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Wiring diagrams Section: Cooling System (Mechanical)

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Engine Cooling System (H6DO) - Mechanism & Function: Overview Subaru Outback BP

Cooling System (Mechanical) 1 illustration

DESCRIPTION

Each radiator fan is made of plastic. It is driven by an electric motor which is retained on a shroud.

Scheme 197

Scheme 197: DESCRIPTION

Scheme 197: DESCRIPTION

The operation of the radiator fan is controlled by the ECM, depending on the signals from the engine coolant temperature sensor, vehicle speed sensor and A/C switch as shown below.

Vehicle speed	A/C compressor	A/C pressure switch level	Engine coolant temperature
			Below 95°C (203°F)		96 - 99°C (203 - 210°F)		Over 100°C (212°F)
			Operation of radiator fans		Operation of radiator fans		Operation of radiator fans
			Main fan	Sub fan	Main fan	Sub fan	Main fan	Sub fan
Below 19 km/h (12 MPH)	Off		Off	Off	Low-speed	Low-speed	Mid-speed	Mid-speed
	On	Low	Low-speed	Low-speed	Mid-speed	Mid-speed	High-speed	High-speed
	On	High	Mid-speed	Mid-speed	High-speed	High-speed	High-speed	High-speed
Between 20 and 69 km/h (12 and 43 MPH)	Off		Off	Off	Mid-speed	Mid-speed	High-speed	High-speed
	On	Low	High-speed	High-speed	High-speed	High-speed	High-speed	High-speed
	On	High	High-speed	High-speed	High-speed	High-speed	High-speed	High-speed
Between 70 and 105 km/h (43 and 65 MPH)	Off		Off	Off	Mid-speed	Mid-speed	High-speed	High-speed
	On	Low	Mid-speed	Mid-speed	High-speed	High-speed	High-speed	High-speed
	On	High	High-speed	High-speed	High-speed	High-speed	High-speed	High-speed
Over 106 km/h (66 MPH)	Off		Off	Off	Mid-speed	Mid-speed	High-speed	High-speed
	On	Low	Off	Off	Mid-speed	Mid-speed	High-speed	High-speed
	On	High	Mid-speed	Mid-speed	Mid-speed	Mid-speed	High-speed	High-speed

VEHICLE SPEED SPECIFICATION