Content .. 44 45 46 47 ..

Nissan Pathfinder (2005 year). Manual - part 46

PREPARATION

ATC-15

ATC

2005 Pathfinder

—

(J-41995)
Electronic refrigerant leak detector

Power supply:

●

DC 12V (battery terminal)

—

(J-43926)
Refrigerant dye leak detection kit
Kit includes:
(J-42220)
UV lamp and UV safety goggles
(J-41459)
Refrigerant dye injector
(J-41447)
Fluorescent leak detection dye
(box of 24, 1/4 ounce bottles)
(J-43872)
Refrigerant dye cleaner

Power supply:

●

DC 12V (battery terminal)

—

(J-42220)
Fluorescent dye leak detector

Power supply:

●

DC 12V (battery terminal)

For checking refrigerant leak when flu-
orescent dye is installed in A/C system.
Includes: UV lamp and UV safety gog-
gles

—

(J-41447)
HFC-134a (R-134a) Fluorescent
leak detection dye
(Box of 24, 1/4 ounce bottles)

Application: For HFC-134a (R-134a)
PAG oil
Container: 1/4 ounce (7.4cc) bottle
(Includes self-adhesive dye identifica-
tion labels for affixing to vehicle after
charging system with dye.)

—

(J-41459)
HFC-134a (R-134a) Refrigerant
dye injector
Use with J-41447, 1/4 ounce bottle

For injecting 1/4 ounce of fluorescent
leak detection dye into A/C system.

—

(J-43872)
Refrigerant dye cleaner

For cleaning dye spills.

Tool number
(Kent-Moore No.)
Tool name

Description

AHA281A

ZHA200H

SHA438F

SHA439F

SHA440F

SHA441F

ATC-16

PREPARATION

2005 Pathfinder

—

(J-39183-C)
Manifold gauge set (with hoses
and couplers)

Identification:

●

The gauge face indicates R-134a.
Fitting size-Thread size

●

1/2”-16 ACME

Service hoses:

●

High side hose
(J-39500-72B)

●

Low side hose
(J-39500-72R)

●

Utility hose
(J-39500-72Y)

Hose color:

●

Low side hose: Blue with black stripe

●

High side hose: Red with black stripe

●

Utility hose: Yellow with black stripe
or green with black stripe
Hose fitting to gauge:

●

1/2”-16 ACME

Service couplers

●

High side coupler
(J-39500-20A)

●

Low side coupler
(J-39500-24A)

Hose fitting to service hose:

●

M14 x 1.5 fitting is optional or perma-
nently attached.

—

(J-39699)
Refrigerant weight scale

For measuring of refrigerant
Fitting size-Thread size

●

1/2”-16 ACME

—

(J-39649)
Vacuum pump
(Including the isolator valve)

Capacity:

●

Air displacement: 4 CFM

●

Micron rating: 20 microns

●

Oil capacity: 482 g (17 oz)
Fitting size-Thread size

●

1/2”-16 ACME

Tool number
(Kent-Moore No.)
Tool name

Description

RJIA0196E

S-NT201

S-NT202

S-NT200

S-NT203

PREPARATION

ATC-17

ATC

2005 Pathfinder

Commercial Service Tools

EJS003BC

Tool name

Description

(J-41810-NI)
Refrigerant identifier equipment (R-
134a)

For checking refrigerant purity and
system contamination

Power tool

Loosening bolts and nuts

(J-44614)
Clutch disc holding tool

Clutch disc holding tool

RJIA0197E

PBIC0190E

WHA230

ATC-18

REFRIGERATION SYSTEM

2005 Pathfinder

REFRIGERATION SYSTEM

PFP:KA990

Components

EJS002WJ

FRONT REFRIGERATION SYSTEM

WJIA1260E

REFRIGERATION SYSTEM

ATC-19

ATC

2005 Pathfinder

REAR REFRIGERATION SYSTEM

Defroster nozzle

LH side demister duct

LH ventilator duct

RH side demister duct

RH ventilator duct

Center ventilator duct

Front heater and cooling unit assembly

Floor connector duct grilles

Floor connector duct

10. Front floor ducts

11.

Rear floor ducts

Side rear floor duct

Rear heater and cooling unit assembly

Rear lower overhead duct

Rear upper overhead duct

LJIA0156E

ATC-20

REFRIGERATION SYSTEM

2005 Pathfinder

Refrigerant Cycle

EJS002WH

REFRIGERANT FLOW

The refrigerant flows in the standard pattern, that is, through the compressor, the condenser with liquid tank,
through the front and rear evaporators, and back to the compressor. The refrigerant evaporation through the
evaporator coils are controlled by front and rear externally equalized expansion valves, located inside the front
and rear evaporator cases.

FREEZE PROTECTION

The compressor cycles on and off to maintain the evaporator temperature within a specified range. When the
evaporator coil temperature falls below a specified point, the intake sensor interrupts the compressor opera-
tion. When the evaporator coil temperature rises above the specification, the intake sensor allows compressor
operation.

WJIA1342E

REFRIGERATION SYSTEM

ATC-21

ATC

2005 Pathfinder

Refrigerant System Protection

EJS002WI

REFRIGERANT PRESSURE SENSOR

The refrigerant system is protected against excessively high- or low-pressures by the refrigerant pressure sen-
sor, located on the condenser. If the system pressure rises above or falls below the specifications, the refriger-
ant pressure sensor detects the pressure inside the refrigerant line and sends a voltage signal to the ECM.
The ECM de-energizes the A/C relay to disengage the magnetic compressor clutch when pressure on the high
pressure side detected by refrigerant pressure sensor is over about 2,746 kPa (28 kg/cm

, 398 psi), or below

about 120 kPa (1.22 kg/cm

, 17.4 psi).

PRESSURE RELIEF VALVE

The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.
When the pressure of refrigerant in the system increases to an abnormal level [more than 2,990 kPa (30.5 kg/
cm

, 433.6 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant

into the atmosphere.

ATC-22

LUBRICANT

2005 Pathfinder

LUBRICANT

PFP:KLG00

Maintenance of Lubricant Quantity in Compressor

EJS002WK

The lubricant in the compressor circulates through the system with the refrigerant. Add lubricant to compres-
sor when replacing any component or after a large refrigerant leakage has occurred. It is important to maintain
the specified amount.
If lubricant quantity is not maintained properly, the following malfunctions may result:

●

Lack of lubricant: May lead to a seized compressor

●

Excessive lubricant: Inadequate cooling (thermal exchange interference)

LUBRICANT

Name: NISSAN A/C System Lubricant Type S (DH-PS) or equivalent
Part number: KLH00-PAGS0

CHECKING AND ADJUSTING

CAUTION:

If excessive lubricant leakage is noted, do not perform the lubricant return operation.
Start the engine and set the following conditions:

Test Condition

●

Engine speed: Idling to 1,200 rpm

●

A/C switch: On

●

Blower speed: Max. position

●

Temp. control: Optional [Set so that intake air temperature is 25

to 30

C (77

to 86

F)]

●

Intake position: Recirculation (

)

●

Perform lubricant return operation for about ten minutes

Adjust the lubricant quantity according to the following table.

Lubricant Adjusting Procedure for Components Replacement Except Compressor

After replacing any of the following major components, add the correct amount of lubricant to the system.

Amount of Lubricant to be Added

*1:

If refrigerant leak is small, no addition of lubricant is needed.

Lubricant Adjustment Procedure for Compressor Replacement

Before connecting recovery/recycling equipment to vehicle, check recovery/recycling equipment gauges.
No refrigerant pressure should be displayed. If NG, recover refrigerant from equipment lines.

Connect recovery/recycling equipment to vehicle. Confirm refrigerant purity in supply tank using recovery/
recycling equipment and refrigerant identifier. If NG, refer to

ATC-5, "Contaminated Refrigerant"

Confirm refrigerant purity in vehicle A/C system using recovery/recycling equipment and refrigerant identi-
fier. If NG, refer to

ATC-5, "Contaminated Refrigerant"

Discharge refrigerant into the refrigerant recovery/recycling equipment. Measure lubricant discharged into
the recovery/recycling equipment.

Drain the lubricant from the “old” (removed) compressor into a graduated container and recover the
amount of lubricant drained.

Drain the lubricant from the “new” compressor into a separate, clean container.

Part replaced

Lubricant to be added to system

Remarks

Amount of lubricant

(US fl oz, Imp fl oz)

Front evaporator

75 (2.5, 2.6)

—

Rear evaporator

75 (2.5, 2.6)

—

Condenser

75 (2.5, 2.6)

—

Liquid tank

5 (0.2, 0.2)

Add if compressor is not replaced.

In case of refrigerant leak

30 (1.0, 1.1)

Large leak

—

Small leak *1

Content .. 44 45 46 47 ..