Nissan Pathfinder (2007 year). Manual - part 319

CHASSIS AND BODY MAINTENANCE

MA-35

2007 Pathfinder

Checking Seat Belts, Buckles, Retractors, Anchors and Adjusters

ELS001P8

Check the seat belt buckles, webbing, retractors, anchors and adjusters. Replace any seat belt assembly as
necessary. Refer to

SB-10, "Seat Belt Inspection"

●

Check the seat belt anchors for loose mounting bolts, damage, or excessive wear.

●

Check the seat belt webbing for any damage, cuts, fraying, or excessive wear.

●

Check the retractor for smooth operation.

●

Check the function of the buckles by inserting the seat belt tongue and checking for proper engagement of
the buckle and press the button on the buckle to check for proper release of the seat belt tongue.

CAUTION:

●

After any collision, inspect all seat belt assemblies, including retractors and other attached com-
ponents, such as the guide rail set. NISSAN recommends replacing all seat belt assemblies in use
during a collision, unless they are not damaged and are inspected to confirm they are operating
properly after a minor collision.
Also inspect all seat belt assemblies that are not in use during a collision, and replace any compo-
nents if damaged or not operating properly. The seat belt pre-tensioner should be replaced even if
the seat belts are not in use during a frontal collision where the driver and passenger air bags
have been deployed.

●

If any component of the seat belt assembly is suspected of being damaged or not operating prop-
erly, do not repair the component. Replace the components as an assembly.

●

If the seat belt webbing is cut, frayed, or damaged then replace the seat belt assembly.

●

Never lubricate the seat belt buckle or tongue.

●

When replacing any seat belt assembly always use a Genuine NISSAN seat belt assembly.

MA-36

CHASSIS AND BODY MAINTENANCE

2007 Pathfinder

MTC-1

MANUAL AIR CONDITIONER

J AIR CONDITIONER

CONTENTS

SECTION

MTC

MTC

2007 Pathfinder

PRECAUTIONS .......................................................... 4

Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 4
Precautions for Working with HFC-134a (R-134a)

..... 4

Contaminated Refrigerant  ........................................ 4
General Refrigerant Precautions .............................. 5
Precautions for Leak Detection Dye ......................... 5
A/C Identification Label  ............................................ 5
Precautions for Refrigerant Connection  ................... 5

FEATURES OF NEW TYPE REFRIGERANT
CONNECTION ...................................................... 6
O-RING AND REFRIGERANT CONNECTION ..... 7

Precautions for Servicing Compressor ..................... 9
Precautions for Service Equipment .......................... 9

RECOVERY/RECYCLING EQUIPMENT .............. 9
ELECTRONIC LEAK DETECTOR  ........................ 9
VACUUM PUMP  ................................................. 10
MANIFOLD GAUGE SET .................................... 10
SERVICE HOSES ............................................... 10
SERVICE COUPLERS .........................................11
REFRIGERANT WEIGHT SCALE  .......................11
CHARGING CYLINDER .......................................11

PREPARATION ......................................................... 12

Special Service Tools ............................................. 12
HFC-134a (R-134a) Service Tools and Equipment

... 12

Commercial Service Tools ...................................... 15

REFRIGERATION SYSTEM ..................................... 16

Components ........................................................... 16

REFRIGERATION SYSTEM ............................... 16

Refrigerant Cycle ................................................... 17

REFRIGERANT FLOW ....................................... 17
FREEZE PROTECTION ..................................... 17

Refrigerant System Protection ............................... 17

REFRIGERANT PRESSURE SENSOR ............. 17
PRESSURE RELIEF VALVE ............................... 18

OIL ............................................................................ 19

Maintenance of Oil Quantity in Compressor .......... 19

OIL ...................................................................... 19
CHECKING AND ADJUSTING ........................... 19

AIR CONDITIONER CONTROL ............................... 22

Description .............................................................. 22
Operation ................................................................ 22

AIR MIX DOOR CONTROL ................................. 22
BLOWER SPEED CONTROL  ............................. 22
INTAKE DOORS CONTROL  ............................... 22
MODE DOOR CONTROL  ................................... 22
DEFROSTER DOOR CONTROL  ........................ 22
MAGNET CLUTCH CONTROL  ........................... 22

Description of Control System ................................ 24
Control Operation ................................................... 25

Discharge Air Flow ................................................. 26

FRONT ................................................................ 26

System Description ................................................. 27

SWITCHES AND THEIR CONTROL FUNCTION ... 27

CAN Communication System Description .............. 28

TROUBLE DIAGNOSIS ............................................ 29

CONSULT-II Function (BCM) ................................. 29

CONSULT-II START PROCEDURE .................... 29
DATA MONITOR ................................................. 29

How to Perform Trouble Diagnosis for Quick and
Accurate Repair ...................................................... 29

WORK FLOW ...................................................... 29
SYMPTOM TABLE .............................................. 29

Component Parts and Harness Connector Location ... 31

ENGINE COMPARTMENT .................................. 31
PASSENGER COMPARTMENT ......................... 32

Schematic ............................................................... 33
Wiring Diagram — A/C,M — ................................... 34
Front Air Control Terminals and Reference Values ... 38

FRONT AIR CONTROL HARNESS CONNEC-

MTC-2

2007 Pathfinder

TOR TERMINAL LAYOUT ................................... 38
TERMINALS AND REFERENCE VALUES FOR
FRONT AIR CONTROL ....................................... 38

Operational Check .................................................. 39

CHECKING BLOWER  ......................................... 39
CHECKING DISCHARGE AIR  ............................ 39
CHECKING RECIRCULATION ............................ 39
CHECKING TEMPERATURE DECREASE  ......... 39
CHECKING TEMPERATURE INCREASE  .......... 39
CHECK A/C SWITCH  .......................................... 39

Power Supply and Ground Circuit for Front Air Con-
trol ........................................................................... 40

INSPECTION FLOW ........................................... 40
COMPONENT DESCRIPTION ............................ 41
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM ... 41

Mode Door Motor Circuit ........................................ 43

INSPECTION FLOW  ........................................... 43
SYSTEM DESCRIPTION  .................................... 44
COMPONENT DESCRIPTION ............................ 44
DIAGNOSTIC PROCEDURE FOR MODE
DOOR MOTOR  ................................................... 45

Air Mix Door Motor Circuit ...................................... 47

INSPECTION FLOW ........................................... 47
SYSTEM DESCRIPTION .................................... 49
COMPONENT DESCRIPTION ............................ 49
DIAGNOSTIC PROCEDURE FOR AIR MIX
DOOR MOTOR (FRONT) .................................... 50

Intake Door Motor Circuit ........................................ 52

INSPECTION FLOW  ........................................... 52
SYSTEM DESCRIPTION  .................................... 53
COMPONENT DESCRIPTION ............................ 53
DIAGNOSTIC PROCEDURE FOR INTAKE
DOOR MOTOR  ................................................... 54

Front Blower Motor Circuit ...................................... 56

INSPECTION FLOW  ........................................... 56
SYSTEM DESCRIPTION  .................................... 57
COMPONENT DESCRIPTION ............................ 57
DIAGNOSTIC PROCEDURE FOR BLOWER
MOTOR ............................................................... 58
COMPONENT INSPECTION  .............................. 62

Magnet Clutch Circuit ............................................. 64

INSPECTION FLOW ........................................... 64
SYSTEM DESCRIPTION .................................... 65
DIAGNOSTIC PROCEDURE FOR MAGNET
CLUTCH .............................................................. 65

Insufficient Cooling ................................................. 69

INSPECTION FLOW  ........................................... 69
PERFORMANCE TEST DIAGNOSES  ................ 71
PERFORMANCE CHART  ................................... 73
TROUBLE DIAGNOSES FOR UNUSUAL PRES-
SURE ................................................................... 74

Insufficient Heating ................................................. 77

INSPECTION FLOW ........................................... 77

Noise ...................................................................... 79

INSPECTION FLOW ........................................... 79

Intake Sensor Circuit .............................................. 81

COMPONENT DESCRIPTION ............................ 81
DIAGNOSTIC PROCEDURE FOR INTAKE SEN-

SOR .....................................................................81
COMPONENT INSPECTION ...............................82

CONTROL UNIT ........................................................83

Removal and Installation .........................................83

FRONT AIR CONTROL .......................................83

INTAKE SENSOR ......................................................84

Removal and Installation .........................................84

REMOVAL ............................................................84
INSTALLATION ....................................................84

BLOWER MOTOR .....................................................85

Components ............................................................85
Removal and Installation .........................................85

REMOVAL ............................................................85
INSTALLATION ....................................................85

IN-CABIN MICROFILTER ..........................................86

Removal and Installation .........................................86

FUNCTION ..........................................................86
REPLACEMENT TIMING ....................................86
REPLACEMENT PROCEDURE ..........................86

HEATER & COOLING UNIT ASSEMBLY .................88

Components ............................................................88
Removal and Installation .........................................88

REMOVAL ............................................................88
INSTALLATION ....................................................89

HEATER CORE .........................................................90

Components ............................................................90
Removal and Installation .........................................90

REMOVAL ............................................................90
INSTALLATION ....................................................90

INTAKE DOOR MOTOR ............................................91

Removal and Installation .........................................91

REMOVAL ............................................................91
INSTALLATION ....................................................91

MODE DOOR MOTOR ..............................................92

Removal and Installation .........................................92

REMOVAL ............................................................92
INSTALLATION ....................................................92

AIR MIX DOOR MOTOR ...........................................93

Components ............................................................93
Removal and Installation .........................................93

REMOVAL ............................................................93
INSTALLATION ....................................................93

FRONT BLOWER MOTOR RESISTOR ....................94

Removal and Installation .........................................94

REMOVAL ............................................................94
INSTALLATION ....................................................94

DUCTS AND GRILLES .............................................95

Components ............................................................95
Removal and Installation .........................................96

CONSOLE DUCTS AND CONSOLE GRILLE  .....96
DEFROSTER NOZZLE ........................................97
RH AND LH SIDE DEMISTER DUCTS  ...............97
RH AND LH VENTILATOR DUCTS  .....................97
CENTER VENTILATOR DUCT  ............................97
FLOOR CONNECTOR DUCT  .............................97
FRONT AND REAR FLOOR DUCTS  ..................97
GRILLES ..............................................................98

REFRIGERANT LINES .............................................99

HFC-134a (R-134a) Service Procedure ..................99

MTC-3

MTC

2007 Pathfinder

SETTING OF SERVICE TOOLS AND EQUIP-
MENT .................................................................. 99

Components ......................................................... 101
Removal and Installation for Compressor ............ 102

COMPONENTS ................................................ 102
REMOVAL ......................................................... 102
INSTALLATION ................................................. 102

Removal and Installation for Compressor Clutch . 103

REMOVAL ......................................................... 103
INSPECTION .................................................... 104
INSTALLATION ................................................. 104
BREAK-IN OPERATION ................................... 106

Removal and Installation for High-pressure Flexible
A/C Hose .............................................................. 106

REMOVAL ......................................................... 106
INSTALLATION ................................................. 106

Removal and Installation for High-pressure A/C
Pipe ...................................................................... 106

REMOVAL ......................................................... 106
INSTALLATION ................................................. 106

Removal and Installation for Low-pressure Flexible
A/C Hose .............................................................. 106

REMOVAL ......................................................... 106
INSTALLATION ................................................. 106

Removal and Installation for Low-pressure A/C Pipe

. 107

REMOVAL ......................................................... 107
INSTALLATION ................................................. 107

Removal and Installation for Refrigerant Pressure

Sensor .................................................................. 107

REMOVAL ......................................................... 107
INSTALLATION ................................................. 107

Removal and Installation for Condenser .............. 107

REMOVAL ......................................................... 107
INSTALLATION ................................................. 108

Removal and Installation for Evaporator .............. 109

REMOVAL ......................................................... 110
INSTALLATION ................................................. 110

Removal and Installation for Expansion Valve ...... 110

REMOVAL ......................................................... 110
INSTALLATION ................................................. 110

Checking for Refrigerant Leaks ............................ 110
Checking System for Leaks Using the Fluorescent
Dye Leak Detector ................................................ 110
Dye Injection ..........................................................111
Electronic Refrigerant Leak Detector .....................111

PRECAUTIONS FOR HANDLING LEAK
DETECTOR ........................................................111
CHECKING PROCEDURE ............................... 112

SERVICE DATA AND SPECIFICATIONS (SDS) .... 114

Service Data and Specifications (SDS) ................ 114

COMPRESSOR ................................................ 114
OIL ..................................................................... 114
REFRIGERANT ................................................. 114
ENGINE IDLING SPEED .................................. 114
BELT TENSION ................................................. 114

MTC-4

PRECAUTIONS

2007 Pathfinder

PRECAUTIONS

PFP:00001

Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”

EJS004QR

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 SRS 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 per-
formed by an authorized NISSAN/INFINITI dealer.

●

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS 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
harness connectors.

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

EJS004QS

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

MTC-4, "Contaminated Refrigerant"

. To

determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use Refrigerant
Recovery/Recycling Recharging 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 possi-
ble 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
requirements 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 manufacturers.

–

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

Contaminated Refrigerant

EJS004QT

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 refriger-
ant supply.

●

Suggest the customer return the vehicle to the location of previous service where the contamination may
have occurred.

●

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

PRECAUTIONS

MTC-5

MTC

2007 Pathfinder

does not have dedicated recovery equipment, you may contact a local refrigerant product retailer for avail-
able service. 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
Customer Affairs for further assistance.

General Refrigerant Precautions

EJS004QU

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
suffocation.

●

Do not pressure test or leak test HFC-134a (R-134a) service equipment and/or vehicle air condi-
tioning 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 refriger-
ant manufacturers.

Precautions for Leak Detection Dye

EJS004QV

●

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
during 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

EJS004QW

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

Precautions for Refrigerant Connection

EJS004QX

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

MTC-6

PRECAUTIONS

2007 Pathfinder

●

Expansion valve to cooling unit

●

Evaporator pipes to evaporator (inside cooling unit)

●

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
characteristics.

●

The reaction force of the O-ring will not occur in the direction that causes the joint to pull out, thereby facil-
itating piping connections.

SHA815E

Content .. 317 318 319 320 ..