Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Frontier 2006-2009 Approved Nissan Frontier 2007 MTC
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J AIR CONDITIONER
A
SECTION
MANUAL AIR CONDITIONER
MTC B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 4 . Description ............................................................. 22
. F
Precautions for Supplemental Restraint System Operation ............................................................... 22
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- AIR MIX DOOR CONTROL ................................ 22 .
SIONER" ................................................................. 4. BLOWER SPEED CONTROL ............................ 22 . G
Precautions for Working with HFC-134a (R-134a) 4 ..... INTAKE DOORS CONTROL .............................. 22 .
Contaminated Refrigerant ....................................... 4 . MODE DOOR CONTROL .................................. 22 .
General Refrigerant Precautions ............................. 5 . DEFROSTER DOOR CONTROL ....................... 22 .
H
Precautions for Leak Detection Dye ........................ 5 . MAGNET CLUTCH CONTROL .......................... 22 .
A/C Identification Label ........................................... 5 . Description of Control System ............................... 24 .
Precautions for Refrigerant Connection .................. 6 . Control Operation .................................................. 25 .
FEATURES OF NEW TYPE REFRIGERANT TEMPERATURE CONTROL DIAL (TEMPERA- I
CONNECTION ..................................................... 6 . TURE CONTROL) .............................................. 25 .
O-RING AND REFRIGERANT CONNECTION ..... 7 RECIRCULATION () SWITCH ............................ 25 .
Precautions for Servicing Compressor .................... 9 . DEFROSTER SWITCH ...................................... 25 . MTC
Precautions for Service Equipment ......................... 9 . REAR WINDOW DEFOGGER SWITCH (IF
RECOVERY/RECYCLING EQUIPMENT ............. 9 . EQUIPPED) ........................................................ 25 .
ELECTRONIC LEAK DETECTOR ....................... 9 . OFF SWITCH (BLOWER SPEED SET TO 0) .... 25 .
K
VACUUM PUMP ................................................ 10 . A/C SWITCH (IF EQUIPPED) ............................ 25 .
MANIFOLD GAUGE SET ................................... 10 . MODE DIAL ........................................................ 25 .
SERVICE HOSES .............................................. 10 . BLOWER CONTROL DIAL ................................ 25 .
SERVICE COUPLERS ........................................11 . Discharge Air Flow ................................................ 26 . L
REFRIGERANT WEIGHT SCALE ......................11 . ........................................................................... 26
.
CHARGING CYLINDER ......................................11 . DISCHARGE AIR FLOW .................................... 26 .
PREPARATION ........................................................ 12 . System Description ................................................ 27 . M
Special Service Tools ............................................ 12 . SWITCHES AND THEIR CONTROL FUNCTION 27 ...
HFC-134a (R-134a) Service Tools and Equipment 12 ... TROUBLE DIAGNOSIS ........................................... 28 .
Commercial Service Tools ..................................... 15 . CONSULT-II Function (BCM) ................................ 28 .
REFRIGERATION SYSTEM .................................... 16 . CONSULT-II START PROCEDURE ................... 28 .
Refrigerant Cycle .................................................. 16 . DATA MONITOR ................................................ 28 .
REFRIGERANT FLOW ...................................... 16 . How to Perform Trouble Diagnosis for Quick and
FREEZE PROTECTION .................................... 16 . Accurate Repair ..................................................... 28 .
Refrigerant System Protection .............................. 16 . WORK FLOW ..................................................... 28 .
REFRIGERANT PRESSURE SENSOR ............ 16 . SYMPTOM TABLE ............................................. 28 .
PRESSURE RELIEF VALVE .............................. 16 . Component Parts and Harness Connector Location 30 ...
Component Layout ................................................ 17 . ENGINE COMPARTMENT ................................. 30 .
OIL ........................................................................... 19
. PASSENGER COMPARTMENT ........................ 31 .
Maintenance of Oil Quantity in Compressor ......... 19 . Schematic .............................................................. 32.
OIL ..................................................................... 19
. Wiring Diagram -- HEATER -- ............................. 33 .
CHECKING AND ADJUSTING .......................... 19 . Wiring Diagram -- A/C,M -- .................................. 35 .
AIR CONDITIONER CONTROL .............................. 22 . Front Air Control Terminals and Reference Values 39 ...
Revision: September 2006 MTC-1 2007 Frontier
FRONT AIR CONTROL CONNECTOR TERMI- INSPECTION FLOW ...........................................78 .
NAL LAYOUT ..................................................... 39 . Noise ......................................................................80
.
TERMINALS AND REFERENCE VALUES FOR INSPECTION FLOW ...........................................80 .
FRONT AIR CONTROL ...................................... 39 . Intake Sensor Circuit ..............................................82 .
Operational Check ................................................. 41 . COMPONENT DESCRIPTION ...........................82 .
CHECKING BLOWER ........................................ 41 . DIAGNOSTIC PROCEDURE FOR INTAKE SEN-
CHECKING DISCHARGE AIR ........................... 41 . SOR ....................................................................82
.
CHECKING TEMPERATURE DECREASE ........ 41 . COMPONENT INSPECTION ..............................83 .
CHECKING TEMPERATURE INCREASE ......... 41 . CONTROL UNIT .......................................................84 .
CHECK A/C SWITCH (IF EQUIPPED) ............... 41 . Removal and Installation ........................................84 .
Power Supply and Ground Circuit for Front Air Con- FRONT AIR CONTROL ......................................84 .
trol .......................................................................... 42
. INTAKE SENSOR .....................................................85 .
INSPECTION FLOW .......................................... 42 . Removal and Installation ........................................85 .
COMPONENT DESCRIPTION ........................... 43 . REMOVAL ...........................................................85 .
COMPONENT DESCRIPTION ........................... 43 . INSTALLATION ...................................................85 .
DIAGNOSTIC PROCEDURE FOR HEATER/A/C BLOWER MOTOR ....................................................86 .
SYSTEM (IF EQUIPPED) ................................... 43 . Components ...........................................................86 .
Mode Door Motor Circuit ....................................... 45 . Removal and Installation ........................................86 .
INSPECTION FLOW .......................................... 45 . REMOVAL ...........................................................86 .
SYSTEM DESCRIPTION ................................... 46 . INSTALLATION ...................................................86 .
COMPONENT DESCRIPTION ........................... 46 . IN-CABIN MICROFILTER .........................................87 .
DIAGNOSTIC PROCEDURE FOR MODE Removal and Installation ........................................87 .
DOOR MOTOR .................................................. 47 . FUNCTION .........................................................87 .
Air Mix Door Motor Circuit ..................................... 49 . REPLACEMENT TIMING ...................................87 .
INSPECTION FLOW .......................................... 49 . REPLACEMENT PROCEDURE .........................87 .
SYSTEM DESCRIPTION ................................... 50 . HEATER & COOLING UNIT ASSEMBLY ................89 .
COMPONENT DESCRIPTION ........................... 50 . Components ...........................................................89 .
DIAGNOSTIC PROCEDURE FOR AIR MIX Removal and Installation ........................................89 .
DOOR MOTOR .................................................. 51 . REMOVAL ...........................................................89 .
Intake Door Motor Circuit ....................................... 53 . INSTALLATION ...................................................90 .
INSPECTION FLOW .......................................... 53 . HEATER CORE ........................................................91 .
SYSTEM DESCRIPTION ................................... 54 . Components ...........................................................91 .
COMPONENT DESCRIPTION ........................... 54 . Removal and Installation ........................................91 .
DIAGNOSTIC PROCEDURE FOR INTAKE REMOVAL ...........................................................91 .
DOOR MOTOR .................................................. 55 . INSTALLATION ...................................................91 .
Front Blower Motor Circuit ..................................... 57 . INTAKE DOOR MOTOR ...........................................92 .
INSPECTION FLOW .......................................... 57 . Removal and Installation ........................................92 .
SYSTEM DESCRIPTION ................................... 58 . REMOVAL ...........................................................92 .
COMPONENT DESCRIPTION ........................... 58 . INSTALLATION ...................................................92 .
DIAGNOSTIC PROCEDURE FOR BLOWER MODE DOOR MOTOR .............................................93 .
MOTOR .............................................................. 59 . Removal and Installation ........................................93 .
COMPONENT INSPECTION ............................. 63 . REMOVAL ...........................................................93 .
Magnet Clutch Circuit ............................................ 65 . INSTALLATION ...................................................93 .
INSPECTION FLOW .......................................... 65 . AIR MIX DOOR MOTOR ..........................................94 .
SYSTEM DESCRIPTION ................................... 66 . Components ...........................................................94 .
DIAGNOSTIC PROCEDURE FOR MAGNET Removal and Installation ........................................94 .
CLUTCH ............................................................. 66 . REMOVAL ...........................................................94 .
Insufficient Cooling ................................................ 70 . INSTALLATION ...................................................94 .
INSPECTION FLOW .......................................... 70 . FRONT BLOWER MOTOR RESISTOR ...................95 .
PERFORMANCE TEST DIAGNOSES ............... 72 . Removal and Installation ........................................95 .
PERFORMANCE CHART .................................. 74 . REMOVAL ...........................................................95 .
TROUBLE DIAGNOSES FOR UNUSUAL PRES- INSTALLATION ...................................................95 .
SURE .................................................................. 75. DUCTS AND GRILLES ............................................96 .
Insufficient Heating ................................................ 78 .
Revision: September 2006 MTC-2 2007 Frontier
Components .......................................................... 96 . REMOVAL ........................................................ 107 .
Removal and Installation ....................................... 97 . INSTALLATION ................................................ 107 . A
DEFROSTER NOZZLE ...................................... 97 . Removal and Installation for Low-pressure A/C Pipe 108 .
RH AND LH SIDE DEMISTER DUCTS ............. 98 . REMOVAL ........................................................ 108 .
RH AND LH VENTILATOR DUCTS ................... 98 . INSTALLATION ................................................ 108 . B
CENTER VENTILATOR DUCT .......................... 98 . Removal and Installation for Refrigerant Pressure
FLOOR CONNECTOR DUCT ............................ 98 . Sensor ................................................................. 108
.
FRONT AND REAR FLOOR DUCTS ................ 98 . REMOVAL ........................................................ 108 .
GRILLES ............................................................ 98. INSTALLATION ................................................ 108 . C
REFRIGERANT LINES ............................................ 99 . Removal and Installation for Condenser ............. 108 .
HFC-134a (R-134a) Service Procedure ................ 99 . REMOVAL ........................................................ 108 .
SETTING OF SERVICE TOOLS AND EQUIP- INSTALLATION ................................................ 109 . D
MENT ................................................................. 99
. Removal and Installation for Evaporator ............. 110 .
Components ........................................................ 101 . REMOVAL .........................................................111 .
Removal and Installation for Compressor ........... 102 . INSTALLATION .................................................111 . E
COMPONENTS ............................................... 102 . Removal and Installation for Expansion Valve ......111 .
REMOVAL ........................................................ 103 . REMOVAL .........................................................111 .
INSTALLATION ................................................ 103 . INSTALLATION .................................................111 .
Removal and Installation for Compressor Clutch . 104 Checking for Refrigerant Leaks ............................111 . F
REMOVAL ........................................................ 104 . Checking System for Leaks Using the Fluorescent
INSPECTION ................................................... 105 . Dye Leak Detector ................................................111 .
INSTALLATION ................................................ 105 . Dye Injection ........................................................ 112
. G
BREAK-IN OPERATION .................................. 107 . Electronic Refrigerant Leak Detector ................... 112 .
Removal and Installation for High-pressure Flexible PRECAUTIONS FOR HANDLING LEAK
A/C Hose ............................................................. 107
. DETECTOR ...................................................... 112 . H
REMOVAL ........................................................ 107 . CHECKING PROCEDURE .............................. 113 .
INSTALLATION ................................................ 107 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 115 .
Removal and Installation for High-pressure A/C Service Data and Specifications (SDS) ............... 115 .
I
Pipe ..................................................................... 107
. COMPRESSOR ............................................... 115 .
REMOVAL ........................................................ 107 . OIL .................................................................... 115
.
INSTALLATION ................................................ 107 . REFRIGERANT ................................................ 115 .
Removal and Installation for Low-pressure Flexible ENGINE IDLING SPEED ................................. 115 . MTC
A/C Hose ............................................................. 107
. BELT TENSION ................................................ 115 .
K
L
M
Revision: September 2006 MTC-3 2007 Frontier
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS003OA
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along
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.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
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.
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.
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.
Precautions for Working with HFC-134a (R-134a) EJS003OB
WARNING:
G CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants
are mixed compressor failure is likely to occur. Refer MTC-4, "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.
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
handling precautions must be observed:
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