Fendt 1.2.41 – A022 - ECU, EMR2: Coolant temperature has gone over the shutoff threshold.

The system has detected that the engine coolant temperature has exceeded the critical warning/shutoff limit. The system will trigger a warning, reduce engine output, and eventually force an emergency shutdown if the temperature remains too high.

• 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
• 409
• 410
• 411
• 412
• Fendt Favorit 700 series
• Fendt Favorit 900 series
• Fendt 300 Vario Series
• Fendt 400 Vario Series
• Fendt 500 Vario Series
• Fendt 700 Vario Series
• Fendt 800 Vario Series
• Fendt 900 Vario Series
• 818 Vario
• 820 Vario
• Fendt 930

1. 1

   Check engine coolant level and ensure there are no leaks in the cooling system

2. 2

   Inspect the radiator and cooling package for blockages (dust, chaff, debris) that would restrict airflow

3. 3

   Inspect the cable connection to the B048 water temperature sensor for breaks, corrosion, or loose pins

4. 4

   Verify the shutoff threshold programmed in the A022 ECU using the SERDIA diagnostic tool

1. 1

   Clean the Cooling System

   Blow out the radiator and cooling fins with compressed air to remove any dust, chaff, or debris restricting airflow.

2. 2

   Top Up Fluids

   If the coolant level is low, fill it to the manufacturer's specified level and bleed the system of air.

3. 3

   Test the B048 Sensor

   Use a multimeter to test the resistance of the B048 water temperature sensor. Compare the readings against the temperature-resistance curve for the Deutz EMR2 system.

4. 4

   Replace the Sensor

   If the sensor's signal is out of range, or if the engine is physically running at normal operating temperatures but the sensor is reporting an overheat condition, replace the B048 sensor.

5. 5

   Clear the Fault

   Connect the Deutz SERDIA diagnostic software (via the FENDIAS interface) to clear the inactive fault code from the EMR2 ECU memory once the repair is complete.