Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti QX56 JA60 2004-2005 Approved 2005_QX56 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
J AIR CONDITIONER
A
SECTION
AUTOMATIC AIR CONDITIONER
ATC B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 5
. LUBRICANT ............................................................. 22
. F
Precautions for Supplemental Restraint System Maintenance of Lubricant Quantity in Compressor 22 ...
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- LUBRICANT ....................................................... 22.
SIONER" ................................................................. 5
. CHECKING AND ADJUSTING ........................... 22 . G
Precautions for Working with HFC-134a (R-134a) 5 ..... AIR CONDITIONER CONTROL .............................. 24 .
Contaminated Refrigerant ....................................... 5 . Description ............................................................. 24
.
General Refrigerant Precautions ............................. 6 . Operation ............................................................... 24
.
H
Precautions for Leak Detection Dye ........................ 6 . AIR MIX DOORS CONTROL ............................. 24 .
A/C Identification Label ........................................... 7
. BLOWER SPEED CONTROL ............................ 24 .
Precautions for Refrigerant Connection .................. 7 . INTAKE DOOR CONTROL ................................ 24 .
FEATURES OF NEW TYPE REFRIGERANT MODE DOOR CONTROL .................................. 24 . I
CONNECTION ..................................................... 7. DEFROSTER DOOR CONTROL ....................... 24 .
O-RING AND REFRIGERANT CONNECTION ..... 8 MAGNET CLUTCH CONTROL .......................... 25 .
Precautions for Servicing Compressor ...................11 . SELF-DIAGNOSTIC SYSTEM ........................... 25 . ATC
Precautions for Service Equipment ........................11 . Description of Control System ............................... 26 .
RECOVERY/RECYCLING EQUIPMENT ............11 . Control Operation .................................................. 26
.
ELECTRONIC LEAK DETECTOR ......................11 . DISPLAY SCREEN ............................................. 27 .
K
VACUUM PUMP ................................................ 12 . AUTO SWITCH .................................................. 27 .
MANIFOLD GAUGE SET ................................... 12 . TEMPERATURE CONTROL DIAL (TEMPERA-
SERVICE HOSES .............................................. 12 . TURE CONTROL) (DRIVER SIDE) .................... 27 .
SERVICE COUPLERS ....................................... 13 . TEMPERATURE CONTROL DIAL (TEMPERA- L
REFRIGERANT WEIGHT SCALE ..................... 13 . TURE CONTROL) (PASSENGER SIDE) ........... 27 .
CHARGING CYLINDER ..................................... 13 . TEMPERATURE CONTROL DIAL (TEMPERA-
Wiring Diagrams and Trouble Diagnosis ............... 13 . TURE AND MODE CONTROL) (REAR) ............ 27 . M
PREPARATION ........................................................ 14
. RECIRCULATION () SWITCH ............................ 27 .
Special Service Tools ............................................ 14
. DEFROSTER () SWITCH ................................... 27 .
HFC-134a (R-134a) Service Tools and Equipment 14 ... REAR WINDOW DEFOGGER SWITCH ............ 27 .
Commercial Service Tools ..................................... 17 . OFF SWITCH ..................................................... 27 .
REFRIGERATION SYSTEM .................................... 18 . A/C SWITCH ...................................................... 27.
Refrigerant Cycle .................................................. 18
. MODE SWITCH (FRONT) .................................. 27 .
REFRIGERANT FLOW ...................................... 18 . FRONT BLOWER CONTROL DIAL ................... 27 .
Refrigerant System Protection .............................. 18 . TEMPERATURE CONTROL DIAL (TEMPERA-
REFRIGERANT PRESSURE SENSOR ............ 18 . TURE AND MODE CONTROL) .......................... 28 .
PRESSURE RELIEF VALVE ............................. 19 . REAR BLOWER CONTROL DIAL ..................... 28 .
Component Layout ................................................ 20. Discharge Air Flow ................................................ 29.
FRONT REFRIGERATION SYSTEM ................. 20 . FRONT ............................................................... 29
.
REAR REFRIGERATION SYSTEM ................... 21 . REAR ................................................................. 29
.
System Description (Front) .................................... 30 .
SWITCHES AND THEIR CONTROL FUNCTION 30 ...
System Description (Rear) .................................... 31 .
Revision: October 2005 ATC-1 2005 QX56
SWITCHES AND THEIR CONTROL FUNCTION 31 ... DOOR MOTOR (REAR) .....................................79 .
CAN Communication System Description ............. 32 . Intake Door Motor Circuit .......................................83 .
TROUBLE DIAGNOSIS ........................................... 33 . INSPECTION FLOW ...........................................83 .
CONSULT-II Function (HVAC) ............................... 33 . SYSTEM DESCRIPTION ....................................84 .
CONSULT-II BASIC OPERATION ...................... 33 . COMPONENT DESCRIPTION ...........................85 .
SELF-DIAGNOSIS ............................................. 34 . DIAGNOSTIC PROCEDURE FOR INTAKE
DATA MONITOR ................................................. 34 . DOOR MOTOR ...................................................85 .
CONSULT-II Function (BCM) ................................. 36 . Defroster Door Motor Circuit ..................................87 .
CONSULT-II BASIC OPERATION ...................... 36 . SYMPTOM: .........................................................87 .
DATA MONITOR ................................................. 37 . INSPECTION FLOW ...........................................87 .
How to Perform Trouble Diagnosis for Quick and SYSTEM DESCRIPTION ....................................88 .
Accurate Repair ..................................................... 38 . COMPONENT DESCRIPTION ...........................88 .
WORK FLOW ..................................................... 38 . DIAGNOSTIC PROCEDURE FOR
SYMPTOM TABLE ............................................. 38 . DEFROSTER DOOR MOTOR ............................89 .
Component Parts and Harness Connector Location 39 ... Front Blower Motor Circuit .....................................93 .
ENGINE COMPARTMENT ................................. 39 . INSPECTION FLOW ...........................................93 .
FRONT PASSENGER COMPARTMENT ........... 40 . SYSTEM DESCRIPTION ....................................94 .
REAR PASSENGER COMPARTMENT .............. 41 . COMPONENT DESCRIPTION ...........................95 .
Schematic .............................................................. 42 . DIAGNOSTIC PROCEDURE FOR BLOWER
Wiring Diagram -- A/C,A -- .................................. 43 . MOTOR ...............................................................95.
Front Air Control Terminals and Reference Value... 53 COMPONENT INSPECTION ............................ 100 .
PIN CONNECTOR TERMINAL LAYOUT ........... 53 . Rear Blower Motor Circuit .................................... 101 .
TERMINALS AND REFERENCE VALUE FOR INSPECTION FLOW ......................................... 101 .
FRONT AIR CONTROL ...................................... 53 . SYSTEM DESCRIPTION .................................. 102 .
A/C System Self-diagnosis Function ..................... 55 . DIAGNOSTIC PROCEDURE FOR REAR
DESCRIPTION ................................................... 55 . BLOWER MOTOR ............................................ 102 .
Operational Check (Front) ..................................... 57 . COMPONENT INSPECTION ............................ 110 .
CHECKING MEMORY FUNCTION .................... 57 . Rear Air Control Circuit ........................................ 112 .
CHECKING BLOWER ........................................ 57 . INSPECTION FLOW ......................................... 112 .
CHECKING DISCHARGE AIR ........................... 58 . SYSTEM DESCRIPTION .................................. 113 .
CHECKING RECIRCULATION ........................... 58 . DIAGNOSTIC PROCEDURE FOR REAR AIR
CHECKING TEMPERATURE DECREASE ........ 58 . CONTROL ........................................................ 113 .
CHECKING TEMPERATURE INCREASE ......... 59 . Magnet Clutch Circuit ........................................... 115 .
CHECK A/C SWITCH ......................................... 59 . INSPECTION FLOW ......................................... 115 .
CHECKING AUTO MODE .................................. 59 . SYSTEM DESCRIPTION .................................. 116 .
Operational Check (Rear) ...................................... 60 . DIAGNOSTIC PROCEDURE FOR MAGNET
CHECKING BLOWER ........................................ 60 . CLUTCH ........................................................... 116 .
CHECKING TEMPERATURE DECREASE ........ 60 . Insufficient Cooling ............................................... 121 .
CHECKING TEMPERATURE INCREASE ......... 60 . INSPECTION FLOW ......................................... 121 .
Power Supply and Ground Circuit for Front Air Con- PERFORMANCE TEST DIAGNOSES ............. 122 .
trol .......................................................................... 61
. PERFORMANCE CHART ................................. 124 .
INSPECTION FLOW .......................................... 61 . TROUBLE DIAGNOSES FOR UNUSUAL PRES-
COMPONENT DESCRIPTION ........................... 62 . SURE ................................................................ 125
.
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 62 ... Insufficient Heating .............................................. 128 .
Mode Door Motor Circuit ....................................... 64 . INSPECTION FLOW ......................................... 128 .
INSPECTION FLOW .......................................... 64 . Noise .................................................................... 129
.
SYSTEM DESCRIPTION ................................... 65 . INSPECTION FLOW ......................................... 130 .
COMPONENT DESCRIPTION ........................... 66 . Self-diagnosis ...................................................... 132.
DIAGNOSTIC PROCEDURE FOR MODE INSPECTION FLOW ......................................... 132 .
DOOR MOTOR .................................................. 66 . Memory Function ................................................. 133 .
Air Mix Door Motor Circuit ..................................... 70 . INSPECTION FLOW ......................................... 133 .
INSPECTION FLOW .......................................... 70 . Water Valve Circuit ............................................... 133 .
SYSTEM DESCRIPTION ................................... 71 . COMPONENT DESCRIPTION ......................... 133 .
COMPONENT DESCRIPTION ........................... 72 . DIAGNOSTIC PROCEDURE FOR WATER
DIAGNOSTIC PROCEDURE FOR AIR MIX VALVE ............................................................... 134
.
DOOR MOTOR (DRIVER) .................................. 72 . COMPONENT INSPECTION ............................ 136 .
DIAGNOSTIC PROCEDURE FOR AIR MIX Ambient Sensor Circuit ........................................ 137 .
DOOR MOTOR (PASSENGER) ......................... 76 . COMPONENT DESCRIPTION ......................... 137 .
DIAGNOSTIC PROCEDURE FOR AIR MIX AMBIENT TEMPERATURE INPUT PROCESS .137
Revision: October 2005 ATC-2 2005 QX56
DIAGNOSTIC PROCEDURE FOR AMBIENT Components ........................................................ 160 .
SENSOR .......................................................... 137 . Removal and Installation ..................................... 161 . A
COMPONENT INSPECTION ........................... 139 . FRONT HEATER CORE .................................. 161 .
In-vehicle Sensor Circuit ..................................... 140 . REAR HEATER CORE ..................................... 162 .
COMPONENT DESCRIPTION ........................ 140 . DEFROSTER DOOR MOTOR ............................... 163 . B
DIAGNOSTIC PROCEDURE FOR IN-VEHICLE Removal and Installation ..................................... 163 .
SENSOR .......................................................... 141 . REMOVAL ........................................................ 163 .
COMPONENT INSPECTION ........................... 143 . INSTALLATION ................................................ 163 .
Optical Sensor Circuit ......................................... 143 . INTAKE DOOR MOTOR ........................................ 164 . C
COMPONENT DESCRIPTION ........................ 143 . Removal and Installation ..................................... 164 .
OPTICAL INPUT PROCESS ........................... 143 . REMOVAL ........................................................ 164 .
DIAGNOSTIC PROCEDURE FOR OPTICAL INSTALLATION ................................................ 164 . D
SENSOR .......................................................... 144 . MODE DOOR MOTOR ........................................... 165 .
Intake Sensor Circuit ........................................... 145 . Removal and Installation ..................................... 165 .
COMPONENT DESCRIPTION ........................ 145 . REMOVAL ........................................................ 165 . E
DIAGNOSTIC PROCEDURE FOR INTAKE SEN- INSTALLATION ................................................ 165 .
SOR ................................................................. 145
. AIR MIX DOOR MOTOR ........................................ 166 .
COMPONENT INSPECTION ........................... 146 . Components ........................................................ 166 .
CONTROL UNIT .................................................... 147 . Removal and Installation ..................................... 166 . F
Removal and Installation ..................................... 147 . FRONT AIR MIX DOOR MOTOR (DRIVER) .... 166 .
FRONT AIR CONTROL ................................... 147 . FRONT AIR MIX DOOR MOTOR (PASSENGER) 167 .
REAR AIR CONTROL ...................................... 147 . REAR AIR MIX DOOR MOTOR ....................... 167 . G
AMBIENT SENSOR ............................................... 148 . VARIABLE BLOWER CONTROL .......................... 168 .
Removal and Installation ..................................... 148 . Removal and Installation ..................................... 168 .
REMOVAL ........................................................ 148 . REMOVAL ........................................................ 168 . H
INSTALLATION ................................................ 148 . INSTALLATION ................................................ 168 .
IN-VEHICLE SENSOR ........................................... 149 . REAR BLOWER MOTOR RESISTOR ................... 169 .
Removal and Installation ..................................... 149 . Removal and Installation ..................................... 169 .
I
REMOVAL ........................................................ 149 . REMOVAL ........................................................ 169 .
INSTALLATION ................................................ 149 . INSTALLATION ................................................ 169 .
OPTICAL SENSOR ............................................... 150 . DUCTS AND GRILLES .......................................... 170 .
Removal and Installation ..................................... 150 . Components ........................................................ 170 . ATC
INTAKE SENSOR .................................................. 151 . Removal and Installation ..................................... 173 .
Removal and Installation ..................................... 151 . CENTER CONSOLE HEAT DUCT AND REAR
REMOVAL ........................................................ 151 . FINISHER ASSEMBLY GRILLE ....................... 173 . K
INSTALLATION ................................................ 151 . DEFROSTER NOZZLE .................................... 173 .
BLOWER MOTOR ................................................. 152 . RH AND LH SIDE DEMISTER DUCT .............. 173 .
Components ........................................................ 152 . RH AND LH VENTILATOR DUCT .................... 173 .
L
Removal and Installation ..................................... 152 . CENTER VENTILATOR DUCT ........................ 173 .
FRONT BLOWER MOTOR .............................. 152 . FLOOR DUCT .................................................. 173 .
REAR BLOWER MOTOR ................................ 153 . REAR OVERHEAD DUCTS ............................. 173 .
IN-CABIN MICROFILTER ...................................... 154 . REAR FLOOR DUCT ....................................... 174 . M
Removal and Installation ..................................... 154 . GRILLES .......................................................... 174 .
FUNCTION ....................................................... 154 . REFRIGERANT LINES .......................................... 175 .
REPLACEMENT TIMING ................................. 154 . HFC-134a (R-134a) Service Procedure .............. 175 .
REPLACEMENT PROCEDURE ...................... 154 . SETTING OF SERVICE TOOLS AND EQUIP-
HEATER & COOLING UNIT ASSEMBLY ............. 156 . MENT ............................................................... 175
.
Components ........................................................ 156 . Components ........................................................ 177 .
Removal and Installation ..................................... 157 . Removal and Installation for Compressor ........... 179 .
FRONT HEATER AND COOLING UNIT ASSEM- REMOVAL ........................................................ 179 .
BLY ................................................................... 157
. INSTALLATION ................................................ 180 .
REAR HEATER AND COOLING UNIT ASSEM- Removal and Installation for Compressor Clutch . 180
BLY ................................................................... 158
. REMOVAL ........................................................ 180 .
Removal and Installation for Rear Heater Core INSPECTION ................................................... 181 .
Pipes ................................................................... 158
. INSTALLATION ................................................ 181 .
REMOVAL ........................................................ 158 . BREAK-IN OPERATION ................................... 183 .
INSTALLATION ................................................ 159 . Removal and Installation for Low-pressure Flexible
HEATER CORE ..................................................... 160 . Hose .................................................................... 183
.
REMOVAL ........................................................ 183 .
Revision: October 2005 ATC-3 2005 QX56
INSTALLATION ................................................. 183 . REMOVAL ......................................................... 186
.
Removal and Installation for High-pressure Flexible INSTALLATION ................................................. 187 .
Hose .................................................................... 183
. Removal and Installation for Rear Evaporator ..... 187 .
REMOVAL ........................................................ 183 . REMOVAL ......................................................... 188
.
INSTALLATION ................................................. 183 . INSTALLATION ................................................. 188 .
Removal and Installation for High-pressure Pipe . 183 Removal and Installation for Front Expansion Valve.188
REMOVAL ........................................................ 183 . REMOVAL ......................................................... 188
.
INSTALLATION ................................................. 183 . INSTALLATION ................................................. 188 .
Removal and Installation for Low-pressure Pipe . 184 Removal and Installation for Rear Expansion Valve.188
REMOVAL ........................................................ 184 . REMOVAL ......................................................... 188
.
INSTALLATION ................................................. 184 . INSTALLATION ................................................. 189 .
Removal and Installation for Underfloor Rear A/C Checking for Refrigerant Leaks ........................... 189 .
Pipes .................................................................... 184
. Checking System for Leaks Using the Fluorescent
REMOVAL ........................................................ 184 . Dye Leak Detector ............................................... 189.
INSTALLATION ................................................. 184 . Dye Injection ........................................................ 189
.
Removal and Installation for Rear A/C Pipes ...... 184 . Electronic Refrigerant Leak Detector ................... 190 .
REMOVAL ........................................................ 184 . PRECAUTIONS FOR HANDLING LEAK
INSTALLATION ................................................. 184 . DETECTOR ...................................................... 190.
Removal and Installation for Refrigerant Pressure CHECKING PROCEDURE ............................... 191 .
Sensor ................................................................. 185
. SERVICE DATA AND SPECIFICATIONS (SDS) ... 193 .
REMOVAL ........................................................ 185 . Service Data and Specifications (SDS) ............... 193 .
INSTALLATION ................................................. 185 . COMPRESSOR ................................................ 193 .
Removal and Installation for Condenser .............. 185 . LUBRICANT ...................................................... 193
.
REMOVAL ........................................................ 185 . REFRIGERANT ................................................ 193 .
INSTALLATION ................................................. 185 . ENGINE IDLING SPEED .................................. 193 .
Removal and Installation for Front Evaporator .... 186 . BELT TENSION ................................................ 193 .
Revision: October 2005 ATC-4 2005 QX56
PRECAUTIONS
PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS003WO
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
G 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
G 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
G 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) EJS003WP
WARNING:
G CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants H
are mixed compressor failure is likely to occur. Refer ATC-5, "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. I
G 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.
G 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