•  The climate control unit calculates the air mix actuator opening angle characteristic for the given ambient temperature based on the set temperature, solar radiation amount, and airflow mode. The air mix actuator opening angle characteristic decreases as the sunlight intensity increases.

•  The opening angle characteristic of the air mix actuator and the current ambient temperature are compared and the basic opening angle for the air mix actuator is determined according to the A/C compressor control status. The opening angle maintains the target temperature (calculated control value T1) in the cabin against changes in external factors such as sunlight intensity and ambient temperature.

•  If there is a difference between the target temperature (calculated control value T1) and current cabin temperature, the basic opening angle of the air mix actuator is corrected so that the cabin temperature rapidly reaches the target temperature.

•  Calculated control value T1 is the target cabin temperature as set by the climate control unit based on differences between the set temperatures, temperatures input from the sensors, and sunlight intensity. Calculated control value T1 is constantly calculated according to the set temperature and the changes in the signals input from the sensors.

•  When the air intake mode is switched from FRESH to REC with the A/C off, a correction is added to the air mix actuator opening angle to prevent a rise in airflow temperature. In addition, the air mix actuator operation is delayed to prevent a sudden drop in airflow temperature because of this correction.

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•  When the A/C compressor control is switched from A/C on mode to off mode, the opening angle of the air mix actuator is switched from the A/C on mode opening angle to the A/C off mode opening angle to prevent a rise in airflow temperature. In addition, this correction delays the air mix actuator operation to prevent a sudden drop in airflow temperature. However, the operation is not delayed when the evaporator temperature is 15 °C {59 °F} or more.

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•  When the temperature is set to 29/32 (right end of temperature setting dial), the air mix actuator opening angle is fixed at fully open, and when set to 15/18 (left end of temperature setting dial), it is fixed at fully closed.

•  Corrects the air mix actuator opening angle so that it is adjusted to HOT to prevent discomfort caused by cold air blown from the vent. However, the engine coolant temperature correction is not performed when the ambient temperature is 25 °C {77 °F} or more.