Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Quest 2004-2009 Approved Nissan Quest 2006 ATC
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J AIR CONDITIONER
A
B
SECTION
AUTOMATIC AIR CONDITIONER C
D
E
CONTENTS
PRECAUTIONS ......................................................... 5 . AIR CONDITIONER CONTROL .............................. 25 . F
Precautions for Supplemental Restraint System Description ............................................................. 25
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Operation ............................................................... 25
.
SIONER" ................................................................. 5. AIR MIX DOORS CONTROL (AUTOMATIC TEM- G
Precautions for Working with HFC-134a (R-134a) 5 ..... PERATURE CONTROL) .................................... 25 .
Contaminated Refrigerant ....................................... 5 . BLOWER SPEED CONTROL ............................ 25 .
General Refrigerant Precautions ............................. 6 . INTAKE DOORS CONTROL .............................. 25 .
H
Precautions for Leak Detection Dye ........................ 6 . MODE DOOR CONTROL .................................. 25 .
A/C Identification Label ........................................... 6 . DEFROSTER DOOR CONTROL ....................... 25 .
Precautions for Refrigerant Connection .................. 6 . MAGNET CLUTCH CONTROL .......................... 26 .
FEATURES OF NEW TYPE REFRIGERANT SELF-DIAGNOSTIC SYSTEM ........................... 26 . I
CONNECTION ..................................................... 7 . Description of Control System ............................... 27 .
O-RING AND REFRIGERANT CONNECTION..... 8 Control Operation .................................................. 27.
Precautions for Servicing Compressor ...................11 . DISPLAY SCREEN ............................................. 28 . ATC
Precautions for Service Equipment ........................11 . AUTO SWITCH .................................................. 28 .
RECOVERY/RECYCLING EQUIPMENT ............11 . TEMPERATURE CONTROL DIAL (DRIVER
ELECTRONIC LEAK DETECTOR ......................11 . SIDE) .................................................................. 28
.
K
VACUUM PUMP ................................................ 12 . TEMPERATURE CONTROL DIAL (PASSEN-
MANIFOLD GAUGE SET ................................... 12 . GER SIDE) ......................................................... 28
.
SERVICE HOSES .............................................. 12 . TEMPERATURE CONTROL DIAL (REAR) ........ 28 .
SERVICE COUPLERS ....................................... 13 . RECIRCULATION () SWITCH ............................ 28 . L
REFRIGERANT WEIGHT SCALE ..................... 13 . DEFROSTER () SWITCH ................................... 28 .
CHARGING CYLINDER ..................................... 13 . REAR WINDOW DEFOGGER SWITCH ............ 28 .
PREPARATION ........................................................ 14 . OFF SWITCH ..................................................... 28 . M
Special Service Tools ............................................ 14 . A/C SWITCH ...................................................... 28 .
HFC-134a (R-134a) Service Tools and Equipment 14 ... MODE DIAL ........................................................ 28.
Commercial Service Tools ..................................... 17 . FRONT BLOWER CONTROL DIAL ................... 29 .
REFRIGERATION SYSTEM .................................... 18 . REAR BLOWER CONTROL DIAL ..................... 29 .
Refrigerant Cycle .................................................. 18 . Discharge Air Flow ................................................ 29 .
REFRIGERANT FLOW ...................................... 18 . FRONT ............................................................... 29
.
Refrigerant System Protection .............................. 18 . REAR ................................................................. 29
.
REFRIGERANT PRESSURE SENSOR ............ 18 . System Description ................................................ 30 .
PRESSURE RELIEF VALVE ............................. 19 . SWITCHES AND THEIR CONTROL FUNCTION 30 ...
Component Layout ................................................ 20 . CAN Communication System Description ............. 31 .
FRONT REFRIGERATION SYSTEM ................. 20 . TROUBLE DIAGNOSIS ........................................... 32 .
REAR REFRIGERATION SYSTEM ................... 21 . CONSULT-II Function (HVAC) ............................... 32 .
OIL ........................................................................... 22
. CONSULT-II BASIC OPERATION ...................... 32 .
Maintenance of Oil Quantity in Compressor ......... 22 . SELF-DIAGNOSIS ............................................. 33 .
OIL ..................................................................... 22
. DATA MONITOR ................................................ 33 .
CHECKING AND ADJUSTING .......................... 22 . CONSULT-II Function (BCM) ................................ 35 .
Revision: July 2006 ATC-1 2006 Quest
CONSULT-II BASIC OPERATION ...................... 35 . SYSTEM DESCRIPTION ....................................88 .
DATA MONITOR ................................................. 36 . COMPONENT DESCRIPTION ...........................88 .
How to Perform Trouble Diagnosis for Quick and DIAGNOSTIC PROCEDURE FOR
Accurate Repair ..................................................... 37 . DEFROSTER DOOR MOTOR ............................89 .
WORK FLOW ..................................................... 37 . Front Blower Motor Circuit .....................................91 .
SYMPTOM TABLE ............................................. 37 . INSPECTION FLOW ...........................................91 .
Component Parts and Harness Connector Location 39 ... SYSTEM DESCRIPTION ....................................92 .
ENGINE COMPARTMENT ................................. 39 . COMPONENT DESCRIPTION ...........................93 .
FRONT PASSENGER COMPARTMENT ........... 40 . DIAGNOSTIC PROCEDURE FOR BLOWER
REAR PASSENGER COMPARTMENT .............. 41 . MOTOR ...............................................................93.
Schematic .............................................................. 42 . COMPONENT INSPECTION ..............................96 .
Wiring Diagram -- A/C,A -- .................................. 43 . Rear Blower Motor Circuit ......................................98 .
Front Air Control Terminals and Reference Value... 52 INSPECTION FLOW ...........................................98 .
PIN CONNECTOR TERMINAL LAYOUT ........... 52 . SYSTEM DESCRIPTION ....................................99 .
TERMINALS AND REFERENCE VALUE FOR DIAGNOSTIC PROCEDURE FOR REAR
FRONT AIR CONTROL ...................................... 52 . BLOWER MOTOR ..............................................99 .
A/C System Self-diagnosis Function ..................... 54 . COMPONENT INSPECTION ............................ 107 .
DESCRIPTION ................................................... 54 . Rear Air Control Circuit ........................................ 109 .
Operational Check ................................................. 56 . INSPECTION FLOW ......................................... 109 .
CHECKING MEMORY FUNCTION .................... 56 . SYSTEM DESCRIPTION .................................. 110 .
CHECKING BLOWER ........................................ 56 . DIAGNOSTIC PROCEDURE FOR REAR AIR
CHECKING DISCHARGE AIR ........................... 57 . CONTROL ........................................................ 110 .
CHECKING RECIRCULATION ........................... 57 . Magnet Clutch Circuit ........................................... 112 .
CHECKING TEMPERATURE DECREASE ........ 57 . INSPECTION FLOW ......................................... 112 .
CHECKING TEMPERATURE INCREASE ......... 58 . SYSTEM DESCRIPTION .................................. 113 .
CHECK A/C SWITCH ......................................... 58 . DIAGNOSTIC PROCEDURE FOR MAGNET
CHECKING AUTO MODE .................................. 58 . CLUTCH ........................................................... 113 .
Power Supply and Ground Circuit for Front Air Con- COMPONENT INSPECTION ............................ 117 .
trol .......................................................................... 59
. Insufficient Cooling ............................................... 118 .
INSPECTION FLOW .......................................... 59 . INSPECTION FLOW ......................................... 118 .
COMPONENT DESCRIPTION ........................... 60 . PERFORMANCE TEST DIAGNOSES ............. 119 .
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 60 ... PERFORMANCE CHART ................................. 121 .
Mode Door Motor Circuit ....................................... 62 . TROUBLE DIAGNOSES FOR UNUSUAL PRES-
INSPECTION FLOW .......................................... 62 . SURE ................................................................ 122
.
SYSTEM DESCRIPTION ................................... 63 . Insufficient Heating .............................................. 125 .
COMPONENT DESCRIPTION ........................... 64 . INSPECTION FLOW ......................................... 125 .
DIAGNOSTIC PROCEDURE FOR MODE Heater Pump Circuit ............................................. 126 .
DOOR MOTOR .................................................. 64 . SYSTEM DESCRIPTION .................................. 126 .
Air Mix Door Motor Circuit ..................................... 68 . DIAGNOSTIC PROCEDURE FOR HEATER
INSPECTION FLOW .......................................... 68 . PUMP CIRCUIT ................................................ 127 .
SYSTEM DESCRIPTION ................................... 69 . COMPONENT INSPECTION ............................ 128 .
COMPONENT DESCRIPTION ........................... 70 . Noise .................................................................... 129
.
DIAGNOSTIC PROCEDURE FOR AIR MIX INSPECTION FLOW ......................................... 129 .
DOOR MOTOR (DRIVER) .................................. 70 . Self-diagnosis ...................................................... 131.
DIAGNOSTIC PROCEDURE FOR AIR MIX INSPECTION FLOW ......................................... 131 .
DOOR MOTOR (PASSENGER) ......................... 74 . Memory Function ................................................. 132 .
DIAGNOSTIC PROCEDURE FOR AIR MIX INSPECTION FLOW ......................................... 132 .
DOOR MOTOR (REAR) ..................................... 77 . Ambient Sensor Circuit ........................................ 133 .
Intake Door Motor Circuit ....................................... 81 . COMPONENT DESCRIPTION ......................... 133 .
INSPECTION FLOW .......................................... 81 . AMBIENT TEMPERATURE INPUT PROCESS .133
SYSTEM DESCRIPTION ................................... 82 . DIAGNOSTIC PROCEDURE FOR AMBIENT
COMPONENT DESCRIPTION ........................... 83 . SENSOR ........................................................... 133 .
DIAGNOSTIC PROCEDURE FOR INTAKE COMPONENT INSPECTION ............................ 135 .
DOOR MOTOR (DRIVER) .................................. 83 . In-vehicle Sensor Circuit ...................................... 136 .
DIAGNOSTIC PROCEDURE FOR INTAKE COMPONENT DESCRIPTION ......................... 136 .
DOOR MOTOR (PASSENGER) ......................... 85 . DIAGNOSTIC PROCEDURE FOR IN-VEHICLE
Defroster Door Motor Circuit .................................. 87 . SENSOR ........................................................... 137 .
SYMPTOM: ......................................................... 87 . COMPONENT INSPECTION ............................ 139 .
INSPECTION FLOW .......................................... 87 . Optical Sensor Circuit .......................................... 139 .
Revision: July 2006 ATC-2 2006 Quest
COMPONENT DESCRIPTION ........................ 139 . Components ........................................................ 158 .
OPTICAL INPUT PROCESS ........................... 139 . Removal and Installation ..................................... 159 . A
DIAGNOSTIC PROCEDURE FOR OPTICAL DRIVER SIDE .................................................. 159 .
SENSOR .......................................................... 140 . PASSENGER SIDE .......................................... 160 .
Intake Sensor Circuit ........................................... 141 . MODE DOOR MOTOR ........................................... 161 . B
COMPONENT DESCRIPTION ........................ 141 . Removal and Installation ..................................... 161 .
DIAGNOSTIC PROCEDURE FOR INTAKE SEN- REMOVAL ........................................................ 161 .
SOR ................................................................. 141
. INSTALLATION ................................................ 162 .
COMPONENT INSPECTION ........................... 142 . AIR MIX DOOR MOTOR ........................................ 163 . C
CONTROL UNIT .................................................... 143 . Components ........................................................ 163 .
Removal and Installation ..................................... 143 . Removal and Installation ..................................... 164 .
FRONT AIR CONTROL ................................... 143 . FRONT AIR MIX DOOR MOTOR (DRIVER) .... 164 . D
REAR AIR CONTROL ...................................... 143 . FRONT AIR MIX DOOR MOTOR (PASSENGER) 165 .
AMBIENT SENSOR ............................................... 144 . REAR AIR MIX DOOR MOTOR ....................... 165 .
Removal and Installation ..................................... 144 . VARIABLE BLOWER CONTROL .......................... 166 . E
REMOVAL ........................................................ 144 . Removal and Installation ..................................... 166 .
INSTALLATION ................................................ 144 . REMOVAL ........................................................ 166 .
IN-VEHICLE SENSOR ........................................... 145 . INSTALLATION ................................................ 166 .
Removal and Installation ..................................... 145 . REAR BLOWER MOTOR RESISTOR ................... 167 . F
REMOVAL ........................................................ 145 . Removal and Installation ..................................... 167 .
INSTALLATION ................................................ 145 . REMOVAL ........................................................ 167 .
OPTICAL SENSOR ............................................... 146 . INSTALLATION ................................................ 167 . G
Removal and Installation ..................................... 146 . DUCTS AND GRILLES .......................................... 168 .
INTAKE SENSOR .................................................. 147 . Components ........................................................ 168 .
Removal and Installation ..................................... 147 . Removal and Installation ..................................... 171 . H
REMOVAL ........................................................ 147 . DEFROSTER NOZZLE .................................... 171 .
INSTALLATION ................................................ 147 . FRESH AIR DUCT ........................................... 171 .
BLOWER MOTOR ................................................. 148 . DEFROSTER DUCT ........................................ 171 .
I
Removal and Installation ..................................... 148 . RH AND LH SIDE DEMISTER DUCT .............. 171 .
FRONT BLOWER MOTOR .............................. 148 . RH, LH, AND CENTER VENTILATOR DUCT .. 171 .
REAR BLOWER MOTOR ................................ 148 . FLOOR CONNECTOR DUCT .......................... 171 .
IN-CABIN MICROFILTER ...................................... 149 . FLOOR DISTRIBUTION DUCT ........................ 171 . ATC
Removal and Installation ..................................... 149 . FLOOR DUCT .................................................. 172 .
FUNCTION ....................................................... 149 . REAR OVERHEAD DUCT ............................... 172 .
REPLACEMENT TIMING ................................. 149 . REAR FLOOR DUCT ....................................... 172 . K
REPLACEMENT PROCEDURES .................... 149 . GRILLES .......................................................... 172.
HEATER & COOLING UNIT ASSEMBLY ............. 150 . REFRIGERANT LINES .......................................... 173 .
Components ........................................................ 150 . HFC-134a (R-134a) Service Procedure .............. 173 . L
Removal and Installation ..................................... 151 . SETTING OF SERVICE TOOLS AND EQUIP-
FRONT HEATER AND COOLING UNIT ASSEM- MENT ............................................................... 173
.
BLY ................................................................... 151
. Components ........................................................ 175 .
REAR HEATER AND COOLING UNIT ASSEM- Removal and Installation for Compressor ........... 177 . M
BLY ................................................................... 152
. REMOVAL ........................................................ 177 .
HEATER CORE ..................................................... 153 . INSTALLATION ................................................ 177 .
Components ........................................................ 153 . Removal and Installation for Compressor Clutch . 178
Removal and Installation ..................................... 154 . REMOVAL ........................................................ 178 .
FRONT HEATER CORE .................................. 154 . INSPECTION ................................................... 179 .
REAR HEATER CORE .................................... 155 . INSTALLATION ................................................ 179 .
HEATER PUMP ..................................................... 156 . BREAK-IN OPERATION ................................... 181 .
Removal and Installation ..................................... 156 . Removal and Installation for Low-pressure Flexible
REMOVAL ........................................................ 156 . Hose .................................................................... 181
.
INSTALLATION ................................................ 156 . REMOVAL ........................................................ 181 .
DEFROSTER DOOR MOTOR ............................... 157 . INSTALLATION ................................................ 181 .
Removal and Installation ..................................... 157 . Removal and Installation for High-pressure Flexible
REMOVAL ........................................................ 157 . Hose .................................................................... 181
.
INSTALLATION ................................................ 157 . REMOVAL ........................................................ 181 .
INTAKE DOOR MOTOR ........................................ 158 . INSTALLATION ................................................ 181 .
Removal and Installation for High-pressure Pipe . 182
REMOVAL ........................................................ 182 .
Revision: July 2006 ATC-3 2006 Quest
INSTALLATION ................................................. 182 . INSTALLATION ................................................. 191 .
Removal and Installation for High/Low-pressure Removal and Installation for Rear Expansion Valve.191
Pipe ..................................................................... 182
. REMOVAL ......................................................... 191 .
REMOVAL ........................................................ 182 . INSTALLATION ................................................. 191 .
INSTALLATION ................................................. 184 . Checking for Refrigerant Leaks ........................... 192 .
Removal and Installation for Refrigerant Pressure Checking System for Leaks Using the Fluorescent
Sensor ................................................................. 186
. Dye Leak Detector ............................................... 192 .
REMOVAL ........................................................ 186 . Dye Injection ........................................................ 192
.
INSTALLATION ................................................. 186 . Electronic Refrigerant Leak Detector ................... 193 .
Removal and Installation for Condenser .............. 186 . PRECAUTIONS FOR HANDLING LEAK
REMOVAL ........................................................ 186 . DETECTOR ...................................................... 193 .
INSTALLATION ................................................. 187 . CHECKING PROCEDURE ............................... 194 .
Removal and Installation for Front Evaporator .... 188 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 196 .
REMOVAL ........................................................ 188 . Service Data and Specifications (SDS) ............... 196 .
INSTALLATION ................................................. 189 . COMPRESSOR ................................................ 196 .
Removal and Installation for Rear Evaporator ..... 190 . OIL .................................................................... 196
.
REMOVAL ........................................................ 190 . REFRIGERANT ................................................ 196 .
INSTALLATION ................................................. 191 . ENGINE IDLING SPEED .................................. 196 .
Removal and Installation for Front Expansion Valve 191 . BELT TENSION ................................................ 196 .
REMOVAL ........................................................ 191 .
Revision: July 2006 ATC-4 2006 Quest
PRECAUTIONS
PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS004J5
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) EJS004J6
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 recov-
ery/recycling equipment and refrigerant identifier. I
q Use only specified oil for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components.
If oil other than that specified is used, compressor failure is likely to occur.
q The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following ATC
handling precautions must be observed:
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