Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Quest 2004-2009 Approved Nissan Quest 2004 ATC
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J AIR CONDITIONER
A
B
SECTION
AUTOMATIC AIR CONDITIONER 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 (AUTOMATIC TEM-
A/C Identification Label ........................................... 7
. PERATURE CONTROL) .................................... 24 .
Precautions for Refrigerant Connection .................. 7 . BLOWER SPEED CONTROL ............................ 24 .
FEATURES OF NEW TYPE REFRIGERANT INTAKE DOORS CONTROL .............................. 24 . I
CONNECTION ..................................................... 7. MODE DOOR CONTROL .................................. 24 .
O-RING AND REFRIGERANT CONNECTION..... 8 DEFROSTER DOOR CONTROL ....................... 24 .
Precautions for Servicing Compressor ...................11 . MAGNET CLUTCH CONTROL .......................... 25 . ATC
Precautions for Service Equipment ........................11 . SELF-DIAGNOSTIC SYSTEM ........................... 25 .
RECOVERY/RECYCLING EQUIPMENT ............11 . Description of Control System ............................... 26 .
ELECTRONIC LEAK DETECTOR ......................11 . Control Operation .................................................. 26
.
K
VACUUM PUMP ................................................ 12 . DISPLAY SCREEN ............................................. 27 .
MANIFOLD GAUGE SET ................................... 12 . AUTO SWITCH .................................................. 27 .
SERVICE HOSES .............................................. 12 . TEMPERATURE CONTROL DIAL (TEMPERA-
SERVICE COUPLERS ....................................... 13 . TURE CONTROL) (DRIVER SIDE) .................... 27 . L
REFRIGERANT WEIGHT SCALE ..................... 13 . TEMPERATURE CONTROL DIAL (TEMPERA-
CHARGING CYLINDER ..................................... 13 . TURE CONTROL) (PASSENGER SIDE) ........... 27 .
Wiring Diagrams and Trouble Diagnosis ............... 13 . TEMPERATURE CONTROL DIAL (TEMPERA- M
PREPARATION ........................................................ 14
. TURE CONTROL) (REAR) ................................. 27 .
Special Service Tools ............................................ 14
. RECIRCULATION () SWITCH ............................ 27 .
HFC-134a (R-134a) Service Tools and Equipment 14 ... DEFROSTER () SWITCH ................................... 27 .
Commercial Service Tools ..................................... 16 . REAR WINDOW DEFOGGER SWITCH ............ 27 .
REFRIGERATION SYSTEM .................................... 18 . OFF SWITCH ..................................................... 27 .
Refrigerant Cycle .................................................. 18
. A/C SWITCH ...................................................... 27.
REFRIGERANT FLOW ...................................... 18 . MODE SWITCH ................................................. 27 .
Refrigerant System Protection .............................. 18 . FRONT BLOWER CONTROL SWITCH ............. 28 .
REFRIGERANT PRESSURE SENSOR ............ 18 . REAR BLOWER CONTROL DIAL ..................... 28 .
PRESSURE RELIEF VALVE .............................. 19 . Discharge Air Flow ................................................ 28.
Component Layout ................................................ 20. FRONT ............................................................... 28
.
FRONT REFRIGERATION SYSTEM ................. 20 . REAR ................................................................. 28
.
REAR REFRIGERATION SYSTEM ................... 21 . System Description ................................................ 29.
SWITCHES AND THEIR CONTROL FUNCTION 29 ...
CAN Communication System Description ............. 30 .
TROUBLE DIAGNOSIS ........................................... 31 .
Revision: January 2005 ATC-1 2004 Quest
CONSULT-II Function (BCM) ................................. 31 . SYMPTOM: .........................................................75 .
CONSULT-II BASIC OPERATION ...................... 31 . INSPECTION FLOW ...........................................75 .
DATA MONITOR ................................................. 32 . SYSTEM DESCRIPTION ....................................76 .
How to Perform Trouble Diagnosis for Quick and COMPONENT DESCRIPTION ...........................76 .
Accurate Repair ..................................................... 33 . DIAGNOSTIC PROCEDURE FOR
WORK FLOW ..................................................... 33 . DEFROSTER DOOR MOTOR ............................77 .
SYMPTOM TABLE ............................................. 33 . Front Blower Motor Circuit .....................................78 .
Component Parts and Harness Connector Location 35 ... INSPECTION FLOW ...........................................78 .
ENGINE COMPARTMENT ................................. 35 . SYSTEM DESCRIPTION ....................................79 .
FRONT PASSENGER COMPARTMENT ........... 36 . COMPONENT DESCRIPTION ...........................80 .
REAR PASSENGER COMPARTMENT .............. 37 . DIAGNOSTIC PROCEDURE FOR BLOWER
Schematic .............................................................. 38 . MOTOR ...............................................................80.
Wiring Diagram --A/C,A-- .................................... 39 . COMPONENT INSPECTION ..............................84 .
Intake Front Air Control Terminals and Reference Rear Blower Motor Circuit ......................................85 .
Value ...................................................................... 48
. INSPECTION FLOW ...........................................85 .
PIN CONNECTOR TERMINAL LAYOUT ........... 48 . SYSTEM DESCRIPTION ....................................86 .
TERMINALS AND REFERENCE VALUE FOR DIAGNOSTIC PROCEDURE FOR REAR
FRONT AIR CONTROL ...................................... 48 . BLOWER MOTOR ..............................................86 .
A/C System Self-diagnosis Function ..................... 50 . COMPONENT INSPECTION ..............................94 .
DESCRIPTION ................................................... 50 . Rear Air Control Circuit ..........................................96 .
Operational Check ................................................. 52 . INSPECTION FLOW ...........................................96 .
CHECKING MEMORY FUNCTION .................... 52 . SYSTEM DESCRIPTION ....................................97 .
CHECKING BLOWER ........................................ 52 . DIAGNOSTIC PROCEDURE FOR REAR AIR
CHECKING DISCHARGE AIR ........................... 53 . CONTROL ..........................................................97 .
CHECKING RECIRCULATION ........................... 53 . Magnet Clutch Circuit .............................................99 .
CHECKING TEMPERATURE DECREASE ........ 53 . INSPECTION FLOW ...........................................99 .
CHECKING TEMPERATURE INCREASE ......... 54 . SYSTEM DESCRIPTION .................................. 100 .
CHECK A/C SWITCH ......................................... 54 . DIAGNOSTIC PROCEDURE FOR MAGNET
CHECKING AUTO MODE .................................. 54 . CLUTCH ........................................................... 100 .
Power Supply and Ground Circuit for Front Air Con- COMPONENT INSPECTION ............................ 104 .
trol .......................................................................... 55
. Insufficient Cooling ............................................... 105 .
INSPECTION FLOW .......................................... 55 . INSPECTION FLOW ......................................... 105 .
COMPONENT DESCRIPTION ........................... 56 . PERFORMANCE TEST DIAGNOSES ............. 106 .
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 56 ... PERFORMANCE CHART ................................. 108 .
Mode Door Motor Circuit ....................................... 58 . TROUBLE DIAGNOSES FOR UNUSUAL PRES-
INSPECTION FLOW .......................................... 58 . SURE ................................................................ 109
.
SYSTEM DESCRIPTION ................................... 59 . Insufficient Heating .............................................. 112 .
COMPONENT DESCRIPTION ........................... 60 . INSPECTION FLOW ......................................... 112 .
DIAGNOSTIC PROCEDURE FOR MODE Noise .................................................................... 113
.
DOOR MOTOR .................................................. 60 . INSPECTION FLOW ......................................... 113 .
Air Mix Door Motor Circuit ..................................... 62 . Self-diagnosis ...................................................... 115.
INSPECTION FLOW .......................................... 62 . INSPECTION FLOW ......................................... 115 .
SYSTEM DESCRIPTION ................................... 63 . Memory Function ................................................. 116 .
COMPONENT DESCRIPTION ........................... 64 . INSPECTION FLOW ......................................... 116 .
DIAGNOSTIC PROCEDURE FOR AIR MIX Ambient Sensor Circuit ........................................ 117 .
DOOR MOTOR (DRIVER) .................................. 64 . COMPONENT DESCRIPTION ......................... 117 .
DIAGNOSTIC PROCEDURE FOR AIR MIX AMBIENT TEMPERATURE INPUT PROCESS . 117
DOOR MOTOR (PASSENGER) ......................... 66 . DIAGNOSTIC PROCEDURE FOR AMBIENT
DIAGNOSTIC PROCEDURE FOR AIR MIX SENSOR ........................................................... 117 .
DOOR MOTOR (REAR) ..................................... 68 . COMPONENT INSPECTION ............................ 119 .
Intake Door Motor Circuit ....................................... 71 . In-vehicle Sensor Circuit ...................................... 120 .
INSPECTION FLOW .......................................... 71 . COMPONENT DESCRIPTION ......................... 120 .
SYSTEM DESCRIPTION ................................... 72 . DIAGNOSTIC PROCEDURE FOR IN-VEHICLE
COMPONENT DESCRIPTION ........................... 73 . SENSOR ........................................................... 121 .
DIAGNOSTIC PROCEDURE FOR INTAKE COMPONENT INSPECTION ............................ 123 .
DOOR MOTOR (DRIVER) .................................. 73 . Optical Sensor Circuit .......................................... 123 .
DIAGNOSTIC PROCEDURE FOR INTAKE COMPONENT DESCRIPTION ......................... 123 .
DOOR MOTOR (PASSENGER) ......................... 73 . OPTICAL INPUT PROCESS ............................ 123 .
Defroster Door Motor Circuit .................................. 75 . DIAGNOSTIC PROCEDURE FOR OPTICAL
Revision: January 2005 ATC-2 2004 Quest
SENSOR .......................................................... 124 . Components ........................................................ 148 .
Intake Sensor Circuit ........................................... 125 . Removal and Installation ..................................... 149 . A
COMPONENT DESCRIPTION ........................ 125 . FRONT AIR MIX DOOR MOTOR (DRIVER) .... 149 .
DIAGNOSTIC PROCEDURE FOR INTAKE SEN- FRONT AIR MIX DOOR MOTOR (PASSENGER) 150 .
SOR ................................................................. 125
. REAR AIR MIX DOOR MOTOR ....................... 150 . B
COMPONENT INSPECTION ........................... 126 . VARIABLE BLOWER CONTROL .......................... 151 .
CONTROL UNIT .................................................... 127 . Removal and Installation ..................................... 151 .
Removal and Installation ..................................... 127 . REMOVAL ........................................................ 151 .
FRONT AIR CONTROL ................................... 127 . INSTALLATION ................................................ 151 . C
REAR AIR CONTROL ...................................... 127 . REAR BLOWER MOTOR RESISTOR ................... 152 .
AMBIENT SENSOR ............................................... 128 . Removal and Installation ..................................... 152 .
Removal and Installation ..................................... 128 . REMOVAL ........................................................ 152 . D
IN-VEHICLE SENSOR ........................................... 129 . INSTALLATION ................................................ 152 .
Removal and Installation ..................................... 129 . DUCTS AND GRILLES .......................................... 153 .
OPTICAL SENSOR ............................................... 130 . Components ........................................................ 153 . E
Removal and Installation ..................................... 130 . Removal and Installation ..................................... 156 .
INTAKE SENSOR .................................................. 131 . DEFROSTER NOZZLE .................................... 156 .
Removal and Installation ..................................... 131 . FRESH AIR DUCT ........................................... 156 .
REMOVAL ........................................................ 131 . DEFROSTER DUCT ........................................ 156 . F
INSTALLATION ................................................ 131 . RH AND LH SIDE DEMISTER DUCT .............. 156 .
BLOWER MOTOR ................................................. 132 . RH, LH, AND CENTER VENTILATOR DUCT .. 156 .
Removal and Installation ..................................... 132 . FLOOR CONNECTOR DUCT .......................... 156 . G
FRONT BLOWER MOTOR .............................. 132 . FLOOR DISTRIBUTION DUCT ........................ 156 .
REAR BLOWER MOTOR ................................ 133 . FLOOR DUCT .................................................. 156 .
IN-CABIN MICROFILTER ...................................... 134 . REAR OVERHEAD DUCT ............................... 156 . H
Removal and Installation ..................................... 134 . REAR FLOOR DUCT ....................................... 157 .
FUNCTION ....................................................... 134 . GRILLES .......................................................... 157 .
REPLACEMENT TIMING ................................. 134 . REFRIGERANT LINES .......................................... 158 .
I
REPLACEMENT PROCEDURES .................... 134 . HFC-134a (R-134a) Service Procedure .............. 158 .
HEATER & COOLING UNIT ASSEMBLY ............. 135 . SETTING OF SERVICE TOOLS AND EQUIP-
Components ........................................................ 135 . MENT ............................................................... 158
.
Removal and Installation ..................................... 136 . Components ........................................................ 160 . ATC
FRONT HEATER AND COOLING UNIT ASSEM- Removal and Installation for Compressor ........... 162 .
BLY ................................................................... 136
. REMOVAL ........................................................ 162 .
REAR HEATER AND COOLING UNIT ASSEM- INSTALLATION ................................................ 162 . K
BLY ................................................................... 137
. Removal and Installation for Compressor Clutch . 163
HEATER CORE ..................................................... 138 . REMOVAL ........................................................ 163 .
Components ........................................................ 138 . INSPECTION ................................................... 164 . L
Removal and Installation ..................................... 139 . INSTALLATION ................................................ 164 .
FRONT HEATER CORE .................................. 139 . BREAK-IN OPERATION ................................... 166 .
REAR HEATER CORE .................................... 140 . Removal and Installation for Low-pressure Flexible
HEATER PUMP ..................................................... 141 . Hose .................................................................... 166
. M
Removal and Installation ..................................... 141 . REMOVAL ........................................................ 166 .
REMOVAL ........................................................ 141 . INSTALLATION ................................................ 166 .
INSTALLATION ................................................ 141 . Removal and Installation for High-pressure Flexible
DEFROSTER DOOR MOTOR ............................... 142 . Hose .................................................................... 166
.
Removal and Installation ..................................... 142 . REMOVAL ........................................................ 166 .
REMOVAL ........................................................ 142 . INSTALLATION ................................................ 166 .
INSTALLATION ................................................ 142 . Removal and Installation for High-pressure Pipe . 166
INTAKE DOOR MOTOR ........................................ 143 . REMOVAL ........................................................ 166 .
Components ........................................................ 143 . INSTALLATION ................................................ 166 .
Removal and Installation ..................................... 144 . Removal and Installation for High/Low-pressure
DRIVER SIDE .................................................. 144 . Pipe ..................................................................... 167
.
PASSENGER SIDE .......................................... 145 . REMOVAL ........................................................ 167 .
MODE DOOR MOTOR .......................................... 146 . INSTALLATION ................................................ 167 .
Removal and Installation ..................................... 146 . Removal and Installation for Refrigerant Pressure
REMOVAL ........................................................ 146 . Sensor ................................................................. 167
.
INSTALLATION ................................................ 147 . REMOVAL ........................................................ 167 .
AIR MIX DOOR MOTOR ........................................ 148 . INSTALLATION ................................................ 167 .
Revision: January 2005 ATC-3 2004 Quest
Removal and Installation for Condenser .............. 167 . Checking for Refrigerant Leaks ........................... 172 .
REMOVAL ........................................................ 167
. Checking System for Leaks Using the Fluorescent
INSTALLATION ................................................. 168
. Dye Leak Detector ............................................... 172.
Removal and Installation for Front Evaporator .... 168 . Dye Injection ........................................................ 172
.
REMOVAL ........................................................ 169
. Electronic Refrigerant Leak Detector ................... 173 .
INSTALLATION ................................................. 169
. PRECAUTIONS FOR HANDLING LEAK
Removal and Installation for Rear Evaporator ..... 170 . DETECTOR ...................................................... 173.
REMOVAL ........................................................ 170
. CHECKING PROCEDURE ............................... 174 .
INSTALLATION ................................................. 171
. SERVICE DATA AND SPECIFICATIONS (SDS) ... 176 .
Removal and Installation for Front Expansion Valve 171 . Service Data and Specifications (SDS) ............... 176 .
REMOVAL ........................................................ 171
. COMPRESSOR ................................................ 176 .
INSTALLATION ................................................. 171
. LUBRICANT ...................................................... 176
.
Removal and Installation for Rear Expansion Valve 171 . REFRIGERANT ................................................ 176 .
REMOVAL ........................................................ 171
. ENGINE IDLING SPEED .................................. 176 .
INSTALLATION ................................................. 172
. BELT TENSION ................................................ 176 .
Revision: January 2005 ATC-4 2004 Quest
PRECAUTIONS
PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS001MN
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) EJS001MO
WARNING:
q 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
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- ATC
lowing handling precautions must be observed:
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