Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Maxima 2000-2005 Approved Nissan Maxima 2004 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 ........................................... 6
. 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 .................................................. 24
.
Precautions for Servicing Compressor .................... 9 . DISPLAY SCREEN ............................................. 25 . ATC
Precautions for Service Equipment ......................... 9 . AUTO SWITCH .................................................. 25.
RECOVERY/RECYCLING EQUIPMENT ............. 9 . TEMPERATURE SWITCH (TEMPERATURE
ELECTRONIC LEAK DETECTOR ....................... 9 . CONTROL) (DRIVER SIDE) .............................. 25 .
K
VACUUM PUMP ................................................ 10 . TEMPERATURE SWITCH (TEMPERATURE
MANIFOLD GAUGE SET ................................... 10 . CONTROL) (PASSENGER SIDE) ...................... 25 .
SERVICE HOSES .............................................. 10 . RECIRCULATION (REC) SWITCH .................... 25 .
SERVICE COUPLERS ........................................11 . FRESH (FRE) SWITCH ..................................... 25 . L
CHARGING CYLINDER ......................................11 . DEFROSTER (DEF) SWITCH ............................ 25 .
Wiring Diagrams and Trouble Diagnosis ................11 . REAR WINDOW DEFOGGER SWITCH ............ 25 .
PREPARATION ........................................................ 12
. OFF SWITCH ..................................................... 25
. M
Special Service Tools ............................................ 12
. A/C SWITCH ...................................................... 25
.
HFC-134a (R-134a) Service Tools and Equipment 12 ... MODE SWITCH ................................................. 25 .
Commercial Service Tools ..................................... 15 . FAN CONTROL SWITCH ................................... 25 .
REFRIGERATION SYSTEM .................................... 16 . DUAL SWITCH (WITH LEFT AND RIGHT VEN-
Refrigerant Cycle .................................................. 16
. TILATION TEMPERATURE SEPARATE CON-
REFRIGERANT FLOW ...................................... 16 . TROL SYSTEM) ................................................. 25.
Refrigerant System Protection .............................. 16 . Fail-safe Function .................................................. 26
.
REFRIGERANT PRESSURE SENSOR ............ 16 . Discharge Air Flow ................................................ 27
.
PRESSURE RELIEF VALVE ............................. 16 . System Description ................................................ 28
.
Component Layout ................................................ 17. SWITCHES AND THEIR CONTROL FUNCTION 28 ...
LUBRICANT ............................................................ 18
. CAN Communication System Description ............. 29 .
Maintenance of Lubricant Quantity in Compressor 18 ... TROUBLE DIAGNOSIS ........................................... 30 .
LUBRICANT ....................................................... 18
. CONSULT-II ........................................................... 30
.
CHECKING AND ADJUSTING .......................... 18 . CONSULT-II BASIC OPERATION ...................... 30 .
AIR CONDITIONER CONTROL .............................. 21 . DATA MONITOR ................................................ 31 .
Description of Air Conditioner LAN Control System 21 ... How to Perform Trouble Diagnosis for Quick and
ATC-1
Accurate Repair ..................................................... 32
. Blower Motor Circuit ...............................................67 .
WORK FLOW ..................................................... 32 . INSPECTION FLOW ...........................................67 .
SYMPTOM TABLE ............................................. 32 . SYSTEM DESCRIPTION ....................................68 .
Component Parts and Harness Connector Location 33 ... COMPONENT DESCRIPTION ...........................69 .
ENGINE COMPARTMENT ................................. 33 . DIAGNOSTIC PROCEDURE FOR BLOWER
PASSENGER COMPARTMENT ......................... 34 . MOTOR ...............................................................69.
Schematic .............................................................. 35
. COMPONENT INSPECTION ..............................71 .
Wiring Diagram --A/C-- ........................................ 36 . Magnet Clutch Circuit .............................................72 .
Auto Amp. Terminals and Reference Value ........... 40 . INSPECTION FLOW ...........................................72 .
PIN CONNECTOR TERMINAL LAYOUT ........... 40 . SYSTEM DESCRIPTION ....................................73 .
TERMINALS AND REFERENCE VALUE FOR DIAGNOSTIC PROCEDURE FOR MAGNET
UNIFIED METER AND A/C AMP. ...................... 40 . CLUTCH .............................................................73 .
A/C System Self-diagnosis Function ..................... 42 . COMPONENT INSPECTION ..............................77 .
DESCRIPTION ................................................... 42 . Insufficient Cooling .................................................78 .
FUNCTION CONFIRMATION PROCEDURE ..... 43 . INSPECTION FLOW ...........................................78 .
AUXILIARY MECHANISM: TEMPERATURE PERFORMANCE TEST DIAGNOSES ...............79 .
SETTING TRIMMER .......................................... 48 . PERFORMANCE CHART ...................................81 .
AUXILIARY MECHANISM: FOOT POSITION TROUBLE DIAGNOSES FOR UNUSUAL PRES-
SETTING TRIMMER .......................................... 49 . SURE ..................................................................82
.
AUXILIARY MECHANISM: INLET PORT MEM- Insufficient Heating ................................................85 .
ORY FUNCTION ................................................ 49 . INSPECTION FLOW ...........................................85 .
Operational Check ................................................. 50 . Noise ......................................................................86
.
CHECKING MEMORY FUNCTION .................... 50 . INSPECTION FLOW ...........................................86 .
CHECKING BLOWER ........................................ 50 . Self-diagnosis ........................................................87.
CHECKING DISCHARGE AIR ........................... 50 . INSPECTION FLOW ...........................................87 .
CHECKING RECIRCULATION ........................... 51 . Memory Function ...................................................88 .
CHECKING TEMPERATURE DECREASE ........ 51 . INSPECTION FLOW ...........................................88 .
CHECKING TEMPERATURE INCREASE ......... 51 . Ambient Sensor Circuit ..........................................89 .
CHECK A/C SWITCH ......................................... 51 . COMPONENT DESCRIPTION ...........................89 .
CHECKING AUTO MODE .................................. 52 . AMBIENT TEMPERATURE INPUT PROCESS ...89
Power Supply and Ground Circuit for Auto Amp. ... 52 DIAGNOSTIC PROCEDURE FOR AMBIENT
INSPECTION FLOW .......................................... 52 . SENSOR .............................................................89 .
COMPONENT DESCRIPTION ........................... 53 . COMPONENT INSPECTION ..............................91 .
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 53 ... In-vehicle Sensor Circuit ........................................92 .
LAN System Circuit ............................................... 55 . COMPONENT DESCRIPTION ...........................92 .
DIAGNOSTIC PROCEDURE FOR LAN CIR- DIAGNOSTIC PROCEDURE FOR IN-VEHICLE
CUIT ................................................................... 55
. SENSOR .............................................................93 .
Mode Door Motor Circuit ....................................... 58 . COMPONENT INSPECTION ..............................94 .
INSPECTION FLOW .......................................... 58 . Sunload Sensor Circuit ..........................................95 .
SYSTEM DESCRIPTION ................................... 59 . COMPONENT DESCRIPTION ...........................95 .
COMPONENT DESCRIPTION ........................... 60 . SUNLOAD INPUT PROCESS ............................95 .
DIAGNOSTIC PROCEDURE FOR MODE DIAGNOSTIC PROCEDURE FOR SUNLOAD
DOOR MOTOR .................................................. 60 . SENSOR .............................................................95 .
Air Mix Door Motor Circuit ..................................... 61 . COMPONENT INSPECTION ..............................97 .
INSPECTION FLOW .......................................... 61 . Intake Sensor Circuit ..............................................98 .
SYSTEM DESCRIPTION ................................... 62 . COMPONENT DESCRIPTION ...........................98 .
COMPONENT DESCRIPTION ........................... 63 . DIAGNOSTIC PROCEDURE FOR INTAKE SEN-
DIAGNOSTIC PROCEDURE FOR AIR MIX SOR ....................................................................98
.
DOOR ................................................................. 63
. COMPONENT INSPECTION ..............................99 .
Air Mix Door Motor PBR Circuit ............................. 63 . AUTO AMP ............................................................. 100.
DIAGNOSTIC PROCEDURE FOR AIR MIX Removal and Installation ...................................... 100 .
DOOR PBR ........................................................ 63 . REMOVAL ......................................................... 100 .
Intake Door Motor Circuit ....................................... 64 . INSTALLATION ................................................. 100 .
INSPECTION FLOW .......................................... 64 . AMBIENT SENSOR ............................................... 101 .
SYSTEM DESCRIPTION ................................... 65 . Removal and Installation ...................................... 101 .
COMPONENT DESCRIPTION ........................... 66 . REMOVAL ......................................................... 101 .
DIAGNOSTIC PROCEDURE FOR INTAKE INSTALLATION ................................................. 101 .
DOOR MOTOR .................................................. 66 .
ATC-2
IN-VEHICLE SENSOR ........................................... 102 . DUCTS AND GRILLES .......................................... 114 .
Removal and Installation ..................................... 102
. Removal and Installation ..................................... 114 . A
REMOVAL ........................................................ 102
. REMOVAL ........................................................ 114 .
INSTALLATION ................................................ 102
. INSTALLATION ................................................ 115 .
SUNLOAD SENSOR ............................................. 103 . REFRIGERANT LINES .......................................... 116 . B
Removal and Installation ..................................... 103
. HFC-134a (R-134a) Service Procedure .............. 116 .
REMOVAL ........................................................ 103
. SETTING OF SERVICE TOOLS AND EQUIP-
INSTALLATION ................................................ 103
. MENT ............................................................... 116
.
INTAKE SENSOR .................................................. 104
. Components ........................................................ 118 . C
Removal and Installation ..................................... 104
. Removal and Installation for Compressor ........... 119 .
REMOVAL ........................................................ 104
. REMOVAL ........................................................ 119 .
INSTALLATION ................................................ 104
. INSTALLATION ................................................ 119 . D
BLOWER UNIT ...................................................... 105
. Removal and Installation for Compressor Clutch . 120
Removal and Installation ..................................... 105
. REMOVAL ........................................................ 120 .
REMOVAL ........................................................ 105
. INSPECTION ................................................... 121 . E
INSTALLATION ................................................ 105
. INSTALLATION ................................................ 121 .
BLOWER MOTOR ................................................. 106 . BREAK-IN OPERATION ................................... 122 .
Removal and Installation ..................................... 106
. Removal and Installation for Low-pressure Flexible
REMOVAL ........................................................ 106
. Hose .................................................................... 122
. F
INSTALLATION ................................................ 106
. REMOVAL ........................................................ 122 .
INTAKE DOOR MOTOR ........................................ 107 . INSTALLATION ................................................ 122 .
Removal and Installation ..................................... 107
. Removal and Installation for High-pressure Flexible G
REMOVAL ........................................................ 107
. Hose .................................................................... 123
.
INSTALLATION ................................................ 107
. REMOVAL ........................................................ 123 .
IN-CABIN MICROFILTER ...................................... 108 . INSTALLATION ................................................ 123 . H
Removal and Installation ..................................... 108
. Removal and Installation for High-pressure Pipe . 123
FUNCTION ....................................................... 108
. REMOVAL ........................................................ 123 .
REPLACEMENT TIMING ................................. 108 . INSTALLATION ................................................ 123 .
I
REPLACEMENT PROCEDURES .................... 108 . Removal and Installation for Refrigerant Pressure
HEATER & COOLING UNIT ASSEMBLY ............. 109 . Sensor ................................................................. 123
.
Removal and Installation ..................................... 109
. Removal and Installation for Condenser ............. 123 .
REMOVAL ........................................................ 109
. REMOVAL ........................................................ 123 . ATC
INSTALLATION ................................................ 109
. INSTALLATION ................................................ 124 .
HEATER CORE ......................................................110
. Removal and Installation for Evaporator ............. 124 .
Removal and Installation ......................................110
. REMOVAL ........................................................ 124 . K
REMOVAL .........................................................110
. INSTALLATION ................................................ 125 .
INSTALLATION .................................................110
. Removal and Installation for Expansion Valve ..... 125 .
MODE DOOR MOTOR ........................................... 111 . Checking for Refrigerant Leaks ........................... 126 . L
Removal and Installation ...................................... 111
. Checking System for Leaks Using the Fluorescent
REMOVAL ......................................................... 111
. Leak Detector ...................................................... 126.
INSTALLATION ................................................. 111
. Dye Injection ........................................................ 126
.
AIR MIX DOOR MOTOR .........................................112 . Electronic Refrigerant Leak Detector ................... 127 . M
Removal and Installation ......................................112
. PRECAUTIONS FOR HANDLING LEAK
REMOVAL .........................................................112
. DETECTOR ...................................................... 127 .
INSTALLATION .................................................112
. CHECKING PROCEDURE .............................. 127 .
FAN CONTROL AMPLIFIER ..................................113 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 130 .
Removal and Installation ......................................113
. Service Data and Specifications (SDS) ............... 130 .
REMOVAL .........................................................113
. COMPRESSOR ............................................... 130 .
INSTALLATION .................................................113
. LUBRICANT ..................................................... 130 .
REFRIGERANT ................................................ 130 .
ENGINE IDLING SPEED ................................. 130 .
BELT TENSION ................................................ 130 .
ATC-3
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS001MM
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:
q 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.
q 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.
q 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) EJS001H7
WARNING:
q 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
Recovery/Recycling Recharging equipment (ACR2000) (J-43600) and Refrigerant Identifier.
q Use only specified lubricant for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) compo-
nents. If lubricant other than that specified is used, compressor failure is likely to occur.
q The specified HFC-134a (R-134a) lubricant rapidly absorbs moisture from the atmosphere. The fol-
lowing handling precautions must be observed:
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