Mazda 6. Manual — part 373

U–1

U

U

HEATER AND AIR CONDITIONER SYSTEMS

LOCATION INDEX . . . . . . . . . . . . . U-3

BASIC SYSTEM . . . . . . . . . . . . ..U-3
CONTROL SYSTEM. . . . . . . . . . . U-4

SERVICE WARNINGS . . . . . . . . . . ... U-8

HANDLING REFRIGERANT. . . . . . . . U-8
STORING REFRIGERANT . . . . . . . . .. U-8

SERVICE CAUTIONS. . . . . . . . . . . .U-8

HANDLING INSUFFICIENT REFRIGERANT

LEVEL. . . . . . . . . . . . . . . ...U-8

HANDLING COMPRESSOR OIL. . . . . . .U-8

REFRIGERANT SYSTEM SERVICE

PROCEDURES. . . . . . . . . . . . . U-9
GAS CHARGING SET INSTALLATION . . . .. U-9
RECOVERY . . . . . . . . . . . . . . .U-9
CHARGING. . . . . . . . . . . . . . ..U-9
REFRIGERANT PRESSURE CHECK . . . ...U-12
REFRIGERANT SYSTEM PERFORMANCE

TEST. . . . . . . . . . . . . . . ...U-13

BASIC SYSTEM . . . . . . . . . . . . ...U-14

BLOWER UNIT REMOVAL/INSTALLATION. .U-14
BLOWER UNIT DISASSEMBLY/ASSEMBLY ...U-14
AIR FILTER REMOVAL/INSTALLATION . . ..U-15
AIR FILTER INSPECTION. . . . . . . . .U-15
A/C UNIT REMOVAL/INSTALLATION . . . ..U-15
A/C UNIT DISASSEMBLY/ASSEMBLY . . . .U-18
EXPANSION VALVE

REMOVAL/INSTALLATION. . . . . . . U-21

EVAPORATOR INSPECTION . . . . . . ...U-22
HEATER CORE INSPECTION . . . . . . ..U-23
REAR HEAT DUCT

REMOVAL/INSTALLATION. . . . . . . U-23

A/C COMPRESSOR

REMOVAL/INSTALLATION. . . . . . . U-23

CONDENSER REMOVAL/INSTALLATION . ...U-24
CONDENSER INSPECTION . . . . . . . .U-24
REFRIGERANT LINES

REMOVAL/INSTALLATION. . . . . . . U-25

CONTROL SYSTEM. . . . . . . . . . . .U-30

AIR INTAKE ACTUATOR

REMOVAL/INSTALLATION. . . . . . . U-30

AIR INTAKE ACTUATOR INSPECTION . . ...U-30
AIR MIX ACTUATOR

REMOVAL/INSTALLATION. . . . . . . U-31

AIR MIX ACTUATOR INSPECTION. . . . ..U-32
AIRFLOW MODE ACTUATOR

REMOVAL/INSTALLATION. . . . . . . U-33

AIRFLOW MODE ACTUATOR INSPECTION ...U-34
BLOWER MOTOR

REMOVAL/INSTALLATION. . . . . . . U-35

BLOWER MOTOR INSPECTION . . . . . ..U-35
RESISTOR REMOVAL/INSTALLATION . . ...U-35
RESISTOR INSPECTION. . . . . . . . ..U-36
POWER MOS FET

REMOVAL/INSTALLATION. . . . . . . U-36

POWER MOS FET INSPECTION . . . . . .U-36
MAGNETIC CLUTCH

DISASSEMBLY/ASSEMBLY . . . . . . ..U-36

MAGNETIC CLUTCH ADJUSTMENT . . . ...U-38

MAGNETIC CLUTCH INSPECTION. . . . ..U-38
SOLAR RADIATION SENSOR

REMOVAL/INSTALLATION . . . . . . . U-39

SOLAR RADIATION SENSOR INSPECTION ...U-39
AMBIENT TEMPERATURE SENSOR

REMOVAL/INSTALLATION . . . . . . . U-39

AMBIENT TEMPERATURE SENSOR

INSPECTION . . . . . . . . . . . . ..U-40

CABIN TEMPERATURE SENSOR

REMOVAL/INSTALLATION . . . . . . . U-40

CABIN TEMPERATURE SENSOR

INSPECTION . . . . . . . . . . . . ..U-41

EVAPORATOR TEMPERATURE SENSOR

REMOVAL/INSTALLATION . . . . . . . U-41

EVAPORATOR TEMPERATURE SENSOR

INSPECTION . . . . . . . . . . . . ..U-41

WATER TEMPERATURE SENSOR

REMOVAL/INSTALLATION . . . . . . . U-42

WATER TEMPERATURE SENSOR

INSPECTION . . . . . . . . . . . . ..U-42

REFRIGERANT PRESSURE SWITCH

REMOVAL/INSTALLATION . . . . . . . U-42

REFRIGERANT PRESSURE SWITCH

INSPECTION . . . . . . . . . . . . ..U-43

CLIMATE CONTROL UNIT REMOVAL . . . .U-44
CLIMATE CONTROL UNIT INSTALLATION . .U-45
CLIMATE CONTROL UNIT

DISASSEMBLY/ASSEMBLY . . . . . . ..U-45

CLIMATE CONTROL UNIT WIRE

ADJUSTMENT . . . . . . . . . . . . U-46

CLIMATE CONTROL UNIT INSPECTION. . .U-47
FAN SWITCH INSPECTION. . . . . . . ..U-52
DEFROSTER SWITCH INSPECTION. . . ...U-52

ON-BOARD DIAGNOSTIC . . . . . . . . ...U-53

DIAGNOSTIC TROUBLE CODE NUMBER

INSPECTION . . . . . . . . . . . . ..U-53

DTC 02. . . . . . . . . . . . . . . ...U-56
DTC 06. . . . . . . . . . . . . . . ...U-56
DTC 07. . . . . . . . . . . . . . . ...U-57
DTC 10. . . . . . . . . . . . . . . ...U-57
DTC 11. . . . . . . . . . . . . . . ...U-57
DTC 12. . . . . . . . . . . . . . . ...U-58
DTC 13. . . . . . . . . . . . . . . ...U-58
DTC 14. . . . . . . . . . . . . . . ...U-59
DTC 15. . . . . . . . . . . . . . . ...U-59
DTC 18. . . . . . . . . . . . . . . ...U-59
DTC 19. . . . . . . . . . . . . . . ...U-60
DTC 21. . . . . . . . . . . . . . . ...U-60
DTC 22. . . . . . . . . . . . . . . ...U-61
DTC 58. . . . . . . . . . . . . . . ...U-61
DTC 59. . . . . . . . . . . . . . . ...U-61
DTC 02, 18, 21 (WHEN TWO OR MORE

DTCS ARE INDICATED AT THE
SAME TIME) . . . . . . . . . . . . ...U-62

DTC 06, 10, 12, 14, 18, 21 (WHEN TWO OR

MORE DTCS ARE INDICATED AT THE
SAME TIME) . . . . . . . . . . . . ...U-62

U–2

DTC 07, 11, 13, 15, 19, 22 (WHEN TWO OR

MORE DTCS ARE INDICATED AT THE
SAME TIME) . . . . . . . . . . . . ...U-63

DTC 19, 22 (WHEN TWO OR MORE DTCS

ARE INDICATED AT THE SAME TIME). . .U-63

TROUBLESHOOTING. . . . . . . . . . ..U-64

FOREWORD. . . . . . . . . . . . . ..U-64
TROUBLESHOOTING INDEX . . . . . . ...U-64
NO.1 INSUFFICIENT AIR (OR NO AIR)

BLOWN FROM VENTS . . . . . . . . ..U-65

NO.2 AMOUNT OF AIR BLOWN FROM

VENTS DOES NOT CHANGE . . . . . . U-65

NO.3 AMOUNT OF AIR BLOWN FROM

VENTS DOES NOT CHANGE . . . . . . U-67

NO.4 AIR INTAKE MODE DOES NOT

CHANGE. . . . . . . . . . . . . . .U-68

NO.5 NO TEMPERATURE CONTROL WITH

CLIMATE CONTROL UNIT. . . . . . . .U-70

NO.6 WINDSHIELD FOGGED. . . . . . ...U-70
NO.7 AIR FROM VENTS COLD ENOUGH . ...U-72
NO.8 NO COOL AIR . . . . . . . . . . ..U-75
NO.9 NOISE WHILE OPERATING A/C

SYSTEM . . . . . . . . . . . . . . .U-76

LOCATION INDEX

U–3

U

BASIC SYSTEM

A6E850001040W01

.

LOCATION INDEX

A6E8500W001

A6E8500W002

1

Blower unit
(See

U–14 BLOWER UNIT REMOVAL/

INSTALLATION

)

(See

U–14 BLOWER UNIT DISASSEMBLY/

ASSEMBLY

)

2

Air filter
(See

U–15 AIR FILTER REMOVAL/INSTALLATION

)

(See

U–15 AIR FILTER INSPECTION

)

3

A/C unit
(See

U–15 A/C UNIT REMOVAL/INSTALLATION

)

(See

U–18 A/C UNIT DISASSEMBLY/ASSEMBLY

)

4

Rear heat duct
(See

U–23 REAR HEAT DUCT REMOVAL/

INSTALLATION

)

5

A/C compressor
(See

U–23 A/C COMPRESSOR REMOVAL/

INSTALLATION

)

6

Condenser
(See

U–24 CONDENSER REMOVAL/

INSTALLATION

)

(See

U–24 CONDENSER INSPECTION

)

7

Heater hose

8

Refrigerant lines
(See

U–25 REFRIGERANT LINES REMOVAL/

INSTALLATION

)

U–4

LOCATION INDEX

End Of Sie

CONTROL SYSTEM

A6E850001042W01

L.H.D.

.

A6E8500W003

A6E8500W004