Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Quest 2004-2009 Approved Nissan Quest 2007 ATC
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J AIR CONDITIONER
A
AUTOMATIC AIR CONDITIONER
SECTION ATC B
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 . REAR TEMPERATURE/MODE CONTROL DIAL
SERVICE COUPLERS ....................................... 13 . (FRONT) ............................................................. 28
. L
REFRIGERANT WEIGHT SCALE ..................... 13 . REAR TEMPERATURE/MODE CONTROL DIAL
CHARGING CYLINDER ..................................... 13 . (REAR) ............................................................... 28
.
PREPARATION ........................................................ 14 . RECIRCULATION () SWITCH ............................ 28 . M
Special Service Tools ............................................ 14 . DEFROSTER () SWITCH ................................... 28 .
HFC-134a (R-134a) Service Tools and Equipment 14 ... REAR WINDOW DEFOGGER SWITCH ............ 28 .
Commercial Service Tools ..................................... 17 . OFF SWITCH ..................................................... 28 .
REFRIGERATION SYSTEM .................................... 18 . A/C SWITCH ...................................................... 28 .
Refrigerant Cycle .................................................. 18 . MODE SWITCHES ............................................. 29 .
REFRIGERANT FLOW ...................................... 18 . FRONT BLOWER CONTROL DIAL ................... 29 .
Refrigerant System Protection .............................. 18 . REAR BLOWER CONTROL DIAL (FRONT) ...... 29 .
REFRIGERANT PRESSURE SENSOR ............ 18 . REAR BLOWER CONTROL DIAL (REAR) ........ 29 .
PRESSURE RELIEF VALVE ............................. 19 . Discharge Air Flow ................................................ 29 .
Component Layout ................................................ 20 . FRONT ............................................................... 29
.
FRONT REFRIGERATION SYSTEM ................. 20 . REAR ................................................................. 29
.
REAR REFRIGERATION SYSTEM ................... 21 . System Description ................................................ 30 .
OIL ........................................................................... 22
. SWITCHES AND THEIR CONTROL FUNCTION 30 ...
Maintenance of Oil Quantity in Compressor ......... 22 . CAN Communication System Description ............. 31 .
OIL ..................................................................... 22
. TROUBLE DIAGNOSIS ........................................... 32 .
CHECKING AND ADJUSTING .......................... 22 . CONSULT-II Function (HVAC) ............................... 32 .
Revision: March 2006 ATC-1 2007 Quest
CONSULT-II START PROCEDURE ................... 32 . Intake Door Motor Circuit .......................................86 .
SELF-DIAGNOSIS ............................................. 32 . INSPECTION FLOW ...........................................86 .
DATA MONITOR ................................................. 33 . SYSTEM DESCRIPTION ....................................87 .
CONSULT-II Function (BCM) ................................. 35 . COMPONENT DESCRIPTION ...........................88 .
CONSULT-II START PROCEDURE ................... 35 . DIAGNOSTIC PROCEDURE FOR INTAKE
DATA MONITOR ................................................. 35 . DOOR MOTOR (DRIVER) ..................................88 .
How to Perform Trouble Diagnosis for Quick and DIAGNOSTIC PROCEDURE FOR INTAKE
Accurate Repair ..................................................... 36 . DOOR MOTOR (PASSENGER) .........................90 .
WORK FLOW ..................................................... 36 . Defroster Door Motor Circuit ..................................92 .
SYMPTOM TABLE ............................................. 36 . SYMPTOM: .........................................................92 .
Component Parts and Harness Connector Location 38 ... INSPECTION FLOW ...........................................92 .
ENGINE COMPARTMENT ................................. 38 . SYSTEM DESCRIPTION ....................................93 .
FRONT PASSENGER COMPARTMENT ........... 39 . COMPONENT DESCRIPTION ...........................93 .
REAR PASSENGER COMPARTMENT .............. 41 . DIAGNOSTIC PROCEDURE FOR
Schematic .............................................................. 42 . DEFROSTER DOOR MOTOR ............................94 .
Wiring Diagram -- A/C,A -- .................................. 43 . Front Blower Motor Circuit .....................................96 .
Front Air Control Terminals and Reference Value... 51 INSPECTION FLOW ...........................................96 .
FRONT AIR CONTROL HARNESS CONNEC- SYSTEM DESCRIPTION ....................................97 .
TOR TERMINAL LAYOUT .................................. 51 . COMPONENT DESCRIPTION ...........................98 .
TERMINALS AND REFERENCE VALUES FOR DIAGNOSTIC PROCEDURE FOR BLOWER
FRONT AIR CONTROL ...................................... 51 . MOTOR ...............................................................98.
A/C System Self-diagnosis Function ..................... 53 . COMPONENT INSPECTION ............................ 103 .
DESCRIPTION ................................................... 53 . Rear Blower Motor Circuit .................................... 105 .
Operational Check (Front) ..................................... 55 . INSPECTION FLOW ......................................... 105 .
CHECKING MEMORY FUNCTION .................... 55 . SYSTEM DESCRIPTION .................................. 107 .
CHECKING BLOWER ........................................ 55 . COMPONENT DESCRIPTION ......................... 107 .
CHECKING DISCHARGE AIR ........................... 55 . TROUBLE DIAGNOSIS PROCEDURE 1 ......... 108 .
CHECKING RECIRCULATION ........................... 55 . TROUBLE DIAGNOSIS PROCEDURE 2 ......... 109 .
CHECKING TEMPERATURE DECREASE ........ 55 . TROUBLE DIAGNOSIS PROCEDURE 3 ......... 110 .
CHECKING TEMPERATURE INCREASE ......... 56 . TROUBLE DIAGNOSIS PROCEDURE 4 ......... 115 .
CHECK A/C SWITCH ......................................... 56 . COMPONENT INSPECTION ............................ 116 .
CHECKING AUTO MODE .................................. 56 . Rear Air Temperature Control Circuit ................... 118 .
Operational Check (Rear) ...................................... 57 . INSPECTION FLOW ......................................... 118 .
CHECKING REAR BLOWER MOTOR ............... 57 . SYSTEM DESCRIPTION .................................. 119 .
CHECKING REAR DISCHARGE AIR ................ 57 . DIAGNOSTIC PROCEDURE FOR REAR AIR
CHECKING REAR TEMPERATURE CONTROL (FRONT) ......................................... 119 .
DECREASE ........................................................ 57 . DIAGNOSTIC PROCEDURE FOR REAR AIR
CHECKING REAR TEMPERATURE INCREASE 58 ... CONTROL (REAR) ........................................... 122 .
Power Supply and Ground Circuit for Front Air Con- Magnet Clutch Circuit ........................................... 124 .
trol .......................................................................... 59
. INSPECTION FLOW ......................................... 124 .
INSPECTION FLOW .......................................... 59 . SYSTEM DESCRIPTION .................................. 125 .
COMPONENT DESCRIPTION ........................... 60 . DIAGNOSTIC PROCEDURE FOR MAGNET
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 60 ... CLUTCH ........................................................... 125 .
Mode Door Motor Circuit ....................................... 62 . Insufficient Cooling ............................................... 130 .
INSPECTION FLOW .......................................... 62 . INSPECTION FLOW ......................................... 130 .
SYSTEM DESCRIPTION ................................... 64 . PERFORMANCE TEST DIAGNOSES ............. 132 .
COMPONENT DESCRIPTION ........................... 65 . PERFORMANCE CHART ................................. 134 .
DIAGNOSTIC PROCEDURE FOR MODE TROUBLE DIAGNOSES FOR UNUSUAL PRES-
DOOR MOTOR .................................................. 65 . SURE ................................................................ 135
.
Air Mix Door Motor Circuit ..................................... 70 . Insufficient Heating .............................................. 138 .
INSPECTION FLOW .......................................... 70 . INSPECTION FLOW ......................................... 138 .
SYSTEM DESCRIPTION ................................... 72 . Heater Pump Circuit ............................................. 140 .
COMPONENT DESCRIPTION ........................... 73 . SYSTEM DESCRIPTION .................................. 140 .
DIAGNOSTIC PROCEDURE FOR AIR MIX DIAGNOSTIC PROCEDURE FOR HEATER
DOOR MOTOR (DRIVER) .................................. 73 . PUMP CIRCUIT ................................................ 141 .
DIAGNOSTIC PROCEDURE FOR AIR MIX COMPONENT INSPECTION ............................ 142 .
DOOR MOTOR (PASSENGER) ......................... 77 . Noise .................................................................... 143
.
DIAGNOSTIC PROCEDURE FOR AIR MIX INSPECTION FLOW ......................................... 143 .
DOOR MOTOR (REAR) ..................................... 81 . Self-diagnosis ...................................................... 145.
Revision: March 2006 ATC-2 2007 Quest
INSPECTION FLOW ........................................ 145 . BLY ................................................................... 171
.
Memory Function ................................................ 147 . HEATER CORE ...................................................... 172 . A
INSPECTION FLOW ........................................ 147 . Components ........................................................ 172.
Ambient Sensor Circuit ....................................... 148 . Removal and Installation ..................................... 173 .
COMPONENT DESCRIPTION ........................ 148 . FRONT HEATER CORE .................................. 173 . B
AMBIENT TEMPERATURE INPUT PROCESS. 148 REAR HEATER CORE ..................................... 174 .
DIAGNOSTIC PROCEDURE FOR AMBIENT HEATER PUMP ...................................................... 175 .
SENSOR .......................................................... 148 . Removal and Installation ..................................... 175 .
COMPONENT INSPECTION ........................... 150 . REMOVAL ........................................................ 175 . C
In-vehicle Sensor Circuit ..................................... 151 . INSTALLATION ................................................ 175 .
COMPONENT DESCRIPTION ........................ 151 . DEFROSTER DOOR MOTOR ............................... 176 .
DIAGNOSTIC PROCEDURE FOR IN-VEHICLE Removal and Installation ..................................... 176 . D
SENSOR .......................................................... 152 . REMOVAL ........................................................ 176 .
COMPONENT INSPECTION ........................... 154 . INSTALLATION ................................................ 176 .
Optical Sensor Circuit ......................................... 155 . INTAKE DOOR MOTOR ........................................ 177 . E
COMPONENT DESCRIPTION ........................ 155 . Components ........................................................ 177.
OPTICAL INPUT PROCESS ........................... 155 . Removal and Installation ..................................... 178 .
DIAGNOSTIC PROCEDURE FOR OPTICAL DRIVER SIDE .................................................. 178 .
SENSOR .......................................................... 155 . PASSENGER SIDE .......................................... 179 . F
Intake Sensor Circuit ........................................... 158 . MODE DOOR MOTOR ........................................... 180 .
COMPONENT DESCRIPTION ........................ 158 . Removal and Installation ..................................... 180 .
DIAGNOSTIC PROCEDURE FOR INTAKE SEN- REMOVAL ........................................................ 180 . G
SOR ................................................................. 158
. INSTALLATION ................................................ 181 .
COMPONENT INSPECTION ........................... 159 . AIR MIX DOOR MOTOR ........................................ 182 .
CONTROL UNIT .................................................... 160 . Components ........................................................ 182. H
Removal and Installation ..................................... 160 . Removal and Installation ..................................... 183 .
FRONT AIR CONTROL ................................... 160 . FRONT AIR MIX DOOR MOTOR (DRIVER) .... 183 .
REAR AIR CONTROL (FRONT) ...................... 160 . FRONT AIR MIX DOOR MOTOR (PASSENGER) 184 .
I
REAR AIR CONTROL (REAR) ........................ 160 . REAR AIR MIX DOOR MOTOR ....................... 184 .
AMBIENT SENSOR ............................................... 162 . VARIABLE BLOWER CONTROL .......................... 185 .
Removal and Installation ..................................... 162 . Components ........................................................ 185.
REMOVAL ........................................................ 162 . Removal and Installation ..................................... 186 . ATC
INSTALLATION ................................................ 162 . VARIABLE BLOWER CONTROL (FRONT) ..... 186 .
IN-VEHICLE SENSOR ........................................... 163 . VARIABLE BLOWER CONTROL (REAR) ........ 186 .
Removal and Installation ..................................... 163 . DUCTS AND GRILLES .......................................... 187 . K
REMOVAL ........................................................ 163 . Components ........................................................ 187.
INSTALLATION ................................................ 163 . Removal and Installation ..................................... 190 .
OPTICAL SENSOR ............................................... 164 . DEFROSTER NOZZLE .................................... 190 .
L
Removal and Installation ..................................... 164 . FRESH AIR DUCT ........................................... 190 .
INTAKE SENSOR .................................................. 165 . DEFROSTER DUCT ........................................ 190 .
Removal and Installation ..................................... 165 . RH AND LH SIDE DEMISTER DUCT .............. 190 .
REMOVAL ........................................................ 165 . RH, LH, AND CENTER VENTILATOR DUCT .. 190 . M
INSTALLATION ................................................ 165 . FLOOR CONNECTOR DUCT .......................... 190 .
BLOWER MOTOR ................................................. 166 . FLOOR DISTRIBUTION DUCT ........................ 191 .
Components ........................................................ 166 . FLOOR JUNCTION DUCT ............................... 191 .
Removal and Installation ..................................... 167 . FLOOR JUNCTION DUCT EXTENSION ......... 191 .
FRONT BLOWER MOTOR .............................. 167 . FLOOR DUCT .................................................. 191 .
REAR BLOWER MOTOR ................................ 167 . REAR OVERHEAD DUCT ............................... 191 .
IN-CABIN MICROFILTER ...................................... 168 . REAR FLOOR DUCT ....................................... 191 .
Removal and Installation ..................................... 168 . GRILLES .......................................................... 191.
FUNCTION ....................................................... 168 . REFRIGERANT LINES .......................................... 193 .
REPLACEMENT TIMING ................................. 168 . HFC-134a (R-134a) Service Procedure .............. 193 .
REPLACEMENT PROCEDURES .................... 168 . SETTING OF SERVICE TOOLS AND EQUIP-
HEATER & COOLING UNIT ASSEMBLY ............. 169 . MENT ............................................................... 193
.
Components ........................................................ 169 . Components ........................................................ 195.
Removal and Installation ..................................... 170 . Removal and Installation for Compressor ........... 197 .
FRONT HEATER AND COOLING UNIT ASSEM- REMOVAL ........................................................ 197 .
BLY ................................................................... 170
. INSTALLATION ................................................ 197 .
REAR HEATER AND COOLING UNIT ASSEM- Removal and Installation for Compressor Clutch . 198
Revision: March 2006 ATC-3 2007 Quest
REMOVAL ........................................................ 198 . REMOVAL ......................................................... 208 .
INSPECTION .................................................... 199 . INSTALLATION ................................................. 209 .
INSTALLATION ................................................. 199 . Removal and Installation for Rear Evaporator ..... 210 .
BREAK-IN OPERATION ................................... 201 . REMOVAL ......................................................... 210 .
Removal and Installation for Low-pressure Flexible INSTALLATION ................................................. 211 .
Hose .................................................................... 201
. Removal and Installation for Front Expansion Valve. 211
REMOVAL ........................................................ 201 . REMOVAL ......................................................... 211 .
INSTALLATION ................................................. 201 . INSTALLATION ................................................. 211 .
Removal and Installation for High-pressure Flexible Removal and Installation for Rear Expansion Valve. 211
Hose .................................................................... 201
. REMOVAL ......................................................... 211 .
REMOVAL ........................................................ 201 . INSTALLATION ................................................. 211 .
INSTALLATION ................................................. 201 . Checking for Refrigerant Leaks ........................... 212 .
Removal and Installation for High-pressure Pipe . 202 Checking System for Leaks Using the Fluorescent
REMOVAL ........................................................ 202 . Dye Leak Detector ............................................... 212 .
INSTALLATION ................................................. 202 . Dye Injection ........................................................ 212
.
Removal and Installation for High/Low-pressure Electronic Refrigerant Leak Detector ................... 213 .
Pipe ..................................................................... 202
. PRECAUTIONS FOR HANDLING LEAK
REMOVAL ........................................................ 202 . DETECTOR ...................................................... 213 .
INSTALLATION ................................................. 204 . CHECKING PROCEDURE ............................... 214 .
Removal and Installation for Refrigerant Pressure SERVICE DATA AND SPECIFICATIONS (SDS) ... 216 .
Sensor ................................................................. 206
. Service Data and Specifications (SDS) ............... 216 .
REMOVAL ........................................................ 206 . COMPRESSOR ................................................ 216 .
INSTALLATION ................................................. 206 . OIL .................................................................... 216
.
Removal and Installation for Condenser .............. 206 . REFRIGERANT ................................................ 216 .
REMOVAL ........................................................ 206 . ENGINE IDLING SPEED .................................. 216 .
INSTALLATION ................................................. 207 . BELT TENSION ................................................ 216 .
Removal and Installation for Front Evaporator .... 208 .
Revision: March 2006 ATC-4 2007 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
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) EJS004J6
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 recov-
ery/recycling equipment and refrigerant identifier. I
G 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.
G 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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