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Under the conditions below with the blower fan ON, the A/C-ECU transmits the
auto stop prohibition signal to the AS&G-ECU.
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- Outside air temperature is low.
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- The outlet mode is set to DEF.
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- The outlet temperature is high with the A/C switch ON.
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- The setting temperature is changed by 3 degrees or more <Vehicles
with automatic air conditioner>.
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- The interior temperature is low <Vehicles with automatic air conditioner>.
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- With the air volume/outlet mode set to Auto, MAX HOT or MAX COOL
is attained <Vehicles with automatic air conditioner>.
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Under the conditions below with the blower fan ON during auto stop, the A/C-ECU
transmits the start request signal to the AS&G-ECU.
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- The outlet temperature rises with the A/C switch ON.
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- The outlet mode that is not in DEF is changed to DEF.
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- The A/C switch is changed from OFF to ON.
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- The setting temperature is changed by 3 degrees or more <Vehicles
with automatic air conditioner>.
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- With the air volume/outlet mode set to Auto, it is changed to MAX
HOT or MAX COOL <Vehicles with automatic air conditioner>.
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When detecting that the auto stop is underway, A/C-ECU performs the following
controls to retain the interior comfort of the vehicle.
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- The blower fan level will be decreased. The outlet temperature rising is
restricted by reducing the air volume that passes though the evaporator to the extent possible.
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- To prevent interior temperature rising by intrusion of the outside air when
the outside temperature is high, the opening angle of the interior/exterior damper
will be modified. By reducing the intake amount of the outside air, the interior comfort of
the vehicle is retained. When the outside temperature is low, a certain amount of outside air
is taken to defog the windows.
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- The air mix damper will be closed to prevent heat from the heater core, minimising
the effect to the interior.
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