Nissan Pathfinder (2009 year). Instruction — 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 >
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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 >
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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 >
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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 >
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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
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