ELECTRICAL FAN CONTROL [SKYACTIV-X 2.0]
id0140hf205000
Outline
• Engine reliability and cooling performance have been improved through cooling of the radiator and condenser by operation of the cooling fan according to vehicle conditions.
Block Diagram
Operation
Engine coolant temperature condition
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• Output duty ratio is controlled according to the engine coolant temperature.
A/C operation condition
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• When the A/C switch is ON, the PCM determines the airflow volume demand based on the refrigerant pressure and the vehicle speed.
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Vehicle speed
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Refrigerant pressure
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0.8 MPa {8 kgf/cm2, 116 psi} or less
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1.0 MPa {10 kgf/cm2, 145 psi} or less
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1.3 MPa {13 kgf/cm2, 189 psi} or less
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1.5 MPa {15 kgf/cm2, 218 psi} or less
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1.7 MPa {17 kgf/cm2, 247 psi} or less
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20 km/h {12 mph} or less
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0 %
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30 %
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48 %
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56 %
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75 %
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40 km/h {25 mph} or less
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0 %
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30 %
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48 %
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56 %
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75 %
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65 km/h {40 mph} or less
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0 %
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30 %
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48 %
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56 %
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75 %
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105 km/h {65.2 mph} or more
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0 %
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0 %
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0 %
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0 %
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0 %
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After cooling control
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• The ACC Operates the cooling fan in 2 steps according to the engine coolant temperature.
1st step
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― When the engine coolant temperature is 96 °C {205 °F}} or more with the ignition switched OFF, the cooling fan is operated at a duty ratio of 33% for 8 min.
2nd step
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― When the engine coolant temperature is 106 °C {223 °F} or more after the 1st step is completed, the cooling fan is operated at a duty ratio of 33% until the temperature is less than 106 °C, or a maximum of 4 min have elapsed.
Gasoline particulate filter protection
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• The cooling fan is operated at a duty ratio of 86% during compulsory gasoline particulate filter regeneration.
Conditions during collision
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• If a collision signal from the SAS control module is received, the PCM stops the engine cooling fan to avoid use of battery voltage.
