Nissan Pathfinder (2007 year). Manual - part 332

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MTC

2007 Pathfinder

Removal and Installation for Compressor Clutch

EJS004SF

Magnet Clutch Assembly

REMOVAL

1.

Remove the compressor. Refer to 

MTC-102, "Removal and Installation for Compressor"

 .

2.

Remove the center bolt while holding the clutch disc stationary
using Tool as shown.

3.

Remove the clutch disc.

4.

Remove the snap ring using external snap ring pliers or suitable
tool.

WJIA1162E

1.

Magnet clutch assembly

2.

Magnet coil

3.

Pulley

4.

Clutch disc

5.

Snap ring

6.

Thermal protector (built in)

7.

Compressor

Tool number

: J-44614

WHA228

RHA072C

MTC-104

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2007 Pathfinder

5.

Remove the pulley using Tool with a small adapter. Position the
small adapter on the end of the drive shaft and the center of the
puller on the small adapter.

CAUTION:

To prevent deformation of the pulley groove, the puller
claws should be hooked under the pulley groove and not
into the pulley groove.

6.

Remove the magnet coil harness clip using a screwdriver,
remove the three magnet coil fixing screws and remove the
magnet coil.

INSPECTION
Clutch Disc

If the contact surface shows signs of damage due to excessive heat,
replace clutch disc and pulley.

Pulley

Check the appearance of the pulley assembly. If contact surface of pulley shows signs of excessive grooving,
replace clutch disc and pulley. The contact surfaces of the pulley assembly should be cleaned with a suitable
solvent before reinstallation.

Coil

Check magnet coil for loose connections or any cracked insulation.

INSTALLATION

1.

Install the magnet coil.

CAUTION:

Be sure to align the magnet coil pin with the hole in the
compressor front head.

Tool number

: KV99233130 (J-29884)

WJIA1017E

WHA212

WHA183

WHA213

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MTC

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2.

Install the magnet coil harness clip using a screwdriver.

3.

Install the pulley assembly using Tool and a wrench, then install
the snap ring using snap ring pliers.

4.

Install the clutch disc on the compressor shaft, together with the
original shim(s). Press the clutch disc down by hand.

5.

Install the clutch pulley bolt using Tool, to prevent the clutch disc
from turning and tighten the bolt to specification. Refer to 

MTC-

102, "COMPONENTS"

 .

CAUTION:

After tightening the clutch pulley bolt, check that the clutch
pulley rotates smoothly.

6.

Check the pulley clearance all the way around the clutch disc as
shown.

7.

If the specified clearance is not obtained, replace the adjusting
spacer to readjust.

8.

Install the compressor. Refer to 

MTC-102, "Removal and Instal-

lation for Compressor"

 .

Tool number

:

—

(J-38873-A)

WJIA1016E

WHA184

Tool number

: J-44614

WHA229

Clutch disc-to-pulley clearance

: 0.3 - 0.6 mm 
(0.012 - 0.024 in)

WHA194

MTC-106

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2007 Pathfinder

BREAK-IN OPERATION

When replacing compressor clutch assembly, always conduct the break-in operation. This is done by engag-
ing and disengaging the clutch about 30 times. Break-in operation raises the level of transmitted torque.

Removal and Installation for High-pressure Flexible A/C Hose

EJS004SG

REMOVAL

1.

Remove the front left wheel and tire assembly. Refer to 

WT-7, "Rotation"

 .

2.

Remove the front left mud guard.

3.

Remove the front left splash shield.

4.

Discharge the refrigerant. Refer to 

MTC-99, "HFC-134a (R-134a) Service Procedure"

 .

5.

Remove the high-pressure flexible A/C hose. Refer to 

MTC-106, "Removal and Installation for High-pres-

sure Flexible A/C Hose"

 .

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 

MTC-101, "Components"

 .

CAUTION:

●

Replace the O-ring of the high-pressure flexible A/C hose with a new one, then apply compressor
oil to it for installation.

●

After charging refrigerant, check for leaks.

Removal and Installation for High-pressure A/C Pipe

EJS004SH

REMOVAL

1.

Remove the front right wheel and tire assembly. Refer to 

WT-7, "Rotation"

 .

2.

Remove the front right mud guard.

3.

Remove the front right splash shield.

4.

Discharge the refrigerant. Refer to 

MTC-99, "HFC-134a (R-134a) Service Procedure"

 .

5.

Remove the low pressure A/C pipe. Refer to 

MTC-107, "Removal and Installation for Low-pressure A/C

Pipe"

 .

6.

Remove the high-pressure A/C pipe. Refer to 

MTC-101, "Components"

 .

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 

MTC-101, "Components"

 .

CAUTION:

●

Replace the O-ring of the high-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 Low-pressure Flexible A/C Hose

EJS004SI

REMOVAL

1.

Remove the front right wheel and tire assembly. Refer to 

WT-7, "Rotation"

 .

2.

Remove the front right mud guard.

3.

Remove the front right splash shield.

4.

Discharge the refrigerant. Refer to 

MTC-99, "HFC-134a (R-134a) Service Procedure"

 .

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 low-pressure flexible A/C hose. Refer to 

MTC-106, "Removal and Installation for Low-pres-

sure Flexible A/C Hose"

 .

INSTALLATION

Installation is in the reverse order of removal.

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MTC

2007 Pathfinder

Refer to 

MTC-101, "Components"

 .

CAUTION:

●

Replace the O-ring of the low-pressure flexible A/C hose with a new one, then apply compressor
oil to it for installation.

●

After charging refrigerant, check for leaks.

Removal and Installation for Low-pressure A/C Pipe

EJS004SJ

REMOVAL

1.

Discharge the refrigerant. Refer to 

MTC-99, "HFC-134a (R-134a) Service Procedure"

 .

2.

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

MTC-101, "Components"

 .

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 

MTC-101, "Components"

 .

CAUTION:

●

Replace the O-ring of the 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 Refrigerant Pressure Sensor

EJS004SK

REMOVAL

1.

Discharge the refrigerant. Refer to 

MTC-99, "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 

MTC-101, "Components"

 .

CAUTION:

●

Replace the O-ring of the refrigerant pressure sensor with a new one, then apply compressor oil to
it for installation.

●

Be careful not to damage the condenser fins.

●

After charging refrigerant, check for leaks.

Removal and Installation for Condenser

EJS004SL

REMOVAL

1.

Discharge the refrigerant. Refer to 

MTC-99, "HFC-134a (R-134a) Service Procedure"

 .

2.

Remove the radiator. Refer to 

CO-14, "RADIATOR"

 .

CAUTION:

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

3.

Disconnect the high-pressure flexible A/C hose and the high-pressure A/C pipe from the condenser.

CAUTION:

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

LJIA0177E

MTC-108

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2007 Pathfinder

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 

MTC-101, "Components"

 .

CAUTION:

●

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

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Removal and Installation for Evaporator

EJS004SM

Heater and Cooling Unit Assembly

LJIA0178E

1.

Center ventilator connector duct

2.

Heater core cover

3.

Intake air case

4.

Heater core and evaporator pipes 
bracket

5.

Heater core and evaporator pipes 
grommet

6.

Heater core

7.

Upper heater and cooling unit case

8.

Expansion valve

9.

Evaporator

10. Lower heater and cooling unit case

11.

Blower motor resistor

12. Blower motor

MTC-110

REFRIGERANT LINES

2007 Pathfinder

REMOVAL

1.

Remove the heater core. Refer to 

MTC-90, "HEATER CORE"

 .

2.

Separate the heater and cooling unit case.

3.

Remove the evaporator.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

Replace the O-rings on the A/C low-pressure flexible A/C hose and the high-pressure A/C pipe with
new ones. Apply compressor oil to the O-rings for installation.

Removal and Installation for Expansion Valve

EJS004SN

REMOVAL

1.

Discharge the refrigerant. Refer to 

MTC-99, "HFC-134a (R-134a) Service Procedure"

 .

2.

Remove the heater and cooling unit assembly. Refer to 

MTC-88, "HEATER & COOLING UNIT ASSEM-

BLY"

 .

3.

Remove the heater core and evaporator pipes grommet.

4.

Remove the expansion valve.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

●

Replace the O-rings on then 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.

Checking for Refrigerant Leaks

EJS004SO

Perform a visual inspection of all refrigeration parts, fittings, hoses and components for signs of A/C oil leak-
age, damage, and corrosion. Any A/C oil leakage may indicate an area of refrigerant leakage. Allow extra
inspection time in these areas when using either an electronic refrigerant leak detector (J-41995) or fluores-
cent dye leak detector (J-42220).
If any dye is observed using a fluorescent dye leak detector (J-42220), confirm the leak using a electronic
refrigerant leak detector (J-41995). It is possible that the dye is from a prior leak that was repaired and not
properly cleaned.
When searching for leaks, do not stop when one leak is found but continue to check for additional leaks at all
system components and connections.
When searching for refrigerant leaks using an electronic refrigerant leak detector (J-41995), move the probe
along the suspected leak area at 25 - 50 mm (1 - 2 in) per second and no further than 6 mm (1/4 in) from the
component.

CAUTION:

Moving the electronic refrigerant leak detector probe slower and closer to the suspected leak area will
improve the chances of finding a leak.

Checking System for Leaks Using the Fluorescent Dye Leak Detector

EJS004SP

1.

Check the A/C system for leaks using the fluorescent dye leak detector and safety goggles (J-42220) in a
low sunlight area (area without windows preferable). Illuminate all components, fittings and lines. The dye
will appear as a bright green/yellow area at the point of leakage. Fluorescent dye observed at the evapo-
rator drain opening indicates an evaporator core assembly leak (tubes, core or expansion valve).

2.

If the suspected area is difficult to see, use an adjustable mirror or wipe the area with a clean shop rag or
cloth, then inspect the shop rag or cloth with the fluorescent dye leak detector (J-42220) for dye residue.

3.

After the leak is repaired, remove any residual dye using refrigerant dye cleaner (J-43872) to prevent
future misdiagnosis.

Expansion valve bolts

: Refer to 

MTC-101, "Components"

 

.

A/C refrigerant pipe to expansion valve bolt

: Refer to 

MTC-101, "Components"

 

.