FULL-AUTO AIR CONDITIONER FUNCTION

id074000100600


Block Diagram

•  The control system consists of input components (sensors), output components (actuators, magnetic clutch, power MOS FET, and other parts), and a control device (front climate control unit).
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Control Table

•  The full-auto air conditioner system functions based on the five basic types of controls and two supplementary functions.

×:Possible
-:Not possible

Basic control

Control description

Correction control

Front

Rear
Airflow temperature control
Airflow temperature automatic control
MAX HOT and MAX COLD correction
×
×
Air mix actuator opening angle correction
×
×
Airflow volume control
Airflow volume automatic control
Warm-up correction
×
×
Mild start correction
×
×
MAX HOT and MAX COLD correction
×
×
Defroster correction
×
-
Solar radiation correction
×
-
Airflow volume manual control
Defroster correction
×
-
Airflow mode control
Airflow mode automatic control
Warm-up correction
×
-
MAX HOT and MAX COLD correction
×
×
Airflow mode manual control
―
×
-
Air intake control
Air intake automatic control
MAX HOT and MAX COLD correction
×
-
Defroster correction
×
-
Air intake manual control
Defroster correction
×
-
A/C compressor control
A/C compressor automatic control
MAX HOT and MAX COLD correction
×
-
Defroster correction
×
-
A/C compressor manual control
Defroster correction
×
-

Supplementary function
Fail-safe function
On-board diagnostic function


Control Type Transition by Switch Operation (Front)

Airflow temperature control, airflow volume control

Operation switch

Airflow temperature control

Airflow volume control

Control prior to switch operation

Control prior to switch operation

Automatic control

Driver-side

Automatic control

Passenger-side

Automatic control

Defroster correction

Manual control

Dual ON

Dual OFF

1

2

3

4

5

6

7
OFF switch
Automatic control
Automatic control
Automatic control
OFF
OFF
OFF
AUTO switch
Automatic control
Automatic control
Automatic control
Automatic control
*6
*6
Fan switch
+
Automatic control
Automatic control
Automatic control
Manual control*2
Manual control*7
2
3
4
5
6
7
7
-
Automatic control
Automatic control
Automatic control
Manual control*3
Manual control*8
1
1
2
3
4
5
6
MODE switch
Automatic control
Automatic control
Automatic control
Automatic control
*5
No change
DEFROSTER switch
Automatic control
Defroster correction
Automatic control
Defroster correction
*5
Defroster correction
A/C switch
Automatic control
Automatic control
Automatic control
Automatic control
No change
No change
REC switch
Automatic control
Automatic control
Automatic control
Automatic control
No change
No change
Driver-side temperature setting dial*1
15.0
MAX COLD
Automatic control
MAX COLD
MAX HI
*6
No change
No change
15.5—31.5
Automatic control
Automatic control
Automatic control
Automatic control
No change
No change
32.0
MAX HOT
Automatic control
MAX HOT
AUTO HI*4
*6
No change
No change
Passenger-side temperature setting dial*1
15.0
Automatic control
MAX COLD
MAX COLD
MAX HI
*6
No change
No change
15.5—31.5
Automatic control
Automatic control
Automatic control
Automatic control
No change
No change
32.0
Automatic control
MAX HOT
MAX HOT
AUTO HI*4
*6
No change
No change
DUAL switch
Automatic control
Automatic control
Automatic control
*6
No change
No change

*1  :Adjusted up or down in increments of 0.5 within a range of 15.0—32.0.
*2  :Increases to the manual voltage that is closest to the auto voltage.
*3  :Decreases to the manual voltage that is closest to the auto voltage.
*4  :Warm-up correction takes precedence.
*5  :Returns to condition prior to defroster operation. However, if it had been off prior to defroster operation, it switches to automatic control.
*6  :MAX HOT and MAX COLD correction takes precedence.
*7  :Increases to the manual voltage that is closest to the defroster correction voltage.
*8  :Decreases to the manual voltage that is closest to the defroster correction voltage.

Airflow mode control, air intake control, A/C compressor control

Operation switch

Airflow mode control

Air intake control

A/C compressor control

Control prior to switch operation

Control prior to switch operation

Control prior to switch operation

Automatic control

Manual control

Automatic control

Manual control

Automatic control

Manual control
OFF switch
Fixed at mode before turned OFF
No change*2
FRESH
No change
OFF
OFF
AUTO switch
Automatic control
Automatic control
Automatic control
Automatic control
Automatic control
Automatic control
Fan switch
+
Automatic control
No change
Automatic control
No change
Automatic control
No change
-
Automatic control
No change
Automatic control
No change
Automatic control
No change
MODE switch
VENT → BI-LEVEL
BI-LEVEL → HEAT
HEAT → HEAT/DEF
HEAT/DEF → VENT
DEFROSTER → HEAT
VENT → BI-LEVEL
BI-LEVEL → HEAT
HEAT → HEAT/DEF
HEAT/DEF → VENT
DEFROSTER →*2
Automatic control*3
No change*3
Automatic control*6
No change*6
DEFROSTER switch
DEFROSTER
DEFROSTER*2
Defroster correction
Defroster correction*2
Defroster correction
Defroster correction
A/C switch
Automatic control
No change
Automatic control
No change
A/C→OFF
OFF→A/C*4
A/C→OFF
OFF→A/C*4
REC/FRESH switch
Automatic control
No change
FRESH→REC
REC→FRESH*5
FRESH→REC
REC→FRESH*5
Automatic control
No change
Driver-side temperature setting dial*1
15.0
Automatic control
No change
Automatic control
No change
Automatic control
No change
15.5—31.5
Automatic control
No change
Automatic control
No change
Automatic control
No change
32.0
Automatic control
No change
Automatic control
No change
Automatic control
No change
Passenger-side temperature setting dial*1
15.0
Automatic control
No change
Automatic control
No change
Automatic control
No change
15.5—31.5
Automatic control
No change
Automatic control
No change
Automatic control
No change
32.0
Automatic control
No change
Automatic control
No change
Automatic control
No change
DUAL switch
Automatic control
No change
Automatic control
No change
Automatic control
No change

*1  :Adjusted up or down in increments of 0.5 within a range of 15.0—32.0.
*2  :Returns to condition prior to defroster operation.
*3  :FRESH during HEAT/DEF
*4  :A/C is set at ON during DEFROSTER, HEAT/DEF, HEAT. Switches only to the A/C display. (L.H.D.) / A/C is set at ON during DEFROSTER. Switches only to the A/C display. (R.H.D.)
*5  :Set at FRESH during DEFROSTER, HEAT/DEF (L.H.D.) / Set at FRESH during DEFROSTER (R.H.D.)
*6  :A/C ON during HEAT/DEF

Control Type Transition by Switch Operation (Rear)

Airflow temperature control, airflow volume control

Operation switch

Airflow temperature control

Airflow volume control

Airflow mode control

Control prior to switch operation

Control prior to switch operation

Control prior to switch operation

Automatic control

Automatic control

Manual control

Automatic control
REAR
Fan switch OFF
Automatic control
-
OFF
Fixed at mode before turned OFF
Fan switch
Automatic control
-
*2
Automatic control
Temperature setting dial*1
MAX COLD
MAX COLD
-
No change
Automatic
Middle
Automatic control
-
No change
Automatic
MAX HOT
MAX HOT
-
No change
Automatic
FRONT
OFF switch
Automatic control
OFF
OFF
Fixed at mode before turned OFF
AUTO switch*6
Automatic control
Automatic control
No change
Automatic control
Fan switch
Automatic control
Automatic control
No change
Automatic control
DEFROSTER switch
Automatic control
Automatic control
No change
Automatic control
A/C switch
Automatic control
Automatic control
No change
Automatic control
Temperature setting dial*1, 6
15.0
MAX COLD
MAX HI
No change
Automatic control
15.5—31.5
Automatic control
Automatic control
No change
Automatic control
32.0
MAX HOT
AUTO HI*4
No change
Automatic control
Rear control switch: ON
Automatic control
*2
-
Automatic control
Rear control switch: OFF
*3,*5
-
*5
Automatic control

*1  :Adjusted up or down in increments of 0.5 within a range of 15.0—32.0.
*2  :Set to the rear airflow volume control dial position.
*3  :Set to the driver-side temperature setting dial position.
*4  :Warm-up correction takes precedence.
*5  :MAX HOT and MAX COLD correction takes precedence.
*6  :Operable only when the rear control switch is on and the control indicator is illuminated.