Nissan Pathfinder (2008 year). Manual — part 431

LOW-PRESSURE PIPE

HA-51

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LOW-PRESSURE PIPE

Removal and Installation for Front Low-Pressure A/C Pipe

INFOID:0000000001689468

REMOVAL

1.

Discharge the refrigerant. Refer to

HA-37, "HFC-134a (R-134a) Service Procedure"

.

2.

Disconnect the heater pump connector.

3.

Remove the heater pump from the bracket and reposition out of the way. Do not disconnect the heater
hoses from the heater pump.

4.

Remove the front low-pressure A/C pipe. Refer to

HA-34, "Component"

.

CAUTION:

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.
Refer to

HA-34, "Component"

.

CAUTION:

• Replace the O-ring of the front low-pressure A/C pipe with a new one, then apply compressor oil to it

for installation.

• After charging refrigerant, check for leaks.

Removal and Installation for Rear High- and Low-Pressure A/C Pipes

INFOID:0000000001689495

REMOVAL

1.

Discharge the refrigerant. Refer to

HA-37, "HFC-134a (R-134a) Service Procedure"

.

2.

Remove the luggage side lower finisher RH. Refer to

INT-18, "Component"

.

3.

Remove the rear high- and low-pressure A/C pipes. Refer to

HA-34, "Component"

.

CAUTION:

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.
Refer to

HA-34, "Component"

.

CAUTION:

• Replace the O-ring of the rear high- and low-pressure A/C pipes with a new one, then apply compres-

sor oil to it for installation.

• After charging refrigerant, check for leaks.

Removal and Installation for Underfloor Rear High- and Low-Pressure A/C and Heater
Core Pipes

INFOID:0000000001689501

REMOVAL

1.

Release the fuel pressure. Refer to

EC-948, "Fuel Pressure Check"

.

2.

Drain the engine coolant. Refer to

CO-12, "Changing Engine Coolant"

(VQ40DE),

CO-39, "Changing

Engine Coolant"

(VK56DE).

3.

Disconnect the negative battery terminal.

4.

Discharge the refrigerant. Refer to

HA-37, "HFC-134a (R-134a) Service Procedure"

.

5.

Remove the rear bumper. Refer to

EXT-15, "Removal and Installation"

.

6.

Disconnect the fuel filler pipe and vent pipe from the lower fuel filler hose and fuel tank.

7.

Remove the front fender protector. Refer to

EXT-20, "Removal and Installation of Front Fender Protector"

.

8.

Disconnect the chassis harness connector.

9.

Remove the front and rear RH wheels and tires. Refer to

WT-36, "Rotation"

.

10. Disconnect the fuel feed hose quick connectors. Disconnect the quick connectors as follows:

• Hold the sides of the connector, push in the tabs and pull out the tube.
• If the connector and the tube are stuck together, push and pull several times until they start to move.

Then disconnect them by pulling.

HA-52

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LOW-PRESSURE PIPE

CAUTION:

• The quick connector can be disconnected when the tabs

are completely depressed. Do not twist the quick connec-
tor more than necessary.

• Do not use any tools to disconnect the quick connector.
• Keep the resin tube away from heat. Be especially careful

when welding near the tube.

• Prevent any acid liquids such as battery electrolyte, from

getting on the resin tube.

• Do not bend or twist the resin tube during connection.
• Do not remove the remaining retainer on the hard tube (or

the equivalent) except when the resin tube or the retainer
is replaced.

• When the resin tube or hard tube, or the equivalent, is

replaced, also replace the retainer with a new one (semi-
transparent colored retainer).

• To keep the quick connector clean and to avoid damage

and contamination from foreign materials, cover the quick
connector with plastic bags or suitable material as shown.

11. Disconnect the frame mounted brake tubes from the brake system. Refer to

BR-18, "Removal and Instal-

lation of Front Brake Piping and Brake Hose"

.

12. Remove the upper radiator mounting plates. Refer to

CO-16, "Removal and Installation"

(VQ40DE),

CO-

43, "Removal and Installation"

(VK54DE).

13. Disconnect the A/C lines ground strap.

14. Disconnect the exhaust system ground strap. Refer to

EX-5, "Removal and Installation"

.

15. Disconnect each end of the underfloor rear high- and low-pressure A/C and heater core pipes. Refer to

HA-34, "Component"

.

CAUTION:

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

16. Remove the front floor heat shield.

17. Remove the heater pipe heat shield.
18. Disconnect the steering column from the power steering gear. Refer to

ST-17, "Removal and Installation"

.

19. Set four suitable jacks at the body mount points to support the vehicle body when it is separated from the

frame.

20. Remove the body mount bolts. Refer to

BRM-8, "Body Mounting"

.

21. Use the vehicle hoist to lower the frame from the body [approximately 457 mm (18 in)] until there is suffi-

cient clearance for the underfloor rear high- and low-pressure A/C and heater core pipes from the body.

22. Remove the underfloor rear high- and low-pressure A/C and heater core pipes.

PBIC1268E

PBIC0163E

LOW-PRESSURE PIPE

HA-53

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INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• Replace the O-ring of the underfloor rear high- and low-pressure A/C and heater core pipes with a

new one, then apply compressor oil to it for installation.

• After charging refrigerant, check for leaks.
• Bleed the brake system. Refer to

BR-9, "Bleeding Brake System"

.

HA-54

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CONDENSER

CONDENSER

Removal and Installation for Condenser

INFOID:0000000001689470

REMOVAL

1.

Discharge the refrigerant. Refer to

HA-37, "HFC-134a (R-134a) Service Procedure"

.

2.

Remove the radiator. Refer to

CO-43, "Removal and Installation"

(VK56DE),

CO-16, "Removal and Instal-

lation"

(VQ40DE).

CAUTION:

Be careful not to damage the core surface of the condenser and the radiator.

3.

Disconnect the front high-pressure flexible A/C hose and the front high-pressure A/C pipe from the con-
denser.

CAUTION:

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

4.

Disconnect the refrigerant pressure sensor harness connector.

5.

Remove the refrigerant pressure sensor from the condenser.

6.

Lift the condenser out of the mounting grommets and remove
the condenser.

INSTALLATION

Installation is in the reverse order of removal.
Refer to

HA-34, "Component"

.

CAUTION:

• Replace the O-rings of the front high-pressure A/C pipe, refrigerant pressure sensor, and front high-

pressure flexible A/C hose with new ones, then apply compressor oil to them for installation.

• After charging refrigerant, check for leaks.
• Replace the mounting grommets as necessary.

LJIA0177E

REFRIGERANT PRESSURE SENSOR

HA-55

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REFRIGERANT PRESSURE SENSOR

Removal and Installation for Refrigerant Pressure Sensor

INFOID:0000000001689469

REMOVAL

1.

Discharge the refrigerant. Refer to

HA-37, "HFC-134a (R-134a) Service Procedure"

.

2.

Disconnect the refrigerant pressure sensor harness connector
and remove the refrigerant pressure sensor from the condenser.

CAUTION:

Be careful not to damage the condenser fins.

INSTALLATION

Installation is in the reverse order of removal.
Refer to

HA-34, "Component"

.

CAUTION:

• Be careful not to damage the condenser fins.
• Replace the O-ring of the refrigerant pressure sensor with a new one, then apply compressor oil to it

for installation.

• After charging refrigerant, check for leaks.

LJIA0177E

HA-56

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EXPANSION VALVE

EXPANSION VALVE

Removal and Installation for Front Expansion Valve

INFOID:0000000001689471

REMOVAL

1.

Discharge the refrigerant. Refer to

HA-37, "HFC-134a (R-134a) Service Procedure"

.

2.

Remove the front heater and cooling unit assembly. Refer to

VTL-18, "Removal and Installation"

.

3.

Remove the front heater core and evaporator pipes grommet.

4.

Remove the front expansion valve.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• Replace the O-rings on then front expansion valve and the A/C refrigerant pipes with new ones, then

apply compressor oil to them for installation.

• After charging refrigerant, check for leaks.

Expansion valve bolts

: Refer to

HA-34, "Component"

.

A/C refrigerant pipe to expansion valve bolt

: Refer to

HA-34, "Component"

.

AMBIENT SENSOR

HA-57

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AMBIENT SENSOR

Removal and Installation

INFOID:0000000001689473

REMOVAL

1.

Remove the front grille. Refer to

EXT-16, "Removal and Installation"

.

2.

Disconnect the ambient sensor (1) electrical connector.
•

⇐

: Front

NOTE:
The ambient sensor is located behind the front grille, below the
hood latch.

3.

Release the ambient sensor (1) clip and then remove the ambi-
ent sensor (1).

INSTALLATION

Installation is in the reverse order of removal.

AWIIA0262ZZ

HA-58

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HEATER PUMP

HEATER PUMP

Removal and Installation

INFOID:0000000001689472

Heater Pump

NOTE:
Only the VQ40DE engine is equipped with a heater pump for the rear heater system.

REMOVAL

1.

Partially drain the engine cooling system. Refer to

CO-12, "Changing Engine Coolant"

(VQ40DE),

CO-39,

"Changing Engine Coolant"

(VK56DE).

2.

Disconnect the heater pump electrical connector.

3.

Disconnect the two heater hoses.

4.

Remove the heater pump from the bracket securing the heater pump to the cowl top.

CAUTION:

Do not disassemble the heater pump, replace the heater pump as an assembly.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• The heater pump rubber mount must be fully seated on the bracket.
• Do not disassemble the heater pump, replace the heater pump as an assembly.

LBIA0414E

1.

Cowl top

2.

Heater pump electrical connector

3.

Heater pump

4.

Heater hose and clamp

5.

Heater hose and clamp