Nissan Pathfinder (2011 year). Manual - part 435

 

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Nissan Pathfinder (2011 year). Manual - part 435

 

 

HA-1

VENTILATION, HEATER & AIR CONDITIONER

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SECTION 

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CONTENTS

HEATER & AIR CONDITIONING SYSTEM

PRECAUTION ...............................................

3

PRECAUTIONS ...................................................

3

Precaution for Supplemental Restraint System 
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................
..

3

Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ...................................
..

3

Precaution for Work  ..................................................

4

Precaution for Working with HFC-134a (R-134a) ......

4

Contaminated Refrigerant  .........................................

4

General Refrigerant Precaution  ................................

5

Precaution for Leak Detection Dye  ...........................

5

A/C Identification Label  .............................................

5

Precaution for Refrigerant Connection ......................

5

Precaution for Service of Compressor  ....................

11

Precaution for Service Equipment ...........................

11

PREPARATION ...........................................

14

PREPARATION ..................................................

14

Special Service Tool  ...............................................

14

HFC-134a (R-134a) Service Tool and Equipment ....

14

Commercial Service Tool  ........................................

16

SYSTEM DESCRIPTION  .............................

18

REFRIGERATION SYSTEM  ..............................

18

Component ..............................................................

18

Refrigerant Cycle  ....................................................

22

Refrigerant System Protection ................................

23

OIL ......................................................................

24

Maintenance of Oil Quantity in Compressor  ...........

24

PERIODIC MAINTENANCE .........................

25

REFRIGERATION SYSTEM  ..............................

25

HFC-134a (R-134a) Service Procedure ..................

25

OIL ......................................................................

27

Maintenance of Oil Quantity in Compressor  ...........

27

FLUORESCENT LEAK DETECTOR  ................

29

Checking of Refrigerant Leaks ................................

29

Checking System for Leaks Using the Fluorescent 
Dye Leak Detector ...................................................

29

Dye Injection ............................................................

29

ELECTRICAL LEAK DETECTOR  ....................

31

Checking of Refrigerant Leaks ................................

31

Electronic Refrigerant Leak Detector .......................

31

REMOVAL AND INSTALLATION ...............

34

REFRIGERATION SYSTEM  .............................

34

Component ..............................................................

34

HFC-134a (R-134a) Service Procedure  ..................

36

COMPRESSOR .................................................

38

Removal and Installation for Compressor  ...............

38

Removal and Installation for Compressor Clutch ....

40

HIGH-PRESSURE FLEXIBLE HOSE  ...............

45

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

45

HIGH-PRESSURE PIPE ....................................

46

Removal and Installation for Front High-pressure 
A/C Pipe  ..................................................................

46

Removal and Installation for Rear High- and Low-
Pressure A/C Pipes  .................................................

46

Removal and Installation for Underfloor Rear 
High- and Low-Pressure A/C and Heater Core 
Pipes ........................................................................

46

LOW-PRESSURE FLEXIBLE HOSE ................

49

Removal and Installation for Front Low-Pressure 
Flexible A/C Hose ....................................................

49

LOW-PRESSURE PIPE  ....................................

50

Removal and Installation for Front Low-Pressure 
A/C Pipe  ..................................................................

50

Removal and Installation for Rear High- and Low-
Pressure A/C Pipes  .................................................

50

2011 Pathfinder

PRECAUTIONS

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< PRECAUTION >

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PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

INFOID:0000000006243572

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along

with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain

types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS

system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front

air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.

Information necessary to service the system safely is included in the SR and SB section of this Service Man-

ual.

WARNING:

• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision which would result in air bag inflation, all maintenance must be performed by

an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag

Module, see the SR section.

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-

ness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-

tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a

hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing

serious injury.

• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

Precaution Necessary for Steering Wheel Rotation After Battery Disconnect

INFOID:0000000006243573

NOTE:

• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-

TEM).

• Remove and install all control units after disconnecting both battery cables with the ignition knob in the

LOCK

 position.

• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.

If DTC is detected, perform trouble diagnosis according to self-diagnostic results.

For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-

anism is adopted on the key cylinder.

For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and

steering wheel rotation will become impossible.

If steering wheel rotation is required when battery power is interrupted, follow the procedure below before

starting the repair operation.

OPERATION PROCEDURE

1. Connect both battery cables.

NOTE:

Supply power using jumper cables if battery is discharged.

2. Use the Intelligent Key or mechanical key to turn the ignition switch to the 

ACC

 position. At this time, the

steering lock will be released.

3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be

rotated.

4. Perform the necessary repair operation.

2011 Pathfinder

HA-4

< PRECAUTION >

PRECAUTIONS

5. When the repair work is completed, return the ignition switch to the 

LOCK

 position before connecting

the battery cables. (At this time, the steering lock mechanism will engage.)

6. Perform a self-diagnosis check of all control units using CONSULT-III. 

Precaution for Work

INFOID:0000000008197583

• When removing or disassembling each component, be careful not to damage or deform it. If a component

may be subject to interference, be sure to protect it with a shop cloth.

• When removing (disengaging) components with a screwdriver or similar tool, be sure to wrap the component

with a shop cloth or vinyl tape to protect it.

• Protect the removed parts with a shop cloth and prevent them from being dropped.

• Replace a deformed or damaged clip.

• If a part is specified as a non-reusable part, always replace it with new one.

• Be sure to tighten bolts and nuts securely to the specified torque.

• After installation is complete, be sure to check that each part works properly.

• Follow the steps below to clean components.

- Water soluble dirt: Dip a soft cloth into lukewarm water, and wring the water out of the cloth to wipe the dirty

area.

Then rub with a soft and dry cloth.

- Oily dirt: Dip a soft cloth into lukewarm water with mild detergent (concentration: within 2 to 3%), and wipe

the dirty area.

Then dip a cloth into fresh water, and wring the water out of the cloth to wipe the detergent off. Then rub with

a soft and dry cloth.

• Do not use organic solvent such as thinner, benzene, alcohol, or gasoline.

• For genuine leather seats, use a genuine leather seat cleaner.

Precaution for Working with HFC-134a (R-134a)

INFOID:0000000006243574

WARNING:

• CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants

are mixed compressor failure is likely to occur. Refer to 

HA-4, "Contaminated Refrigerant"

. To deter-

mine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use refrigerant recovery/recy-

cling equipment and refrigerant identifier.

• Use only specified oil for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components. If

oil other than that specified is used, compressor failure is likely to occur.

• The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following

handling precautions must be observed:

- When removing refrigerant components from a vehicle, immediately cap (seal) the component to

minimize the entry of moisture from the atmosphere.

- When installing refrigerant components to a vehicle, do not remove the caps (unseal) until just

before connecting the components. Connect all refrigerant loop components as quickly as possible

to minimize the entry of moisture into system.

- Only use the specified oil from a sealed container. Immediately reseal containers of oil. Without

proper sealing, oil will become moisture saturated and should not be used.

- Avoid breathing A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and throat.

Remove HFC-134a (R-134a) from the A/C system using certified service equipment meeting require-

ments of SAE J2210 [HFC-134a (R-134a) recycling equipment], or SAE J2209 [HFC-134a (R-134a)

recovery equipment]. If accidental system discharge occurs, ventilate work area before resuming

service. Additional health and safety information may be obtained from refrigerant and oil manufac-

turers.

- Do not allow the refrigerant oil to come in contact with styrofoam parts. Damage may result.

Contaminated Refrigerant

INFOID:0000000006243575

If a refrigerant other than pure HFC-134a (R-134a) is identified in a vehicle, your options are:

• Explain to the customer that environmental regulations prohibit the release of contaminated refrigerant into

the atmosphere.

• Explain that recovery of the contaminated refrigerant could damage your service equipment and refrigerant

supply.

• Suggest the customer return the vehicle to the location of previous service where the contamination may

have occurred.

2011 Pathfinder

PRECAUTIONS

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• If you choose to perform the repair, recover the refrigerant using only 

dedicated equipment and contain-

ers. Do not recover contaminated refrigerant into your existing service equipment.

 If your facility does

not have dedicated recovery equipment, you may contact a local refrigerant product retailer for available ser-

vice. This refrigerant must be disposed of in accordance with all federal and local regulations. In addition,

replacement of all refrigerant system components on the vehicle is recommended.

• If the vehicle is within the warranty period, the air conditioner warranty is void. Please contact NISSAN Cus-

tomer Affairs for further assistance.

General Refrigerant Precaution

INFOID:0000000006243576

WARNING:

• Do not release refrigerant into the air. Use approved recovery/recycling equipment to capture the

refrigerant every time an air conditioning system is discharged.

• Always wear eye and hand protection (goggles and gloves) when working with any refrigerant or air

conditioning system.

• Do not store or heat refrigerant containers above 52

°

C (125

°

F).

• Do not heat a refrigerant container with an open flame; if container warming is required, place the

bottom of the container in a warm pail of water.

• Do not intentionally drop, puncture, or incinerate refrigerant containers.

• Keep refrigerant away from open flames: poisonous gas will be produced if refrigerant burns.

• Refrigerant will displace oxygen, therefore be certain to work in well ventilated areas to prevent suf-

focation.

• Do not pressure test or leak test HFC-134a (R-134a) service equipment and/or vehicle air condition-

ing systems with compressed air during repair. Some mixtures of air and HFC-134a (R-134a) have

been shown to be combustible at elevated pressures. These mixtures, if ignited, may cause injury or

property damage. Additional health and safety information may be obtained from refrigerant manu-

facturers.

Precaution for Leak Detection Dye

INFOID:0000000006243577

• The A/C system contains a fluorescent leak detection dye used for locating refrigerant leaks. An ultraviolet

(UV) lamp is required to illuminate the dye when inspecting for leaks.

• Always wear fluorescence enhancing UV safety goggles to protect your eyes and enhance the visibility of

the fluorescent dye.

• The fluorescent dye leak detector is not a replacement for an electronic refrigerant leak detector. The fluo-

rescent dye leak detector should be used in conjunction with an electronic refrigerant leak detector (J-

41995).

• For your safety and the customer's satisfaction, read and follow all manufacturer's operating instructions and

precautions prior to performing work.

• A compressor shaft seal should not be repaired because of dye seepage. The compressor shaft seal should

only be repaired after confirming the leak with an electronic refrigerant leak detector (J-41995).

• Always remove any remaining dye from the leak area after repairs are complete to avoid a misdiagnosis dur-

ing a future service.

• Do not allow dye to come into contact with painted body panels or interior components. If dye is spilled,

clean immediately with the approved dye cleaner. Fluorescent dye left on a surface for an extended period of

time 

cannot be removed

.

• Do not spray the fluorescent dye cleaning agent on hot surfaces (engine exhaust manifold, etc.).

• Do not use more than one refrigerant dye bottle (1/4 ounce / 7.4 cc) per A/C system.

• Leak detection dyes for HFC-134a (R-134a) and CFC-12 (R-12) A/C systems are different. Do not use HFC-

134a (R-134a) leak detection dye in CFC-12 (R-12) A/C systems or CFC-12 (R-12) leak detection dye in

HFC-134a (R-134a) A/C systems or A/C system damage may result.

• The fluorescent properties of the dye will remain for over three (3) years unless a compressor failure occurs.

A/C Identification Label

INFOID:0000000006243578

Vehicles with factory installed fluorescent dye have this identification label on the underside of hood.

Precaution for Refrigerant Connection

INFOID:0000000006243579

A new type refrigerant connection has been introduced to all refrigerant lines except the following locations.

• Expansion valve to cooling unit

• Evaporator pipes to evaporator (inside cooling unit)

2011 Pathfinder

HA-6

< PRECAUTION >

PRECAUTIONS

• Refrigerant pressure sensor

FEATURES OF NEW TYPE REFRIGERANT CONNECTION

• The O-ring has been relocated. It has also been provided with a groove for proper installation. This reduces

the possibility of the O-ring being caught in, or damaged by, the mating part. The sealing direction of the O-

ring is now set vertically in relation to the contacting surface of the mating part to improve sealing character-

istics.

• The reaction force of the O-ring will not occur in the direction that causes the joint to pull out, thereby facili-

tating piping connections.

O-RING AND REFRIGERANT CONNECTION

SHA815E

2011 Pathfinder

PRECAUTIONS

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< PRECAUTION >

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Front A/C Compressor and Condenser - VK56DE

AWIIA1537GB

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

Vehicle front

2011 Pathfinder

HA-8

< PRECAUTION >

PRECAUTIONS

Front A/C Compressor and Condenser - VQ40DE

AWIIA1538GB

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

Vehicle front

2011 Pathfinder

 

 

 

 

 

 

 

Content      ..     433      434      435      436     ..