   Drain Oil (If Necessary)

   Place a clean catch pan underneath and drain the engine oil to prevent a spill when the sensor is removed.

4. 4

   Remove the Sensor

   Disconnect the electrical harness connector. Unbolt or unscrew the faulty B079 sensor from the engine block.

5. 5

   Install the New Sensor

   Clean the mating surface on the engine block. Install the new combined sensor with a new O-ring/seal and tighten to the engine manufacturer's torque specifications.

6. 6

   Reassembly

   Reconnect the electrical harness, ensuring the connector clicks securely into place.

7. 7

   Refill Fluids

   Refill the engine with the correct grade and volume of engine oil.

8. 8

   Clear Codes

   Reconnect the battery. Connect the Fendt SERDIA diagnostic laptop and execute the 'delete error' command to clear code 1E.1.0F (and associated FC:00C9/00CB codes) from the EDC memory.

9. 9

   Test

   Start the engine, check for leaks around the new sensor, and verify that the tractor's terminal displays accurate oil temperature and level readings without throwing a new code.