Mazda 6. Manual — part 379
BASIC SYSTEM
U–21
U
UHEATER AND AIR CONDITIONER SYSTEMS
EXPANSION VALVE REMOVAL/INSTALLATION
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1. Disconnect the negative battery cable.
2. Discharge the refrigerant from the system. (See
.) (See
Caution
• If moisture or foreign material enters the refrigeration cycle, cooling ability will be lowered and
abnormal noise will occur. Always immediately plug open fittings after removing any refrigeration
cycle parts to keep moisture or foreign material out of the cycle.
3. Disconnect the cooler hose (Lo) (L.H.D) or cooler pipe No.4 (R.H.D.) and cooler pipe No.3. (See
REFRIGERANT LINES REMOVAL/INSTALLATION
4. Remove the passenger-side air bag module. (See
T–121 PASSENGER-SIDE AIR BAG MODULE REMOVAL/
5. Remove the duct (1).
6. Remove the air mix actuator. (Full-auto air conditioner)
7. Remove the adhesive polyurethane (1). (See
U–20–2 Adhesive polyurethane (1) Assembly Note
8. Remove the screws and cover. (Type A and type B)
9. Remove the one seal plate (L.H.D. type A and type B, R.H.D. type C) or two seal plates (R.H.D. type A and
type B).
10. Remove the bolts (type A and type B) or one bolt (type C) and shift the outlet pipe. Do not allow compressor oil
to spill.
11. Remove the two bolts. (Type C)
12. Remove the expansion valve. Do not allow compressor oil to spill.
13. Remove the screws and plate. (Type C)
14. Remove the adhesive polyurethane (2). (Type C) (See
U–20–1 Adhesive polyurethane (2) Assembly Note
.)
End Of Sie
BASIC SYSTEM
L.H.D.
TYPE A
R.H.D.
TYPE A
N·m {kgf·cm, in·lbf}
R
3.5—5.5
{36—56, 31—48}
OUTLET PIPE
SEAL PLATE
DUCT (1)
COVER
SHIFT
EXPANSION VALVE
R
3.5—5.5
{36—56, 31—48}
OUTLET PIPE
SEAL PLATE
DUCT (1)
COVER
SHIFT
EXPANSION
VALVE
R
R
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BASIC SYSTEM
U–21–1
U–21HEATER AND AIR CONDITIONER SYSTEMS
End Of Sie
BASIC SYSTEM
L.H.D.
TYPE B
R.H.D.
TYPE B
N·m {kgf·cm, in·lbf}
R
3.5—5.5
{36—56, 31—48}
OUTLET PIPE
SEAL PLATE
DUCT (1)
COVER
SHIFT
EXPANSION VALVE
R
3.5—5.5
{36—56, 31—48}
OUTLET PIPE
SEAL PLATE
DUCT (1)
COVER
SHIFT
EXPANSION
VALVE
R
R
ADHESIVE
POLYURETHANE (1)
ADHESIVE
POLYURETHANE (1)
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L.H.D.
TYPE C
R.H.D.
TYPE C
N·m {kgf·cm, in·lbf}
R
3.5—5.5
{36—56, 31—48}
OUTLET PIPE
DUCT (1)
PLATE
SHIFT
EXPANSION VALVE
R
3.5—5.5
{36—56, 31—48}
OUTLET PIPE
SEAL
PLATE
DUCT (1)
PLATE
SHIFT
EXPANSION
VALVE
R
R
ADHESIVE
POLYURETHANE (1)
ADHESIVE
POLYURETHANE (1)
ADHESIVE
POLYURETHANE (2)
ADHESIVE
POLYURETHANE (2)
3.5—5.5
{36—56, 31—48}
3.5—5.5
{36—56, 31—48}
R
R
R
R
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U–22
BASIC SYSTEM
UHEATER AND AIR CONDITIONER SYSTEMS
15. Install in the reverse order of removal.
16. Perform the refrigerant system performance test. (See
U–13 REFRIGERANT SYSTEM PERFORMANCE
.)
End Of Sie
EVAPORATOR INSPECTION
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1. Remove the A/C unit. (See
U–15 A/C UNIT REMOVAL/INSTALLATION
2. Remove the evaporator from the A/C unit.
3. Inspect for cracks, damage, and oil leakage.
• If any problems are found, replace the evaporator.
4. Inspect for bent fins.
• If any are bent, use a flathead screwdriver to straighten them.
End Of Sie
BASIC SYSTEM
BASIC SYSTEM
U–23
U
HEATER CORE INSPECTION
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U–15 A/C UNIT REMOVAL/INSTALLATION
.)
2. Remove the heater core from the A/C unit.
3. Inspect for cracks, damage, and coolant leakage.
• If any problems are found, replace the heater core.
4. Inspect for bent fins.
• If any are bent, use a flathead screwdriver to straighten them.
5. Verify that the heater core inlet and outlet pipe are not distorted or damaged.
• Repair with pliers if necessary.
End Of Sie
REAR HEAT DUCT REMOVAL/INSTALLATION
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1. Turn over the front floor covering. (See
S–99 FRONT FLOOR COVERING REMOVAL/INSTALLATION
2. Remove in the order indicated in the table.
.
3. Install in the reverse order of removal.
End Of Sie
A/C COMPRESSOR REMOVAL/INSTALLATION
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1. Disconnect the negative battery cable.
2. Discharge the refrigerant from the system. (See
.) (See
3. Remove the right side splash shield and mudguard (L.H.D. only).
4. Loosen the drive belt and remove it.
Caution
• If moisture or foreign material enters the refrigeration cycle, cooling ability will be lowered and
abnormal noise will occur. Always immediately plug open fittings after removing any refrigeration
cycle parts to keep moisture or foreign material out of the cycle.
5. Remove in the order indicated in the table. Do not
allow compressor oil to spill.
.
6. Install in the reverse order of removal.
7. Adjust the drive belt.
8. Perform the refrigerant system performance test.
(See
1
Rear heat duct (Right)
2
Rear heat duct (Left)
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1
U–29 Refrigerant Lines Installation Note
2
Cooler pipe No.4 (L.H.D.) or cooler hose (LO)
(R.H.D.)
(See
U–29 Refrigerant Lines Installation Note
3
Magnetic clutch connector
4
U–24 A/C Compressor Installation Note
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