Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Quest 2004-2009 Approved Nissan Quest 2008 ATC
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AIR CONDITIONER
A
SECTION
AUTOMATIC AIR CONDITIONER
ATC B
C
D
E
CONTENTS
SERVICE INFORMATION ........................... 3
. Component Parts and Harness Connector Loca- F
tion ..........................................................................31
.
PRECAUTIONS .................................................. 3
. Schematic ...............................................................35.
Precaution for Supplemental Restraint System Wiring Diagram - A/C,A - ........................................36 . G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Front Air Control Terminal and Reference Value ....44
SIONER" .................................................................. 3
. A/C System Self-Diagnosis Function ......................45 .
Precaution for Working with HFC-134a (R-134a)...... 3 Operational Check (Front) ......................................47 .
H
Contaminated Refrigerant ........................................ 3 . Operational Check (Rear) .......................................48 .
General Refrigerant Precaution ............................... 4 . Power Supply and Ground Circuit for Front Air
Precaution for Leak Detection Dye .......................... 4 . Control ....................................................................49
.
A/C Identification Label ............................................ 4
. Mode Door Motor Circuit ........................................51 . I
Precaution for Refrigerant Connection ..................... 4 . Air Mix Door Motor Circuit ......................................57 .
Precaution for Service of Compressor ..................... 8 . Intake Door Motor Circuit ........................................69 .
Precaution for Service Equipment ............................ 9 . Defroster Door Motor Circuit ...................................74 . ATC
Front Blower Motor Circuit ......................................76 .
PREPARATION .................................................11
. Rear Blower Motor Circuit ......................................84 .
Special Service Tool .............................................. 11
. Rear Air Temperature Control Circuit .....................93 .
HFC-134a (R-134a) Service Tool and Equipment 11 .... K
Magnet Clutch Circuit .............................................98 .
Commercial Service Tool ....................................... 13
. Insufficient Cooling ............................................... 102 .
REFRIGERATION SYSTEM .............................15
. Insufficient Heating ............................................... 109 .
Heater Pump Circuit ............................................. 110 . L
Refrigerant Cycle ................................................... 15
.
Noise .................................................................... 113
.
Refrigerant System Protection ............................... 15 .
Self-Diagnosis ...................................................... 114 .
Component Part Location ...................................... 16.
Memory Function .................................................. 116 . M
OIL .....................................................................19
. Ambient Sensor Circuit ......................................... 117 .
Maintenance of Oil Quantity in Compressor .......... 19
. In-vehicle Sensor Circuit ....................................... 119 .
Optical Sensor Circuit ........................................... 122 . N
AIR CONDITIONER CONTROL ........................21
. Intake Sensor Circuit ............................................ 125 .
Description ............................................................. 21
.
Operation ............................................................... 21
. CONTROL UNIT .............................................. 127
Description of Control System ................................ 22 . Removal and Installation ...................................... 127
. O
Control Operation ................................................... 23
.
Discharge Air Flow ................................................. 25
.
AMBIENT SENSOR ........................................ 129
Removal and Installation ...................................... 129
.
System Description ................................................ 26
. P
CAN Communication System Description .............. 27 . IN-VEHICLE SENSOR .................................... 130
TROUBLE DIAGNOSIS ....................................28
. Removal and Installation ...................................... 130
.
CONSULT-III Function (HVAC) .............................. 28 . OPTICAL SENSOR ......................................... 131
CONSULT-III Function (BCM) ................................ 29 . Removal and Installation ...................................... 131
.
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ..................................................... 30
. INTAKE SENSOR ........................................... 132
Revision: August 2007 ATC-1 2008 Quest
Removal and Installation ......................................132
. DUCTS AND GRILLES ................................... 155
.
Component .......................................................... 155
.
BLOWER MOTOR .......................................... 134
. Removal and Installation ...................................... 158.
Component ...........................................................134
.
Removal and Installation ......................................135 . REFRIGERANT LINES .................................... 160
.
HFC-134a (R-134a) Service Procedure ............... 160 .
IN-CABIN MICROFILTER ............................... 136
. Component .......................................................... 162 .
Removal and Installation ......................................136
. Removal and Installation for Compressor ............ 164 .
HEATER & COOLING UNIT ASSEMBLY ...... 137
. Removal and Installation for Compressor Clutch . 165
Removal and Installation for Low-Pressure Flexi-
Component ...........................................................137
.
ble Hose ............................................................... 168
.
Removal and Installation ......................................138 .
Removal and Installation for High-pressure Flexi-
HEATER CORE .............................................. 140
. ble Hose ............................................................... 168
.
Component ...........................................................140
. Removal and Installation for High-pressure Pipe . 169
Removal and Installation ......................................141 . Removal and Installation for High/Low-Pressure
Pipe ...................................................................... 169
.
HEATER PUMP .............................................. 143
. Removal and Installation for Refrigerant Pressure
Removal and Installation ......................................143
. Sensor .................................................................. 173
.
Removal and Installation for Condenser .............. 173 .
DEFROSTER DOOR MOTOR ........................ 144
. Removal and Installation for Front Evaporator .... 175 .
Removal and Installation ......................................144
. Removal and Installation for Rear Evaporator ..... 177 .
INTAKE DOOR MOTOR ................................. 145
. Removal and Installation for Front Expansion
Valve .................................................................... 178
.
Component ...........................................................145
.
Removal and Installation ......................................146 . Removal and Installation for Rear Expansion
Valve .................................................................... 178
.
MODE DOOR MOTOR ................................... 148
. Checking of Refrigerant Leaks ............................. 179 .
Removal and Installation ......................................148
. Checking System for Leaks Using the Fluorescent
Dye Leak Detector ............................................... 179 .
AIR MIX DOOR MOTOR ................................. 150
. Dye Injection ........................................................ 179.
Component ...........................................................150
. Electronic Refrigerant Leak Detector ................... 180 .
Removal and Installation ......................................151 .
SERVICE DATA AND SPECIFICATIONS
VARIABLE BLOWER CONTROL .................. 153
. (SDS) ............................................................... 183
.
Component ...........................................................153
. Service Data and Specification (SDS) ................. 183
.
Removal and Installation ......................................154 .
Revision: August 2007 ATC-2 2008 Quest
PRECAUTIONS
< SERVICE INFORMATION >
SERVICE INFORMATION A
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT B
PRE-TENSIONER" INFOID:0000000001718831
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along C
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. D
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING: E
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