Nissan Pathfinder (2009 year). Manual — part 445

HA-14

< PREPARATION >

PREPARATION

KV991J0130
(ACR2005-NI)
ACR A/C Service Center

Refrigerant Recovery and Recycling
and Recharging

—

(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.

Tool number
(Kent-Moore No.)
Tool name

Description

WJIA0293E

AHA281A

ZHA200H

SHA438F

SHA439F

SHA440F

2009 Pathfinder

PREPARATION

HA-15

< PREPARATION >

C

D

E

F

G

H

J

K

L

M

A

B

HA

N

O

P

Commercial Service Tool

INFOID:0000000003935701

—

(J-43872)
Refrigerant dye cleaner

For cleaning dye spills.

—

(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

SHA441F

RJIA0196E

S-NT201

S-NT202

S-NT200

S-NT203

2009 Pathfinder

HA-16

< PREPARATION >

PREPARATION

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

PIIB1407E

WHA230

2009 Pathfinder

REFRIGERATION SYSTEM

HA-17

< FUNCTION DIAGNOSIS >

C

D

E

F

G

H

J

K

L

M

A

B

HA

N

O

P

FUNCTION DIAGNOSIS

REFRIGERATION SYSTEM

Component

INFOID:0000000003935702

CAUTION:

The new and former refrigerant connections use different O-ring configurations. Do not confuse O-
rings since they are not interchangeable. If a wrong O-ring is installed, refrigerant will leak at or
around the connection.

FRONT REFRIGERATION SYSTEM

2009 Pathfinder

HA-18

< FUNCTION DIAGNOSIS >

REFRIGERATION SYSTEM

Front A/C Compressor and Condenser - VK56DE

AWIIA0570GB

1.

High-pressure service valve

2.

Clip

3.

Front high-pressure A/C pipe

4.

Refrigerant pressure sensor

5.

Condenser

6.

Compressor shaft seal

7.

Front high-pressure flexible A/C hose

8.

Front low-pressure flexible A/C hose

9.

Low-pressure service valve

10. Front low-pressure A/C pipe

11.

Front expansion valve

12. Front A/C drain hose

P.

Refrigerant leak checking order (a - k)

Q.

Tightening torque

R.

Wrench size

2009 Pathfinder

REFRIGERATION SYSTEM

HA-19

< FUNCTION DIAGNOSIS >

C

D

E

F

G

H

J

K

L

M

A

B

HA

N

O

P

Front A/C Compressor and Condenser - VQ40DE

S.

O-ring size

T.

Former type refrigerant connection

U.

New type refrigerant connection

Front

WJIA1399E

1.

High-pressure service valve

2.

Clip

3.

Front high-pressure A/C pipe

4.

Refrigerant pressure sensor

5.

Condenser

6.

Compressor shaft seal

7.

Front high-pressure flexible A/C hose

8.

Front low-pressure flexible A/C hose

9.

Low-pressure service valve

10. Front low-pressure A/C pipe

11.

Front expansion valve

12. Front A/C drain hose

2009 Pathfinder

HA-20

< FUNCTION DIAGNOSIS >

REFRIGERATION SYSTEM

REAR REFRIGERATION SYSTEM

Rear A/C

WJIA1400E

1.

Rear high- and low-pressure A/C pipes

2.

Rear heater core hoses

3.

Underfloor rear high- and low-pres-
sure A/C and heater core pipes

4.

Rear expansion valve

2009 Pathfinder

REFRIGERATION SYSTEM

HA-21

< FUNCTION DIAGNOSIS >

C

D

E

F

G

H

J

K

L

M

A

B

HA

N

O

P

Refrigerant Cycle

INFOID:0000000003935703

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.

Refrigerant System Protection

INFOID:0000000003935704

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.

WJIA1342E

2009 Pathfinder