A/C UNIT CONSTRUCTION/OPERATION
id071100100400
Construction
• An A/C unit with integrated cooling and heater units has been adopted.
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1
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Evaporator
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2
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Heater core
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3
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Expansion valve
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4
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Air mix door
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5
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Airflow mode door
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6
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Evaporator temperature sensor
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7
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Power transistor (full-auto air conditioner), resistor (manual air conditioner)
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8
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Air mix actuator
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9
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Air flow mode actuator
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10
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Airflow mode main link
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11
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A/C amplifier
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Air Mix Door Operation
• The air mix actuator, installed in the A/C unit, controls HOT or COLD positions, depending on the position of the temperature control dial. As a result, the airflow distribution changes, and the airflow temperature is controlled.
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1
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Airflow from blower unit
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2
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Heater core
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3
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Evaporator
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4
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Air mix door
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5
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COLD
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6
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HOT
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Airflow Mode Door Operation
• The airflow mode actuator move to the VENT, BI-LEVEL, HEAT, HEAT/DEF, or DEFROSTER position, depending on the position of the airflow mode selector switch. As a result, the airflow mode changes.
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1
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Airflow from blower unit
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2
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Air mix door
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3
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Airflow mode door
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4
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Evaporator
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5
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Heater core
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6
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To center vent and side vent
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7
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To front heat
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8
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To rear heat
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9
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To defroster and side demister
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10
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VENT
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11
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BI-LEVEL
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12
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HEAT
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13
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HEAT/DEF
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14
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DEFROSTER
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Airflow Distribution
L.H.D.
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AIRFLOW MODE
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AIRFLOW RATE (%)
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VENT
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HEAT
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DEFROSTER
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DRIVER-SIDE
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PASSENGER-SIDE
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DRIVER-SIDE
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PASSENGER-SIDE
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DRIVER-SIDE
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PASSENGER-SIDE
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SIDE
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CENTER
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CENTER
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SIDE
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FRONT
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REAR
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FRONT
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REAR
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SIDE
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CENTER
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CENTER
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SIDE
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VENT
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25
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25
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25
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25
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-
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-
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-
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-
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-
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-
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-
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-
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BI-LEVEL
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12.5
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12.5
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12.5
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12.5
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16.25
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8.75
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16.25
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8.75
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-
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-
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-
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-
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HEAT
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7.5
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-
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-
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7.5
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21.125
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11.375
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21.125
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11.375
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2.4
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7.6
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7.6
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2.4
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HEAT/DEF
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7.5
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-
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-
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7.5
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14.625
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7.875
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14.625
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7.875
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4.8
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15.2
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15.2
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4.8
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DEFROSTER
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10
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-
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-
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10
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-
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-
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-
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-
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9.6
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30.4
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30.4
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9.6
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R.H.D.
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AIRFLOW MODE
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AIRFLOW RATE (%)
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VENT
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HEAT
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DEFROSTER
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DRIVER-SIDE
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PASSENGER-SIDE
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DRIVER-SIDE
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PASSENGER-SIDE
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DRIVER-SIDE
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PASSENGER-SIDE
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SIDE
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CENTER
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CENTER
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SIDE
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FRONT
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REAR
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FRONT
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REAR
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SIDE
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CENTER
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CENTER
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SIDE
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VENT
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25
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25
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25
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25
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-
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-
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-
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-
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-
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-
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-
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-
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BI-LEVEL
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12.5
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12.5
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12.5
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12.5
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16.25
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8.75
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16.25
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8.75
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-
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-
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-
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-
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HEAT
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-
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-
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-
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-
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26.975
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14.525
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26.975
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14.525
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2.04
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6.46
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6.46
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2.04
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HEAT/DEF
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-
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-
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-
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-
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16.25
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8.75
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16.25
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8.75
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6
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19
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19
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6
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DEFROSTER
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-
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-
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-
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-
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-
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-
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-
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-
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12
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38
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38
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12
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