ELECTRICAL FAN CONTROL OPERATION [L8, LF]

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•  The cooling fan may keep operating for a few seconds or minutes after the ignition switch is turned off depending on the engine coolant temperature.
•  When the operation conditions are met for each function, the PCM sends an operation signal to cooling fan relay No.1 or No.2/No.3 to operate the cooling fan motors.
•  The rotation speed of the cooling fan motor is switched between three levels according to a combination of the cooling fan relays.
•  The cooling fan motor operation switches in the order of stop, low speed, middle speed, and high speed, taking 3 s for each operation while regular-driving cooling.

Operation Conditions

Function

Operation condition

Cooling fan motor rotation speed

Cooling fan relay

ECT

A/C amplifier

(A/C switch)

Refrigerant pressure switch

(high, low)

Vehicle speed

No.1

No.2

No.3
Regular-driving cooling
Less than 100 °C {212 °F}
OFF
—
Stop
OFF
ON
OFF
More than 85 km/h {52 mph}
45 —85 km/h {28—52 mph}
Low
ON
OFF
OFF
Less than 45 km/h {28 mph}
Middle
ON
OFF
ON
ON
—
High
ON
100—108 °C {212—226 °F}
OFF
—
Middle
ON
OFF
ON
ON
High
ON
More than 108 °C {226 °F}
—
After-cooling
•  When all the following conditions are met:
―  Ignition switch: OFF
―  Estimated maximum engine coolant temperature is high after engine stop
Low
ON
OFF
OFF
•  When all the following conditions are met:
―  Estimated maximum engine coolant temperature is the specified value or more even when operating at low rotation speed.
Middle
ON
OFF
ON

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