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J AIR CONDITIONER
A
SECTION
MANUAL AIR CONDITIONER
MTC B
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CONTENTS
PRECAUTIONS ......................................................... 4
. OIL ............................................................................ 18
. F
Precautions for Supplemental Restraint System Maintenance of Oil Quantity in Compressor .......... 18 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- OIL ...................................................................... 18
.
SIONER" ................................................................. 4
. OIL RETURN OPERATION ................................ 18 . G
Precautions for Procedures without Cowl Top Cover 4 ..... OIL ADJUSTING PROCEDURE FOR COMPO-
Precautions for Working with HFC-134a (R-134a) 4 ..... NENTS REPLACEMENT EXCEPT COMPRES-
General Refrigerant Precautions ............................. 5 . SOR .................................................................... 19
.
H
Oil Precautions ........................................................ 5
. OIL ADJUSTING PROCEDURE FOR COM-
Precautions for Refrigerant Connection .................. 5 . PRESSOR REPLACEMENT .............................. 19 .
FEATURES OF NEW TYPE REFRIGERANT AIR CONDITIONER CONTROL .............................. 21 .
CONNECTION ..................................................... 5. Control Operation .................................................. 21 . I
O-RING AND REFRIGERANT CONNECTION ..... 6 BLOWER CONTROL DIAL ................................ 21 .
Precautions for Servicing Compressor .................... 8 . TEMPERATURE CONTROL DIAL ..................... 21 .
Precautions for Service Equipment ......................... 9 . MODE DOOR CONTROL DIAL ......................... 21 . MTC
RECOVERY/RECYCLING EQUIPMENT ............. 9 . INTAKE DOOR LEVER ...................................... 21 .
ELECTRONIC LEAK DETECTOR ....................... 9 . REAR WINDOW DEFOGGER SWITCH ............ 21 .
VACUUM PUMP .................................................. 9 . A/C SWITCH (IF EQUIPPED) ............................ 21 .
K
MANIFOLD GAUGE SET ..................................... 9 . Discharge Air Flow ................................................ 22 .
SERVICE HOSES ................................................ 9 . System Description ................................................ 23 .
SERVICE COUPLERS ....................................... 10 . SWITCHES AND THEIR CONTROL FUNCTION 23 ...
REFRIGERANT WEIGHT SCALE ..................... 10 . CAN Communication System Description ............. 23 . L
CHARGING CYLINDER ..................................... 10 . TROUBLE DIAGNOSIS ........................................... 24 .
Precautions for Leak Detection Dye ...................... 10 . CONSULT-II Function (BCM) ................................ 24 .
IDENTIFICATION LABEL FOR VEHICLE .......... 10 . CONSULT-II START PROCEDURE ................... 24 . M
PREPARATION ........................................................ 12
. DATA MONITOR ................................................ 24 .
Special Service Tools ............................................ 12
. How to Perform Trouble Diagnosis for Quick and
HFC-134a (R-134a) Service Tools and Equipment 12 ... Accurate Repair ..................................................... 24 .
Commercial Service Tools ..................................... 15 . WORK FLOW ..................................................... 24 .
REFRIGERATION SYSTEM .................................... 16 . SYMPTOM TABLE ............................................. 24 .
Refrigerant Cycle .................................................. 16
. Component Parts and Harness Connector Location 25 ...
REFRIGERANT FLOW ...................................... 16 . ENGINE COMPARTMENT ................................. 25 .
FREEZE PROTECTION .................................... 16 . PASSENGER COMPARTMENT ........................ 26 .
Refrigerant System Protection .............................. 16 . Schematic .............................................................. 27 .
REFRIGERANT PRESSURE SENSOR ............ 16 . Wiring Diagram -- Heater -- ................................. 28 .
PRESSURE RELIEF VALVE .............................. 16 . WITHOUT A/C .................................................... 28 .
Component Layout ................................................ 17. Wiring Diagram -- A/C,M -- .................................. 29 .
Operational Check ................................................. 33 .
CHECKING BLOWER ........................................ 33 .
CHECKING DISCHARGE AIR ........................... 33 .
CHECKING RECIRCULATION .......................... 33 .
Revision: June 2006 MTC-1 2007 Versa
CHECKING TEMPERATURE DECREASE ........ 33 . HEATER CORE ........................................................73 .
CHECKING TEMPERATURE INCREASE ......... 33 . Removal and Installation ........................................73 .
CHECKING A/C SWITCH (IF EQUIPPED) ........ 33 . REMOVAL ...........................................................73 .
CHECKING DEFROST A/C SWITCH (IF INSTALLATION ...................................................73 .
EQUIPPED) ........................................................ 33 . AIR CONDITIONER FILTER ....................................74 .
Mode Door ............................................................. 34
. Removal and Installation ........................................74 .
INSPECTION FLOW .......................................... 34 . FUNCTION .........................................................74 .
Air Mix Door ........................................................... 35
. REPLACEMENT TIMING ...................................74 .
INSPECTION FLOW .......................................... 35 . REPLACEMENT PROCEDURES .......................74 .
Intake Door ............................................................ 36
. DUCTS AND GRILLES ............................................75 .
INSPECTION FLOW .......................................... 36 . Removal and Installation ........................................75 .
Blower Motor Circuit .............................................. 37 . CENTER VENTILATOR GRILLES ......................76 .
INSPECTION FLOW .......................................... 37 . SIDE VENTILATOR GRILLES (LH/RH) ..............76 .
DIAGNOSTIC PROCEDURE FOR BLOWER DEFROSTER NOZZLE AND SIDE
MOTOR .............................................................. 38
. DEFROSTER DUCTS (LH/RH) ..........................77 .
Magnet Clutch Circuit (If Equipped) ....................... 41 . SIDE VENTILATOR DUCTS ...............................77 .
INSPECTION FLOW .......................................... 41 . CENTER VENTILATOR DUCTS ........................78 .
SYSTEM DESCRIPTION ................................... 42 . SIDE FOOT DUCTS ...........................................78 .
DIAGNOSTIC PROCEDURE FOR MAGNET FLOOR DUCTS ..................................................78 .
CLUTCH ............................................................. 42
. REFRIGERANT LINES ............................................80 .
Insufficient Cooling ................................................ 50. HFC-134a (R-134a) Service Procedure .................80 .
INSPECTION FLOW .......................................... 50 . SETTING OF SERVICE TOOLS AND EQUIP-
PERFORMANCE TEST DIAGNOSIS ................ 52 . MENT ..................................................................80
.
PERFORMANCE CHART .................................. 54 . Components ...........................................................82 .
TROUBLE DIAGNOSIS FOR UNUSUAL PRES- Removal and Installation of Compressor ...............84 .
SURE .................................................................. 55
. REMOVAL ...........................................................84 .
Insufficient Heating ................................................ 58. INSPECTION FOR CLUTCH DISC TO PULLEY
INSPECTION FLOW .......................................... 58 . CLEARANCE ......................................................85 .
Noise ..................................................................... 60
. INSTALLATION ...................................................85 .
INSPECTION FLOW .......................................... 60 . Removal and Installation of Low-pressure Flexible
CONTROLLER ......................................................... 61 . Hose .......................................................................85
.
Removal and Installation ....................................... 61 . REMOVAL ...........................................................85 .
REMOVAL .......................................................... 61 . INSTALLATION ...................................................86 .
INSTALLATION ................................................... 61 . Removal and Installation of High-pressure Flexible
Disassembly and Assembly ................................... 62 . Hose .......................................................................86
.
THERMO CONTROL AMPLIFIER ........................... 63 . REMOVAL ...........................................................86 .
Removal and Installation ....................................... 63 . INSTALLATION ...................................................87 .
REMOVAL .......................................................... 63 . Removal and Installation of High-pressure Pipe ....87 .
INSTALLATION ................................................... 63 . REMOVAL ...........................................................87 .
A/C UNIT ASSEMBLY ............................................. 64 . INSTALLATION ...................................................87 .
Removal and Installation ....................................... 64 . Removal and Installation of Refrigerant Pressure
REMOVAL .......................................................... 64 . Sensor ....................................................................88
.
INSTALLATION ................................................... 65 . REMOVAL ...........................................................88 .
Disassembly and Assembly ................................... 66 . INSTALLATION ...................................................88 .
BLOWER MOTOR ................................................... 68 . Removal and Installation of Condenser .................88 .
Removal and Installation ....................................... 68 . REMOVAL ...........................................................88 .
REMOVAL .......................................................... 68 . INSTALLATION ...................................................88 .
INSTALLATION ................................................... 68 . Removal and Installation of Liquid Tank ................89 .
INTAKE DOOR ......................................................... 69 . REMOVAL ...........................................................89 .
Intake Door Cable Adjustment ............................... 69 . INSTALLATION ...................................................89 .
AIR MIX DOOR ........................................................ 70 . Removal and Installation of Evaporator .................90 .
Air Mix Door Cable Adjustment ............................. 70 . REMOVAL ...........................................................90 .
MODE DOOR ........................................................... 71 . INSTALLATION ...................................................90 .
Mode Door Cable Adjustment ............................... 71 . Removal and Installation of Expansion Valve ........91 .
BLOWER FAN RESISTOR ...................................... 72 . REMOVAL ...........................................................91 .
Removal and Installation ....................................... 72 . INSTALLATION ...................................................91 .
REMOVAL .......................................................... 72 . Checking for Refrigerant Leaks .............................92 .
INSTALLATION ................................................... 72 . Checking System for Leaks Using the Fluorescent
Leak Detector .........................................................92.
Revision: June 2006 MTC-2 2007 Versa
Dye Injection ......................................................... 92
. Compressor ........................................................... 96 .
Electronic Refrigerant Leak Detector .................... 93 . Oil .......................................................................... 96
. A
PRECAUTIONS FOR HANDLING LEAK Refrigerant ............................................................. 96
.
DETECTOR ....................................................... 93
. Engine Idling Speed .............................................. 96 .
CHECKING PROCEDURE ................................ 94 . Belt Tension ........................................................... 96. B
SERVICE DATA AND SPECIFICATIONS (SDS) ..... 96 .
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MTC
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Revision: June 2006 MTC-3 2007 Versa
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS005HO
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 Procedures without Cowl Top Cover EJS0056V
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
PIIB3706J
Precautions for Working with HFC-134a (R-134a) EJS0056W
WARNING:
G CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. These refrigerants
must never be mixed, even in the smallest amounts. If the refrigerants are mixed a compressor
malfunction is likely to occur.
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 malfunction 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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