Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Altima 2000-2005 Approved Nissan Altima 2002 ATC
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J AIR CONDITIONER
A
SECTION
AUTOMATIC AIR CONDITIONER
ATC B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 4
. AIR CONDITIONER CONTROL .............................. 21 . F
Precautions for Supplemental Restraint System Overview Air Conditioner LAN Control System ..... 21 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- System Construction ............................................. 21
.
SIONER" ................................................................. 4
. OPERATION ...................................................... 21
. G
Precautions for Working with HFC-134a (R-134a) 4 ..... TRANSMISSION DATA AND TRANSMISSION
Contaminated Refrigerant ....................................... 4 . ORDER .............................................................. 22
.
General Refrigerant Precautions ............................. 5 . AIR MIX DOOR CONTROL (AUTOMATIC TEM-
H
Precautions for Leak Detection Dye ........................ 5 . PERATURE CONTROL) .................................... 22 .
A/C Identification Label ........................................... 5
. FAN SPEED CONTROL .................................... 23 .
Precautions for Refrigerant Connection .................. 6 . INTAKE DOOR CONTROL ................................ 23 .
FEATURES OF NEW TYPE REFRIGERANT OUTLET DOOR CONTROL ............................... 23 . I
CONNECTION ..................................................... 6. MAGNET CLUTCH CONTROL .......................... 23 .
O-RING AND REFRIGERANT CONNECTION ..... 7 SELF-DIAGNOSTIC SYSTEM ........................... 23 .
Precautions for Servicing Compressor .................... 9 . Overview of Control system ................................... 23 . ATC
Precautions for Service Equipment ......................... 9 . Control Operation .................................................. 24
.
RECOVERY/RECYCLING EQUIPMENT ............. 9 . DISPLAY SCREEN ............................................ 24 .
ELECTRONIC LEAK DETECTOR ....................... 9 . AUTO SWITCH .................................................. 24.
K
VACUUM PUMP ................................................ 10 . ECON (ECONOMY) SWITCH ............................ 24 .
MANIFOLD GAUGE SET ................................... 10 . TEMPERATURE DIAL (POTENTIO TEMPERA-
SERVICE HOSES .............................................. 10 . TURE CONTROL) .............................................. 24 .
SERVICE COUPLERS ........................................11 . OFF SWITCH ..................................................... 24
. L
REFRIGERANT WEIGHT SCALE ......................11 . FAN SWITCH ..................................................... 24
.
CALIBRATING ACR4 WEIGHT SCALE ..............11 . RECIRCULATION (REC) SWITCH .................... 24 .
CHARGING CYLINDER ......................................11 . DEFROSTER (DEF) SWITCH ............................ 24 . M
Wiring Diagrams and Trouble Diagnosis ................11 . MODE SWITCH ................................................. 24 .
PREPARATION ........................................................ 12
. REAR WINDOW DEFOGGER SWITCH ............ 24 .
Special Service Tools ............................................ 12
. Discharge Air Flow ................................................ 25
.
HFC-134a (R-134a) Service Tools and Equipment 12 ... System Description ................................................ 26
.
Commercial Service Tools ..................................... 15 . SWITCHES AND THEIR CONTROL FUNCTION 26 ...
REFRIGERATION SYSTEM .................................... 16 . CAN Communication System Description ............. 26 .
Refrigerant Cycle .................................................. 16
. FOR TCS MODELS ........................................... 27 .
REFRIGERANT FLOW ...................................... 16 . FOR A/T MODELS ............................................. 28 .
Refrigerant System Protection .............................. 16 . FOR M/T MODELS ............................................ 29 .
REFRIGERANT PRESSURE SENSOR ............ 16 . TROUBLE DIAGNOSIS ........................................... 31 .
PRESSURE RELIEF VALVE ............................. 16 . How to Perform Trouble Diagnoses for Quick and
Component Layout ................................................ 17. Accurate Repair ..................................................... 31
.
LUBRICANT ............................................................ 18
. WORK FLOW ..................................................... 31
.
Maintenance of Lubricant Quantity in Compressor 18 ... SYMPTOM TABLE ............................................. 31 .
LUBRICANT ....................................................... 18
. Component Parts and Harness Connector Location 32 ...
CHECKING AND ADJUSTING .......................... 18 . ENGINE COMPARTMENT ................................. 32 .
ATC-1
PASSENGER COMPARTMENT ........................ 33 . INSPECTION FLOW ...........................................88 .
Circuit Diagram ...................................................... 34
. Self-diagnosis ........................................................89
.
Wiring Diagram -- A/C,A -- .................................. 35 . INSPECTION FLOW ...........................................89 .
Auto Amp. Terminals and Reference Value ........... 39 . Memory Function ...................................................90
.
INSPECTION OF AUTO AMP. ........................... 39 . INSPECTION FLOW ...........................................90 .
A/C AUTO AMP. HARNESS CONNECTOR TER- ECON (ECONOMY) Mode .....................................91 .
MINAL LAYOUT ................................................. 39 . INSPECTION FLOW ...........................................91 .
AUTO AMP. INSPECTION TABLE ..................... 39 . Ambient Sensor Circuit ..........................................91 .
Self-diagnosis ........................................................ 41
. COMPONENT DESCRIPTION ...........................91 .
DESCRIPTION ................................................... 41 . AMBIENT TEMPERATURE INPUT PROCESS ...91
FUNCTION CONFIRMATION PROCEDURE ..... 42 . DIAGNOSTIC PROCEDURE ..............................92 .
AUXILIARY MECHANISM: TEMPERATURE COMPONENT INSPECTION ..............................93 .
SETTING TRIMMER .......................................... 48 . In-vehicle Sensor Circuit ........................................93.
Operational Check ................................................. 49 . COMPONENT DESCRIPTION ...........................93 .
CONDITIONS: .................................................... 49 . DIAGNOSTIC PROCEDURE ..............................94 .
PROCEDURE: .................................................... 49 . COMPONENT INSPECTION ..............................96 .
Power Supply and Ground Circuit for Auto Amp. ... 52 Sunload Sensor Circuit ..........................................96 .
COMPONENT DESCRIPTION ........................... 52 . COMPONENT DESCRIPTION ...........................96 .
DIAGNOSTIC PROCEDURE ............................. 53 . SUNLOAD INPUT PROCESS ............................96 .
LAN System Circuit ............................................... 55 . DIAGNOSTIC PROCEDURE ..............................97 .
DIAGNOSTIC PROCEDURE ............................. 55 . COMPONENT INSPECTION ..............................98 .
Mode Door Motor Circuit ....................................... 58 . Intake Sensor Circuit ..............................................99
.
INSPECTION FLOW .......................................... 58 . COMPONENT DESCRIPTION ...........................99 .
SYSTEM DESCRIPTION ................................... 59 . DIAGNOSTIC PROCEDURE ............................ 100 .
COMPONENT DESCRIPTION ........................... 60 . AUTO AMP ............................................................. 102
.
DIAGNOSTIC PROCEDURE ............................. 60 . Removal and Installation ...................................... 102 .
MODE DOOR ..................................................... 60 . AMBIENT SENSOR ............................................... 103 .
Air Mix Door Motor Circuit ..................................... 61 . Removal and Installation ...................................... 103 .
INSPECTION FLOW .......................................... 61 . IN-VEHICLE SENSOR ........................................... 104 .
SYSTEM DESCRIPTION ................................... 62 . Removal and Installation ...................................... 104 .
COMPONENT DESCRIPTION ........................... 63 . SUNLOAD SENSOR .............................................. 105 .
DIAGNOSTIC PROCEDURE ............................. 63 . Removal and Installation ...................................... 105 .
AIR MIX DOOR .................................................. 63 . INTAKE SENSOR ................................................... 106 .
Intake Door Motor Circuit ....................................... 64 . Removal and Installation ...................................... 106 .
INSPECTION FLOW .......................................... 64 . THERMO CONTROL AMPLIFIER ......................... 107 .
SYSTEM DESCRIPTION ................................... 65 . Removal and Installation ...................................... 107 .
COMPONENT DESCRIPTION ........................... 66 . BLOWER UNIT ....................................................... 108
.
DIAGNOSTIC PROCEDURE ............................. 66 . Removal and Installation ...................................... 108 .
INTAKE DOOR ................................................... 66 . REMOVAL ........................................................ 108
.
Blower Motor Circuit .............................................. 67 . BLOWER MOTOR .................................................. 109 .
INSPECTION FLOW .......................................... 67 . Removal and Installation ...................................... 109 .
SYSTEM DESCRIPTION ................................... 68 . INTAKE DOOR MOTOR ......................................... 110 .
COMPONENT DESCRIPTION ........................... 69 . Removal and Installation ...................................... 110 .
DIAGNOSTIC PROCEDURE ............................. 69 . IN-CABIN MICROFILTER ....................................... 111 .
COMPONENT INSPECTION ............................. 73 . Removal and Installation ...................................... 111 .
Magnet Clutch Circuit ............................................ 74 . FUNCTION ....................................................... 111
.
INSPECTION FLOW .......................................... 74 . REPLACEMENT TIMING ................................. 111 .
SYSTEM DESCRIPTION ................................... 75 . REPLACEMENT PROCEDURES ..................... 111 .
DIAGNOSTIC PROCEDURE ............................. 75 . HEATER & COOLING UNIT ASSEMBLY .............. 112 .
COMPONENT INSPECTION ............................. 79 . Removal and Installation ...................................... 112 .
Insufficient Cooling ................................................ 80. REMOVAL ........................................................ 112
.
INSPECTION FLOW .......................................... 80 . INSTALLATION ................................................ 112 .
PERFORMANCE TEST DIAGNOSES ............... 81 . HEATER CORE ...................................................... 113.
PERFORMANCE CHART .................................. 82 . Removal and Installation ...................................... 113 .
TROUBLE DIAGNOSES FOR ABNORMAL MODE DOOR MOTOR ........................................... 114 .
PRESSURE ........................................................ 83 . Removal and Installation ...................................... 114 .
Insufficient Heating ................................................ 87. AIR MIX DOOR MOTOR ........................................ 115 .
INSPECTION FLOW .......................................... 87 . Removal and Installation ...................................... 115 .
Noise ..................................................................... 88
.
ATC-2
FAN CONTROL AMPLIFIER ..................................116 . INSTALLATION ................................................ 126 .
Removal and Installation ......................................116 . Removal and Installation for High-pressure Pipe . 126 A
DUCTS AND GRILLES ..........................................117 . REMOVAL ........................................................ 126 .
Removal and Installation ......................................117 . INSTALLATION ................................................ 126 .
Ventilator Duct, Defroster Nozzle and Defroster Removal and Installation for Refrigerant Pressure B
Ducts ....................................................................117
. Sensor ................................................................. 126
.
Center Ventilator Grille .........................................117 . Removal and Installation for Condenser ............. 126 .
Side Ventilator Grille LH .......................................117 . REMOVAL ........................................................ 126 .
Side Ventilator Grille RH ......................................118 . INSTALLATION ................................................ 127 . C
Floor duct .............................................................118
. Removal and Installation for Liquid Tank ............. 127 .
REFRIGERANT LINES ...........................................119 . Removal and Installation for Evaporator ............. 128 .
HFC-134a (R-134a) Service Procedure ...............119 . REMOVAL ........................................................ 128 . D
SETTING OF SERVICE TOOLS AND EQUIP- INSTALLATION ................................................ 129 .
MENT ................................................................119
. Removal and Installation for Expansion Valve ..... 129 .
Components ........................................................ 121 . Checking for Refrigerant Leaks ........................... 129 . E
Removal and Installation for Compressor ........... 122 . Checking System for Leaks Using the Fluorescent
REMOVAL ........................................................ 122 . Leak Detector ...................................................... 129
.
INSTALLATION ................................................ 122 . Dye Injection ........................................................ 130
.
Removal and Installation for Compressor Clutch . 123 Electronic Refrigerant Leak Detector ................... 130 . F
REMOVAL ........................................................ 123 . PRECAUTIONS FOR HANDLING LEAK
INSPECTION ................................................... 124 . DETECTOR ...................................................... 130 .
INSTALLATION ................................................ 124 . CHECKING PROCEDURE .............................. 131 . G
BREAK-IN OPERATION .................................. 125 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 133 .
Removal and Installation for Low-pressure Flexible Service Data and Specifications (SDS) ............... 133 .
Hose .................................................................... 125
. COMPRESSOR ............................................... 133 . H
REMOVAL ........................................................ 125 . LUBRICANT ..................................................... 133 .
INSTALLATION ................................................ 125 . REFRIGERANT ................................................ 133 .
Removal and Installation for High-pressure Flexible ENGINE IDLING SPEED ................................. 133 .
I
Hose .................................................................... 126
. BELT TENSION ................................................ 133 .
REMOVAL ........................................................ 126 .
ATC
K
L
M
ATC-3
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS000WP
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. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
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 harness connec-
tors.
Precautions for Working with HFC-134a (R-134a) EJS000WQ
WARNING:
q CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants
are mixed and 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 (ACR4) (J-39500-NI) 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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