Engine Coolant Temperature Sensor Monitoring

Engine Coolant Temperature Sensor Monitoring

Range Check
The engine coolant temperature is electrical O.K., if the following condition is true:

Diagnosis threshold min. < engine coolant temperature < Diagnosis threshold max.







Plausibility Check low-side
The engine coolant temperature is plausible, if:

(reference temperature - threshold) < engine coolant temperate







Plausibility Check high-side
The engine coolant temperature is plausible, if:

(engine coolant temperature - reference temperature) > threshold







flow chart: