Nissan Pathfinder. Manual - part 684

HEATING AND COOLING UNIT ASSEMBLY

HA-47

< REMOVAL AND INSTALLATION >

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Rear

EXPANSION VALVE : Removal and Installation - Front Expansion Valve

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REMOVAL

1. Discharge the refrigerant. Refer to 

HA-23, "Recycle Refrigerant"

.

2. Remove the cowl top extension. Refer to 

EXT-25, "Removal and Installation"

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3. Disconnect the high-pressure and low-pressure pipe from the expansion valve. 
4. Remove the front expansion valve bolts, then remove the front expansion valve.

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 front expansion valve for installation.

• After charging refrigerant, check for leaks. Refer to 

HA-21, "Leak Test"

.

EXPANSION VALVE : Removal and Installation - Rear Expansion Valve

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REMOVAL

1. Discharge the refrigerant. Refer to 

HA-23, "Recycle Refrigerant"

.

2. Remove the luggage side lower finisher (RH). Refer to 

INT-31, "LUGGAGE SIDE LOWER FINISHER :

Removal and Installation"

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3. Disconnect the rear underfloor high-pressure and low-pressure pipes from the rear cooling unit assembly.
4. Remove the rear expansion valve bolts, then remove the rear expansion valve.

CAUTION:

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)

ALIIA0578ZZ

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-48

< REMOVAL AND INSTALLATION >

HEATING AND COOLING UNIT ASSEMBLY

Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.

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 expansion valve for installation.

• After charging refrigerant, check for leaks. Refer to 

HA-21, "Leak Test"

.

PTC HEATER

HA-49

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PTC HEATER

Exploded View

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Removal and Installation

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REMOVAL

1. Remove the rear blower motor 1 unit assembly. Refer to 

VTL-20, "REAR BLOWER MOTOR 1 UNIT

ASSEMBLY : Removal and Installation"

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2. Disconnect the harness connectors from the PTC heater.
3. Remove the PTC heater screws, then remove the PTC heater.

INSTALLATION

Installation is in the reverse order of removal.

1.

Rear blower motor 1 unit assembly up-
per housing

2.

Rear shut-off door motor

3.

Rear blower motor 1 unit assembly lower 
housing

4.

Rear blower motor 1

5.

Mode door motor (rear)

6.

PTC heater

ALIIA0531ZZ

HA-50

< SERVICE DATA AND SPECIFICATIONS (SDS) 

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Compressor

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Oil

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Refrigerant

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Model

DKS-17DT

Type

Variable displacement swash plate

Displacement

175 cm

3

 (10.7 cu in)/rev

Number of cylinders

10

Cylinder bore diameter 

× stroke 

mm (in)

30.5 x 24 mm (1.2 x 0.9 in)

Direction of rotation

Clockwise (viewed from clutch)

Drive belt

Poly V 7 grooves

Disc to pulley clearance
mm (in)

Standard

0.3 – 0.6 mm (0.012 – 0.024 in)

Name

A/C System Oil Type S (DH-PS)

Capacity
m  (US fl oz, lmp fl oz)

Total in system

230 (7.8, 8.1)

Compressor (service part) charging 
amount

Refer to 

HA-26, "Oil Adjusting Procedure for 

Compressor Replacement"

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Type

HFC-134a (R-134a)

Capacity

0.83 

± 0.03 kg (1.83 ± 0.07 lb)