Nissan Pathfinder (2006) Manual de Usario
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MTC-1
MANUAL AIR CONDITIONER
J AIR CONDITIONER
CONTENTS
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Revision: September 2005 2006 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
TEMPERATURE CONTROL DIAL (TEMPERA-
TURE CONTROL) ............................................... 25
RECIRCULATION () SWITCH ............................. 25
DEFROSTER () SWITCH .................................... 25
REAR WINDOW DEFOGGER SWITCH ............. 25
OFF SWITCH (BLOWER SPEED SET TO 0) ..... 25
A/C SWITCH ....................................................... 25
MODE DIAL ......................................................... 25
FRONT BLOWER CONTROL DIAL .................... 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 BASIC OPERATION ....................... 29
DATA MONITOR ................................................. 30
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ...................................................... 31
WORK FLOW ...................................................... 31
SYMPTOM TABLE .............................................. 31
Component Parts and Harness Connector Location ... 32
ENGINE COMPARTMENT .................................. 32
PASSENGER COMPARTMENT ......................... 33
Schematic ............................................................... 34
Wiring Diagram — A/C,M — ................................... 35
Front Air Control Terminals and Reference Value ... 39
PIN CONNECTOR TERMINAL LAYOUT ............ 39
MTC-2
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TERMINALS AND REFERENCE VALUE FOR
FRONT AIR CONTROL ....................................... 39
Operational Check .................................................. 40
CHECKING BLOWER ......................................... 40
CHECKING DISCHARGE AIR ............................ 40
DISCHARGE AIR FLOW ..................................... 40
CHECKING RECIRCULATION ............................ 40
CHECKING TEMPERATURE DECREASE ......... 40
CHECKING TEMPERATURE INCREASE .......... 40
CHECK A/C SWITCH .......................................... 41
Power Supply and Ground Circuit for Front Air Con-
trol ........................................................................... 42
INSPECTION FLOW ........................................... 42
COMPONENT DESCRIPTION ............................ 43
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM ... 43
Mode Door Motor Circuit ........................................ 45
INSPECTION FLOW ........................................... 45
SYSTEM DESCRIPTION .................................... 45
COMPONENT DESCRIPTION ............................ 46
DIAGNOSTIC PROCEDURE FOR MODE
DOOR MOTOR ................................................... 47
Air Mix Door Motor Circuit ...................................... 49
INSPECTION FLOW ........................................... 49
SYSTEM DESCRIPTION .................................... 50
COMPONENT DESCRIPTION ............................ 50
DIAGNOSTIC PROCEDURE FOR AIR MIX
DOOR MOTOR (FRONT) .................................... 51
Intake Door Motor Circuit ........................................ 53
INSPECTION FLOW ........................................... 53
SYSTEM DESCRIPTION .................................... 54
COMPONENT DESCRIPTION ............................ 54
DIAGNOSTIC PROCEDURE FOR INTAKE
DOOR MOTOR ................................................... 55
Front Blower Motor Circuit ...................................... 57
INSPECTION FLOW ........................................... 57
SYSTEM DESCRIPTION .................................... 58
COMPONENT DESCRIPTION ............................ 58
DIAGNOSTIC PROCEDURE FOR BLOWER
MOTOR ............................................................... 59
COMPONENT INSPECTION .............................. 63
Magnet Clutch Circuit ............................................. 65
INSPECTION FLOW ........................................... 65
SYSTEM DESCRIPTION .................................... 66
DIAGNOSTIC PROCEDURE FOR MAGNET
CLUTCH .............................................................. 66
Insufficient Cooling ................................................. 70
INSPECTION FLOW ........................................... 70
PERFORMANCE TEST DIAGNOSES ................ 71
PERFORMANCE CHART ................................... 73
TROUBLE DIAGNOSES FOR UNUSUAL PRES-
SURE ................................................................... 74
Insufficient Heating ................................................. 77
INSPECTION FLOW ........................................... 77
Noise ...................................................................... 78
INSPECTION FLOW ........................................... 78
Intake Sensor Circuit .............................................. 80
COMPONENT DESCRIPTION ............................ 80
DIAGNOSTIC PROCEDURE FOR INTAKE SEN-
SOR .....................................................................80
COMPONENT INSPECTION ...............................81
CONTROL UNIT ........................................................82
Removal and Installation .........................................82
FRONT AIR CONTROL .......................................82
INTAKE SENSOR ......................................................83
Removal and Installation .........................................83
REMOVAL ............................................................83
INSTALLATION ....................................................83
BLOWER MOTOR .....................................................84
Components ............................................................84
Removal and Installation .........................................84
REMOVAL ............................................................84
INSTALLATION ....................................................84
IN-CABIN MICROFILTER ..........................................85
Removal and Installation .........................................85
FUNCTION ..........................................................85
REPLACEMENT TIMING ....................................85
REPLACEMENT PROCEDURE ..........................85
HEATER & COOLING UNIT ASSEMBLY .................87
Components ............................................................87
Removal and Installation .........................................87
REMOVAL ............................................................87
INSTALLATION ....................................................88
HEATER CORE .........................................................89
Components ............................................................89
Removal and Installation .........................................89
REMOVAL ............................................................89
INSTALLATION ....................................................89
INTAKE DOOR MOTOR ............................................90
Removal and Installation .........................................90
REMOVAL ............................................................90
INSTALLATION ....................................................90
MODE DOOR MOTOR ..............................................91
Removal and Installation .........................................91
REMOVAL ............................................................91
INSTALLATION ....................................................91
AIR MIX DOOR MOTOR ...........................................92
Components ............................................................92
Removal and Installation .........................................92
REMOVAL ............................................................92
INSTALLATION ....................................................92
FRONT BLOWER MOTOR RESISTOR ....................93
Removal and Installation .........................................93
REMOVAL ............................................................93
INSTALLATION ....................................................93
DUCTS AND GRILLES .............................................94
Components ............................................................94
Removal and Installation .........................................95
CONSOLE DUCTS AND CONSOLE GRILLE .....95
DEFROSTER NOZZLE ........................................96
RH AND LH SIDE DEMISTER DUCTS ...............96
RH AND LH VENTILATOR DUCTS .....................96
CENTER VENTILATOR DUCT ............................96
FLOOR CONNECTOR DUCT .............................96
FRONT AND REAR FLOOR DUCTS ..................96
GRILLES ..............................................................97
REFRIGERANT LINES .............................................98
HFC-134a (R-134a) Service Procedure ..................98
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SETTING OF SERVICE TOOLS AND EQUIP-
MENT .................................................................. 98
Components ......................................................... 100
Removal and Installation for Compressor ............ 101
COMPONENTS ................................................ 101
REMOVAL ......................................................... 101
INSTALLATION ................................................. 101
Removal and Installation for Compressor Clutch . 102
REMOVAL ......................................................... 102
INSPECTION .................................................... 103
INSTALLATION ................................................. 103
BREAK-IN OPERATION ................................... 105
Removal and Installation for High-pressure Flexible
A/C Hose .............................................................. 105
REMOVAL ......................................................... 105
INSTALLATION ................................................. 105
Removal and Installation for High-pressure A/C
Pipe ...................................................................... 105
REMOVAL ......................................................... 105
INSTALLATION ................................................. 105
Removal and Installation for Low-pressure Flexible
A/C Hose .............................................................. 105
REMOVAL ......................................................... 105
INSTALLATION ................................................. 105
Removal and Installation for Low-pressure A/C Pipe . 106
REMOVAL ......................................................... 106
INSTALLATION ................................................. 106
Removal and Installation for Refrigerant Pressure
Sensor .................................................................. 106
REMOVAL ......................................................... 106
INSTALLATION ................................................. 106
Removal and Installation for Condenser .............. 106
REMOVAL ......................................................... 106
INSTALLATION ................................................. 107
Removal and Installation for Evaporator .............. 108
REMOVAL ......................................................... 109
INSTALLATION ................................................. 109
Removal and Installation for Expansion Valve ...... 109
REMOVAL ......................................................... 109
INSTALLATION ................................................. 109
Checking for Refrigerant Leaks ............................ 109
Checking System for Leaks Using the Fluorescent
Dye Leak Detector ................................................ 109
Dye Injection ......................................................... 110
Electronic Refrigerant Leak Detector .................... 110
PRECAUTIONS FOR HANDLING LEAK
DETECTOR ....................................................... 110
CHECKING PROCEDURE ................................111
SERVICE DATA AND SPECIFICATIONS (SDS) .... 113
Service Data and Specifications (SDS) ................ 113
COMPRESSOR ................................................ 113
OIL ..................................................................... 113
REFRIGERANT ................................................. 113
ENGINE IDLING SPEED .................................. 113
BELT TENSION ................................................. 113
MTC-4
PRECAUTIONS
Revision: September 2005 2006 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
MTC-6
PRECAUTIONS
Revision: September 2005 2006 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
PRECAUTIONS
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O-RING AND REFRIGERANT CONNECTION
A/C Compressor and Condenser
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PRECAUTIONS
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Precautions for Servicing Compressor EJS004QY
●Plug all openings to prevent moisture and foreign matter from entering.
●When the compressor is removed, store it in the same position as it is when mounted on the car.
●When replacing or repairing compressor, follow “Maintenance of Oil Quantity in Compressor”
exactly. Refer to MTC-19, "Maintenance of Oil Quantity in Compressor" .
●Keep friction surfaces between clutch and pulley clean. If the surface is contaminated with oil,
wipe it off by using a clean waste cloth moistened with thinner.
●After compressor service operation, turn the compressor shaft by hand more than 5 turns in both
directions. This will equally distribute oil inside the compressor. After the compressor is installed,
let the engine idle and operate the compressor for 1 hour.
●After replacing the compressor magnet clutch, apply voltage to the new one and check for normal
operation. Refer to MTC-102, "Removal and Installation for Compressor Clutch" .
Precautions for Service Equipment EJS004QZ
RECOVERY/RECYCLING EQUIPMENT
Follow the manufacturer's instructions for machine operation and machine maintenance. Never introduce any
refrigerant other than that specified into the machine.
ELECTRONIC LEAK DETECTOR
Follow the manufacturer's instructions for tester operation and tester maintenance.
1. Plug 2. O-ring A. Torque wrench
B. Apply oil C. Do not apply oil to thread D. No good
E. Good
WJIA1994E
PRECAUTIONS
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SERVICE COUPLERS
Never attempt to connect HFC-134a (R-134a) service couplers to a
CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers will
not properly connect to the CFC-12 (R-12) system. If an improper
connection is attempted, discharging and contamination may occur.
REFRIGERANT WEIGHT SCALE
Verify that no refrigerant other than HFC134a (R-134a) and specified
oils have been used with the scale. If the scale controls refrigerant
flow electronically, the hose fitting must be 1/2”-16 ACME.
CHARGING CYLINDER
Using a charging cylinder is not recommended. Refrigerant may be vented into air from cylinder's top valve
when filling the cylinder with refrigerant. Also, the accuracy of the cylinder is generally less than that of an
electronic scale or of quality recycle/recharge equipment.
Shut-off valve rotation A/C service valve
Clockwise Open
Counterclockwise Close
RHA273D
RHA274D
Especificaciones del producto
| Marca: | Nissan |
| Categoría: | Auto's |
| Modelo: | Pathfinder (2006) |
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