FULL-AUTO AIR CONDITIONER FUNCTION [FULL-AUTO AIR CONDITIONER]

id0740a1100600


Block Diagram

•  The climate control unit performs airflow temperature control, airflow volume control, airflow mode control, air intake control, and A/C compressor control based on input signals from the each sensor, and outputs signals to each actuator, power MOS FET, and refrigerant pressure switch (high pressure and lower pressure switches) (ZJ, ZY) / refrigerant pressure sensor (MZ-CD 1.4 DI Turbo, MZ-CD 1.6 (Y6)).
•  The PCM performs A/C cut control and idle air control based on input signals from switches such as the refrigerant pressure switch (ZJ, ZY) / refrigerant pressure sensor (MZ-CD 1.4 DI Turbo, MZ-CD 1.6 (Y6)), and outputs operation signals to the A/C relay and the throttle valve actuator.
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Control Table

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

Basic Control

Control description

Correction control
Airflow temperature control
Airflow temperature automatic control
•  Air intake correction
•  A/C correction
•  MAX HOT and MAX COLD correction
•  Water temperature correction
Airflow volume control
Airflow volume automatic control
•  Water temperature correction (Warm-up correction)
•  Mild start correction
•  MAX HOT and MAX COLD correction
•  Window fogging prevention correction at start
•  Starting compensation correction
•  Defroster correction
•  Start-up burn-out prevention function
Airflow volume manual control
•  Defroster correction
•  Excess current prevention function during start-up
Airflow mode control
Airflow mode automatic control
•  Water temperature correction (Warm-up correction)
Airflow mode manual control
―
Air intake control
Air intake manual control
•  Defroster correction
A/C compressor control
A/C compressor automatic control
•  Defroster correction
•  Ambient temperature correction
•  MAX COLD correction
•  Window fogging prevention correction at start
A/C compressor manual control
•  Defroster correction
•  Ambient temperature correction
•  Window fogging prevention correction at start

Supplementary function
Fail-safe function
Sensor signal delay function
On-board Diagnostic Function


Control Transition by Switch Operation

Airflow temperature control, airflow volume control

Operation switch

Airflow temperature control

Airflow volume control

Control before switch operation

Control before switch operation

Automatic control

Automatic control

Automatic control

(Defroster correction)

Manual control

OFF
Airflow volume control dial
OFF
Automatic control
OFF
OFF
OFF
―
AUTO
Automatic control
―
―
Automatic control
Automatic control
Manual
Automatic control
Manual control
Manual control
―
Manual control
Airflow mode control dial
AUTO
Automatic control
Automatic control
Automatic control
(Defroster correction cancel)
No change
No change
Vent
Automatic control
Automatic control
Automatic control
(Defroster correction cancel)
No change
No change
BI-LEVEL
Automatic control
Automatic control
Automatic control
(Defroster correction cancel)
No change
No change
HEAT
Automatic control
Automatic control
Automatic control
(Defroster correction cancel)
No change
No change
HEAT/DEF
Automatic control
Automatic control
Automatic control
(Defroster correction cancel)
No change
No change
DEFROSTER
Automatic control
Defroster correction
―
No change
No change
A/C switch
Automatic control
Automatic control
No change
No change
No change
REC/FRESH switch
Automatic control
Automatic control
No change
No change
No change
Temperature setting dial
15 (left end)*2/
18 (left end)*3
MAX COLD
MAX HI
MAX HI
No change
No change
16—28*2/
19—31*3
Automatic control
Automatic control
Defroster correction
No change
No change
29 (right end)*2/
32 (right end)*3
MAX HOT
AUTO HI*1
AUTO HI
No change
No change

*1  :Water temperature correction takes precedence.
*2  :Except General (L.H.D.) specs.
*3  :General (L.H.D.) specs.

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

Operation switch

Airflow mode control

Air intake control

A/C compressor control

Control before switch operation

Control before switch operation

Control before switch operation

Automatic control

Manual control

Manual control

Automatic control

OFF
Airflow volume control dial
OFF
Fixed at mode prior to fan OFF
No change
No change
OFF
OFF
AUTO
Automatic control
No change
No change
Automatic control
No change
Manual
Automatic control
No change
No change
Automatic control
No change
Airflow mode control dial
AUTO
―
Automatic control
No change *2
Auto control *3
No change *3
VENT
VENT
VENT
No change *2
Auto control *3
No change *3
BI-LEVEL
BI-LEVEL
BI-LEVEL
No change*2
Auto control *3
No change*3
HEAT
HEAT
HEAT
No change*2
Auto control *3
No change*3
HEAT/DEF
HEAT/DEF
HEAT/DEF
No change*2
Auto control *3
No change*3
Defroster
DEFROSTER
DEFROSTER
Defroster correction
Defroster correction
Defroster correction
A/C switch
Automatic control
No change
No change
OFF
Automatic control
REC/FRESH switch
Automatic control
No change
RECIRCULATE→FRESH
FRESH→RECIRCULATE
Automatic control
No change
Temperature setting dial
15 (left end)*4/
18 (left end)*5
Automatic control*1
No change
No change
Automatic control
No change
16—28*4/
19—31*5
Automatic control*1
No change
No change
Automatic control
No change
29 (right end)*4/
32 (right end)*5
Automatic control*1
No change
No change
Automatic control
No change

*1  :Water temperature correction takes precedence.
*2  :If operation is from the defroster, returns to condition prior to the defroster. However, it does not change if the REC/FRESH switch is operated during defrost.
*3  :If operation is from the defroster, returns to the condition prior to defrost. However, it does not change if the A/C switch is operated during defrost.
*4  :Except General (L.H.D.) specs.
*5  :General (L.H.D.) specs.