AIRFLOW MODE CONTROL OPERATION


BHE074061190T12

Order of Priority for Controls

• The airlflow mode control operates according to the following order of priority.

1. Warm-up correction
2. Airflow mode manual control
3. MAX HOT and MAX COLD Correction
4. Airflow mode automatic control

Airflow Mode Automatic Control

• The A/C amplifier calculates the mode actuator opening angle (airflow mode) based on the target temperature operating the actuator.

• If the target temperature is high, the actuator opening angle is set to HEAT, if the temperature is low, it is set to VENT.

1
A/C amplifier
2
Target temperature
3
Airflow mode determination
4
Airflow mode actuator

Correction

Warm-up correction

• Switches the airflow mode after the engine is started in accordance with the increase in engine coolant temperature to prevent discomfort caused by cold air blown around the front passenger feet area.

1
DEFROSTER
2
HEAT/DEF
3
AUTO
4
Engine coolant temperature

MAX HOT and MAX COLD correction

• When the set temperature is at 32.0, the airflow mode is set to HEAT, when it is at 18.0, it is set to vent.

Airflow Mode Manual Control

• The airflow mode can be switched by operating the airflow mode selector switch and the defroster switch.