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 

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BASIC SYSTEM

A6E850001040W01

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LOCATION INDEX

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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

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L.H.D.

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