Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Armada 2004-2009 Approved Nissan Armada 2007 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 ............................. 25 . G
Precautions for Working with HFC-134a (R-134a) 5 ..... BLOWER SPEED CONTROL ............................ 25 .
Contaminated Refrigerant ....................................... 5 . INTAKE DOOR CONTROL ................................ 25 .
General Refrigerant Precautions ............................. 6 . MODE DOOR CONTROL .................................. 25 .
H
Precautions for Leak Detection Dye ........................ 6 . DEFROSTER DOOR CONTROL ....................... 25 .
A/C Identification Label ........................................... 6 . MAGNET CLUTCH CONTROL .......................... 26 .
Precautions for Refrigerant Connection .................. 6 . SELF-DIAGNOSTIC SYSTEM ........................... 26 .
FEATURES OF NEW TYPE REFRIGERANT Description of Control System ............................... 27 . I
CONNECTION ..................................................... 7 . Control Operation .................................................. 27
.
O-RING AND REFRIGERANT CONNECTION..... 8 DISPLAY SCREEN ............................................. 28 .
Precautions for Servicing Compressor ...................11 . AUTO SWITCH .................................................. 28 . ATC
Precautions for Service Equipment ........................11 . TEMPERATURE CONTROL DIAL (TEMPERA-
RECOVERY/RECYCLING EQUIPMENT ............11 . TURE CONTROL) (DRIVER SIDE) .................... 28 .
ELECTRONIC LEAK DETECTOR ......................11 . TEMPERATURE CONTROL DIAL (TEMPERA-
K
VACUUM PUMP ................................................ 12 . TURE CONTROL) (PASSENGER SIDE) ........... 28 .
MANIFOLD GAUGE SET ................................... 12 . TEMPERATURE CONTROL DIAL (TEMPERA-
SERVICE HOSES .............................................. 12 . TURE AND MODE CONTROL) (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 SWITCH (FRONT) .................................. 28 .
Commercial Service Tools ..................................... 17 . FRONT BLOWER CONTROL DIAL ................... 28 .
REFRIGERATION SYSTEM .................................... 18 . TEMPERATURE CONTROL DIAL (TEMPERA-
Refrigerant Cycle .................................................. 18 . TURE AND MODE CONTROL) .......................... 29 .
REFRIGERANT FLOW ...................................... 18 . REAR BLOWER CONTROL DIAL ..................... 29 .
Refrigerant System Protection .............................. 18 . Discharge Air Flow ................................................ 30.
REFRIGERANT PRESSURE SENSOR ............ 18 . FRONT ............................................................... 30
.
PRESSURE RELIEF VALVE .............................. 19 . REAR ................................................................. 30
.
Component Layout ................................................ 20 . System Description (Front) .................................... 31 .
FRONT REFRIGERATION SYSTEM ................. 20 . SWITCHES AND THEIR CONTROL FUNCTION 31 ...
REAR REFRIGERATION SYSTEM ................... 21 . System Description (Rear) .................................... 32 .
OIL ........................................................................... 22
. SWITCHES AND THEIR CONTROL FUNCTION 32 ...
Maintenance of Oil Quantity in Compressor ......... 22 . CAN Communication System Description ............. 33 .
OIL ..................................................................... 22
. TROUBLE DIAGNOSIS ........................................... 34 .
CHECKING AND ADJUSTING .......................... 22 . CONSULT-II Function (HVAC) ............................... 34 .
Revision: August 2006 ATC-1 2007 Armada
CONSULT-II START PROCEDURE ................... 34 . DIAGNOSTIC PROCEDURE FOR AIR MIX
SELF-DIAGNOSIS ............................................. 34 . DOOR MOTOR (PASSENGER) .........................97 .
DATA MONITOR ................................................. 34 . DIAGNOSTIC PROCEDURE FOR AIR MIX
CONSULT-II Function (BCM) ................................. 36 . DOOR MOTOR (REAR) ................................... 104 .
CONSULT-II START PROCEDURE ................... 36 . Intake Door Motor Circuit ..................................... 111 .
DATA MONITOR ................................................. 36 . INSPECTION FLOW ......................................... 111 .
How to Perform Trouble Diagnosis for Quick and SYSTEM DESCRIPTION .................................. 112 .
Accurate Repair ..................................................... 36 . COMPONENT DESCRIPTION ......................... 113 .
WORK FLOW ..................................................... 36 . DIAGNOSTIC PROCEDURE FOR INTAKE
SYMPTOM TABLE ............................................. 36 . DOOR MOTOR ................................................. 113 .
Component Parts and Harness Connector Location 38 ... Defroster Door Motor Circuit ................................ 116 .
ENGINE COMPARTMENT ................................. 38 . SYMPTOM: ....................................................... 116 .
FRONT PASSENGER COMPARTMENT ........... 39 . INSPECTION FLOW ......................................... 116 .
REAR PASSENGER COMPARTMENT .............. 40 . SYSTEM DESCRIPTION .................................. 117 .
Schematic .............................................................. 41 . COMPONENT DESCRIPTION ......................... 117 .
WITH NAVI ......................................................... 41 . DIAGNOSTIC PROCEDURE FOR
WITHOUT NAVI .................................................. 42 . DEFROSTER DOOR MOTOR .......................... 118 .
Wiring Diagram -- A/C,A -- .................................. 43 . Front Blower Motor Circuit ................................... 125 .
WITH NAVI ......................................................... 43 . INSPECTION FLOW ......................................... 125 .
WITHOUT NAVI .................................................. 53 . SYSTEM DESCRIPTION .................................. 126 .
Front Air Control Terminals and Reference Values... 63 COMPONENT DESCRIPTION ......................... 127 .
FRONT AIR CONTROL HARNESS CONNEC- DIAGNOSTIC PROCEDURE FOR BLOWER
TOR TERMINAL LAYOUT .................................. 63 . MOTOR ............................................................. 127.
TERMINALS AND RERERENCE VALUES FOR COMPONENT INSPECTION ............................ 136 .
FRONT AIR CONTROL (WITH NAVI) ................ 63 . Rear Blower Motor Circuit .................................... 137 .
TERMINALS AND REFERENCE VALUES FOR INSPECTION FLOW ......................................... 137 .
FRONT AIR CONTROL (WITHOUT NAVI) ........ 65 . SYSTEM DESCRIPTION .................................. 138 .
A/C System Self-diagnosis Function ..................... 67 . DIAGNOSTIC PROCEDURE FOR REAR
DESCRIPTION ................................................... 67 . BLOWER MOTOR ............................................ 138 .
Operational Check (Front) ..................................... 69 . COMPONENT INSPECTION ............................ 146 .
CHECKING MEMORY FUNCTION .................... 69 . Rear Air Control Circuit ........................................ 148 .
CHECKING BLOWER ........................................ 69 . INSPECTION FLOW ......................................... 148 .
CHECKING DISCHARGE AIR ........................... 69 . SYSTEM DESCRIPTION .................................. 149 .
CHECKING RECIRCULATION (, ONLY) ............ 69 . DIAGNOSTIC PROCEDURE FOR REAR AIR
CHECKING TEMPERATURE DECREASE ........ 69 . CONTROL ........................................................ 149 .
CHECKING TEMPERATURE INCREASE ......... 70 . Magnet Clutch Circuit ........................................... 151 .
CHECK A/C SWITCH ......................................... 70 . INSPECTION FLOW ......................................... 151 .
CHECKING AUTO MODE .................................. 70 . SYSTEM DESCRIPTION .................................. 152 .
Operational Check (Rear) ...................................... 71 . DIAGNOSTIC PROCEDURE FOR MAGNET
CHECKING BLOWER ........................................ 71 . CLUTCH ........................................................... 152 .
CHECKING TEMPERATURE DECREASE ........ 71 . Insufficient Cooling ............................................... 160 .
CHECKING TEMPERATURE INCREASE ......... 71 . INSPECTION FLOW ......................................... 160 .
Power Supply and Ground Circuit for Front Air Con- PERFORMANCE TEST DIAGNOSES ............. 162 .
trol .......................................................................... 72
. PERFORMANCE CHART ................................. 164 .
INSPECTION FLOW .......................................... 72 . TROUBLE DIAGNOSES FOR UNUSUAL PRES-
COMPONENT DESCRIPTION ........................... 73 . SURE ................................................................ 165
.
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 73 ... Insufficient Heating .............................................. 168 .
Mode Door Motor Circuit ....................................... 76 . INSPECTION FLOW ......................................... 168 .
INSPECTION FLOW .......................................... 76 . Noise .................................................................... 170
.
SYSTEM DESCRIPTION ................................... 78 . INSPECTION FLOW ......................................... 170 .
COMPONENT DESCRIPTION ........................... 79 . Self-diagnosis ...................................................... 172.
DIAGNOSTIC PROCEDURE FOR MODE INSPECTION FLOW ......................................... 172 .
DOOR MOTOR .................................................. 79 . Memory Function ................................................. 174 .
Air Mix Door Motor Circuit ..................................... 86 . INSPECTION FLOW ......................................... 174 .
INSPECTION FLOW .......................................... 86 . Water Valve Circuit ............................................... 175 .
SYSTEM DESCRIPTION ................................... 88 . COMPONENT DESCRIPTION ......................... 175 .
COMPONENT DESCRIPTION ........................... 89 . DIAGNOSTIC PROCEDURE FOR WATER
DIAGNOSTIC PROCEDURE FOR AIR MIX VALVE ............................................................... 175
.
DOOR MOTOR (DRIVER) .................................. 89 . Ambient Sensor Circuit ........................................ 178 .
Revision: August 2006 ATC-2 2007 Armada
COMPONENT DESCRIPTION ........................ 178 . Components ........................................................ 206 .
AMBIENT TEMPERATURE INPUT PROCESS. 178 Removal and Installation ..................................... 207 . A
DIAGNOSTIC PROCEDURE FOR AMBIENT FRONT HEATER CORE .................................. 207 .
SENSOR .......................................................... 178 . REAR HEATER CORE ..................................... 208 .
COMPONENT INSPECTION ........................... 181 . DEFROSTER DOOR MOTOR ............................... 209 . B
In-vehicle Sensor Circuit ..................................... 182 . Removal and Installation ..................................... 209 .
COMPONENT DESCRIPTION ........................ 182 . REMOVAL ........................................................ 209 .
DIAGNOSTIC PROCEDURE FOR IN-VEHICLE INSTALLATION ................................................ 209 .
SENSOR .......................................................... 183 . INTAKE DOOR MOTOR ........................................ 210 . C
COMPONENT INSPECTION ........................... 186 . Removal and Installation ..................................... 210 .
Optical Sensor Circuit ......................................... 187 . REMOVAL ........................................................ 210 .
COMPONENT DESCRIPTION ........................ 187 . INSTALLATION ................................................ 210 . D
OPTICAL INPUT PROCESS ........................... 187 . MODE DOOR MOTOR ........................................... 211 .
DIAGNOSTIC PROCEDURE FOR OPTICAL Removal and Installation ..................................... 211 .
SENSOR .......................................................... 187 . REMOVAL ........................................................ 211 . E
Intake Sensor Circuit ........................................... 190 . INSTALLATION ................................................ 211 .
COMPONENT DESCRIPTION ........................ 190 . AIR MIX DOOR MOTOR ........................................ 212 .
DIAGNOSTIC PROCEDURE FOR INTAKE SEN- Components ........................................................ 212 .
SOR ................................................................. 190
. Removal and Installation ..................................... 212 . F
COMPONENT INSPECTION ........................... 193 . FRONT AIR MIX DOOR MOTOR (DRIVER) .... 212 .
CONTROL UNIT .................................................... 194 . FRONT AIR MIX DOOR MOTOR (PASSENGER) 213 .
Removal and Installation ..................................... 194 . REAR AIR MIX DOOR MOTOR ....................... 213 . G
FRONT AIR CONTROL ................................... 194 . VARIABLE BLOWER CONTROL .......................... 214 .
REAR AIR CONTROL ...................................... 194 . Removal and Installation ..................................... 214 .
AMBIENT SENSOR ............................................... 195 . REMOVAL ........................................................ 214 . H
Removal and Installation ..................................... 195 . INSTALLATION ................................................ 214 .
REMOVAL ........................................................ 195 . REAR BLOWER MOTOR RESISTOR ................... 215 .
INSTALLATION ................................................ 195 . Removal and Installation ..................................... 215 .
I
IN-VEHICLE SENSOR ........................................... 196 . REMOVAL ........................................................ 215 .
Removal and Installation ..................................... 196 . INSTALLATION ................................................ 215 .
REMOVAL ........................................................ 196 . DUCTS AND GRILLES .......................................... 216 .
INSTALLATION ................................................ 196 . Components ........................................................ 216 . ATC
OPTICAL SENSOR ............................................... 197 . Removal and Installation ..................................... 219 .
Removal and Installation ..................................... 197 . CENTER CONSOLE HEAT DUCT AND REAR
INTAKE SENSOR .................................................. 198 . FINISHER ASSEMBLY GRILLE ....................... 219 . K
Removal and Installation ..................................... 198 . DEFROSTER NOZZLE .................................... 219 .
REMOVAL ........................................................ 198 . RH AND LH SIDE DEMISTER DUCT .............. 219 .
INSTALLATION ................................................ 198 . RH AND LH VENTILATOR DUCT .................... 219 . L
BLOWER MOTOR ................................................. 199 . CENTER VENTILATOR DUCT ........................ 219 .
Components ........................................................ 199 . FLOOR DUCT .................................................. 219 .
Removal and Installation ..................................... 199 . REAR OVERHEAD DUCTS ............................. 220 .
FRONT BLOWER MOTOR .............................. 199 . REAR FLOOR DUCT ....................................... 220 . M
REAR BLOWER MOTOR ................................ 200 . GRILLES .......................................................... 220 .
IN-CABIN MICROFILTER ...................................... 201 . REFRIGERANT LINES .......................................... 221 .
Removal and Installation ..................................... 201 . HFC-134a (R-134a) Service Procedure .............. 221 .
FUNCTION ....................................................... 201 . SETTING OF SERVICE TOOLS AND EQUIP-
REPLACEMENT TIMING ................................. 201 . MENT ............................................................... 221
.
REPLACEMENT PROCEDURE ...................... 201 . Components ........................................................ 223 .
HEATER & COOLING UNIT ASSEMBLY ............. 203 . Removal and Installation for Compressor ........... 225 .
Components ........................................................ 203 . REMOVAL ........................................................ 225 .
Removal and Installation ..................................... 204 . INSTALLATION ................................................ 226 .
FRONT HEATER AND COOLING UNIT ASSEM- Removal and Installation for Compressor Clutch . 226
BLY ................................................................... 204
. REMOVAL ........................................................ 226 .
REAR HEATER AND COOLING UNIT ASSEM- INSPECTION ................................................... 227 .
BLY ................................................................... 205
. INSTALLATION ................................................ 227 .
HEATER CORE ..................................................... 206 . BREAK-IN OPERATION ................................... 229 .
Removal and Installation for Low-pressure Flexible
Hose .................................................................... 229
.
REMOVAL ........................................................ 229 .
Revision: August 2006 ATC-3 2007 Armada
INSTALLATION ................................................. 229 . INSTALLATION ................................................. 234 .
Removal and Installation for High-pressure Flexible Removal and Installation for Front Expansion Valve .234
Hose .................................................................... 229
. REMOVAL ......................................................... 234 .
REMOVAL ........................................................ 229 . INSTALLATION ................................................. 234 .
INSTALLATION ................................................. 229 . Removal and Installation for Rear Expansion Valve.234
Removal and Installation for High-pressure Pipe . 229 REMOVAL ......................................................... 234 .
REMOVAL ........................................................ 229 . INSTALLATION ................................................. 235 .
INSTALLATION ................................................. 229 . Checking for Refrigerant Leaks ........................... 235 .
Removal and Installation for Low-pressure Pipe . 230 PRELIMINARY CHECK .................................... 235 .
REMOVAL ........................................................ 230 . Checking System for Leaks Using the Fluorescent
INSTALLATION ................................................. 230 . Dye Leak Detector ............................................... 235 .
Removal and Installation for Refrigerant Pressure Dye Injection ........................................................ 235
.
Sensor ................................................................. 230
. Electronic Refrigerant Leak Detector ................... 236 .
REMOVAL ........................................................ 230 . PRECAUTIONS FOR HANDLING LEAK
INSTALLATION ................................................. 230 . DETECTOR ...................................................... 236 .
Removal and Installation for Condenser .............. 230 . CHECKING PROCEDURE ............................... 237 .
REMOVAL ........................................................ 230 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 239 .
INSTALLATION ................................................. 231 . Service Data and Specifications (SDS) ............... 239 .
Removal and Installation for Front Evaporator .... 232 . COMPRESSOR ................................................ 239 .
REMOVAL ........................................................ 232 . OIL .................................................................... 239
.
INSTALLATION ................................................. 233 . REFRIGERANT ................................................ 239 .
Removal and Installation for Rear Evaporator ..... 233 . ENGINE IDLING SPEED .................................. 239 .
REMOVAL ........................................................ 234 . BELT TENSION ................................................ 239 .
Revision: August 2006 ATC-4 2007 Armada
PRECAUTIONS
PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS005D7
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) EJS005D8
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 to ATC-5, "Contaminated Refrigerant" . To
determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use recovery/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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