Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Altima 2000-2005 Approved Nissan Altima 2005 MTC
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J AIR CONDITIONER
A
SECTION
MANUAL AIR CONDITIONER
MTC 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 ................................ 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
. MODE DOOR CONTROL .................................. 23 .
Precautions for Refrigerant Connection .................. 6 . MAGNET CLUTCH CONTROL .......................... 23 .
FEATURES OF NEW TYPE REFRIGERANT Overview of Control system ................................... 23 . I
CONNECTION ..................................................... 6. Control Operation .................................................. 24
.
O-RING AND REFRIGERANT CONNECTION..... 7 AIR CONDITIONER (A/C) SWITCH ................... 25 .
Precautions for Servicing Compressor .................. 10 . TEMPERATURE DIAL (POTENTIO TEMPERA- MTC
Precautions for Service Equipment ....................... 10 . TURE CONTROL) .............................................. 25 .
RECOVERY/RECYCLING EQUIPMENT ........... 10 . FAN DIAL/OFF SWITCH .................................... 25 .
ELECTRONIC LEAK DETECTOR ..................... 10 . RECIRCULATION (REC) SWITCH .................... 25 .
K
VACUUM PUMP .................................................11 . DEFROSTER SWITCH ...................................... 25 .
MANIFOLD GAUGE SET ....................................11 . MODE DIAL ........................................................ 25
.
SERVICE HOSES ...............................................11 . REAR WINDOW DEFOGGER SWITCH ............ 25 .
SERVICE COUPLERS ....................................... 12 . Discharge Air Flow ................................................ 26
. L
REFRIGERANT WEIGHT SCALE ..................... 12 . System Description ................................................ 27
.
CHARGING CYLINDER ..................................... 12 . SWITCHES AND THEIR CONTROL FUNCTION 27 ...
Wiring Diagrams and Trouble Diagnosis ............... 12 . CAN Communication System Description ............. 27 . M
PREPARATION ........................................................ 13
. TROUBLE DIAGNOSIS ........................................... 28 .
Special Service Tools ............................................ 13
. How to Perform Trouble Diagnoses for Quick and
HFC-134a (R-134a) Service Tools and Equipment 13 ... Accurate Repair ..................................................... 28
.
Commercial Service Tools ..................................... 16 . WORK FLOW ..................................................... 28
.
REFRIGERATION SYSTEM .................................... 17 . SYMPTOM TABLE ............................................. 28 .
Refrigerant Cycle .................................................. 17
. Component Parts and Harness Connector Location 29 ...
REFRIGERANT FLOW ...................................... 17 . ENGINE COMPARTMENT ................................. 29 .
Refrigerant System Protection .............................. 17 . PASSENGER COMPARTMENT ........................ 31 .
REFRIGERANT PRESSURE SENSOR ............ 17 . Circuit Diagram ...................................................... 32
.
PRESSURE RELIEF VALVE ............................. 17 . Wiring Diagram -- HEATER -- ............................. 33 .
Component Layout ................................................ 18. Wiring Diagram -- A/C,M -- .................................. 35 .
LUBRICANT ............................................................ 19
. Front Air Control Terminals and Reference Value... 38
Maintenance of Lubricant Quantity in Compressor 19 ... INSPECTION OF FRONT AIR CONTROL ......... 38 .
LUBRICANT ....................................................... 19
. FRONT AIR CONTROL HARNESS CONNEC-
CHECKING AND ADJUSTING .......................... 19 . TOR TERMINAL LAYOUT .................................. 38 .
AIR CONDITIONER CONTROL .............................. 21 . FRONT AIR CONTROL INSPECTION TABLE ... 38
Revision: March 2005 MTC-1 2005 Altima
Operational Check ................................................. 40 . BLOWER MOTOR ....................................................79 .
CONDITIONS: .................................................... 40 . Removal and Installation ........................................79 .
PROCEDURE: .................................................... 40 . REMOVAL ...........................................................79 .
Power Supply and Ground Circuit for Front Air Con- INSTALLATION ...................................................79 .
trol .......................................................................... 42
. IN-CABIN MICROFILTER .........................................80 .
COMPONENT DESCRIPTION ........................... 42 . Removal and Installation ........................................80 .
DIAGNOSTIC PROCEDURE ............................. 42 . FUNCTION .........................................................80 .
LAN System Circuit ............................................... 44 . REPLACEMENT TIMING ...................................80 .
DIAGNOSTIC PROCEDURE ............................. 44 . REPLACEMENT PROCEDURES .......................80 .
Mode Door Motor Circuit ....................................... 47 . HEATER & COOLING UNIT ASSEMBLY ................81 .
INSPECTION FLOW .......................................... 47 . Removal and Installation ........................................81 .
SYSTEM DESCRIPTION ................................... 48 . REMOVAL ...........................................................81 .
COMPONENT DESCRIPTION ........................... 48 . INSTALLATION ...................................................81 .
DIAGNOSTIC PROCEDURE ............................. 48 . HEATER CORE ........................................................82 .
Air Mix Door Motor Circuit ..................................... 49 . Removal and Installation ........................................82 .
INSPECTION FLOW .......................................... 49 . REMOVAL ...........................................................82 .
SYSTEM DESCRIPTION ................................... 50 . INSTALLATION ...................................................82 .
COMPONENT DESCRIPTION ........................... 50 . INTAKE DOOR MOTOR ...........................................83 .
DIAGNOSTIC PROCEDURE ............................. 50 . Removal and Installation ........................................83 .
Intake Door Motor Circuit ....................................... 51 . REMOVAL ...........................................................83 .
INSPECTION FLOW .......................................... 51 . INSTALLATION ...................................................83 .
SYSTEM DESCRIPTION ................................... 52 . MODE DOOR MOTOR .............................................84 .
COMPONENT DESCRIPTION ........................... 52 . Removal and Installation ........................................84 .
DIAGNOSTIC PROCEDURE ............................. 52 . REMOVAL ...........................................................84 .
Blower Motor Circuit .............................................. 53 . INSTALLATION ...................................................84 .
INSPECTION FLOW .......................................... 53 . AIR MIX DOOR MOTOR ..........................................85 .
SYSTEM DESCRIPTION ................................... 54 . Removal and Installation ........................................85 .
COMPONENT DESCRIPTION ........................... 54 . REMOVAL ...........................................................85 .
DIAGNOSTIC PROCEDURE ............................. 54 . INSTALLATION ...................................................85 .
COMPONENT INSPECTION ............................. 58 . FAN CONTROL AMPLIFIER ....................................86 .
Magnet Clutch Circuit ............................................ 59 . Removal and Installation ........................................86 .
INSPECTION FLOW .......................................... 59 . REMOVAL ...........................................................86 .
SYSTEM DESCRIPTION ................................... 60 . INSTALLATION ...................................................86 .
DIAGNOSTIC PROCEDURE ............................. 60 . DUCTS AND GRILLES ............................................87 .
COMPONENT INSPECTION ............................. 62 . Removal and Installation ........................................87 .
Insufficient Cooling ................................................ 64 . REMOVAL ...........................................................87 .
INSPECTION FLOW .......................................... 64 . INSTALLATION ...................................................88 .
PERFORMANCE TEST ANALYSIS ................... 65 . REFRIGERANT LINES ............................................89 .
PERFORMANCE CHART .................................. 67 . HFC-134a (R-134a) Service Procedure .................89 .
TROUBLE DIAGNOSIS FOR ABNORMAL SETTING OF SERVICE TOOLS AND EQUIP-
PRESSURE ........................................................ 67 . MENT ..................................................................89
.
Insufficient Heating ................................................ 71 . Components ...........................................................91 .
INSPECTION FLOW .......................................... 71 . Removal and Installation for Compressor --
Noise ..................................................................... 72
. QR25DE Models ....................................................93 .
INSPECTION FLOW .......................................... 72 . REMOVAL ...........................................................93 .
Intake Sensor Circuit ............................................. 73 . INSTALLATION ...................................................93 .
COMPONENT DESCRIPTION ........................... 73 . Removal and Installation for Compressor --
DIAGNOSTIC PROCEDURE ............................. 73 . VQ35DE Models ....................................................94 .
CONTROL UNIT ....................................................... 76 . REMOVAL ...........................................................94 .
Removal and Installation ....................................... 76 . INSTALLATION ...................................................94 .
FRONT AIR CONTROL ...................................... 76 . Removal and Installation for Compressor Clutch ...94
INTAKE SENSOR .................................................... 77 . REMOVAL ...........................................................94 .
Removal and Installation ....................................... 77 . INSPECTION AFTER REMOVAL .......................96 .
REMOVAL .......................................................... 77 . INSTALLATION ...................................................96 .
INSTALLATION ................................................... 77 . INSPECTION AFTER INSTALLATION ...............97 .
BLOWER UNIT ........................................................ 78 . BREAK-IN OPERATION .....................................97 .
Removal and Installation ....................................... 78 . Removal and Installation for Low-pressure Flexible
REMOVAL .......................................................... 78 . Hose .......................................................................98
.
INSTALLATION ................................................... 78 . REMOVAL ...........................................................98 .
Revision: March 2005 MTC-2 2005 Altima
INSTALLATION .................................................. 98 . Removal and Installation for Expansion Valve ..... 101 .
Removal and Installation for High-pressure Flexible REMOVAL ........................................................ 101
. A
Hose ...................................................................... 98
. INSTALLATION ................................................ 102 .
REMOVAL .......................................................... 98 . Checking for Refrigerant Leaks ........................... 102 .
INSTALLATION .................................................. 98 . Checking System for Leaks Using the Fluorescent B
Removal and Installation for High-pressure Pipe ... 98 Leak Detector ...................................................... 102
.
REMOVAL .......................................................... 98 . Dye Injection ........................................................ 102
.
INSTALLATION .................................................. 98 . Electronic Refrigerant Leak Detector ................... 103 .
Removal and Installation for Refrigerant Pressure PRECAUTIONS FOR HANDLING THE LEAK C
Sensor ................................................................... 99
. DETECTOR ...................................................... 103.
REMOVAL .......................................................... 99 . CHECKING PROCEDURE .............................. 104 .
INSTALLATION .................................................. 99 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 106 . D
Removal and Installation for Condenser ............... 99 . Service Data and Specifications (SDS) ............... 106 .
REMOVAL .......................................................... 99 . COMPRESSOR ............................................... 106 .
INSTALLATION ................................................ 100 . LUBRICANT ..................................................... 106. E
Removal and Installation for Evaporator ............. 100 . REFRIGERANT ................................................ 106 .
REMOVAL ........................................................ 100 . ENGINE IDLING SPEED ................................. 106 .
INSTALLATION ................................................ 101 . BELT TENSION ................................................ 106 .
F
G
H
I
MTC
K
L
M
Revision: March 2005 MTC-3 2005 Altima
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS002RO
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) EJS002RP
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 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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