Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Quest 2004-2009 Approved Nissan Quest 2005 ATC
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J AIR CONDITIONER
A
B
SECTION
AUTOMATIC AIR CONDITIONER C
D
E
CONTENTS
PRECAUTIONS ......................................................... 5
. AIR CONDITIONER CONTROL .............................. 24 . F
Precautions for Supplemental Restraint System Description ............................................................. 24
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Operation ............................................................... 24
.
SIONER" ................................................................. 5
. AIR MIX DOORS CONTROL (AUTOMATIC TEM- G
Precautions for Working with HFC-134a (R-134a) 5 ..... PERATURE CONTROL) .................................... 24 .
Contaminated Refrigerant ....................................... 5 . FAN SPEED CONTROL ..................................... 24 .
General Refrigerant Precautions ............................. 6 . INTAKE DOORS CONTROL .............................. 24 .
H
Precautions for Leak Detection Dye ........................ 6 . MODE DOOR CONTROL .................................. 24 .
A/C Identification Label ........................................... 7
. DEFROSTER DOOR CONTROL ....................... 24 .
Precautions for Refrigerant Connection .................. 7 . MAGNET CLUTCH CONTROL .......................... 25 .
FEATURES OF NEW TYPE REFRIGERANT SELF-DIAGNOSTIC SYSTEM ........................... 25 . I
CONNECTION ..................................................... 7. Description of Control System ............................... 26 .
O-RING AND REFRIGERANT CONNECTION..... 8 Control Operation .................................................. 26
.
Precautions for Servicing Compressor ...................11 . DISPLAY SCREEN ............................................. 27 . ATC
Precautions for Service Equipment ........................11 . AUTO SWITCH .................................................. 27 .
RECOVERY/RECYCLING EQUIPMENT ............11 . TEMPERATURE SWITCH (TEMPERATURE
ELECTRONIC LEAK DETECTOR ......................11 . CONTROL) (DRIVER SIDE) .............................. 27 .
K
VACUUM PUMP ................................................ 12 . TEMPERATURE SWITCH (TEMPERATURE
MANIFOLD GAUGE SET ................................... 12 . CONTROL) (PASSENGER SIDE) ...................... 27 .
SERVICE HOSES .............................................. 12 . TEMPERATURE SWITCH (TEMPERATURE
SERVICE COUPLERS ....................................... 13 . CONTROL) (REAR) ........................................... 27 . L
CHARGING CYLINDER ..................................... 13 . RECIRCULATION () SWITCH ............................ 27 .
Wiring Diagrams and Trouble Diagnosis ............... 13 . DEFROSTER (DEF) SWITCH ............................ 27 .
PREPARATION ........................................................ 14
. REAR WINDOW DEFOGGER SWITCH ............ 27 . M
Special Service Tools ............................................ 14
. OFF SWITCH ..................................................... 27 .
HFC-134a (R-134a) Service Tools and Equipment 14 ... A/C SWITCH ...................................................... 27.
Commercial Service Tools ..................................... 16 . MODE SWITCH ................................................. 27 .
REFRIGERATION SYSTEM .................................... 18 . FRONT FAN CONTROL SWITCH ..................... 28 .
Refrigerant Cycle .................................................. 18
. REAR FAN CONTROL SWITCH ........................ 28 .
REFRIGERANT FLOW ...................................... 18 . Discharge Air Flow ................................................ 28.
Refrigerant System Protection .............................. 18 . FRONT ............................................................... 28
.
REFRIGERANT PRESSURE SENSOR ............ 18 . REAR ................................................................. 28
.
PRESSURE RELIEF VALVE ............................. 19 . System Description ................................................ 29.
Component Layout ................................................ 20. SWITCHES AND THEIR CONTROL FUNCTION 29 ...
FRONT REFRIGERATION SYSTEM ................. 20 . CAN Communication System Description ............. 30 .
REAR REFRIGERATION SYSTEM ................... 21 . TROUBLE DIAGNOSIS ........................................... 31 .
LUBRICANT ............................................................ 22
. CONSULT-II Function (BCM) ................................ 31 .
Maintenance of Lubricant Quantity in Compressor 22 ... CONSULT-II BASIC OPERATION ...................... 31 .
LUBRICANT ....................................................... 22
. DATA MONITOR ................................................ 32 .
CHECKING AND ADJUSTING .......................... 22 . How to Perform Trouble Diagnosis for Quick and
Revision: September 2004 ATC-1 2005 Quest
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 -- ...................................... 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
SYMPTOM: ......................................................... 75 . SENSOR ........................................................... 124 .
INSPECTION FLOW .......................................... 75 . Intake Sensor Circuit ............................................ 125 .
SYSTEM DESCRIPTION ................................... 76 . COMPONENT DESCRIPTION ......................... 125 .
COMPONENT DESCRIPTION ........................... 76 . DIAGNOSTIC PROCEDURE FOR INTAKE SEN-
Revision: September 2004 ATC-2 2005 Quest
SOR ................................................................. 125
. Components ........................................................ 147 .
COMPONENT INSPECTION ........................... 126 . Removal and Installation ..................................... 148 . A
CONTROL UNIT .................................................... 127 . FRONT AIR MIX DOOR MOTOR (DRIVER) .... 148 .
Removal and Installation ..................................... 127 . FRONT AIR MIX DOOR MOTOR (PASSENGER) 149 .
FRONT AIR CONTROL ................................... 127 . REAR AIR MIX DOOR MOTOR ....................... 149 . B
REAR AIR CONTROL ...................................... 127 . VARIABLE BLOWER CONTROL .......................... 150 .
AMBIENT SENSOR ............................................... 128 . Removal and Installation ..................................... 150 .
Removal and Installation ..................................... 128 . REMOVAL ........................................................ 150 .
REMOVAL ........................................................ 128 . INSTALLATION ................................................ 150 . C
INSTALLATION ................................................ 128 . REAR BLOWER MOTOR RESISTOR ................... 151 .
IN-VEHICLE SENSOR ........................................... 129 . Removal and Installation ..................................... 151 .
Removal and Installation ..................................... 129 . REMOVAL ........................................................ 151 . D
REMOVAL ........................................................ 129 . INSTALLATION ................................................ 151 .
INSTALLATION ................................................ 129 . DUCTS AND GRILLES .......................................... 152 .
OPTICAL SENSOR ............................................... 130 . Components ........................................................ 152 . E
Removal and Installation ..................................... 130 . Removal and Installation ..................................... 155 .
INTAKE SENSOR .................................................. 131 . DEFROSTER NOZZLE .................................... 155 .
Removal and Installation ..................................... 131 . FRESH AIR DUCT ........................................... 155 .
REMOVAL ........................................................ 131 . DEFROSTER DUCT ........................................ 155 . F
INSTALLATION ................................................ 131 . RH AND LH SIDE DEMISTER DUCT .............. 155 .
BLOWER MOTOR ................................................. 132 . RH, LH, AND CENTER VENTILATOR DUCT .. 155 .
Removal and Installation ..................................... 132 . FLOOR CONNECTOR DUCT .......................... 155 . G
FRONT BLOWER MOTOR .............................. 132 . FLOOR DISTRIBUTION DUCT ........................ 155 .
REAR BLOWER MOTOR ................................ 132 . FLOOR DUCT .................................................. 156 .
IN-CABIN MICROFILTER ...................................... 133 . REAR OVERHEAD DUCT ............................... 156 . H
Removal and Installation ..................................... 133 . REAR FLOOR DUCT ....................................... 156 .
FUNCTION ....................................................... 133 . GRILLES .......................................................... 156 .
REPLACEMENT TIMING ................................. 133 . REFRIGERANT LINES .......................................... 157 .
I
REPLACEMENT PROCEDURES .................... 133 . HFC-134a (R-134a) Service Procedure .............. 157 .
HEATER & COOLING UNIT ASSEMBLY ............. 134 . SETTING OF SERVICE TOOLS AND EQUIP-
Components ........................................................ 134 . MENT ............................................................... 157
.
Removal and Installation ..................................... 135 . Components ........................................................ 159 . ATC
FRONT HEATER AND COOLING UNIT ASSEM- Removal and Installation for Compressor ........... 161 .
BLY ................................................................... 135
. REMOVAL ........................................................ 161 .
REAR HEATER AND COOLING UNIT ASSEM- INSTALLATION ................................................ 161 . K
BLY ................................................................... 136
. Removal and Installation for Compressor Clutch . 162
HEATER CORE ..................................................... 137 . REMOVAL ........................................................ 162 .
Components ........................................................ 137 . INSPECTION ................................................... 163 . L
Removal and Installation ..................................... 138 . INSTALLATION ................................................ 163 .
FRONT HEATER CORE .................................. 138 . BREAK-IN OPERATION ................................... 165 .
REAR HEATER CORE .................................... 139 . Removal and Installation for Low-pressure Flexible
HEATER PUMP ..................................................... 140 . Hose .................................................................... 165
. M
Removal and Installation ..................................... 140 . REMOVAL ........................................................ 165 .
REMOVAL ........................................................ 140 . INSTALLATION ................................................ 165 .
INSTALLATION ................................................ 140 . Removal and Installation for High-pressure Flexible
DEFROSTER DOOR MOTOR ............................... 141 . Hose .................................................................... 165
.
Removal and Installation ..................................... 141 . REMOVAL ........................................................ 165 .
REMOVAL ........................................................ 141 . INSTALLATION ................................................ 165 .
INSTALLATION ................................................ 141 . Removal and Installation for High-pressure Pipe . 166
INTAKE DOOR MOTOR ........................................ 142 . REMOVAL ........................................................ 166 .
Components ........................................................ 142 . INSTALLATION ................................................ 166 .
Removal and Installation ..................................... 143 . Removal and Installation for High/Low-pressure
DRIVER SIDE .................................................. 143 . Pipe ..................................................................... 166
.
PASSENGER SIDE .......................................... 144 . REMOVAL ........................................................ 166 .
MODE DOOR MOTOR .......................................... 145 . INSTALLATION ................................................ 166 .
Removal and Installation ..................................... 145 . Removal and Installation for Refrigerant Pressure
REMOVAL ........................................................ 145 . Sensor ................................................................. 166
.
INSTALLATION ................................................ 146 . REMOVAL ........................................................ 166 .
AIR MIX DOOR MOTOR ........................................ 147 . INSTALLATION ................................................ 166 .
Revision: September 2004 ATC-3 2005 Quest
Removal and Installation for Condenser .............. 167 . Checking for Refrigerant Leaks ........................... 172 .
REMOVAL ........................................................ 167
. Checking System for Leaks Using the Fluorescent
INSTALLATION ................................................. 167
. Dye Leak Detector ............................................... 172.
Removal and Installation for Front Evaporator .... 168 . Dye Injection ........................................................ 172
.
REMOVAL ........................................................ 168
. 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 ................................................. 171
. BELT TENSION ................................................ 176 .
Revision: September 2004 ATC-4 2005 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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