ELECTRICAL FAN CONTROL [SKYACTIV-G 2.5T]

id0140h0205000


Outline

•  To improve engine reliability and cooling performance, operates the cooling fan according to the vehicle conditions and cools the radiator and condenser.
•  The PCM determines the engine operation conditions based on the signal from each sensor and performs duty-control of the fan control module to control the operation time and rotation speed of the cooling fan motor.

Block Diagram

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Operation


Engine coolant temperature condition

•  Output duty ratio is controlled according to the engine coolant temperature as indicated in the graph.
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A/C operation condition

•  Controls the demand airflow volume depending on the refrigerant pressure and vehicle speed when the A/C switch is on.

Vehicle speed

Refrigerant pressure

1.0 MPa {10 kgf/cm2, 145 psi} or less

1.9 MPa {19 kgf/cm2, 276 psi} or more

1.91 MPa {19.5 kgf/cm2, 277 psi} or more
0 km/h {0 mph} or less
14 %
55 %
55 %
30 km/h {19 mph} or more
14 %
55 %
55 %
40 km/h {25 mph} or more
14 %
55 %
55 %
50 km/h {31 mph} or more
14 %
55 %
55 %
60 km/h {37 mph} or more
14 %
55 %
55 %
80 km/h {50 mph} or more
14 %
55 %
55 %
85 km/h {53 mph} or more
0 %
0 %
0 %


Conditions during collision

•  If a collision signal from the SAS control module is received, the PCM stops the engine cooling fan to avoid use of battery voltage.