Nissan Quest E52. Instruction — part 715
A/C UNIT ASSEMBLY
HA-51
< REMOVAL AND INSTALLATION >
C
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15. Remove harness fixing clip (A), and then disconnect harness
connector.
16. Disconnect junction harness connectors. (Passenger side)
17. Remove mounting nuts (A), and then remove instrument stay.
(LH and RH)
18. Remove harness fixing clip (A).
19. Disconnect drain hose from heater & cooling unit assembly.
20. Disconnect front door harness connector. Refer to
DLK-432, "DOOR ASSEMBLY : Removal and Installa-
. (Passenger side)
21. Disconnect diagnosis sensor unit harness connectors. Refer to
SR-29, "Removal and Installation"
NOTE:
Remove all of harness connectors and clips necessary to allow steering member to be moved. Move main
harness aside and secure work space so that steering member can be easily moved.
22. Perform the following operation to move steering member (1).
• Remove steering member mounting bolts (A) from the vehicle.
• Remove steering member mounting bolts (B) and harness fixing clip (C) from heater & cooling unit
assembly
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HA-52
< REMOVAL AND INSTALLATION >
A/C UNIT ASSEMBLY
• Remove steering member mounting bolt (C) from blower unit assembly
23. Move steering member to secure work space as shown in the
figure.
24. Remove front A/C unit assembly from the vehicle.
25. Separate blower unit assembly and heater & cooling unit assembly.
INSTALLATION
Note the following items, and then install in the reverse order of removal.
CAUTION:
• Replace O-rings with new ones. Then apply compressor oil to them when installing.
• Check for leakages when recharging refrigerant. Refer to
NOTE:
Refer to
when filling radiator with engine coolant.
EVAPORATOR
EVAPORATOR : Removal and Installation
INFOID:0000000009651594
CAUTION:
Perform lubricant return operation before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, never perform lubricant return operation. Refer to
22, "Perform Lubricant Return Operation"
REMOVAL
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A/C UNIT ASSEMBLY
HA-53
< REMOVAL AND INSTALLATION >
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1.
Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant. Refer to
2.
Remove front A/C unit assembly. Refer to
HA-49, "HEATER & COOLING UNIT ASSEMBLY : Removal
3.
Separate blower unit assembly and heater & cooling unit assembly.
4.
Remove foot duct RH. Refer to
VTL-12, "FOOT DUCT : Removal and Installation"
5.
Remove front air mix door motor. (Passenger side)
• Refer to
. (Automatic air conditioning)
• Refer to
. (Manual air conditioning)
6.
Remove fixing screws (A), and then remove heater & cooling
unit case cover (1) and filter cover (2) from heater & cooling unit
assembly as a set.
7.
Pull out evaporator assembly (2) toward heater & cooling unit
assembly (1) to remove.
8.
Remove intake sensor from evaporator assembly. Refer to
9.
Remove mounting bolts, and then remove evaporator pipe and expansion valve from evaporator assem-
bly as a set. Refer to
.
CAUTION:
Cap or wrap the joint of the evaporator, evaporator pipe, and expansion valve with suitable mate-
rial such as vinyl tape to avoid the entry of air.
INSTALLATION
Note the following items, and then install in the reverse order of removal.
CAUTION:
• Replace O-rings with new ones. Then apply compressor oil to them when installing.
• When install the intake sensor, set the same position before replacement.
• Never rotate the bracket insertion part when removing and installing the intake sensor.
• Perform lubricant adjusting procedure after installing new evaporator. Refer to
Adjusting Procedure for Components Replacement Except Compressor"
EVAPORATOR PIPE ASSEMBLY
EVAPORATOR PIPE ASSEMBLY : Removal and Installation
INFOID:0000000009651595
CAUTION:
Perform lubricant return operation before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, never perform lubricant return operation. Refer to
22, "Perform Lubricant Return Operation"
REMOVAL
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HA-54
< REMOVAL AND INSTALLATION >
A/C UNIT ASSEMBLY
1.
Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant. Refer to
2.
Remove evaporator assembly. Refer to
HA-52, "EVAPORATOR : Removal and Installation"
3.
Remove mounting bolts, and then remove expansion valve from evaporator assembly. Refer to
4.
Remove mounting bolts, and then remove evaporator pipe assembly from evaporator assembly. Refer to
CAUTION:
Cap or wrap the joint of expansion valve, evaporator pipe assembly, and evaporator with suitable
material such as vinyl tape to avoid the entry of air.
INSTALLATION
Note the following items, and then install in the reverse order of removal.
CAUTION:
• Replace O-rings with new ones. Then apply compressor oil to them when installing.
• Check for leakages when recharging refrigerant. Refer to
HEATER CORE
HEATER CORE : Removal and Installation
INFOID:0000000009651596
CAUTION:
Perform lubricant return operation before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, never perform lubricant return operation. Refer to
22, "Perform Lubricant Return Operation"
REMOVAL
1.
Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant. Refer to
2.
Drain engine coolant from cooling system. Refer to
3.
Remove front A/C unit assembly. Refer to
HA-49, "HEATER & COOLING UNIT ASSEMBLY : Removal
4.
Separate blower unit assembly and heater & cooling unit assembly.
5.
Remove heater pipe grommet. Refer to
6.
Remove fixing screw (A), and then remove fixing pawls.
7.
Remove heater pipe support from heater & cooling unit assembly.
8.
Remove fixing screws (A), and then remove heater pipe cover.
: Pawl
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