Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Altima 2000-2005 Approved Nissan Altima 2002 MTC
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J AIR CONDITIONER
A
SECTION
MANUAL AIR CONDITIONER
MTC B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 3
. FAN CONTROL DIAL ......................................... 21 . F
Precautions for Supplemental Restraint System AIR CONTROL DIAL .......................................... 21 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- TEMPERATURE CONTROL DIAL ..................... 21 .
SIONER" ................................................................. 3
. RECIRCULATION (REC) SWITCH .................... 21 . G
Precautions for Working with HFC-134a (R-134a) 3 ..... AIR CONDITIONER (A/C) SWITCH ................... 21 .
Contaminated Refrigerant ....................................... 3 . Discharge Air Flow ................................................ 22
.
General Refrigerant Precautions ............................. 4 . System Description ................................................ 23
.
H
Precautions for Leak Detection Dye ........................ 4 . SWITCHES AND THEIR CONTROL FUNCTION 23 ...
A/C Identification Label ........................................... 4
. CAN Communication System Description ............. 23 .
Precautions for Refrigerant Connection .................. 5 . FOR TCS MODELS ........................................... 23 .
FEATURES OF NEW TYPE REFRIGERANT FOR A/T MODELS ............................................. 25 . I
CONNECTION ..................................................... 5. FOR M/T MODELS ............................................ 26 .
O-RING AND REFRIGERANT CONNECTION ..... 6 TROUBLE DIAGNOSIS ........................................... 28 .
Precautions for Servicing Compressor .................... 9 . How to Perform Trouble Diagnoses for Quick and MTC
Precautions for Service Equipment ......................... 9 . Accurate Repair ..................................................... 28
.
RECOVERY/RECYCLING EQUIPMENT ............. 9 . WORK FLOW ..................................................... 28 .
ELECTRONIC LEAK DETECTOR ....................... 9 . SYMPTOM TABLE ............................................. 28 .
K
VACUUM PUMP ................................................ 10 . Component Parts and Harness Connector Location 29 ...
MANIFOLD GAUGE SET ................................... 10 . ENGINE COMPARTMENT ................................. 29 .
SERVICE HOSES .............................................. 10 . PASSENGER COMPARTMENT ........................ 31 .
SERVICE COUPLERS ........................................11 . Circuit Diagram ...................................................... 32
. L
REFRIGERANT WEIGHT SCALE ......................11 . Wiring Diagram -- HEATER -- ............................. 33 .
CALIBRATING ACR4 WEIGHT SCALE ..............11 . Wiring Diagram -- A/C,M -- .................................. 35 .
CHARGING CYLINDER ......................................11 . Operational Check ................................................. 38
. M
Wiring Diagrams and Trouble Diagnosis ................11 . CONDITIONS: .................................................... 38.
PREPARATION ........................................................ 12
. PROCEDURE: ................................................... 38 .
Special Service Tools ............................................ 12
. A/C System ............................................................ 40
.
HFC-134a (R-134a) Service Tools and Equipment 12 ... DIAGNOSTIC PROCEDURE ............................. 40 .
Commercial Service Tools ..................................... 15 . Mode Door Motor Circuit ....................................... 42 .
REFRIGERATION SYSTEM .................................... 16 . INSPECTION FLOW .......................................... 42 .
Refrigeration Cycle ................................................ 16
. SYSTEM DESCRIPTION ................................... 43 .
REFRIGERANT FLOW ...................................... 16 . DIAGNOSTIC PROCEDURE ............................. 43 .
REFRIGERANT SYSTEM PROTECTION ......... 16 . MODE DOOR ..................................................... 44 .
Component Layout ................................................ 17. Air Mix Door ........................................................... 45
.
LUBRICANT ............................................................ 18
. INSPECTION FLOW .......................................... 45 .
Maintenance of Lubricant Quantity in Compressor 18 ... CONTROL LINKAGE ADJUSTMENT ................ 45 .
LUBRICANT ....................................................... 18
. Intake Door Motor Circuit ....................................... 46 .
CHECKING AND ADJUSTING .......................... 18 . INSPECTION FLOW .......................................... 46 .
AIR CONDITIONER CONTROL .............................. 21 . SYSTEM DESCRIPTON .................................... 47 .
Control Operation .................................................. 21
. DIAGNOSTIC PROCEDURE ............................. 47 .
MTC-1
CONTROL LINKAGE ADJUSTMENT ................ 48 . Side Ventilator Grille RH ........................................78 .
Blower Motor Circuit .............................................. 49 . Floor duct ...............................................................78
.
INSPECTION FLOW .......................................... 49 . REFRIGERANT LINES ............................................79 .
DIAGNOSTIC PROCEDURE ............................. 49 . HFC-134a (R-134a) Service Procedure .................79 .
ELECTRICAL COMPONENTS INSPECTION .... 53 . SETTING OF SERVICE TOOLS AND EQUIP-
Magnet Clutch Circuit ............................................ 54 . MENT ..................................................................79
.
INSPECTION FLOW .......................................... 54 . Components ...........................................................80 .
DIAGNOSTIC PROCEDURE ............................. 55 . Removal and Installation for Compressor --
REFRIGERANT PRESSURE SENSOR ............. 57 . QR25DE Models ....................................................83 .
Insufficient Cooling ................................................ 58 . REMOVAL ..........................................................83 .
INSPECTION FLOW .......................................... 58 . INSTALLATION ..................................................83 .
PERFORMANCE CHART .................................. 59 . Removal and Installation for Compressor --
TROUBLE DIAGNOSES FOR ABNORMAL VQ35DE Models ....................................................84 .
PRESSURE ........................................................ 59 . REMOVAL ..........................................................84 .
Insufficient Heating ................................................ 63 . INSTALLATION ..................................................84 .
INSPECTION FLOW .......................................... 63 . Removal and Installation for Compressor Clutch ...85
Noise ..................................................................... 64
. REMOVAL ...........................................................85 .
INSPECTION FLOW .......................................... 64 . INSPECTION ......................................................86 .
Intake Sensor Circuit ............................................. 65 . INSTALLATION ...................................................86 .
COMPONENT DESCRIPTION ........................... 65 . BREAK-IN OPERATION .....................................87 .
DIAGNOSTIC PROCEDURE ............................. 65 . Removal and Installation for Low-pressure Flexible
CONTROL UNIT ....................................................... 67 . Hose .......................................................................87
.
Removal and Installation ....................................... 67 . REMOVAL ..........................................................87 .
REMOVAL .......................................................... 67 . INSTALLATION ..................................................87 .
INSTALLATION ................................................... 67 . Removal and Installation for High-pressure flexible
INTAKE SENSOR .................................................... 68 . hose .......................................................................88
.
Removal and Installation ....................................... 68 . REMOVAL ..........................................................88 .
BLOWER UNIT ........................................................ 69 . INSTALLATION ..................................................88 .
Removal and Installation ....................................... 69 . Removal and Installation for High-pressure Pipe ...88
REMOVAL .......................................................... 69 . REMOVAL ..........................................................88 .
BLOWER MOTOR ................................................... 70 . INSTALLATION ..................................................88 .
Removal and Installation ....................................... 70 . Removal and Installation for Refrigerant Pressure
INTAKE DOOR MOTOR .......................................... 71 . Sensor ....................................................................88
.
Removal and Installation ....................................... 71 . Removal and Installation for Condenser ................88 .
IN-CABIN MICROFILTER ........................................ 72 . REMOVAL ..........................................................88 .
Removal and Installation ....................................... 72 . INSTALLATION ..................................................89 .
FUNCTION ......................................................... 72 . Removal and Installation for Liquid Tank ...............89 .
REPLACEMENT TIMING ................................... 72 . Removal and Installation for Evaporator ................90 .
REPLACEMENT PROCEDURES ...................... 72 . REMOVAL ..........................................................90 .
HEATER & COOLING UNIT ASSEMBLY ................ 73 . INSTALLATION ..................................................91 .
Removal and Installation ....................................... 73 . Removal and Installation for Expansion Valve .......91 .
REMOVAL .......................................................... 73 . Checking for Refrigerant Leaks .............................91 .
INSTALLATION .................................................. 73 . Checking System for Leaks Using the Fluorescent
HEATER CORE ........................................................ 74 . Leak Detector .........................................................91.
Removal and Installation ....................................... 74 . Dye Injection ..........................................................92
.
MODE DOOR MOTOR ............................................. 75 . Electronic Refrigerant Leak Detector .....................92 .
Removal and Installation ....................................... 75 . PRECAUTIONS FOR HANDLING LEAK
DRIVER SIDE MODE DOOR MOTOR ............... 75 . DETECTOR ........................................................92 .
BLOWER FAN RESISTER ....................................... 76 . CHECKING PROCEDURE .................................93 .
Removal and Installation ....................................... 76 . SERVICE DATA AND SPECIFICATIONS (SDS) .....95 .
DUCTS AND GRILLES ............................................ 77 . Service Data and Specifications (SDS) .................95 .
Removal and Installation ....................................... 77 . COMPRESSOR ..................................................95 .
Ventilator Duct, Defroster Nozzle and Defroster LUBRICANT ........................................................95 .
Ducts ...................................................................... 77
. REFRIGERANT ..................................................95 .
Center Ventilator Grille .......................................... 77 . ENGINE IDLING SPEED ....................................95 .
Side Ventilator Grille LH ........................................ 77 . BELT TENSION ..................................................95 .
MTC-2
PRECAUTIONS
PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS000Z2
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B
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. C
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. D
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. E
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. F
Precautions for Working with HFC-134a (R-134a) EJS000Z3
WARNING: G
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-3, "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. H
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- I
lowing handling precautions must be observed:
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