Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Altima 2000-2005 Approved Nissan Altima 2004 MTC
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J AIR CONDITIONER
A
B
SECTION
MANUAL AIR CONDITIONER C
D
E
CONTENTS
PRECAUTIONS ......................................................... 4
. TRANSMISSION DATA AND TRANSMISSION F
Precautions for Supplemental Restraint System ORDER .............................................................. 23
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- INTAKE DOOR CONTROL ................................ 23 .
SIONER" ................................................................. 4
. Control Operation .................................................. 24
. G
Precautions for Working with HFC-134a (R-134a) 4 ..... FAN CONTROL DIAL ......................................... 24 .
Contaminated Refrigerant ....................................... 4 . MODE CONTROL DIAL ..................................... 24 .
General Refrigerant Precautions ............................. 5 . TEMPERATURE CONTROL DIAL ..................... 24 .
H
Precautions for Leak Detection Dye ........................ 5 . RECIRCULATION (REC) SWITCH .................... 24 .
A/C Identification Label ........................................... 6
. AIR CONDITIONER (A/C) SWITCH ................... 24 .
Precautions for Refrigerant Connection .................. 6 . Discharge Air Flow ................................................ 25
.
FEATURES OF NEW TYPE REFRIGERANT System Description ................................................ 26
. I
CONNECTION ..................................................... 6. SWITCHES AND THEIR CONTROL FUNCTION 26 ...
O-RING AND REFRIGERANT CONNECTION..... 7 CAN Communication System Description ............. 26 .
Precautions for Servicing Compressor .................. 10 . TROUBLE DIAGNOSIS ........................................... 27 . MTC
Precautions for Service Equipment ....................... 10 . How to Perform Trouble Diagnoses for Quick and
RECOVERY/RECYCLING EQUIPMENT ........... 10 . Accurate Repair ..................................................... 27
.
ELECTRONIC LEAK DETECTOR ..................... 10 . WORK FLOW ..................................................... 27 .
K
VACUUM PUMP .................................................11 . SYMPTOM TABLE ............................................. 27 .
MANIFOLD GAUGE SET ....................................11 . Component Parts and Harness Connector Location 28 ...
SERVICE HOSES ...............................................11 . ENGINE COMPARTMENT ................................. 28 .
SERVICE COUPLERS ....................................... 12 . PASSENGER COMPARTMENT ........................ 30 . L
CHARGING CYLINDER ..................................... 12 . Circuit Diagram ...................................................... 31
.
Wiring Diagrams and Trouble Diagnosis ............... 12 . Wiring Diagram -- HEATER -- ............................. 32 .
PREPARATION ........................................................ 13
. Wiring Diagram -- A/C,M -- .................................. 34 . M
Special Service Tools ............................................ 13
. Operational Check ................................................. 37
.
HFC-134a (R-134a) Service Tools and Equipment 13 ... CONDITIONS: .................................................... 37.
Commercial Service Tools ..................................... 16 . PROCEDURE: ................................................... 37 .
REFRIGERATION SYSTEM .................................... 17 . A/C System ............................................................ 39
.
Refrigeration Cycle ................................................ 17
. DIAGNOSTIC PROCEDURE ............................. 39 .
REFRIGERANT FLOW ...................................... 17 . Mode Door Motor Circuit ....................................... 41 .
REFRIGERANT SYSTEM PROTECTION ......... 17 . INSPECTION FLOW .......................................... 41 .
Component Layout ................................................ 18. SYSTEN DESCRIPTION .................................... 42 .
LUBRICANT ............................................................ 19
. DIAGNOSTIC PROCEDURE ............................. 42 .
Maintenance of Lubricant Quantity in Compressor 19 ... CONTROL LINKAGE ADJUSTMENT ................ 43 .
LUBRICANT ....................................................... 19
. Air Mix Door ........................................................... 44
.
CHECKING AND ADJUSTING .......................... 19 . INSPECTION FLOW .......................................... 44 .
AIR CONDITIONER CONTROL .............................. 22 . CONTROL LINKAGE ADJUSTMENT ................ 44 .
Overview Air Conditioner LAN Control System ..... 22 . Intake Door Motor Circuit ....................................... 45 .
System Construction ............................................. 22. INSPECTION FLOW .......................................... 45 .
OPERATION ...................................................... 22
. SYSTEM DESCRIPTION ................................... 45 .
Revision: May 2004 MTC-1 2004 Altima
DIAGNOSTIC PROCEDURE ............................. 46 . BLOWER FAN RESISTER .......................................75 .
CONTROL LINKAGE ADJUSTMENT ................ 47 . Removal and Installation ........................................75 .
Blower Motor Circuit .............................................. 48 . REMOVAL ...........................................................75 .
INSPECTION FLOW .......................................... 48 . INSTALLATION ...................................................75 .
DIAGNOSTIC PROCEDURE ............................. 48 . DUCTS AND GRILLES ............................................76 .
ELECTRICAL COMPONENTS INSPECTION .... 52 . Removal and Installation ........................................76 .
Magnet Clutch Circuit ............................................ 53 . REMOVAL ...........................................................76 .
INSPECTION FLOW .......................................... 53 . INSTALLATION ...................................................77 .
DIAGNOSTIC PROCEDURE ............................. 54 . REFRIGERANT LINES ............................................78 .
REFRIGERANT PRESSURE SENSOR ............. 56 . HFC-134a (R-134a) Service Procedure .................78 .
Insufficient Cooling ................................................ 57. SETTING OF SERVICE TOOLS AND EQUIP-
INSPECTION FLOW .......................................... 57 . MENT ..................................................................78
.
PERFORMANCE CHART .................................. 58 . Components ...........................................................79 .
TROUBLE DIAGNOSES FOR ABNORMAL Removal and Installation for Compressor --
PRESSURE ........................................................ 58 . QR25DE Models ....................................................82 .
Insufficient Heating ................................................ 62. REMOVAL ...........................................................82 .
INSPECTION FLOW .......................................... 62 . INSTALLATION ...................................................82 .
Noise ..................................................................... 63
. Removal and Installation for Compressor --
INSPECTION FLOW .......................................... 63 . VQ35DE Models ....................................................83 .
Intake Sensor Circuit ............................................. 64 . REMOVAL ...........................................................83 .
COMPONENT DESCRIPTION ........................... 64 . INSTALLATION ...................................................83 .
DIAGNOSTIC PROCEDURE ............................. 64 . Removal and Installation for Compressor Clutch ...84
CONTROL UNIT ....................................................... 66 . REMOVAL ...........................................................84 .
Removal and Installation ....................................... 66 . INSPECTION ......................................................85 .
REMOVAL .......................................................... 66 . INSTALLATION ...................................................85 .
INSTALLATION ................................................... 66 . BREAK-IN OPERATION .....................................86 .
INTAKE SENSOR .................................................... 67 . Removal and Installation for Low-pressure Flexible
Removal and Installation ....................................... 67 . Hose .......................................................................86
.
REMOVAL .......................................................... 67 . REMOVAL ...........................................................86 .
INSTALLATION ................................................... 67 . INSTALLATION ...................................................86 .
BLOWER UNIT ........................................................ 68 . Removal and Installation for High-pressure Flexible
Removal and Installation ....................................... 68 . Hose .......................................................................87
.
REMOVAL .......................................................... 68 . REMOVAL ...........................................................87 .
INSTALLATION ................................................... 68 . INSTALLATION ...................................................87 .
BLOWER MOTOR ................................................... 69 . Removal and Installation for High-pressure Pipe ...87
Removal and Installation ....................................... 69 . REMOVAL ...........................................................87 .
REMOVAL .......................................................... 69 . INSTALLATION ...................................................87 .
INSTALLATION ................................................... 69 . Removal and Installation for Refrigerant Pressure
INTAKE DOOR MOTOR .......................................... 70 . Sensor ....................................................................87
.
Removal and Installation ....................................... 70 . REMOVAL ...........................................................87 .
REMOVAL .......................................................... 70 . INSTALLATION ...................................................88 .
INSTALLATION ................................................... 70 . Removal and Installation for Condenser ................88 .
IN-CABIN MICROFILTER ........................................ 71 . REMOVAL ...........................................................88 .
Removal and Installation ....................................... 71 . INSTALLATION ...................................................88 .
FUNCTION ......................................................... 71 . Removal and Installation for Liquid Tank ...............89 .
REPLACEMENT TIMING ................................... 71 . REMOVAL ...........................................................89 .
REPLACEMENT PROCEDURES ...................... 71 . INSTALLATION ...................................................89 .
HEATER & COOLING UNIT ASSEMBLY ................ 72 . Removal and Installation for Evaporator ................89 .
Removal and Installation ....................................... 72 . REMOVAL ...........................................................89 .
REMOVAL .......................................................... 72 . INSTALLATION ...................................................90 .
INSTALLATION ................................................... 72 . Removal and Installation for Expansion Valve .......91 .
HEATER CORE ........................................................ 73 . REMOVAL ...........................................................91 .
Removal and Installation ....................................... 73 . INSTALLATION ...................................................91 .
REMOVAL .......................................................... 73 . Checking for Refrigerant Leaks .............................91 .
INSTALLATION ................................................... 73 . Checking System for Leaks Using the Fluorescent
MODE DOOR MOTOR ............................................. 74 . Leak Detector .........................................................91.
Removal and Installation ....................................... 74 . Dye Injection ..........................................................92
.
REMOVAL .......................................................... 74 . Electronic Refrigerant Leak Detector .....................92 .
INSTALLATION ................................................... 74 . PRECAUTIONS FOR HANDLING LEAK
Revision: May 2004 MTC-2 2004 Altima
DETECTOR ....................................................... 92
. SERVICE DATA AND SPECIFICATIONS (SDS) ..... 95 .
CHECKING PROCEDURE ................................ 93 . Service Data and Specifications (SDS) ................. 95 . A
COMPRESSOR ................................................. 95
.
LUBRICANT ....................................................... 95
.
REFRIGERANT .................................................. 95
. B
ENGINE IDLING SPEED ................................... 95 .
BELT TENSION .................................................. 95
.
C
D
E
F
G
H
I
MTC
K
L
M
Revision: May 2004 MTC-3 2004 Altima
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS0020W
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) EJS001ED
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 to MTC-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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