Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Altima 2000-2005 Approved Nissan Altima 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) .................................... 22 .
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. Overview of Control system ................................... 23 .
O-RING AND REFRIGERANT CONNECTION..... 7 Control Operation .................................................. 24
.
Precautions for Servicing Compressor .................... 9 . DISPLAY SCREEN ............................................ 24 . ATC
Precautions for Service Equipment ......................... 9 . AUTO SWITCH .................................................. 25.
RECOVERY/RECYCLING EQUIPMENT ............. 9 . ECON (ECONOMY) SWITCH ............................ 25 .
ELECTRONIC LEAK DETECTOR ....................... 9 . TEMPERATURE DIAL (POTENTIO TEMPERA-
K
VACUUM PUMP ................................................ 10 . TURE CONTROL) .............................................. 25 .
MANIFOLD GAUGE SET ................................... 10 . OFF SWITCH ..................................................... 25
.
SERVICE HOSES .............................................. 10 . FAN SWITCH ..................................................... 25
.
SERVICE COUPLERS ........................................11 . RECIRCULATION (REC) SWITCH .................... 25 . L
CHARGING CYLINDER ......................................11 . DEFROSTER (DEF) SWITCH ............................ 25 .
Wiring Diagrams and Trouble Diagnosis ................11 . MODE SWITCH ................................................. 25 .
PREPARATION ........................................................ 12
. REAR WINDOW DEFOGGER SWITCH ............ 25 . M
Special Service Tools ............................................ 12
. Discharge Air Flow ................................................ 26
.
HFC-134a (R-134a) Service Tools and Equipment 12 ... System Description ................................................ 27
.
Commercial Service Tools ..................................... 15 . SWITCHES AND THEIR CONTROL FUNCTION 27 ...
REFRIGERATION SYSTEM .................................... 16 . CAN Communication System Description ............. 27 .
Refrigerant Cycle .................................................. 16
. TROUBLE DIAGNOSIS ........................................... 28 .
REFRIGERANT FLOW ...................................... 16 . How to Perform Trouble Diagnoses for Quick and
Refrigerant System Protection .............................. 16 . Accurate Repair ..................................................... 28
.
REFRIGERANT PRESSURE SENSOR ............ 16 . WORK FLOW ..................................................... 28
.
PRESSURE RELIEF VALVE ............................. 16 . SYMPTOM TABLE ............................................. 28 .
Component Layout ................................................ 17. Component Parts and Harness Connector Location 29 ...
LUBRICANT ............................................................ 18
. ENGINE COMPARTMENT ................................. 29 .
Maintenance of Lubricant Quantity in Compressor 18 ... PASSENGER COMPARTMENT ........................ 30 .
LUBRICANT ....................................................... 18
. Circuit Diagram ...................................................... 31
.
CHECKING AND ADJUSTING .......................... 18 . Wiring Diagram -- A/C,A -- .................................. 32 .
AIR CONDITIONER CONTROL .............................. 21 . Auto Amp. Terminals and Reference Value ........... 36 .
Overview Air Conditioner LAN Control System ..... 21 . INSPECTION OF AUTO AMP. ........................... 36 .
Revision: May 2004 ATC-1 2004 Altima
A/C AUTO AMP. HARNESS CONNECTOR TER- Memory Function ...................................................88
.
MINAL LAYOUT ................................................. 36 . INSPECTION FLOW ...........................................88 .
AUTO AMP. INSPECTION TABLE ..................... 36 . ECON (ECONOMY) Mode .....................................89 .
Self-diagnosis ........................................................ 38
. INSPECTION FLOW ...........................................89 .
DESCRIPTION ................................................... 38 . Ambient Sensor Circuit ..........................................89.
FUNCTION CONFIRMATION PROCEDURE ..... 39 . COMPONENT DESCRIPTION ...........................89 .
AUXILIARY MECHANISM: TEMPERATURE AMBIENT TEMPERATURE INPUT PROCESS ...89
SETTING TRIMMER .......................................... 45 . DIAGNOSTIC PROCEDURE ..............................90 .
Operational Check ................................................. 46 . COMPONENT INSPECTION ..............................91 .
CONDITIONS: .................................................... 46 . In-vehicle Sensor Circuit ........................................92
.
PROCEDURE: .................................................... 46 . COMPONENT DESCRIPTION ...........................92 .
Power Supply and Ground Circuit for Auto Amp. ... 49 DIAGNOSTIC PROCEDURE ..............................92 .
COMPONENT DESCRIPTION ........................... 49 . COMPONENT INSPECTION ..............................94 .
DIAGNOSTIC PROCEDURE ............................. 50 . Sunload Sensor Circuit ..........................................94.
LAN System Circuit ............................................... 51 . COMPONENT DESCRIPTION ...........................94 .
DIAGNOSTIC PROCEDURE ............................. 51 . SUNLOAD INPUT PROCESS ............................95 .
Mode Door Motor Circuit ....................................... 55 . DIAGNOSTIC PROCEDURE ..............................95 .
INSPECTION FLOW .......................................... 55 . COMPONENT INSPECTION ..............................97 .
SYSTEM DESCRIPTION ................................... 56 . Intake Sensor Circuit ..............................................98
.
COMPONENT DESCRIPTION ........................... 57 . COMPONENT DESCRIPTION ...........................98 .
DIAGNOSTIC PROCEDURE ............................. 57 . DIAGNOSTIC PROCEDURE ..............................98 .
MODE DOOR ..................................................... 57 . AUTO AMP ............................................................. 101
.
Air Mix Door Motor Circuit ..................................... 58 . Removal and Installation ...................................... 101.
INSPECTION FLOW .......................................... 58 . REMOVAL ......................................................... 101
.
SYSTEM DESCRIPTION ................................... 59 . INSTALLATION ................................................. 101
.
COMPONENT DESCRIPTION ........................... 60 . AMBIENT SENSOR ............................................... 102 .
DIAGNOSTIC PROCEDURE ............................. 60 . Removal and Installation ...................................... 102.
AIR MIX DOOR .................................................. 60 . REMOVAL ......................................................... 102
.
Intake Door Motor Circuit ....................................... 61 . INSTALLATION ................................................. 102
.
INSPECTION FLOW .......................................... 61 . IN-VEHICLE SENSOR ........................................... 103 .
SYSTEM DESCRIPTION ................................... 62 . Removal and Installation ...................................... 103.
COMPONENT DESCRIPTION ........................... 63 . REMOVAL ......................................................... 103
.
INTAKE DOOR ................................................... 63 . INSTALLATION ................................................. 103
.
DIAGNOSTIC PROCEDURE ............................. 63 . SUNLOAD SENSOR .............................................. 104 .
Blower Motor Circuit .............................................. 64 . Removal and Installation ...................................... 104.
INSPECTION FLOW .......................................... 64 . REMOVAL ......................................................... 104
.
SYSTEM DESCRIPTION ................................... 65 . INSTALLATION ................................................. 104
.
COMPONENT DESCRIPTION ........................... 66 . INTAKE SENSOR ................................................... 105.
DIAGNOSTIC PROCEDURE ............................. 66 . Removal and Installation ...................................... 105.
COMPONENT INSPECTION ............................. 70 . REMOVAL ......................................................... 105
.
Magnet Clutch Circuit ............................................ 72 . INSTALLATION ................................................. 105
.
INSPECTION FLOW .......................................... 72 . THERMO CONTROL AMPLIFIER ......................... 106 .
SYSTEM DESCRIPTION ................................... 73 . Removal and Installation ...................................... 106.
DIAGNOSTIC PROCEDURE ............................. 73 . REMOVAL ......................................................... 106
.
COMPONENT INSPECTION ............................. 77 . INSTALLATION ................................................. 106
.
Insufficient Cooling ................................................ 78. BLOWER UNIT ....................................................... 107
.
INSPECTION FLOW .......................................... 78 . Removal and Installation ...................................... 107.
PERFORMANCE TEST ANALYSIS ................... 79 . REMOVAL ......................................................... 107
.
PERFORMANCE CHART .................................. 81 . INSTALLATION ................................................. 107
.
TROUBLE DIAGNOSIS FOR ABNORMAL BLOWER MOTOR .................................................. 108 .
PRESSURE ........................................................ 81 . Removal and Installation ...................................... 108.
Insufficient Heating ................................................ 85. REMOVAL ......................................................... 108
.
INSPECTION FLOW .......................................... 85 . INSTALLATION ................................................. 108
.
Noise ..................................................................... 86
. INTAKE DOOR MOTOR ......................................... 109 .
INSPECTION FLOW .......................................... 86 . Removal and Installation ...................................... 109.
Self-diagnosis ........................................................ 87
. REMOVAL ......................................................... 109
.
INSPECTION FLOW .......................................... 87 . INSTALLATION ................................................. 109
.
Revision: May 2004 ATC-2 2004 Altima
IN-CABIN MICROFILTER .......................................110 . BREAK-IN OPERATION ................................... 124 .
Removal and Installation ......................................110 . Removal and Installation for Low-pressure Flexible A
FUNCTION ........................................................110
. Hose .................................................................... 124
.
REPLACEMENT TIMING ..................................110 . REMOVAL ........................................................ 124 .
REPLACEMENT PROCEDURES .....................110 . INSTALLATION ................................................ 124 . B
HEATER & COOLING UNIT ASSEMBLY .............. 111 . Removal and Installation for High-pressure Flexible
Removal and Installation ...................................... 111 . Hose .................................................................... 125
.
REMOVAL ......................................................... 111
. REMOVAL ........................................................ 125 .
INSTALLATION ................................................. 111 . INSTALLATION ................................................ 125 . C
HEATER CORE ......................................................112 . Removal and Installation for High-pressure Pipe . 125
Removal and Installation ......................................112 . REMOVAL ........................................................ 125 .
REMOVAL .........................................................112
. INSTALLATION ................................................ 125 . D
INSTALLATION .................................................112 . Removal and Installation for Refrigerant Pressure
MODE DOOR MOTOR ...........................................113 . Sensor ................................................................. 125
.
Removal and Installation ......................................113 . REMOVAL ........................................................ 125 . E
REMOVAL .........................................................113
. INSTALLATION ................................................ 126 .
INSTALLATION .................................................113 . Removal and Installation for Condenser ............. 126 .
AIR MIX DOOR MOTOR .........................................114 . REMOVAL ........................................................ 126 .
Removal and Installation ......................................114 . INSTALLATION ................................................ 126 . F
REMOVAL .........................................................114
. Removal and Installation for Evaporator ............. 127 .
INSTALLATION .................................................114 . REMOVAL ........................................................ 127 .
FAN CONTROL AMPLIFIER ..................................115 . INSTALLATION ................................................ 128 . G
Removal and Installation ......................................115 . Removal and Installation for Expansion Valve ..... 128 .
REMOVAL .........................................................115
. REMOVAL ........................................................ 128 .
INSTALLATION .................................................115 . INSTALLATION ................................................ 128 . H
DUCTS AND GRILLES ..........................................116 . Checking for Refrigerant Leaks ........................... 128 .
Removal and Installation ......................................116 . Checking System for Leaks Using the Fluorescent
REMOVAL .........................................................116
. Leak Detector ...................................................... 129.
I
INSTALLATION .................................................117 . Dye Injection ........................................................ 129
.
REFRIGERANT LINES ...........................................118 . Electronic Refrigerant Leak Detector ................... 129 .
HFC-134a (R-134a) Service Procedure ...............118 . PRECAUTIONS FOR HANDLING LEAK
SETTING OF SERVICE TOOLS AND EQUIP- DETECTOR ...................................................... 129 . ATC
MENT ................................................................118
. CHECKING PROCEDURE .............................. 130 .
Components ........................................................ 120
. SERVICE DATA AND SPECIFICATIONS (SDS) ... 132 .
Removal and Installation for Compressor ........... 121 . Service Data and Specifications (SDS) ............... 132 . K
REMOVAL ........................................................ 121
. COMPRESSOR ............................................... 132 .
INSTALLATION ................................................ 121 . LUBRICANT ..................................................... 132 .
Removal and Installation for Compressor Clutch . 122 REFRIGERANT ................................................ 132 . L
REMOVAL ........................................................ 122
. ENGINE IDLING SPEED ................................. 132 .
INSPECTION ................................................... 123 . BELT TENSION ................................................ 132 .
INSTALLATION ................................................ 123 .
M
Revision: May 2004 ATC-3 2004 Altima
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS0020V
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) EJS001C0
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 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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