Nissan Pathfinder (2005 year). Instruction — part 46
PREPARATION
ATC-15
C
D
E
F
G
H
I
K
L
M
A
B
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
C
D
E
F
G
H
I
K
L
M
A
B
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
C
D
E
F
G
H
I
K
L
M
A
B
ATC
2005 Pathfinder
REAR REFRIGERATION SYSTEM
1.
Defroster nozzle
2.
LH side demister duct
3.
LH ventilator duct
4.
RH side demister duct
5.
RH ventilator duct
6.
Center ventilator duct
7.
Front heater and cooling unit assembly
8.
Floor connector duct grilles
9.
Floor connector duct
10. Front floor ducts
11.
Rear floor ducts
1.
Side rear floor duct
2.
Rear heater and cooling unit assembly
3.
Rear lower overhead duct
4.
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
C
D
E
F
G
H
I
K
L
M
A
B
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
2
, 398 psi), or below
about 120 kPa (1.22 kg/cm
2
, 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
2
, 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
1.
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.
2.
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"
.
3.
Confirm refrigerant purity in vehicle A/C system using recovery/recycling equipment and refrigerant identi-
fier. If NG, refer to
ATC-5, "Contaminated Refrigerant"
.
4.
Discharge refrigerant into the refrigerant recovery/recycling equipment. Measure lubricant discharged into
the recovery/recycling equipment.
5.
Drain the lubricant from the “old” (removed) compressor into a graduated container and recover the
amount of lubricant drained.
6.
Drain the lubricant from the “new” compressor into a separate, clean container.
Part replaced
Lubricant to be added to system
Remarks
Amount of lubricant
m
(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
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