CLAAS Id772Dh / 772Dh (110 16) – ENG (A15): Temperature of the engine coolant averagely high (Moderately Severe Level)

The engine coolant temperature has exceeded normal operating parameters (typically above 105°C - 110°C depending on the specific engine). As a protective function, the engine calculator reduces engine power by 5% per minute until it reaches 80% of its nominal power to prevent catastrophic engine damage.

• AXION 800
• AXION 810
• AXION 820
• AXION 830
• AXION 840
• AXION 850
• AXION 870
• AXION 900
• ARION 400
• ARION 500
• ARION 600
• XERION 4000
• XERION 4500
• XERION 5000
• JAGUAR 800
• JAGUAR 900
• LEXION 500
• LEXION 600
• LEXION 700
• TUCANO
• SCORPION

1. 1

   Check the engine coolant level.

2. 2

   Inspect the radiator, intercooler, and condenser for external blockages (dust, chaff, debris).

3. 3

   Verify the cooling fan is operating correctly.

4. 4

   Test the Engine Coolant Temperature Sensor (B45 or B045) resistance and verify the input voltage at the connector.

5. 5

   Inspect the wiring harness between the B45 sensor and the ENG (A15) module for chafing, open circuits, or short circuits.

6. 6

   Ensure the ENG (A15) module connections are secure.

1. 1

   Safety First

   Allow the engine to cool completely before opening the cooling system to prevent severe burns from pressurized hot coolant.

2. 2

   Visual & Physical Cleaning

   Blow out the radiator and heat exchanger fins with compressed air to ensure maximum airflow.

3. 3

   Coolant Level

   Check the coolant reservoir. Top up with the OEM-specified coolant if low. If a leak is found (e.g., hoses, water pump), repair the leak first.

4. 4

   Sensor Replacement

   If diagnosed as faulty: Locate the B45/B045 coolant temperature sensor on the engine block/thermostat housing. Disconnect the electrical harness connector. Unscrew the faulty sensor (have a catch pan ready for minor coolant spillage). Install the new sensor and torque to OEM specifications. Reconnect the electrical harness.

5. 5

   Thermostat/Water Pump

   If the sensor is good (reading accurately) and the engine is genuinely overheating, replace the thermostat or inspect the water pump for impeller failure.

6. 6

   Post-Repair

   Top off the coolant, bleed the cooling system of air, start the engine, and monitor the temperature via the CAB module display. Clear the Id772Dh / 110 16 fault code using a diagnostic tool.