Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Maxima 2000-2005 Approved Nissan Maxima 2005 atc
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J AIR CONDITIONER
A
B
SECTION
AUTOMATIC AIR CONDITIONER C
D
E
CONTENTS
PRECAUTIONS ......................................................... 4
. Description of 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) .................................... 23 .
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 . OUTLET DOOR CONTROL ............................... 23 .
FEATURES OF NEW TYPE REFRIGERANT MAGNET CLUTCH CONTROL .......................... 23 . I
CONNECTION ..................................................... 6. SELF-DIAGNOSTIC SYSTEM ........................... 23 .
O-RING AND REFRIGERANT CONNECTION..... 7 Description of Control System ............................... 24 .
Precautions for Servicing Compressor .................... 9 . Control Operation .................................................. 25
. ATC
Precautions for Service Equipment ......................... 9 . DISPLAY SCREEN ............................................. 25 .
RECOVERY/RECYCLING EQUIPMENT ............. 9 . AUTO SWITCH .................................................. 25.
ELECTRONIC LEAK DETECTOR ....................... 9 . TEMPERATURE SWITCH (TEMPERATURE
K
VACUUM PUMP ................................................ 10 . CONTROL) (DRIVER SIDE) .............................. 25 .
MANIFOLD GAUGE SET ................................... 10 . TEMPERATURE SWITCH (TEMPERATURE
SERVICE HOSES .............................................. 10 . CONTROL) (PASSENGER SIDE) ...................... 25 .
SERVICE COUPLERS ........................................11 . RECIRCULATION (REC) SWITCH .................... 25 . L
REFRIGERANT WEIGHT SCALE ......................11 . FRESH (FRE) SWITCH ..................................... 25 .
CHARGING CYLINDER ......................................11 . DEFROSTER (DEF) SWITCH ............................ 25 .
Wiring Diagrams and Trouble Diagnosis ................11 . REAR WINDOW DEFOGGER SWITCH ............ 26 . M
PREPARATION ........................................................ 12
. OFF SWITCH ..................................................... 26
.
Special Service Tools ............................................ 12
. A/C SWITCH ...................................................... 26
.
HFC-134a (R-134a) Service Tools and Equipment 12 ... MODE SWITCH ................................................. 26 .
Commercial Service Tools ..................................... 15 . FAN CONTROL SWITCH ................................... 26 .
REFRIGERATION SYSTEM .................................... 16 . DUAL SWITCH (WITH LEFT AND RIGHT VEN-
Refrigerant Cycle .................................................. 16
. TILATION TEMPERATURE SEPARATE CON-
REFRIGERANT FLOW ...................................... 16 . TROL SYSTEM) ................................................. 26.
Refrigerant System Protection .............................. 16 . Fail-safe Function .................................................. 26
.
REFRIGERANT PRESSURE SENSOR ............ 16 . Discharge Air Flow ................................................ 27
.
PRESSURE RELIEF VALVE ............................. 16 . System Description ................................................ 28
.
Component Layout ................................................ 17. SWITCHES AND THEIR CONTROL FUNCTION 28 ...
LUBRICANT ............................................................ 18
. CAN Communication System Description ............. 29 .
Maintenance of Lubricant Quantity in Compressor 18 ... TROUBLE DIAGNOSIS ........................................... 30 .
LUBRICANT ....................................................... 18
. CONSULT-II Function (BCM) ................................ 30 .
CHECKING AND ADJUSTING .......................... 18 . CONSULT-II BASIC OPERATION ...................... 30 .
AIR CONDITIONER CONTROL .............................. 21 . DATA MONITOR ................................................ 31 .
Revision: July 2005 ATC-1 2005 Maxima
How to Perform Trouble Diagnosis for Quick and DIAGNOSTIC PROCEDURE FOR INTAKE
Accurate Repair ..................................................... 32
. DOOR MOTOR ...................................................67 .
WORK FLOW ..................................................... 32 . Blower Motor Circuit ...............................................68 .
SYMPTOM TABLE ............................................. 32 . INSPECTION FLOW ...........................................68 .
Component Parts and Harness Connector Location 33 ... SYSTEM DESCRIPTION ....................................69 .
ENGINE COMPARTMENT ................................. 33 . COMPONENT DESCRIPTION ...........................70 .
PASSENGER COMPARTMENT ......................... 34 . DIAGNOSTIC PROCEDURE FOR BLOWER
Schematic .............................................................. 35
. MOTOR ...............................................................70.
Wiring Diagram -- A/C,A -- .................................. 36 . COMPONENT INSPECTION ..............................73 .
Unified Meter and A/C Amp. Terminals and Refer- Magnet Clutch Circuit .............................................74 .
ence Value ............................................................. 40
. INSPECTION FLOW ...........................................74 .
PIN CONNECTOR TERMINAL LAYOUT ........... 40 . SYSTEM DESCRIPTION ....................................75 .
TERMINALS AND REFERENCE VALUE FOR DIAGNOSTIC PROCEDURE FOR MAGNET
UNIFIED METER AND A/C AMP. ...................... 40 . CLUTCH .............................................................75 .
A/C System Self-diagnosis Function ..................... 42 . COMPONENT INSPECTION ..............................79 .
DESCRIPTION ................................................... 42 . Insufficient Cooling .................................................80 .
FUNCTION CONFIRMATION PROCEDURE ..... 43 . INSPECTION FLOW ...........................................80 .
AUXILIARY MECHANISM: TEMPERATURE PERFORMANCE TEST DIAGNOSES ...............81 .
SETTING TRIMMER .......................................... 48 . PERFORMANCE CHART ...................................83 .
AUXILIARY MECHANISM: FOOT POSITION TROUBLE DIAGNOSES FOR UNUSUAL PRES-
SETTING TRIMMER .......................................... 49 . SURE ..................................................................84
.
AUXILIARY MECHANISM: INLET PORT MEM- Insufficient Heating ................................................87 .
ORY FUNCTION ................................................ 49 . INSPECTION FLOW ...........................................87 .
Operational Check ................................................. 50 . Noise ......................................................................88
.
CHECKING MEMORY FUNCTION .................... 50 . INSPECTION FLOW ...........................................88 .
CHECKING BLOWER ........................................ 50 . Self-diagnosis ........................................................89.
CHECKING DISCHARGE AIR ........................... 50 . INSPECTION FLOW ...........................................89 .
CHECKING RECIRCULATION ........................... 51 . Memory Function ...................................................90 .
CHECKING TEMPERATURE DECREASE ........ 51 . INSPECTION FLOW ...........................................90 .
CHECKING TEMPERATURE INCREASE ......... 51 . Ambient Sensor Circuit ..........................................91 .
CHECK A/C SWITCH ......................................... 51 . COMPONENT DESCRIPTION ...........................91 .
CHECKING AUTO MODE .................................. 52 . AMBIENT TEMPERATURE INPUT PROCESS ...91
Power Supply and Ground Circuit for Unified Meter DIAGNOSTIC PROCEDURE FOR AMBIENT
and A/C Amp. ........................................................ 52
. SENSOR .............................................................91 .
INSPECTION FLOW .......................................... 52 . COMPONENT INSPECTION ..............................93 .
COMPONENT DESCRIPTION ........................... 53 . In-vehicle Sensor Circuit ........................................94 .
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 53 ... COMPONENT DESCRIPTION ...........................94 .
LAN System Circuit ............................................... 55 . DIAGNOSTIC PROCEDURE FOR IN-VEHICLE
DIAGNOSTIC PROCEDURE FOR LAN CIR- SENSOR .............................................................95 .
CUIT ................................................................... 55
. COMPONENT INSPECTION ..............................96 .
Mode Door Motor Circuit ....................................... 59 . Sunload Sensor Circuit ..........................................97 .
INSPECTION FLOW .......................................... 59 . COMPONENT DESCRIPTION ...........................97 .
SYSTEM DESCRIPTION ................................... 60 . SUNLOAD INPUT PROCESS ............................97 .
COMPONENT DESCRIPTION ........................... 61 . DIAGNOSTIC PROCEDURE FOR SUNLOAD
DIAGNOSTIC PROCEDURE FOR MODE SENSOR .............................................................97 .
DOOR MOTOR .................................................. 61 . COMPONENT INSPECTION ..............................99 .
Air Mix Door Motor Circuit ..................................... 62 . Intake Sensor Circuit ............................................ 100 .
INSPECTION FLOW .......................................... 62 . COMPONENT DESCRIPTION ......................... 100 .
SYSTEM DESCRIPTION ................................... 63 . DIAGNOSTIC PROCEDURE FOR INTAKE SEN-
COMPONENT DESCRIPTION ........................... 64 . SOR .................................................................. 100
.
DIAGNOSTIC PROCEDURE FOR AIR MIX COMPONENT INSPECTION ............................ 101 .
DOOR ................................................................. 64
. UNIFIED METER AND A/C AMP. ........................... 102 .
Air Mix Door Motor PBR Circuit ............................. 64 . Removal and Installation ...................................... 102 .
DIAGNOSTIC PROCEDURE FOR AIR MIX REMOVAL ......................................................... 102 .
DOOR PBR ........................................................ 64 . INSTALLATION ................................................. 102 .
Intake Door Motor Circuit ....................................... 65 . AMBIENT SENSOR ............................................... 103 .
INSPECTION FLOW .......................................... 65 . Removal and Installation ...................................... 103 .
SYSTEM DESCRIPTION ................................... 66 . REMOVAL ......................................................... 103 .
COMPONENT DESCRIPTION ........................... 67 . INSTALLATION ................................................. 103 .
Revision: July 2005 ATC-2 2005 Maxima
IN-VEHICLE SENSOR ........................................... 104 . REFRIGERANT LINES .......................................... 119 .
Removal and Installation ..................................... 104
. HFC-134a (R-134a) Service Procedure .............. 119 . A
REMOVAL ........................................................ 104
. SETTING OF SERVICE TOOLS AND EQUIP-
INSTALLATION ................................................ 104
. MENT ............................................................... 119
.
SUNLOAD SENSOR ............................................. 105 . Components ........................................................ 121 . B
Removal and Installation ..................................... 105
. Removal and Installation for Compressor ........... 122 .
REMOVAL ........................................................ 105
. REMOVAL ........................................................ 122 .
INSTALLATION ................................................ 105
. INSTALLATION ................................................ 122 .
INTAKE SENSOR .................................................. 106
. Removal and Installation for Compressor Clutch . 122 C
Removal and Installation ..................................... 106
. REMOVAL ........................................................ 122 .
REMOVAL ........................................................ 106
. INSPECTION AFTER REMOVAL .................... 124 .
INSTALLATION ................................................ 106
. INSTALLATION ................................................ 124 . D
BLOWER UNIT ...................................................... 107
. INSPECTION AFTER INSTALLATION ............. 125 .
Removal and Installation ..................................... 107
. BREAK-IN OPERATION ................................... 125 .
REMOVAL ........................................................ 107
. Removal and Installation for Low-pressure Flexible E
INSTALLATION ................................................ 107
. Hose .................................................................... 125
.
BLOWER MOTOR ................................................. 108 . REMOVAL ........................................................ 125 .
Removal and Installation ..................................... 108
. INSTALLATION ................................................ 125 .
REMOVAL ........................................................ 108
. Removal and Installation for High-pressure Flexible F
INSTALLATION ................................................ 108
. Hose .................................................................... 126
.
INTAKE DOOR MOTOR ........................................ 109 . REMOVAL ........................................................ 126 .
Removal and Installation ..................................... 109
. INSTALLATION ................................................ 126 . G
REMOVAL ........................................................ 109
. Removal and Installation for High-pressure Pipe . 126
INSTALLATION ................................................ 109
. REMOVAL ........................................................ 126 .
IN-CABIN MICROFILTER .......................................110 . INSTALLATION ................................................ 126 . H
Removal and Installation ......................................110
. Removal and Installation for Refrigerant Pressure
FUNCTION ........................................................110
. Sensor ................................................................. 126
.
REPLACEMENT TIMING ..................................110 . REMOVAL ........................................................ 126 .
I
REPLACEMENT PROCEDURES .....................110 . INSTALLATION ................................................ 127 .
HEATER & COOLING UNIT ASSEMBLY .............. 111 . Removal and Installation for Condenser ............. 127 .
Removal and Installation ...................................... 111
. REMOVAL ........................................................ 127 .
REMOVAL ......................................................... 111
. INSTALLATION ................................................ 127 . ATC
INSTALLATION ................................................. 111
. Removal and Installation for Evaporator ............. 127 .
HEATER CORE ......................................................112
. REMOVAL ........................................................ 127 .
Removal and Installation ......................................112
. INSTALLATION ................................................ 128 . K
REMOVAL .........................................................112
. Removal and Installation for Expansion Valve ..... 129 .
INSTALLATION .................................................112
. REMOVAL ........................................................ 129 .
MODE DOOR MOTOR ...........................................113 . INSTALLATION ................................................ 129 . L
Removal and Installation ......................................113
. Checking for Refrigerant Leaks ........................... 129 .
REMOVAL .........................................................113
. Checking System for Leaks Using the Fluorescent
INSTALLATION .................................................113
. Leak Detector ...................................................... 129.
AIR MIX DOOR MOTOR .........................................114 . Dye Injection ........................................................ 130
. M
Removal and Installation ......................................114
. Electronic Refrigerant Leak Detector ................... 130 .
DRIVER SIDE AIR MIX DOOR MOTOR ...........114 . PRECAUTIONS FOR HANDLING LEAK
PASSENGER SIDE AIR MIX DOOR MOTOR ..114 DETECTOR ...................................................... 130 .
FAN CONTROL AMPLIFIER ..................................115 . CHECKING PROCEDURE .............................. 131 .
Removal and Installation ......................................115
. SERVICE DATA AND SPECIFICATIONS (SDS) ... 133 .
REMOVAL .........................................................115
. Service Data and Specifications (SDS) ............... 133 .
INSTALLATION .................................................115
. COMPRESSOR ............................................... 133 .
DUCTS AND GRILLES ..........................................116 . LUBRICANT ..................................................... 133 .
Removal and Installation ......................................116
. REFRIGERANT ................................................ 133 .
CENTER VENTILATOR GRILLE ......................116 . ENGINE IDLING SPEED ................................. 133 .
SIDE VENTILATOR GRILLE LH .......................116 . BELT TENSION ................................................ 133 .
SIDE VENTILATOR GRILLE RH .......................117 .
FLOOR DUCT ...................................................117
.
Revision: July 2005 ATC-3 2005 Maxima
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS002TV
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) EJS002TW
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 recov-
ery/recycling 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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