Mazda 6. Manual - part 85

CONTROL SYSTEM 

U–13

U

CLIMATE CONTROL UNIT

A6E854061190T01

Manual Air Conditioner

•

A wire-type climate control unit is used with the manual air conditioner.

•

The airflow mode selector dial, temperature control dial, fan switch have been enlarged to improve ease of 
operation.

•

The A/C, REC/FRESH and rear defroster switches equipped in the current climate control unit have been 
relocated to the center panel.

.

•

A defroster switch into the climate control unit detects when the airflow mode selector dial is turned to 
DEFROSTER position. When the defroster switch turned on, the center panel starts defroster control. (See 

U–

17 Defroster Control

.)

.

A6E8540T035

1

Climate control unit

2

Airflow mode selector dial

3

fan switch

4

Temperature control dial

A6E8540T036

1

Climate control unit

2

Airflow mode selector dial

3

Defroster switch

U–14

CONTROL SYSTEM 

Full-auto Air Conditioner

•

A logic-type climate control unit is used with the full-auto air conditioner.

•

The airflow mode selector dial, temperature setting dial, fan switch have been enlarged to improve ease of 
operation.

•

The A/C, REC/FRESH and rear defroster switches equipped in the current climate control unit have been 
relocated to the center panel.

.

•

Information about the operating condition of the system is displayed on the information display.

.

End Of Sie

A6E8540T037

1

Climate control unit

2

Fan switch

3

OFF switch

4

MODE switch

5

Temperature setting dial

6

Defroster switch

7

AUTO switch

A6E8540T038

1

Information display

CONTROL SYSTEM 

U–15

U

MANUAL AIR CONDITIONER CONTROL SYSTEM

A6E854001081T01

Block Diagram

•

The climate control unit carries out the defroster control base on signal sent from the airflow mode selector dial, 
and sends an operating signal to the air intake actuator.

•

The center panel sends an A/C signal to the PCM via the refrigerant pressure switch based on signals sent 
from the A/C switch, fan switch and evaporator temperature sensor.

•

The PCM sends operating signals to the A/C relay and IAC valve based on A/C signal and vehicle signal.

.

A6E8540T048

1

Evaporator temperature sensor

2

A/C switch

3

Fan switch

4

Center panel

5

A/C compressor control

6

Refrigerant pressure switch (HI and LO pressure)

7

Refrigerant pressure switch (middle pressure) (L3 
engine only)

8

Climate control unit

9

Defroster control

10

A/C cut-off control

11

Idle air control

12

Air intake actuator

13

A/C relay

14

Thermal protector

15

Magnetic clutch

16

IAC valve

U–16

CONTROL SYSTEM 

System Wiring Diagram

.

Outline of Control System

•

Manual air conditioner defroster control and A/C compressor control.

A6E8540T039

1

Blower relay

2

Blower  motor

3

Resistor

4

Climate control unit

5

Defroster switch

6

From  PCM

7

Refrigerant pressure switch

8

Ambient temperature sensor

9

Evaporator temperature sensor

10

Air intake actuator

11

Center panel

12

A/C relay

13

Magnetic clutch

14

To PCM

Control name

Control part

Defroster control

Climate control unit

A/C compressor control

Center panel