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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