Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Pathfinder 2004-2007 Approved Nissan Pathfinder 2007 MTC
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J AIR CONDITIONER
A
SECTION
MANUAL AIR CONDITIONER
MTC B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 4 . AIR CONDITIONER CONTROL .............................. 22 . F
Precautions for Supplemental Restraint System Description ............................................................. 22
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Operation ............................................................... 22
.
SIONER" ................................................................. 4. AIR MIX DOOR CONTROL ................................ 22 . G
Precautions for Working with HFC-134a (R-134a) 4 ..... BLOWER SPEED CONTROL ............................ 22 .
Contaminated Refrigerant ....................................... 4 . INTAKE DOORS CONTROL .............................. 22 .
General Refrigerant Precautions ............................. 5 . MODE DOOR CONTROL .................................. 22 .
H
Precautions for Leak Detection Dye ........................ 5 . DEFROSTER DOOR CONTROL ....................... 22 .
A/C Identification Label ........................................... 5 . MAGNET CLUTCH CONTROL .......................... 22 .
Precautions for Refrigerant Connection .................. 5 . Description of Control System ............................... 24 .
FEATURES OF NEW TYPE REFRIGERANT Control Operation .................................................. 25
. I
CONNECTION ..................................................... 6 . TEMPERATURE CONTROL DIAL (TEMPERA-
O-RING AND REFRIGERANT CONNECTION ..... 7 TURE CONTROL) .............................................. 25 .
Precautions for Servicing Compressor .................... 9 . RECIRCULATION () SWITCH ............................ 25 . MTC
Precautions for Service Equipment ......................... 9 . DEFROSTER () SWITCH ................................... 25 .
RECOVERY/RECYCLING EQUIPMENT ............. 9 . REAR WINDOW DEFOGGER SWITCH ............ 25 .
ELECTRONIC LEAK DETECTOR ....................... 9 . OFF SWITCH (BLOWER SPEED SET TO 0) .... 25 .
K
VACUUM PUMP ................................................ 10 . A/C SWITCH ...................................................... 25.
MANIFOLD GAUGE SET ................................... 10 . MODE DIAL ........................................................ 25
.
SERVICE HOSES .............................................. 10 . FRONT BLOWER CONTROL DIAL ................... 25 .
SERVICE COUPLERS ........................................11 . Discharge Air Flow ................................................ 26. L
REFRIGERANT WEIGHT SCALE ......................11 . FRONT ............................................................... 26
.
CHARGING CYLINDER ......................................11 . System Description ................................................ 27.
PREPARATION ........................................................ 12 . SWITCHES AND THEIR CONTROL FUNCTION 27 ... M
Special Service Tools ............................................ 12 . CAN Communication System Description ............. 28 .
HFC-134a (R-134a) Service Tools and Equipment 12 ... TROUBLE DIAGNOSIS ........................................... 29 .
Commercial Service Tools ..................................... 15 . CONSULT-II Function (BCM) ................................ 29 .
REFRIGERATION SYSTEM .................................... 16 . CONSULT-II START PROCEDURE ................... 29 .
Components .......................................................... 16 . DATA MONITOR ................................................ 29 .
REFRIGERATION SYSTEM .............................. 16 . How to Perform Trouble Diagnosis for Quick and
Refrigerant Cycle .................................................. 17 . Accurate Repair ..................................................... 29
.
REFRIGERANT FLOW ...................................... 17 . WORK FLOW ..................................................... 29 .
FREEZE PROTECTION .................................... 17 . SYMPTOM TABLE ............................................. 29 .
Refrigerant System Protection .............................. 17 . Component Parts and Harness Connector Location 31 ...
REFRIGERANT PRESSURE SENSOR ............ 17 . ENGINE COMPARTMENT ................................. 31 .
PRESSURE RELIEF VALVE .............................. 18 . PASSENGER COMPARTMENT ........................ 32 .
OIL ........................................................................... 19
. Schematic .............................................................. 33
.
Maintenance of Oil Quantity in Compressor ......... 19 . Wiring Diagram -- A/C,M -- .................................. 34 .
OIL ..................................................................... 19
. Front Air Control Terminals and Reference Values 38 ...
CHECKING AND ADJUSTING .......................... 19 . FRONT AIR CONTROL HARNESS CONNEC-
Revision: September 2006 MTC-1 2007 Pathfinder
TOR TERMINAL LAYOUT .................................. 38 . SOR ....................................................................81
.
TERMINALS AND REFERENCE VALUES FOR COMPONENT INSPECTION ..............................82 .
FRONT AIR CONTROL ...................................... 38 . CONTROL UNIT .......................................................83 .
Operational Check ................................................. 39 . Removal and Installation ........................................83 .
CHECKING BLOWER ........................................ 39 . FRONT AIR CONTROL ......................................83 .
CHECKING DISCHARGE AIR ........................... 39 . INTAKE SENSOR .....................................................84 .
CHECKING RECIRCULATION ........................... 39 . Removal and Installation ........................................84 .
CHECKING TEMPERATURE DECREASE ........ 39 . REMOVAL ...........................................................84.
CHECKING TEMPERATURE INCREASE ......... 39 . INSTALLATION ...................................................84 .
CHECK A/C SWITCH ......................................... 39 . BLOWER MOTOR ....................................................85 .
Power Supply and Ground Circuit for Front Air Con- Components ...........................................................85
.
trol .......................................................................... 40
. Removal and Installation ........................................85 .
INSPECTION FLOW .......................................... 40 . REMOVAL ...........................................................85.
COMPONENT DESCRIPTION ........................... 41 . INSTALLATION ...................................................85 .
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 41 ... IN-CABIN MICROFILTER .........................................86 .
Mode Door Motor Circuit ....................................... 43 . Removal and Installation ........................................86 .
INSPECTION FLOW .......................................... 43 . FUNCTION .........................................................86 .
SYSTEM DESCRIPTION ................................... 44 . REPLACEMENT TIMING ...................................86 .
COMPONENT DESCRIPTION ........................... 44 . REPLACEMENT PROCEDURE .........................86 .
DIAGNOSTIC PROCEDURE FOR MODE HEATER & COOLING UNIT ASSEMBLY ................88 .
DOOR MOTOR .................................................. 45 . Components ...........................................................88
.
Air Mix Door Motor Circuit ..................................... 47 . Removal and Installation ........................................88 .
INSPECTION FLOW .......................................... 47 . REMOVAL ...........................................................88.
SYSTEM DESCRIPTION ................................... 49 . INSTALLATION ...................................................89 .
COMPONENT DESCRIPTION ........................... 49 . HEATER CORE ........................................................90 .
DIAGNOSTIC PROCEDURE FOR AIR MIX Components ...........................................................90
.
DOOR MOTOR (FRONT) ................................... 50 . Removal and Installation ........................................90 .
Intake Door Motor Circuit ....................................... 52 . REMOVAL ...........................................................90.
INSPECTION FLOW .......................................... 52 . INSTALLATION ...................................................90 .
SYSTEM DESCRIPTION ................................... 53 . INTAKE DOOR MOTOR ...........................................91 .
COMPONENT DESCRIPTION ........................... 53 . Removal and Installation ........................................91 .
DIAGNOSTIC PROCEDURE FOR INTAKE REMOVAL ...........................................................91.
DOOR MOTOR .................................................. 54 . INSTALLATION ...................................................91 .
Front Blower Motor Circuit ..................................... 56 . MODE DOOR MOTOR .............................................92 .
INSPECTION FLOW .......................................... 56 . Removal and Installation ........................................92 .
SYSTEM DESCRIPTION ................................... 57 . REMOVAL ...........................................................92.
COMPONENT DESCRIPTION ........................... 57 . INSTALLATION ...................................................92 .
DIAGNOSTIC PROCEDURE FOR BLOWER AIR MIX DOOR MOTOR ..........................................93 .
MOTOR .............................................................. 58 . Components ...........................................................93
.
COMPONENT INSPECTION ............................. 62 . Removal and Installation ........................................93 .
Magnet Clutch Circuit ............................................ 64 . REMOVAL ...........................................................93.
INSPECTION FLOW .......................................... 64 . INSTALLATION ...................................................93 .
SYSTEM DESCRIPTION ................................... 65 . FRONT BLOWER MOTOR RESISTOR ...................94 .
DIAGNOSTIC PROCEDURE FOR MAGNET Removal and Installation ........................................94 .
CLUTCH ............................................................. 65 . REMOVAL ...........................................................94.
Insufficient Cooling ................................................ 69 . INSTALLATION ...................................................94 .
INSPECTION FLOW .......................................... 69 . DUCTS AND GRILLES ............................................95 .
PERFORMANCE TEST DIAGNOSES ............... 71 . Components ...........................................................95
.
PERFORMANCE CHART .................................. 73 . Removal and Installation ........................................96 .
TROUBLE DIAGNOSES FOR UNUSUAL PRES- CONSOLE DUCTS AND CONSOLE GRILLE ....96 .
SURE .................................................................. 74. DEFROSTER NOZZLE .......................................97 .
Insufficient Heating ................................................ 77 . RH AND LH SIDE DEMISTER DUCTS ..............97 .
INSPECTION FLOW .......................................... 77 . RH AND LH VENTILATOR DUCTS ....................97 .
Noise ..................................................................... 79
. CENTER VENTILATOR DUCT ...........................97 .
INSPECTION FLOW .......................................... 79 . FLOOR CONNECTOR DUCT ............................97 .
Intake Sensor Circuit ............................................. 81 . FRONT AND REAR FLOOR DUCTS .................97 .
COMPONENT DESCRIPTION ........................... 81 . GRILLES .............................................................98
.
DIAGNOSTIC PROCEDURE FOR INTAKE SEN- REFRIGERANT LINES ............................................99 .
HFC-134a (R-134a) Service Procedure .................99 .
Revision: September 2006 MTC-2 2007 Pathfinder
SETTING OF SERVICE TOOLS AND EQUIP- Sensor ................................................................. 107
.
MENT ................................................................. 99
. REMOVAL ........................................................ 107 . A
Components ........................................................ 101 . INSTALLATION ................................................ 107 .
Removal and Installation for Compressor ........... 102 . Removal and Installation for Condenser ............. 107 .
COMPONENTS ............................................... 102 . REMOVAL ........................................................ 107 . B
REMOVAL ........................................................ 102 . INSTALLATION ................................................ 108 .
INSTALLATION ................................................ 102 . Removal and Installation for Evaporator ............. 109 .
Removal and Installation for Compressor Clutch . 103 REMOVAL ........................................................ 110 .
REMOVAL ........................................................ 103 . INSTALLATION ................................................ 110 . C
INSPECTION ................................................... 104 . Removal and Installation for Expansion Valve ..... 110 .
INSTALLATION ................................................ 104 . REMOVAL ........................................................ 110 .
BREAK-IN OPERATION .................................. 106 . INSTALLATION ................................................ 110 . D
Removal and Installation for High-pressure Flexible Checking for Refrigerant Leaks ........................... 110 .
A/C Hose ............................................................. 106
. Checking System for Leaks Using the Fluorescent
REMOVAL ........................................................ 106 . Dye Leak Detector ............................................... 110 . E
INSTALLATION ................................................ 106 . Dye Injection .........................................................111
.
Removal and Installation for High-pressure A/C Electronic Refrigerant Leak Detector ....................111 .
Pipe ..................................................................... 106
. PRECAUTIONS FOR HANDLING LEAK
REMOVAL ........................................................ 106 . DETECTOR .......................................................111 . F
INSTALLATION ................................................ 106 . CHECKING PROCEDURE .............................. 112 .
Removal and Installation for Low-pressure Flexible SERVICE DATA AND SPECIFICATIONS (SDS) ... 114 .
A/C Hose ............................................................. 106
. Service Data and Specifications (SDS) ............... 114 . G
REMOVAL ........................................................ 106 . COMPRESSOR ............................................... 114 .
INSTALLATION ................................................ 106 . OIL .................................................................... 114
.
Removal and Installation for Low-pressure A/C Pipe 107 . REFRIGERANT ................................................ 114 . H
REMOVAL ........................................................ 107 . ENGINE IDLING SPEED ................................. 114 .
INSTALLATION ................................................ 107 . BELT TENSION ................................................ 114 .
Removal and Installation for Refrigerant Pressure
I
MTC
K
L
M
Revision: September 2006 MTC-3 2007 Pathfinder
PRECAUTIONS
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:
G 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.
G 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.
G 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:
G 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.
G 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.
G The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following
handling precautions must be observed:
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