Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti Q45 FY33 F50 2001-2006 Approved 2006_Q45 atc
<< Back | HomeMost service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.
Image preview - the first page of the document
>> Download atc documenatation <<
Text preview - extract from the document
AUTOMATIC AIR CONDITIONER
J AIR CONDITIONER
A
SECTION
AUTOMATIC AIR CONDITIONER
ATC B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 5
. LUBRICANT ............................................................. 23
. F
Precautions for Supplemental Restraint System Maintenance of Lubricant Quantity in Compressor 23 ...
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- LUBRICANT ....................................................... 23
.
SIONER" ................................................................. 5
. LUBRICANT RETURN OPERATION ................. 23 . G
Precautions for Working with HFC-134a (R-134a) 5 ..... LUBRICANT ADJUSTING PROCEDURE FOR
CONTAMINATED REFRIGERANT ...................... 6 . COMPONENTS REPLACEMENT EXCEPT
General Refrigerant Precautions ............................. 6 . COMPRESSOR ................................................. 24 .
H
Precautions for Refrigerant Connection .................. 6 . LUBRICANT ADJUSTING PROCEDURE FOR
FEATURES OF NEW TYPE REFRIGERANT COMPRESSOR REPLACEMENT ...................... 24 .
CONNECTION ..................................................... 6. AIR CONDITIONER CONTROL .............................. 26 .
O-RING AND REFRIGERANT CONNECTION..... 7 Description of Air Conditioner LAN Control System 26 ... I
Precautions for Servicing Compressor .................... 9 . System Construction ............................................. 26
.
Precautions for Service Equipment ......................... 9 . OPERATION ....................................................... 27
.
RECOVERY/RECYCLING EQUIPMENT ............. 9 . TRANSMISSION DATA AND TRANSMISSION ATC
ELECTRONIC LEAK DETECTOR ....................... 9 . ORDER .............................................................. 27
.
VACUUM PUMP ................................................ 10 . AIR MIX DOOR CONTROL (AUTOMATIC TEM-
MANIFOLD GAUGE SET ................................... 10 . PERATURE CONTROL) .................................... 28 .
K
SERVICE HOSES .............................................. 10 . FAN SPEED CONTROL ..................................... 28 .
SERVICE COUPLERS ........................................11 . INTAKE DOOR CONTROL ................................ 28 .
REFRIGERANT WEIGHT SCALE ......................11 . MODE DOOR CONTROL .................................. 28 .
CHARGING CYLINDER ......................................11 . MAGNET CLUTCH CONTROL .......................... 29 . L
Precautions for Leak Detection Dye ...................... 12 . SELF-DIAGNOSIS SYSTEM ............................. 29 .
IDENTIFICATION ............................................... 12 . Description of Control System ............................... 30 .
IDENTIFICATION LABEL FOR VEHICLE .......... 12 . Control Operation .................................................. 31
. M
PREPARATION ........................................................ 13
. DISPLAY SCREEN ............................................. 31 .
Special Service Tools ............................................ 13
. AUTO SWITCH (DRIVER SIDE) ........................ 31 .
HFC-134a (R-134a) Service Tools and Equipment 14 ... AUTO SWITCH (PASSENGER SIDE) ............... 31 .
Commercial Service Tools ..................................... 16 . TEMPERATURE DIAL (POTENTIO TEMPERA-
REFRIGERATION SYSTEM .................................... 17 . TURE CONTROL) (DRIVER SIDE) .................... 31 .
Refrigerant Cycle .................................................. 17
. TEMPERATURE DIAL (POTENTIO TEMPERA-
REFRIGERANT FLOW ...................................... 17 . TURE CONTROL) (PASSENGER SIDE) ........... 31 .
FREEZE PROTECTION .................................... 17 . INTAKE SWITCH ................................................ 32.
Refrigerant System Protection .............................. 17 . DEFROSTER (DEF) SWITCH ............................ 32 .
REFRIGERANT PRESSURE SENSOR ............ 17 . OFF SWITCH ..................................................... 32
.
PRESSURE RELIEF VALVE .............................. 17 . MODE SWITCH (DRIVER SIDE) ....................... 32 .
V-6 Variable Displacement Compressor ................ 18 . MODE SWITCH (PASSENGER SIDE) ............... 32 .
GENERAL INFORMATION ................................ 18 . ECON (ECONOMY) SWITCH ............................ 32 .
DESCRIPTION ................................................... 19. FAN SWITCH ..................................................... 32
.
Component Layout ................................................ 22. DUAL SWITCH ................................................... 32
.
REAR CONTROL SWITCH ................................ 32 .
Revision: 2005 November ATC-1 2006 Q45
Fail-Safe Function ................................................. 32
. Rear Ventilator Door Motor Circuit .........................79 .
Discharge Air Flow ................................................ 33
. COMPONENT DESCRIPTION ...........................79 .
System Description ................................................ 34
. DIAGNOSIS PROCEDURE FOR REAR VENTI-
SWITCHES AND THEIR CONTROL FUNCTION 34 ... LATOR DOOR MOTOR ......................................79 .
TROUBLE DIAGNOSIS ........................................... 35 . Rear Control Switch Circuit ....................................80 .
How to Perform Trouble Diagnosis for Quick and DIAGNOSIS PROCEDURE FOR REAR CON-
Accurate Repair ..................................................... 35
. TROL SWITCH ...................................................80 .
WORK FLOW ..................................................... 35 . Rear Control Cancel Switch ...................................80 .
SYMPTOM TABLE ............................................. 35 . DIAGNOSIS PROCEDURE FOR REAR CON-
Component Parts and Harness Connector Location 37 ... TROL CANCEL SWITCH ....................................80 .
ENGINE COMPARTMENT ................................. 37 . Blower Motor Circuit ...............................................81 .
PASSENGER COMPARTMENT ......................... 38 . INSPECTION FLOW ...........................................81 .
Schematic .............................................................. 39
. SYSTEM DESCRIPTION ....................................81 .
Wiring Diagram -- A/C -- ...................................... 40 . COMPONENT DESCRIPTION ...........................83 .
Auto Amp. Terminals and Reference Value ........... 50 . DIAGNOSIS PROCEDURE FOR BLOWER
PIN CONNECTOR TERMINAL LAYOUT ........... 50 . MOTOR ...............................................................83.
TERMINALS AND REFERENCE VALUE FOR COMPONENT INSPECTION ..............................85 .
AUTO AMP. ........................................................ 50
. Magnet Clutch Circuit .............................................86 .
Self-diagnosis Function ......................................... 53 . INSPECTION FLOW ...........................................86 .
DESCRIPTION ................................................... 53 . SYSTEM DESCRIPTION ....................................87 .
FUNCTION CONFIRMATION PROCEDURE ..... 54 . DIAGNOSIS PROCEDURE FOR MAGNET
AUXILIARY MECHANISM: TEMPERATURE CLUTCH .............................................................87 .
SETTING TRIMMER .......................................... 61 . COMPONENT INSPECTION ..............................92 .
Operational Check ................................................. 62
. Insufficient Cooling .................................................93 .
CHECKING MEMORY FUNCTION .................... 62 . INSPECTION FLOW ...........................................93 .
CHECKING BLOWER ........................................ 62 . PERFORMANCE TEST DIAGNOSIS .................95 .
CHECKING DISCHARGE AIR ........................... 62 . PERFORMANCE CHART ...................................97 .
CHECKING INTAKE AIR (INTAKE SWITCH) ..... 63 . TROUBLE DIAGNOSIS FOR UNUSUAL PRES-
CHECKING TEMPERATURE DECREASE ........ 63 . SURE ..................................................................98
.
CHECKING TEMPERATURE INCREASE ......... 63 . DIAGNOSIS PROCEDURE FOR INSUFFI-
CHECK ECON (ECONOMY) MODE .................. 63 . CIENT COOLING .............................................. 100 .
CHECKING AUTO MODE .................................. 63 . Insufficient Heating .............................................. 102 .
Power Supply and Ground Circuit for Auto Amp. ... 64 INSPECTION FLOW ......................................... 102 .
INSPECTION FLOW .......................................... 64 . Noise .................................................................... 103
.
COMPONENT DESCRIPTION ........................... 64 . INSPECTION FLOW ......................................... 103 .
DIAGNOSIS PROCEDURE FOR A/C SYSTEM... 65 Self-Diagnosis ...................................................... 104.
LAN System Circuit ............................................... 66. INSPECTION FLOW ......................................... 104 .
DIAGNOSIS PROCEDURE FOR LAN CIRCUIT 66 ... Memory Function ................................................. 105 .
Mode Door Motor Circuit ....................................... 70 . INSPECTION FLOW ......................................... 105 .
INSPECTION FLOW .......................................... 70 . ECON (ECONOMY) MODE ................................. 106 .
SYSTEM DESCRIPTION ................................... 71 . INSPECTION FLOW ......................................... 106 .
COMPONENT DESCRIPTION ........................... 72 . A/C Display is Malfunctioning .............................. 107 .
DIAGNOSIS PROCEDURE FOR MODE DOOR DIAGNOSIS PROCEDURE .............................. 107 .
MOTOR .............................................................. 72
. A/C Operation is Malfunctioning .......................... 108 .
Air Mix Door Motor Circuit ..................................... 73 . DIAGNOSIS PROCEDURE .............................. 108 .
INSPECTION FLOW .......................................... 73 . Ambient Sensor Circuit ........................................ 110 .
SYSTEM DESCRIPTION ................................... 74 . COMPONENT DESCRIPTION ......................... 110 .
COMPONENT DESCRIPTION ........................... 75 . AMBIENT TEMPERATURE INPUT PROCESS . 110
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR DIAGNOSIS PROCEDURE FOR AMBIENT
MOTOR .............................................................. 75
. SENSOR ........................................................... 110 .
Air Mix Door Motor PBR Circuit ............................. 75 . COMPONENT INSPECTION ............................ 112 .
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR In-Vehicle Sensor Circuit ...................................... 112 .
MOTOR PBR ...................................................... 75. COMPONENT DESCRIPTION ......................... 112 .
Intake Door Motor Circuit ....................................... 76 . DIAGNOSIS PROCEDURE FOR IN-VEHICLE
INSPECTION FLOW .......................................... 76 . SENSOR ........................................................... 113 .
SYSTEM DESCRIPTION ................................... 77 . COMPONENT INSPECTION ............................ 114 .
COMPONENT DESCRIPTION ........................... 78 . Sunload Sensor Circuit ........................................ 115 .
DIAGNOSIS PROCEDURE FOR INTAKE DOOR COMPONENT DESCRIPTION ......................... 115 .
MOTOR .............................................................. 78
. SUNLOAD INPUT PROCESS .......................... 115 .
Revision: 2005 November ATC-2 2006 Q45
DIAGNOSIS PROCEDURE FOR SUNLOAD IN-CABIN MICROFILTER ...................................... 134 .
SENSOR ...........................................................115 . Removal and Installation ..................................... 134 . A
COMPONENT INSPECTION ............................117 . FUNCTION ....................................................... 134 .
Intake Sensor Circuit ............................................118 . REPLACEMENT TIMING ................................. 134 .
COMPONENT DESCRIPTION .........................118 . REPLACEMENT PROCEDURES .................... 134 . B
DIAGNOSIS PROCEDURE FOR INTAKE SEN- HEATER & COOLING UNIT ASSEMBLY .............. 135 .
SOR ..................................................................118
. Removal and Installation ..................................... 135 .
COMPONENT INSPECTION ............................119 . REMOVAL ........................................................ 135 .
Multiplex Communication Circuit ......................... 120 . INSTALLATION ................................................ 136 . C
DIAGNOSIS PROCEDURE FOR MULTIPLEX Disassembly and Assembly ................................. 137 .
COMMUNICATION CIRCUIT (FRONT CON- HEATER CORE ...................................................... 139 .
TROLLER) ....................................................... 120 . Removal and Installation ..................................... 139 . D
DIAGNOSIS PROCEDURE FOR MULTIPLEX REMOVAL ........................................................ 139 .
COMMUNICATION CIRCUIT (REAR CONTROL INSTALLATION ................................................ 139 .
SWITCH) .......................................................... 123. MODE DOOR MOTOR ........................................... 140 . E
CONTROLLER ...................................................... 125 . Removal and Installation ..................................... 140 .
Removal and Installation of Multifunction Switch . 125 REMOVAL ........................................................ 140 .
REMOVAL ........................................................ 125 . INSTALLATION ................................................ 140 .
INSTALLATION ................................................ 125 . AIR MIX DOOR MOTOR ........................................ 141 . F
Removal and Installation of Rear Control Switch . 125 Removal and Installation ..................................... 141 .
REMOVAL ........................................................ 125 . REMOVAL ........................................................ 141 .
INSTALLATION ................................................ 125 . INSTALLATION ................................................ 141 . G
Removal and Installation of Rear Control Cancel REAR VENTILATOR DOOR MOTOR .................... 142 .
Switch .................................................................. 125
. Removal and Installation ..................................... 142 .
REMOVAL ........................................................ 125 . REMOVAL ........................................................ 142 . H
INSTALLATION ................................................ 125 . INSTALLATION ................................................ 142 .
AMBIENT SENSOR ............................................... 126 . DUCTS AND GRILLES .......................................... 143 .
Removal and Installation ..................................... 126 . Removal and Installation ..................................... 143 .
I
REMOVAL ........................................................ 126 . REMOVAL ........................................................ 143 .
INSTALLATION ................................................ 126 . INSTALLATION ................................................ 145 .
IN-VEHICLE SENSOR ........................................... 127 . REFRIGERANT LINES .......................................... 146 .
Removal and Installation ..................................... 127 . HFC-134a (R-134a) Service Procedure .............. 146 . ATC
REMOVAL ........................................................ 127 . SETTING OF SERVICE TOOLS AND EQUIP-
INSTALLATION ................................................ 127 . MENT ............................................................... 146
.
SUNLOAD SENSOR ............................................. 128 . Components ........................................................ 148 . K
Removal and Installation ..................................... 128 . Removal and Installation of Compressor ............. 149 .
REMOVAL ........................................................ 128 . REMOVAL ........................................................ 149 .
INSTALLATION ................................................ 128 . INSTALLATION ................................................ 150 . L
INTAKE SENSOR .................................................. 129 . Removal and Installation of Compressor Clutch . 150
Removal and Installation ..................................... 129 . REMOVAL ........................................................ 150 .
REMOVAL ........................................................ 129 . INSTALLATION ................................................ 152 .
INSTALLATION ................................................ 129 . Removal and Installation of Low-Pressure Flexible M
BLOWER UNIT ...................................................... 130 . Hose and Pipe ..................................................... 153 .
Removal and Installation ..................................... 130 . REMOVAL ........................................................ 153 .
REMOVAL ........................................................ 130 . INSTALLATION ................................................ 154 .
INSTALLATION ................................................ 130 . Removal and Installation of High-Pressure Flexible
Disassembly and Assembly ................................ 131 . Hose .................................................................... 154
.
BLOWER MOTOR ................................................. 132 . REMOVAL ........................................................ 154 .
Removal and Installation ..................................... 132 . INSTALLATION ................................................ 155 .
REMOVAL ........................................................ 132 . Removal and Installation of High-Pressure Pipe . 155
INSTALLATION ................................................ 132 . REMOVAL ........................................................ 155 .
INTAKE DOOR MOTOR ........................................ 133 . INSTALLATION ................................................ 156 .
Removal and Installation ..................................... 133 . Removal and Installation of Refrigerant Pressure
REMOVAL ........................................................ 133 . Sensor ................................................................. 156
.
INSTALLATION ................................................ 133 . REMOVAL ........................................................ 156 .
INSTALLATION ................................................ 156 .
Removal and Installation of Condenser ............... 157 .
REMOVAL ........................................................ 157 .
INSTALLATION ................................................ 157 .
Revision: 2005 November ATC-3 2006 Q45
Removal and Installation of Liquid Tank .............. 158 . Dye Injection ........................................................ 161
.
REMOVAL ........................................................ 158
. Electronic Refrigerant Leak Detector ................... 162 .
INSTALLATION ................................................. 158
. PRECAUTIONS FOR HANDLING LEAK
Removal and Installation of Evaporator ............... 159 . DETECTOR ...................................................... 162 .
REMOVAL ........................................................ 159
. CHECKING PROCEDURE ............................... 163 .
INSTALLATION ................................................. 159
. SERVICE DATA AND SPECIFICATIONS (SDS) ... 165 .
Removal and Installation of Expansion Valve ...... 159 . Compressor ......................................................... 165
.
REMOVAL ........................................................ 159
. Lubricant .............................................................. 165
.
INSTALLATION ................................................. 160
. Refrigerant ........................................................... 165
.
Checking for Refrigerant Leaks ........................... 161 . Engine Idling Speed ............................................. 165 .
Checking System for Leaks Using the Fluorescent Belt Tension ......................................................... 165
.
Leak Detector ...................................................... 161
.
Revision: 2005 November ATC-4 2006 Q45
PRECAUTIONS
PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" NJS0007I
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. 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 C
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: D
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. E
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. F
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.
G
Precautions for Working with HFC-134a (R-134a) NJS0007J
CAUTION:
q CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants H
are mixed and compressor malfunction is likely to occur, refer to "CONTAMINATED REFRIGER-
ANT" below. To determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use
Refrigerant Recovery/Recycling Recharging equipment and refrigerant identifier. I
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 malfunction is likely to occur.
q The specified HFC-134a (R-134a) lubricant rapidly absorbs moisture from the atmosphere. The fol- ATC
lowing handling precautions must be observed:
◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo