Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Maxima 2006-2009 Approved Nissan Maxima 2007 ATC
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J AIR CONDITIONER
A
B
SECTION
AUTOMATIC AIR CONDITIONER C
D
E
CONTENTS
PRECAUTIONS ......................................................... 4 . System Construction ............................................. 21 . F
Precautions for Supplemental Restraint System OPERATION ....................................................... 21 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- TRANSMISSION DATA AND TRANSMISSION
SIONER" ................................................................. 4. ORDER .............................................................. 22 . G
Precautions for Working with HFC-134a (R-134a) 4 ..... AIR MIX DOOR CONTROL (AUTOMATIC TEM-
Contaminated Refrigerant ....................................... 4 . PERATURE CONTROL) .................................... 23 .
General Refrigerant Precautions ............................. 5 . FAN SPEED CONTROL ..................................... 23 .
H
Precautions for Leak Detection Dye ........................ 5 . INTAKE DOOR CONTROL ................................ 23 .
A/C Identification Label ........................................... 5 . OUTLET DOOR CONTROL ............................... 23 .
Precautions for Refrigerant Connection .................. 6 . MAGNET CLUTCH CONTROL .......................... 23 .
FEATURES OF NEW TYPE REFRIGERANT SELF-DIAGNOSTIC SYSTEM ........................... 23 . I
CONNECTION ..................................................... 6 . Description of Control System ............................... 24 .
O-RING AND REFRIGERANT CONNECTION..... 7 Control Operation .................................................. 25 .
Precautions for Servicing Compressor .................... 9 . DISPLAY SCREEN ............................................. 25 . ATC
Precautions for Service Equipment ......................... 9 . AUTO SWITCH .................................................. 25 .
RECOVERY/RECYCLING EQUIPMENT ............. 9 . TEMPERATURE CONTROL DIAL (DRIVER
ELECTRONIC LEAK DETECTOR ....................... 9 . SIDE) .................................................................. 25
.
K
VACUUM PUMP ................................................ 10 . TEMPERATURE CONTROL DIAL (PASSEN-
MANIFOLD GAUGE SET ................................... 10 . GER SIDE) ......................................................... 25 .
SERVICE HOSES .............................................. 10 . RECIRCULATION () SWITCH ............................ 25 .
SERVICE COUPLERS ........................................11 . DEFROSTER (DEF) SWITCH ............................ 25 . L
REFRIGERANT WEIGHT SCALE ......................11 . REAR WINDOW DEFOGGER SWITCH ............ 25 .
CHARGING CYLINDER ......................................11 . OFF SWITCH ..................................................... 25 .
PREPARATION ........................................................ 12 . A/C SWITCH ...................................................... 25 . M
Special Service Tools ............................................ 12 . MODE SWITCH ................................................. 25 .
HFC-134a (R-134a) Service Tools and Equipment 12 ... BLOWER CONTROL SWITCH .......................... 26 .
Commercial Service Tools ..................................... 14 . DUAL SWITCH (WITH LEFT AND RIGHT VEN-
REFRIGERATION SYSTEM .................................... 16 . TILATION TEMPERATURE SEPARATE CON-
Refrigerant Cycle .................................................. 16 . TROL SYSTEM) ................................................. 26 .
REFRIGERANT FLOW ...................................... 16 . Fail-safe Function .................................................. 26 .
Refrigerant System Protection .............................. 16 . Discharge Air Flow ................................................ 27 .
REFRIGERANT PRESSURE SENSOR ............ 16 . ........................................................................... 27
.
PRESSURE RELIEF VALVE ............................. 16 . System Description ................................................ 28 .
Component Layout ................................................ 17 . SWITCHES AND THEIR CONTROL FUNCTION 28 ...
OIL ........................................................................... 18
. CAN Communication System Description ............. 29 .
Maintenance of Oil Quantity in Compressor ......... 18 . TROUBLE DIAGNOSIS ........................................... 30 .
OIL ..................................................................... 18
. CONSULT-II Function (BCM) ................................ 30 .
CHECKING AND ADJUSTING .......................... 18 . CONSULT-II START PROCEDURE ................... 30 .
AIR CONDITIONER CONTROL .............................. 21 . DATA MONITOR ................................................ 30 .
Description of Air Conditioner LAN Control System 21 ... How to Perform Trouble Diagnosis for Quick and
Revision: May 2006 ATC-1 2007 Maxima
Accurate Repair ..................................................... 31
. DIAGNOSTIC PROCEDURE FOR INTAKE
WORK FLOW ..................................................... 31 . DOOR MOTOR ...................................................68 .
SYMPTOM TABLE ............................................. 31 . Blower Motor Circuit ...............................................69 .
Component Parts and Harness Connector Location 33 ... INSPECTION FLOW ...........................................69 .
ENGINE COMPARTMENT ................................. 33 . SYSTEM DESCRIPTION ....................................71 .
PASSENGER COMPARTMENT ......................... 34 . COMPONENT DESCRIPTION ...........................72 .
Schematic .............................................................. 35
. DIAGNOSTIC PROCEDURE FOR BLOWER
Wiring Diagram -- A/C,A -- .................................. 36 . MOTOR ...............................................................72.
Unified Meter and A/C Amp. Terminals and Refer- COMPONENT INSPECTION ..............................75 .
ence Value ............................................................. 41
. Magnet Clutch Circuit .............................................76 .
A/C System Self-diagnosis Function ..................... 41 . INSPECTION FLOW ...........................................76 .
DESCRIPTION ................................................... 41 . SYSTEM DESCRIPTION ....................................78 .
FUNCTION CONFIRMATION PROCEDURE ..... 41 . DIAGNOSTIC PROCEDURE FOR MAGNET
AUXILIARY MECHANISM: TEMPERATURE CLUTCH .............................................................78 .
SETTING TRIMMER .......................................... 46 . Insufficient Cooling .................................................83 .
AUXILIARY MECHANISM: DEFROST/FOOT INSPECTION FLOW ...........................................83 .
POSITION SETTING TRIMMER ........................ 48 . PERFORMANCE TEST DIAGNOSES ...............85 .
AUXILIARY MECHANISM: INLET PORT MEM- PERFORMANCE CHART ...................................87 .
ORY FUNCTION ................................................ 48 . TROUBLE DIAGNOSES FOR UNUSUAL PRES-
Operational Check ................................................. 49 . SURE ..................................................................88
.
CHECKING MEMORY FUNCTION .................... 49 . Insufficient Heating ................................................91 .
CHECKING BLOWER ........................................ 49 . INSPECTION FLOW ...........................................91 .
CHECKING DISCHARGE AIR ........................... 49 . Noise ......................................................................93
.
CHECKING RECIRCULATION ........................... 49 . INSPECTION FLOW ...........................................93 .
CHECKING TEMPERATURE DECREASE ........ 49 . Self-diagnosis ........................................................94.
CHECKING TEMPERATURE INCREASE ......... 49 . INSPECTION FLOW ...........................................94 .
CHECKING TEMPERATURE DECREASE ........ 50 . Memory Function ...................................................96 .
CHECKING TEMPERATURE INCREASE ......... 50 . INSPECTION FLOW ...........................................96 .
CHECK A/C SWITCH ......................................... 50 . Ambient Sensor Circuit ..........................................97 .
CHECK NAVI DISPLAY OR A/C DISPLAY ......... 50 . COMPONENT DESCRIPTION ...........................97 .
CHECKING AUTO MODE .................................. 50 . AMBIENT TEMPERATURE INPUT PROCESS ...97
Power Supply and Ground Circuit for Front Air Con- DIAGNOSTIC PROCEDURE FOR AMBIENT
trol and Unified Meter and A/C Amp. ..................... 51 . SENSOR .............................................................97 .
INSPECTION FLOW .......................................... 51 . COMPONENT INSPECTION ..............................99 .
COMPONENT DESCRIPTION ........................... 52 . In-vehicle Sensor Circuit ...................................... 100 .
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 52 ... COMPONENT DESCRIPTION ......................... 100 .
LAN System Circuit ............................................... 55 . DIAGNOSTIC PROCEDURE FOR IN-VEHICLE
DIAGNOSTIC PROCEDURE FOR LAN CIR- SENSOR ........................................................... 101 .
CUIT ................................................................... 55
. COMPONENT INSPECTION ............................ 102 .
Mode Door Motor Circuit ....................................... 57 . Sunload Sensor Circuit ........................................ 103 .
INSPECTION FLOW .......................................... 57 . COMPONENT DESCRIPTION ......................... 103 .
SYSTEM DESCRIPTION ................................... 59 . SUNLOAD INPUT PROCESS .......................... 103 .
COMPONENT DESCRIPTION ........................... 60 . DIAGNOSTIC PROCEDURE FOR SUNLOAD
DIAGNOSTIC PROCEDURE FOR MODE SENSOR ........................................................... 103 .
DOOR MOTOR .................................................. 60 . COMPONENT INSPECTION ............................ 105 .
Air Mix Door Motor Circuit ..................................... 61 . Intake Sensor Circuit ............................................ 106 .
INSPECTION FLOW .......................................... 61 . COMPONENT DESCRIPTION ......................... 106 .
SYSTEM DESCRIPTION ................................... 63 . DIAGNOSTIC PROCEDURE FOR INTAKE SEN-
COMPONENT DESCRIPTION ........................... 64 . SOR .................................................................. 106
.
DIAGNOSTIC PROCEDURE FOR AIR MIX COMPONENT INSPECTION ............................ 107 .
DOOR MOTOR .................................................. 64 . Multiplex Communication Circuit .......................... 108 .
Air Mix Door Motor PBR Circuit ............................. 64 . DIAGNOSIS PROCEDURE FOR MULTIPLEX
DIAGNOSTIC PROCEDURE FOR AIR MIX COMMUNICATION ........................................... 108 .
DOOR MOTOR PBR CIRCUIT ........................... 64 . A/C Display (without NAVI) .................................. 110 .
Intake Door Motor Circuit ....................................... 65 . DIAGNOSIS PROCEDURE FOR A/C DISPLAY. 110
INSPECTION FLOW .......................................... 65 . Front Air Control Self - Diagnosis ........................ 112 .
SYSTEM DESCRIPTION ................................... 67 . DIAGNOSIS PROCEDURE FOR FRONT AIR
COMPONENT DESCRIPTION ........................... 68 . CONTROL ........................................................ 112 .
Revision: May 2006 ATC-2 2007 Maxima
UNIFIED METER AND A/C AMP. ...........................113 . DUCTS AND GRILLES .......................................... 127 .
Removal and Installation ......................................113
. Removal and Installation ..................................... 127 . A
REMOVAL .........................................................113
. CENTER VENTILATOR GRILLE ...................... 127 .
INSTALLATION .................................................113
. SIDE VENTILATOR GRILLE LH ...................... 127 .
AMBIENT SENSOR ................................................114 . SIDE VENTILATOR GRILLE RH ...................... 128 . B
Removal and Installation ......................................114
. FLOOR DUCT .................................................. 128 .
REMOVAL .........................................................114
. REFRIGERANT LINES .......................................... 130 .
INSTALLATION .................................................114
. HFC-134a (R-134a) Service Procedure .............. 130 .
IN-VEHICLE SENSOR ............................................115 . SETTING OF SERVICE TOOLS AND EQUIP- C
Removal and Installation ......................................115
. MENT ............................................................... 130
.
REMOVAL .........................................................115
. Components ........................................................ 132 .
INSTALLATION .................................................115
. Removal and Installation for Compressor ........... 133 . D
SUNLOAD SENSOR ..............................................116 . REMOVAL ........................................................ 133 .
Removal and Installation ......................................116
. INSTALLATION ................................................ 133 .
REMOVAL .........................................................116
. Removal and Installation for Compressor Clutch . 133 E
INSTALLATION .................................................116
. REMOVAL ........................................................ 133 .
INTAKE SENSOR ...................................................117
. INSPECTION AFTER REMOVAL .................... 134 .
Removal and Installation ......................................117
. INSTALLATION ................................................ 135 .
REMOVAL .........................................................117
. INSPECTION AFTER INSTALLATION ............. 136 . F
INSTALLATION .................................................117
. BREAK-IN OPERATION ................................... 136 .
BLOWER UNIT .......................................................118
. Removal and Installation for Low-pressure Flexible
Removal and Installation ......................................118
. Hose .................................................................... 136
. G
REMOVAL .........................................................118
. REMOVAL ........................................................ 136 .
INSTALLATION .................................................118
. INSTALLATION ................................................ 136 .
BLOWER MOTOR ..................................................119 . Removal and Installation for High-pressure Flexible H
Removal and Installation ......................................119
. Hose .................................................................... 136
.
REMOVAL .........................................................119
. REMOVAL ........................................................ 136 .
INSTALLATION .................................................119
. INSTALLATION ................................................ 137 .
I
INTAKE DOOR MOTOR ........................................ 120 . Removal and Installation for High-pressure Pipe . 137
Removal and Installation ..................................... 120
. REMOVAL ........................................................ 137 .
REMOVAL ........................................................ 120
. INSTALLATION ................................................ 137 .
INSTALLATION ................................................ 120
. Removal and Installation for Refrigerant Pressure ATC
IN-CABIN MICROFILTER ...................................... 121 . Sensor ................................................................. 137
.
Removal and Installation ..................................... 121
. REMOVAL ........................................................ 137 .
FUNCTION ....................................................... 121
. INSTALLATION ................................................ 137 . K
REPLACEMENT TIMING ................................. 121 . Removal and Installation for Condenser ............. 137 .
REPLACEMENT PROCEDURES .................... 121 . REMOVAL ........................................................ 137 .
HEATER & COOLING UNIT ASSEMBLY ............. 122 . INSTALLATION ................................................ 138 . L
Removal and Installation ..................................... 122
. Removal and Installation for Evaporator ............. 138 .
REMOVAL ........................................................ 122
. REMOVAL ........................................................ 138 .
INSTALLATION ................................................ 122
. INSTALLATION ................................................ 139 .
HEATER CORE ..................................................... 123
. Removal and Installation for Expansion Valve ..... 139 . M
Removal and Installation ..................................... 123
. REMOVAL ........................................................ 139 .
REMOVAL ........................................................ 123
. INSTALLATION ................................................ 140 .
INSTALLATION ................................................ 123
. Checking for Refrigerant Leaks ........................... 140 .
MODE DOOR MOTOR .......................................... 124 . Checking System for Leaks Using the Fluorescent
Removal and Installation ..................................... 124
. Leak Detector ...................................................... 140.
REMOVAL ........................................................ 124
. Dye Injection ........................................................ 141
.
INSTALLATION ................................................ 124
. Electronic Refrigerant Leak Detector ................... 141 .
AIR MIX DOOR MOTOR ........................................ 125 . PRECAUTIONS FOR HANDLING LEAK
Removal and Installation ..................................... 125
. DETECTOR ...................................................... 141 .
DRIVER SIDE AIR MIX DOOR MOTOR .......... 125 . CHECKING PROCEDURE .............................. 142 .
PASSENGER SIDE AIR MIX DOOR MOTOR . 125 SERVICE DATA AND SPECIFICATIONS (SDS) ... 144 .
FAN CONTROL AMPLIFIER ................................. 126 . Service Data and Specifications (SDS) ............... 144 .
Removal and Installation ..................................... 126
. COMPRESSOR ............................................... 144 .
REMOVAL ........................................................ 126
. LUBRICANT ..................................................... 144 .
INSTALLATION ................................................ 126
. REFRIGERANT ................................................ 144 .
ENGINE IDLING SPEED ................................. 144 .
BELT TENSION ................................................ 144 .
Revision: May 2006 ATC-3 2007 Maxima
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS002TV
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) EJS002TW
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 ATC-4, "Contaminated Refrigerant" . To
determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use refrigerant recov-
ery/recycling 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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