Nissan Pathfinder. Manual — part 683
HEATING AND COOLING UNIT ASSEMBLY
HA-43
< REMOVAL AND INSTALLATION >
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sembly
INFOID:0000000009176756
HEATING AND COOLING UNIT ASSEMBLY : Removal and Installation - Rear Cooling
Unit Assembly
INFOID:0000000009176757
REMOVAL
CAUTION:
Before servicing, turn the ignition switch off, disconnect both battery cables and wait at least three
minutes.
1. Disconnect the negative and positive battery terminals and wait at least three minutes. Refer to
2. Discharge the refrigerant. Refer to
3. Remove the back door kicking plate. Refer to
INT-36, "BACK DOOR KICKING PLATE : Removal and
.
4. Remove the luggage side lower finisher (RH). Refer to
INT-31, "LUGGAGE SIDE LOWER FINISHER :
.
5. Remove the storage box side finisher. Refer to
INT-33, "STORAGE BOX SIDE FINISHER : Removal and
.
6. Remove the jack bracket bolts, then remove the jack bracket.
7. Disconnect the rear underfloor high-pressure and low-pressure pipes from the rear heating and cooling
unit assembly.
CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
8. Remove the rear ventilator duct upper. Refer to
VTL-13, "REAR VENTILATOR DUCT UPPER : Removal
9. Remove the rear ventilator duct lower. Refer to
VTL-14, "REAR VENTILATOR DUCT LOWER : Removal
10. Disconnect the harness connectors from the rear cooling unit assembly.
11. Remove the rear cooling unit assembly bolts.
12. Disconnect the drain hose from the rear cooling unit assembly.
13. Remove the rear cooling unit assembly.
1.
Rear ventilator duct upper seal
2.
Rear blower motor resistor 2
3.
Rear evaporator
4.
Rear expansion valve
5.
Rear expansion valve grommet
6.
Rear expansion valve bolts
7.
O-ring
8.
Rear evaporator seal
9.
Rear drain hose
10. Rear cooling unit lower housing
11. Rear blower motor 2
12. Rear cooling unit upper housing
ALIIA0578ZZ
HA-44
< REMOVAL AND INSTALLATION >
HEATING AND COOLING UNIT ASSEMBLY
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Do not reuse O-rings.
• Apply A/C oil to the O-rings of the rear underfloor high-pressure and low-pressure pipes for installa-
tion.
• After charging refrigerant, check for leaks. Refer to
HEATER CORE
HEATER CORE : Exploded View
INFOID:0000000009176758
HEATER CORE : Removal and Installation
INFOID:0000000009176759
REMOVAL
NOTE:
When removing components such as hoses, lines/tubes, etc., cap or plug openings to prevent fluid from spill-
ing.
1. Discharge the refrigerant. Refer to
2. Drain the engine coolant. Refer to
CO-11, "Changing Engine Coolant"
.
3. Remove the front heating and cooling unit assembly. Refer to
HA-41, "HEATING AND COOLING UNIT
ASSEMBLY : Removal and Installation - Front Heating and Cooling Unit Assembly"
4. Remove the front foot duct (LH). Refer to
HA-41, "HEATING AND COOLING UNIT ASSEMBLY :
Exploded View - Front Heating and Cooling Unit Assembly"
.
5. Remove the front heater core pipe cover. Refer to
HA-41, "HEATING AND COOLING UNIT ASSEMBLY :
Exploded View - Front Heating and Cooling Unit Assembly"
.
6. Remove the front heater core.
INSTALLATION
Installation is in the reverse order of removal.
EVAPORATOR
1.
Front heating and cooling unit assembly
2.
Front foot duct (LH)
3.
Heater core pipes cover
4.
Heater core
Front
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HEATING AND COOLING UNIT ASSEMBLY
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EVAPORATOR : Exploded View
INFOID:0000000009176760
Exploded View - Front Evaporator
Exploded View - Rear Evaporator
EVAPORATOR : Removal and Installation - Front Evaporator
INFOID:0000000009176761
REMOVAL
1. Discharge the refrigerant. Refer to
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1.
Front heating and cooling unit assembly
2.
Front evaporator
3.
Heater case side cover
4.
Air mix door motor (passenger side)
5.
Front blower unit case
6.
Intake door motor
7.
Front blower motor
8.
Upper floor connecting duct (RH)
9.
Air mix door motor (rear)
10. In-cabin microfilter cover
11. In-cabin microfilter
12. Drain hose
13. Expansion valve grommet
14. Front expansion valve
15. Front heater core
16. Air mix door motor (driver side)
17. Aspirator hose
18. Upper floor connecting duct (LH)
19. Front heater core pipe cover
20. Mode door motor (front)
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1.
Rear ventilator duct upper seal
2.
Rear blower motor resistor 2
3.
Rear evaporator
4.
Rear expansion valve
5.
Rear expansion valve grommet 6.
Rear expansion valve bolts
7.
O-ring
8.
Rear evaporator seal
9.
Rear drain hose
10. Rear cooling unit lower housing
11. Rear blower motor 2
12. Rear cooling unit upper housing
HA-46
< REMOVAL AND INSTALLATION >
HEATING AND COOLING UNIT ASSEMBLY
2. Remove the front heating and cooling unit assembly. Refer to
HA-41, "HEATING AND COOLING UNIT
ASSEMBLY : Exploded View - Front Heating and Cooling Unit Assembly"
3. Remove the front blower unit case from the front heating and cooling unit assembly.
4. Remove the heater case side cover.
5. Remove the front evaporator.
CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
6. Remove the front expansion valve from the front evaporator, as necessary.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Do not reuse O-rings.
• Apply A/C oil to new O-rings for installation.
• After charging the refrigerant, check for leaks. Refer to
EVAPORATOR : Removal and Installation - Rear Evaporator
INFOID:0000000009176762
REMOVAL
1. Discharge the refrigerant. Refer to
2. Remove the rear cooling unit assembly. Refer to
HA-43, "HEATING AND COOLING UNIT ASSEMBLY :
Removal and Installation - Rear Cooling Unit Assembly"
3. Separate the rear cooling unit upper and lower housing to access the rear evaporator.
4. Remove the rear evaporator.
CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
5. Remove the rear expansion valve from the rear evaporator, as necessary.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Do not reuse O-rings.
• Apply A/C oil to the O-rings of the rear evaporator for installation.
• After charging the refrigerant, check for leaks. Refer to
EXPANSION VALVE
EXPANSION VALVE : Exploded View
INFOID:0000000009176763
Front
ALIIA0560ZZ
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