Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Altima 2000-2005 Approved Nissan Altima 2005 ATC
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J AIR CONDITIONER
A
SECTION
AUTOMATIC AIR CONDITIONER
ATC B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 4
. Overview Air Conditioner LAN Control System ..... 21 . F
Precautions for Supplemental Restraint System System Construction ............................................. 21
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- OPERATION ...................................................... 21
.
SIONER" ................................................................. 4
. TRANSMISSION DATA AND TRANSMISSION G
Precautions for Working with HFC-134a (R-134a) 4 ..... ORDER .............................................................. 22
.
Contaminated Refrigerant ....................................... 4 . AIR MIX DOOR CONTROL (AUTOMATIC TEM-
General Refrigerant Precautions ............................. 5 . PERATURE CONTROL) .................................... 22 .
H
Precautions for Leak Detection Dye ........................ 5 . FAN SPEED CONTROL .................................... 23 .
A/C Identification Label ........................................... 6
. INTAKE DOOR CONTROL ................................ 23 .
Precautions for Refrigerant Connection .................. 6 . MODE DOOR CONTROL .................................. 23 .
FEATURES OF NEW TYPE REFRIGERANT MAGNET CLUTCH CONTROL .......................... 23 . I
CONNECTION ..................................................... 6. Overview of Control system ................................... 23 .
O-RING AND REFRIGERANT CONNECTION..... 7 Control Operation .................................................. 24
.
Precautions for Servicing Compressor .................. 10 . AUTO SWITCH .................................................. 25. ATC
Precautions for Service Equipment ....................... 10 . TEMPERATURE DIAL (POTENTIO TEMPERA-
RECOVERY/RECYCLING EQUIPMENT ........... 10 . TURE CONTROL) .............................................. 25 .
ELECTRONIC LEAK DETECTOR ..................... 10 . FAN AUTO SWITCH .......................................... 25 .
K
VACUUM PUMP .................................................11 . FAN DIAL/OFF SWITCH .................................... 25 .
MANIFOLD GAUGE SET ....................................11 . RECIRCULATION (REC) SWITCH .................... 25 .
SERVICE HOSES ...............................................11 . DEFROSTER SWITCH ...................................... 25 .
SERVICE COUPLERS ....................................... 12 . MODE DIAL ........................................................ 25
. L
REFRIGERANT WEIGHT SCALE ..................... 12 . REAR WINDOW DEFOGGER SWITCH ............ 25 .
CHARGING CYLINDER ..................................... 12 . Discharge Air Flow ................................................ 26
.
Wiring Diagrams and Trouble Diagnosis ............... 12 . System Description ................................................ 27
. M
PREPARATION ........................................................ 13
. SWITCHES AND THEIR CONTROL FUNCTION 27 ...
Special Service Tools ............................................ 13
. CAN Communication System Description ............. 27 .
HFC-134a (R-134a) Service Tools and Equipment 13 ... TROUBLE DIAGNOSIS ........................................... 28 .
Commercial Service Tools ..................................... 15 . How to Perform Trouble Diagnoses for Quick and
REFRIGERATION SYSTEM .................................... 17 . Accurate Repair ..................................................... 28
.
Refrigerant Cycle .................................................. 17
. WORK FLOW ..................................................... 28
.
REFRIGERANT FLOW ...................................... 17 . SYMPTOM TABLE ............................................. 28 .
Refrigerant System Protection .............................. 17 . Component Parts and Harness Connector Location 29 ...
REFRIGERANT PRESSURE SENSOR ............ 17 . ENGINE COMPARTMENT ................................. 29 .
PRESSURE RELIEF VALVE ............................. 17 . PASSENGER COMPARTMENT ........................ 31 .
Component Layout ................................................ 18. Circuit Diagram ...................................................... 32
.
LUBRICANT ............................................................ 19
. Wiring Diagram -- A/C,A -- .................................. 33 .
Maintenance of Lubricant Quantity in Compressor 19 ... Front Air Control Terminals and Reference Value... 37
LUBRICANT ....................................................... 19
. INSPECTION OF FRONT AIR CONTROL ......... 37 .
CHECKING AND ADJUSTING .......................... 19 . FRONT AIR CONTROL HARNESS CONNEC-
AIR CONDITIONER CONTROL .............................. 21 . TOR TERMINAL LAYOUT .................................. 37 .
Revision: March 2005 ATC-1 2005 Altima
FRONT AIR CONTROL INSPECTION TABLE ... 37 DIAGNOSTIC PROCEDURE ..............................81 .
Operational Check ................................................. 39 . COMPONENT INSPECTION ..............................83 .
CONDITIONS: .................................................... 39 . Intake Sensor Circuit ..............................................84
.
PROCEDURE: .................................................... 39 . COMPONENT DESCRIPTION ...........................84 .
Power Supply and Ground Circuit for Front Air Con- DIAGNOSTIC PROCEDURE ..............................84 .
trol .......................................................................... 41
. CONTROL UNIT .......................................................87
.
COMPONENT DESCRIPTION ........................... 41 . Removal and Installation ........................................87
.
DIAGNOSTIC PROCEDURE ............................. 41 . FRONT AIR CONTROL ......................................87 .
LAN System Circuit ............................................... 42 . AMBIENT SENSOR .................................................88 .
DIAGNOSTIC PROCEDURE ............................. 43 . Removal and Installation ........................................88
.
Mode Door Motor Circuit ....................................... 46 . REMOVAL ...........................................................88
.
INSPECTION FLOW .......................................... 46 . INSTALLATION ...................................................88
.
SYSTEM DESCRIPTION ................................... 47 . IN-VEHICLE SENSOR .............................................89 .
COMPONENT DESCRIPTION ........................... 48 . Removal and Installation ........................................89
.
DIAGNOSTIC PROCEDURE ............................. 48 . REMOVAL ...........................................................89
.
Air Mix Door Motor Circuit ..................................... 49 . INSTALLATION ...................................................89
.
INSPECTION FLOW .......................................... 49 . SUNLOAD SENSOR ................................................90 .
SYSTEM DESCRIPTION ................................... 50 . Removal and Installation ........................................90
.
COMPONENT DESCRIPTION ........................... 51 . REMOVAL ...........................................................90
.
DIAGNOSTIC PROCEDURE ............................. 51 . INSTALLATION ...................................................90
.
Intake Door Motor Circuit ....................................... 52 . INTAKE SENSOR .....................................................91
.
INSPECTION FLOW .......................................... 52 . Removal and Installation ........................................91
.
SYSTEM DESCRIPTION ................................... 53 . REMOVAL ...........................................................91
.
COMPONENT DESCRIPTION ........................... 54 . INSTALLATION ...................................................91
.
DIAGNOSTIC PROCEDURE ............................. 54 . BLOWER UNIT .........................................................92
.
Blower Motor Circuit .............................................. 55 . Removal and Installation ........................................92
.
INSPECTION FLOW .......................................... 55 . REMOVAL ...........................................................92
.
SYSTEM DESCRIPTION ................................... 56 . INSTALLATION ...................................................92
.
COMPONENT DESCRIPTION ........................... 57 . BLOWER MOTOR ....................................................93 .
DIAGNOSTIC PROCEDURE ............................. 57 . Removal and Installation ........................................93
.
COMPONENT INSPECTION ............................. 61 . REMOVAL ...........................................................93
.
Magnet Clutch Circuit ............................................ 62 . INSTALLATION ...................................................93
.
INSPECTION FLOW .......................................... 62 . IN-CABIN MICROFILTER .........................................94 .
SYSTEM DESCRIPTION ................................... 63 . Removal and Installation ........................................94
.
DIAGNOSTIC PROCEDURE ............................. 63 . FUNCTION .........................................................94
.
COMPONENT INSPECTION ............................. 66 . REPLACEMENT TIMING ...................................94 .
Insufficient Cooling ................................................ 67 . REPLACEMENT PROCEDURES .......................94 .
INSPECTION FLOW .......................................... 67 . HEATER & COOLING UNIT ASSEMBLY ................95 .
PERFORMANCE TEST ANALYSIS ................... 68 . Removal and Installation ........................................95
.
PERFORMANCE CHART .................................. 70 . REMOVAL ...........................................................95
.
TROUBLE DIAGNOSIS FOR ABNORMAL INSTALLATION ...................................................95
.
PRESSURE ........................................................ 70 . HEATER CORE ........................................................96
.
Insufficient Heating ................................................ 74 . Removal and Installation ........................................96
.
INSPECTION FLOW .......................................... 74 . REMOVAL ...........................................................96
.
Noise ..................................................................... 75
. INSTALLATION ...................................................96
.
INSPECTION FLOW .......................................... 75 . INTAKE DOOR MOTOR ...........................................97 .
Ambient Sensor Circuit .......................................... 76 . Removal and Installation ........................................97
.
COMPONENT DESCRIPTION ........................... 76 . REMOVAL ...........................................................97
.
AMBIENT TEMPERATURE INPUT PROCESS... 76 INSTALLATION ...................................................97
.
DIAGNOSTIC PROCEDURE ............................. 76 . MODE DOOR MOTOR .............................................98 .
COMPONENT INSPECTION ............................. 78 . Removal and Installation ........................................98
.
In-vehicle Sensor Circuit ........................................ 78 . REMOVAL ...........................................................98
.
COMPONENT DESCRIPTION ........................... 78 . INSTALLATION ...................................................98
.
DIAGNOSTIC PROCEDURE ............................. 79 . AIR MIX DOOR MOTOR ..........................................99 .
COMPONENT INSPECTION ............................. 80 . Removal and Installation ........................................99
.
Sunload Sensor Circuit .......................................... 81 . REMOVAL ...........................................................99
.
COMPONENT DESCRIPTION ........................... 81 . INSTALLATION ...................................................99
.
SUNLOAD INPUT PROCESS ............................ 81 .
Revision: March 2005 ATC-2 2005 Altima
FAN CONTROL AMPLIFIER ................................. 100 . REMOVAL ........................................................ 112 .
Removal and Installation ..................................... 100 . INSTALLATION ................................................ 112 . A
REMOVAL ........................................................ 100 . Removal and Installation for High-pressure Pipe . 112
INSTALLATION ................................................ 100 . REMOVAL ........................................................ 112 .
DUCTS AND GRILLES ......................................... 101 . INSTALLATION ................................................ 112 . B
Removal and Installation ..................................... 101 . Removal and Installation for Refrigerant Pressure
REMOVAL ........................................................ 101 . Sensor ................................................................. 113
.
INSTALLATION ................................................ 102 . REMOVAL ........................................................ 113 .
REFRIGERANT LINES .......................................... 103 . INSTALLATION ................................................ 113 . C
HFC-134a (R-134a) Service Procedure .............. 103 . Removal and Installation for Condenser ............. 113 .
SETTING OF SERVICE TOOLS AND EQUIP- REMOVAL ........................................................ 113 .
MENT ............................................................... 103
. INSTALLATION ................................................ 114 . D
Components ........................................................ 105 . Removal and Installation for Evaporator ............. 114 .
Removal and Installation for Compressor -- REMOVAL ........................................................ 114 .
QR25DE Models ................................................. 107 . INSTALLATION ................................................ 115 . E
REMOVAL ........................................................ 107 . Removal and Installation for Expansion Valve ..... 115 .
INSTALLATION ................................................ 107 . REMOVAL ........................................................ 115 .
Removal and Installation for Compressor -- INSTALLATION ................................................ 116 .
VQ35DE Models ................................................. 108 . Checking for Refrigerant Leaks ........................... 116 . F
REMOVAL ........................................................ 108 . Checking System for Leaks Using the Fluorescent
INSTALLATION ................................................ 108 . Leak Detector ...................................................... 116
.
Removal and Installation for Compressor Clutch . 108 Dye Injection ........................................................ 116
. G
REMOVAL ........................................................ 108 . Electronic Refrigerant Leak Detector ................... 117 .
INSPECTION AFTER REMOVAL .....................110 . PRECAUTIONS FOR HANDLING THE LEAK
INSTALLATION .................................................110 . DETECTOR ...................................................... 117 . H
INSPECTION AFTER INSTALLATION ............. 111 . CHECKING PROCEDURE .............................. 118 .
BREAK-IN OPERATION ................................... 111 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 120 .
Removal and Installation for Low-pressure Flexible Service Data and Specifications (SDS) ............... 120 .
I
Hose .....................................................................112
. COMPRESSOR ............................................... 120 .
REMOVAL .........................................................112 . LUBRICANT ..................................................... 120 .
INSTALLATION .................................................112 . REFRIGERANT ................................................ 120 .
Removal and Installation for High-pressure Flexible ENGINE IDLING SPEED ................................. 120 . ATC
Hose .....................................................................112
. BELT TENSION ................................................ 120 .
K
L
M
Revision: March 2005 ATC-3 2005 Altima
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS002PJ
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) EJS002PK
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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