Nissan Titan 2005 Owner's Manual
J AIR CONDITIONER
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MANUAL AIR CONDITIONER
CONTENTS
PRECAUTIONS .......................................................... 4
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 4
Precautions for Workingwith HFC-134a(R-134a)..... 4
Contaminated Refrigerant ........................................ 4
General Refrigerant Precautions .............................. 5
Precautions for Leak Detection Dye ......................... 5
A/C Identification Label ............................................ 6
Precautions for Refrigerant Connection ................... 6
FEATURES OF NEW TYPE REFRIGERANT
CONNECTION ...................................................... 6
O-RING AND REFRIGERANT CONNECTION..... 7
Precautions for Servicing Compressor ..................... 9
Precautions for Service Equipment .......................... 9
RECOVERY/RECYCLING EQUIPMENT .............. 9
ELECTRONIC LEAK DETECTOR ........................ 9
VACUUM PUMP ................................................. 10
MANIFOLD GAUGE SET .................................... 10
SERVICE HOSES ............................................... 10
SERVICE COUPLERS .........................................11
REFRIGERANT WEIGHT SCALE .......................11
CHARGING CYLINDER .......................................11
Wiring Diagrams and Trouble Diagnosis .................11
PREPARATION ......................................................... 12
Special Service Tools ............................................. 12
HFC-134a (R-134a) ServiceToolsand Equipment... 12
Commercial Service Tools ...................................... 15
REFRIGERATION SYSTEM ..................................... 16
Refrigerant Cycle ................................................... 16
REFRIGERANT FLOW ....................................... 16
Refrigerant System Protection ............................... 16
REFRIGERANT PRESSURE SENSOR ............. 16
PRESSURE RELIEF VALVE .............................. 17
Component Layout ................................................. 18
REFRIGERATION SYSTEM ............................... 18
LUBRICANT ............................................................. 20
Maintenanceof LubricantQuantity in Compressor... 20
LUBRICANT ........................................................ 20
CHECKING AND ADJUSTING ........................... 20
AIR CONDITIONER CONTROL ............................... 22
Description ..............................................................22
Operation ................................................................22
AIR MIX DOOR CONTROL .................................22
BLOWER SPEED CONTROL .............................22
INTAKE DOORS CONTROL ...............................22
MODE DOOR CONTROL ...................................22
DEFROSTER DOOR CONTROL ........................22
MAGNET CLUTCH CONTROL ...........................22
SELF-DIAGNOSTIC SYSTEM ............................23
Description of Control System ................................24
Control Operation ...................................................24
TEMPERATURE CONTROL DIAL (TEMPERA-
TURE CONTROL) ...............................................25
RECIRCULATION () SWITCH .............................25
REAR WINDOW DEFOGGER SWITCH ............. 25
OFF SWITCH (BLOWER SPEED SET TO 0) ..... 25
A/C SWITCH .......................................................25
MODE CONTROL DIAL ......................................25
FRONT BLOWER CONTROL DIAL ....................25
Discharge Air Flow ................................................. 25
System Description .................................................26
SWITCHESANDTHEIRCONTROLFUNCTION...26
CAN Communication System Description .............. 27
TROUBLE DIAGNOSIS ............................................28
CONSULT-II Function (HVAC) ................................28
CONSULT-II BASIC OPERATION .......................28
SELF-DIAGNOSIS ..............................................29
DATA MONITOR .................................................29
CONSULT-II Function (BCM) .................................31
CONSULT-II BASIC OPERATION .......................31
DATA MONITOR .................................................32
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ......................................................33
WORK FLOW ......................................................33
SYMPTOM TABLE ..............................................33
ComponentPartsandHarnessConnectorLocation...34
ENGINE COMPARTMENT ..................................34
FRONT PASSENGER COMPARTMENT ............ 35
Schematic ...............................................................36
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Wiring Diagram — A/C — .......................................37
Front Air Control Terminals and Reference Value...43
PIN CONNECTOR TERMINAL LAYOUT ............43
TERMINALS AND REFERENCE VALUE FOR
FRONT AIR CONTROL .......................................43
A/C System Self-diagnosis Function (With NAVI
Only) .......................................................................45
DESCRIPTION ....................................................45
Operational Check ..................................................47
CHECKING BLOWER .........................................47
CHECKING DISCHARGE AIR ............................ 47
CHECKING RECIRCULATION ............................47
CHECKING TEMPERATURE DECREASE .........48
CHECKING TEMPERATURE INCREASE ..........48
CHECK A/C SWITCH ..........................................48
PowerSupplyandGround CircuitforFrontAirCon-
trol ...........................................................................49
INSPECTION FLOW ...........................................49
COMPONENT DESCRIPTION ............................50
DIAGNOSTICPROCEDUREFORA/CSYSTEM...50
Mode Door Motor Circuit ........................................52
INSPECTION FLOW ...........................................52
SYSTEM DESCRIPTION ....................................53
COMPONENT DESCRIPTION ............................53
DIAGNOSTIC PROCEDURE FOR MODE
DOOR MOTOR ...................................................53
Air Mix Door Motor Circuit ......................................56
INSPECTION FLOW ...........................................56
SYSTEM DESCRIPTION ....................................57
COMPONENT DESCRIPTION ............................57
DIAGNOSTIC PROCEDURE FOR AIR MIX
DOOR MOTOR (FRONT) ....................................58
Intake Door Motor Circuit ........................................60
INSPECTION FLOW ...........................................60
SYSTEM DESCRIPTION ....................................61
COMPONENT DESCRIPTION ............................61
DIAGNOSTIC PROCEDURE FOR INTAKE
DOOR MOTOR ...................................................62
Defroster Door Motor Circuit ...................................63
SYMPTOM: .......................................................... 63
INSPECTION FLOW ...........................................63
SYSTEM DESCRIPTION ....................................64
COMPONENT DESCRIPTION ............................64
DIAGNOSTIC PROCEDURE FOR
DEFROSTER DOOR MOTOR ............................ 64
Front Blower Motor Circuit ......................................67
INSPECTION FLOW ...........................................67
SYSTEM DESCRIPTION ....................................68
COMPONENT DESCRIPTION ............................68
DIAGNOSTIC PROCEDURE FOR BLOWER
MOTOR ...............................................................69
COMPONENT INSPECTION ..............................73
Magnet Clutch Circuit .............................................74
INSPECTION FLOW ...........................................74
SYSTEM DESCRIPTION ....................................75
DIAGNOSTIC PROCEDURE FOR MA GNET
CLUTCH ..............................................................75
COMPONENT INSPECTION ..............................79
Insufficient Cooling .................................................80
INSPECTION FLOW ............................................80
PERFORMANCE TEST DIAGNOSES ................81
PERFORMANCE CHART ....................................83
TROUBLEDIAGNOSESFORUNUSUALPRES-
SURE ...................................................................84
Insufficient Heating .................................................87
INSPECTION FLOW ............................................87
Noise .......................................................................88
INSPECTION FLOW ............................................88
Self-diagnosis .........................................................89
INSPECTION FLOW ............................................89
Water Valve Circuit ..................................................90
COMPONENT DESCRIPTION ............................90
DIAGNOSTIC PROCEDURE FOR WATER
VA LVE ..................................................................90
COMPONENT INSPECTION ...............................92
Intake Sensor Circuit ...............................................92
COMPONENT DESCRIPTION ............................92
DIAGNOSTICPROCEDUREFORINTAKESEN-
SOR .....................................................................92
COMPONENT INSPECTION ...............................94
CONTROL UNIT ........................................................95
Removal and Installation .........................................95
REMOVAL ............................................................95
INSTALLATION ....................................................95
INTAKE SENSOR ......................................................96
Removal and Installation .........................................96
REMOVAL ............................................................96
INSTALLATION ....................................................96
BLOWER MOTOR .....................................................97
Removal and Installation .........................................97
REMOVAL ............................................................97
INSTALLATION ....................................................97
IN-CABIN MICROFILTER ..........................................98
Removal and Installation .........................................98
FUNCTION ..........................................................98
REPLACEMENT TIMING ....................................98
REPLACEMENT PROCEDURE ..........................98
HEATER & COOLING UNIT ASSEMBLY ...............100
Removal and Installation .......................................100
REMOVAL ..........................................................100
INSTALLATION ..................................................101
HEATER CORE .......................................................102
Removal and Installation .......................................102
REMOVAL ..........................................................103
INSTALLATION ..................................................103
DEFROSTER DOOR MOTOR .................................104
Removal and Installation .......................................104
REMOVAL ..........................................................104
INSTALLATION ..................................................104
INTAKE DOOR MOTOR ..........................................105
Removal and Installation .......................................105
REMOVAL ..........................................................105
INSTALLATION ..................................................105
MODE DOOR MOTOR ............................................106
Removal and Installation .......................................106
REMOVAL ..........................................................106
INSTALLATION ..................................................106
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AIR MIX DOOR MOTOR ......................................... 107
Removal and Installation ...................................... 107
REMOVAL ......................................................... 107
INSTALLATION ................................................. 107
VARIABLE BLOWER CONTROL .......................... 108
Removal and Installation ...................................... 108
REMOVAL ......................................................... 108
INSTALLATION ................................................. 108
DUCTS AND GRILLES .......................................... 109
Removal and Installation ...................................... 109
DEFROSTER NOZZLE ......................................110
RH AND LH SIDE DEMISTER DUCT ................110
RH AND LH VENTILATOR DUCT ......................110
CENTER VENTILATOR DUCT .......................... 111
FLOOR DUCT .................................................... 111
GRILLES ............................................................ 111
REFRIGERANT LINES ............................................112
HFC-134a (R-134a) Service Procedure ................112
SETTING OF SERVICE TOOLS AND EQUIP-
MENT .................................................................112
Components ..........................................................114
Removal and Installation for Compressor .............115
REMOVAL ..........................................................115
INSTALLATION ..................................................116
Removal and Installation for Compressor Clutch..116
REMOVAL ..........................................................116
INSPECTION .....................................................117
INSTALLATION ..................................................118
BREAK-IN OPERATION ....................................119
RemovalandInstallationforLow-pressureFlexible
Hose ......................................................................119
REMOVAL ..........................................................119
INSTALLATION ..................................................119
RemovalandInstallationforHigh-pressureFlexible
Hose ......................................................................119
REMOVAL ..........................................................119
INSTALLATION .................................................119
Removal and Installation for High-pressure Pipe.120
REMOVAL .........................................................120
INSTALLATION .................................................120
Removal and Installation for Low-pressure Pipe ..120
REMOVAL .........................................................120
INSTALLATION .................................................120
Removal and Installation for Refrigerant Pressure
Sensor ..................................................................120
REMOVAL .........................................................120
INSTALLATION .................................................120
Removal and Installation for Condenser ..............120
REMOVAL .........................................................120
INSTALLATION .................................................121
Removal and Installation for Evaporator ..............122
REMOVAL .........................................................122
INSTALLATION .................................................123
Removal and Installation for Expansion Valve ......123
REMOVAL .........................................................123
INSTALLATION .................................................123
Checking for Refrigerant Leaks ............................123
Checking System forLeaks Using theFluorescent
Dye Leak Detector ................................................123
Dye Injection .........................................................124
Electronic Refrigerant Leak Detector ....................124
PRECAUTIONS FOR HANDLING LEAK
DETECTOR .......................................................124
CHECKING PROCEDURE ...............................125
SERVICE DATA AND SPECIFICATIONS (SDS) ....127
Service Data and Specifications (SDS) ................127
COMPRESSOR ................................................127
LUBRICANT ......................................................127
REFRIGERANT .................................................127
ENGINE IDLING SPEED ..................................127
BELT TENSION .................................................127
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PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”,usedalong
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 Manual.
WARNING:
● To avoid rendering the SRS inoperative, which could increase the risk of personal i njury or death
in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer.
● 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.
● 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.
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Precautions for Working with HFC-134a (R-134a)
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WARNING:
● 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.
● 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.
● The specified HFC-134a (R-134a) lubricant rapidly absorbs moisture from the atmosphere. The fol-
lowing handling precautions must be observed:
– When removing refrigerant components from a vehicle, immediately cap (seal) the component to
minimize the entry of moisture from the atmosphere.
– When installing refrigerant components to a vehicle, do not remove the caps (unseal) until just
before connecting the components. Connect all refrigerant loop components as quickly as possibletominimizetheentryofmoistureintosystem.
– Only use the specified lubricant from a sealed container. Immediately reseal containers of lubri-
cant. Without proper sealing, lubricant will become moisture saturated and should not be used.
– Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and
throat. Remove HFC-134a (R-134a) from the A/C system using certified service equipment meeting
requirements of SAE J2210 [HFC-134a(R-134a) recyclingequipment], or J2209 [HFC-134a (R-134a)
recovery equipment]. If accidental system discharge occurs, ventilate work area before resuming
service. Additional health and safety information may be obtained from refrigerant and lubricant
manufacturers.
– Do not allow lubricant, NISSAN A/C System Lubricant Type S (DH-PS) or equivalent, to come in
contact with styrofoam parts. Damage may result.
Contaminated Refrigerant
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If a refrigerant other than pure HFC-134a (R-134a) is identified in a vehicle, your options are:
● Explain to the customer that environmental regulations prohibit the release of contaminated refrigerant
into the atmosphere.
● Explain that recovery of the contaminated refrigerant could damage your service equipment and refriger-
ant supply.
● Suggest the customer return the vehicle to the location of previous service where the contamination may
have occurred.
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PRECAUTIONS
● If you choose to perform the repair, recover the refrigerantusing only dedicated equipment and contain-
ers. Do not recover contaminated refrigerant into your existing service equipment. If your facility
does not have dedicated recoveryequipment, you may contact a local refrigerant product retailer for available service. This refrigerant must be disposed of in accordance with all federal and local regulations. In
addition, replacement of all refrigerant system components on the vehicle is recommended.
● If the vehicle is within the warranty period, the air conditioner warranty is void. Please contact N ISSAN
Customer Affairs for further assistance.
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WARNING:
● Do not release refrigerant into the air. Use approved recovery/recycling equipment to capture the
refrigerant every time an air conditioning system is discharged.
● Always wear eye and hand protection (goggles and gloves) when working with any refrigerant or
air conditioning system.
● Do not store or heat refrigerant containers above 52°C(125°F).
● Do not heat a refrigerant container with an open flame; if container warming is required, place the
bottom of the container in a warm pail of water.
● Do not intentionally drop, puncture, or incinerate refrigerant containers.
● Keep refrigerant away from open flames: poisonous gas will be produced if refrigerant burns.
● Refrigerant will displace oxygen, therefore be certain to work in well ventilated areas to prevent
suffocation.
● Do not pressure test or leak test HFC-134a (R-134a) service equipment and/or vehicle air condi-
tioning systems with compressed air during repair. Some mixtures of air and HFC-134a (R-134a)
have been shown to be combustible at elevated pressures. These mixtures, if ignited, may cause
injury or property damage. Additional health and safety information may be obtained from refrigerant manufacturers.
Precautions for Leak Detection Dye
● The A/C system contains a fluorescentleak detection dye used for locatingrefrigerant leaks. An ultraviolet
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(UV) lamp is required to illuminate the dye when inspecting for leaks.
● Always wear fluorescence enhancing UV safety goggles to protect your eyes and enhance the visibility of
the fluorescent dye.
● The fluorescent dye leak detector is not a replacement for an electronic refrigerant leak detector. The fluo-
rescent dye leak detector should be used in conjunction with an electronic refrigerant leak detector (J-
41995).
● For your safety and the customer's satisfaction, read and follow all manufacturer's operating instructions
and precautions prior to performing work.
● A compressor shaft seal should not be repaired because of dye seepage. The compressor shaft seal
should only be repaired after confirming the leak with an electronic refrigerant leak detector (J-41995).
● Alwaysremoveanydyefromtheleakareaafterrepairsarecompletetoavoidamisdiagnosisduringa
future service.
● Do not allow dye to come into contact with painted body panels or interior components. If dye is spilled,
clean immediately with the approved dye cleaner.Fluorescent dye left on a surface for an extended period
of time cannot be removed .
● Do not spray the fluorescent dye cleaning agent on hot surfaces (engine exhaust manifold, etc.).
● Do not use more than one refrigerant dye bottle (1/4 ounce / 7.4 cc) per A/C system.
● Leak detection dyes for HFC-134a (R-134a) and CFC-12 (R-12) A/C systems are different. Do not use
HFC-134a (R-134a) leak detection dye in CFC-12 (R-12) A/C systems or CFC-12 (R-12) leak detection
dye in HFC-134a (R-134a) A/C systems or A/C system damage may result.
● The fluorescent properties of the dye will remain for over three (3) years unless a compressor failure
occurs.
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PRECAUTIONS
A/C Identification Label
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Vehicles with factory installed fluorescent dye have this identification
label on the underside of hood.
WJIA0672E
Precautions for Refrigerant Connection
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A new type refrigerant connection has been introduced to all refrigerant lines except the following locations.
● Expansion valve to cooling unit
● Evaporator pipes to evaporator (inside cooling unit)
● Refrigerant pressure sensor
FEATURES OF NEW TYPE REFRIGERANT CONNECTION
● The O-ring has been relocated. It has also been provided with a groove for proper installation. This
reduces the possibility of the O-ring being caught in, or damaged by, the mating part. The sealing direction
of the O-ring is now set vertically in relation to the contacting surface of the mating part to improve sealing
characteristics.
● The reaction force of the O-ring will not occur in the direction that causes the joint to pull out, thereby facil-
itating piping connections.
SHA815E
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PRECAUTIONS
O-RING AND REFRIGERANT CONNECTION
A/C Compressor and Condenser
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WJIA1020E
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PRECAUTIONS
1. High-pressure service valve 2. Grommet 3. High-pressure pipe
4. Refrigerant pressure sensor 5. Condenser 6. Compressor shaft seal
7. High-pressure flexible hose 8. Low-pressure flexible hose 9. Low-pressure service valve
10. Low-pressure pipe 11. Expansion valve 12. Drain hose
CAUTION:
The new and former refrigerant connections use different O-ring configurations. Do not confuse Orings since they are not interchangeable. If a wrong O-ring is installed, refrigerant will leak at or
around the connection.
O-Ring Part Numbers and Specifications
Connection type
New 8 92471 N8210 6.8 (0.268) 1.85 (0.0728)
Former 10 J2476 89956 9.25 (0.3642) 1.78 (0.0701)
New
Former 92475 71L00 11.0 (0.433) 2.4 (0.094)
New
Former 92475 72L00 14.3 (0.563) 2.3 (0.091)
New
SHA814E
*: Always check with the Parts Department for the lat est parts information.
Former 92477 N8200 17.12 (0.6740) 1.78 (0.0701)
New 24 92195 AH300 21.8 (0.858) 2.4 (0.094)
WARNING:
Make sure all refrigerant is discharged into the recycling equipment and the pressure in the system is
less than atmospheric pressure. Then gradually loosen the discharge side hose fitting and remove it.
CAUTION:
When replacing or cleaning refrigerant cycle components, observe the following.
● When the compressor is removed, store it in the same position as it is when mounted on the car.
Failure to do so will cause lubricant to enter the low pressure chamber.
● When connecting tubes, always use a torque wrench and a back-up wrench.
● After disconnecting tubes, immediately plug all openings to prevent entry of dirt and moisture.
● When installing an air conditioner in the vehicle, connect the pipes as the final stage of the opera-
tion. Do not remove the seal caps of pipes and other components until just before required for
connection.
● Allow components stored in cool areas to warm to working area temperature before removing seal
caps. This prevents condensation from forming inside A/C components.
● Thoroughly remove moisture from the refrigeration system before charging the refrigerant.
● Always replace used O-rings.
● When connecting tube, apply lubricant to circle of the O-rings shown in illustration. Be careful not
to apply lubricant to threaded portion.
Lubricant name: NISSAN A/C System Lubricant Type S (DH-PS)
Part number: KLH00-PAGS0
● O-ring must be closely attached to dented portion of tube.
● When replacing the O-ring, be careful not to damage O-ring and tube.
● Connect tube until you hear it click, then tighten the nut or bolt by hand until snug. Make sure that
theO-ringisinstalledtotubecorrectly.
O-ring
size
12
16
19
Part number* D mm(in) W mm(in)
92472 N8210 10.9 (0.429) 2.43 (0.0957)
92473 N8210 13.6 (0.535) 2.43 (0.0957)
92474 N8210 16.5 (0.650) 2.43 (0.0957)
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PRECAUTIONS
● After connecting line, conduct leak test and make sure that there is no leakage from connections.
When the gas leaking point is found, disconnect that line and replace the O-ring. Then tighten connections of seal seat to the specified torque.
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Precautions for Servicing Compressor
● Plug all openings to prevent moisture and foreign matter from entering.
● Whenthecompressorisremoved,storeitinthesamepositionasitiswhenmountedonthecar.
● When replacing or repairing compressor, follow “Maintenance of Lubricant Quantity in Compres-
sor” exactly. Refer to MTC-20, "
● Keep friction surfaces between clutch and pulley clean. If the surface is contaminated with lubri-
Maintenance of Lubricant Quantity in Compressor" .
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cant, wipe it off by using a clean waste cloth moistened with thinner.
● After compressor service operation, turn the compressor shaft by hand more than 5 turns in both
directions. This will equally distribute lubricant inside the compressor . After the compressor is
installed, let the engine idle and operate the compressor for 1 hour.
● After replacing the compressor magnet clutch, apply voltage to the new one and check for normal
operation. Refer to MTC-116, "
Precautions for Service Equipment
Removal and Installation for Compressor Clutch".
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RECOVERY/RECYCLING EQUIPMENT
Follow the manufacturer's instructions for machine operation and machine maintenance. Never introduce any
refrigerant other than that specified into the machine.
ELECTRONIC LEAK DETECTOR
Follow the manufacturer's instructions for tester operation and tester maintenance.
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VACUUM PUMP
The lubricant contained inside the vacuum pump is not compatible
with the specified lubricant for HFC-134a (R-134a) A/C systems.
The vent side of the vacuum pump is exposed to atmospheric pressure so the vacuum pump lubricant may migrate out of the pump into
the service hose. This is possible when the pump is switched off
after evacuation (vacuuming) and hose is connected to it.
To prevent this migration, use a manual valve situated near the
hose-to-pump connection, as follows.
● Usually vacuum pumps have a manual isolator valve as part of
the pump. Close this valve to isolate the service hose from the
pump.
● For pumps without an isolator, use a hose equipped with a man-
ual shut-off valve near the pump end. Close the valve to isolate
the hose from the pump.
● If the hose has an automatic shut off valve, disconnect the hose
from the pump: as long as the hose is connected, the valve is
open and lubricating oil may migrate.
Some one-way valves open when vacuum is applied and close
under a no vacuum condition. Such valves may restrict the pump's
ability to pull a deep vacuum and are not recommended.
MANIFOLD GAUGE SET
Be certain that the gauge face indicates HFC-134a (R-134a or
134a). Make sure the gauge set has 1/2″-16 ACME threaded connections for service hoses. Confirm the set has been used only with
refrigerant HFC-134a (R-134a) along with specified lubricant.
SERVICE HOSES
Be certain that the service hoses display the markings described
(colored hose with black stripe).All hoses must include positive shutoff devices (either manual or automatic) near the end of the hoses
opposite the manifold gauge.
RHA270D
SHA533D
RHA272D
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PRECAUTIONS
SERVICE COUPLERS
Never attempt to connect HFC-134a (R-134a) service couplers to a
CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers will
not properly connect to the CFC-12 (R-12) system. If an improper
connection is attempted, discharging and contamination may occur.
Shut-off valve rotation A/C service valve
Clockwise Open
Counterclockwise Close
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RHA273D
REFRIGERANT WEIGHT SCALE
Verify that no refrigerant other than HFC134a(R-134a) and specified
lubricants have been used with the scale. If the scale controls refrigerant flow electronically, the hose fitting must be 1/2"-16 ACME.
RHA274D
CHARGING CYLINDER
Using a charging cylinder is not recommended. Refrigerant may be vented into air from cylinder's top valve
when filling the cylinder with refrigerant. Also, the accuracy of the cylinder is generally less than that of an
electronic scale or of quality recycle/recharge equipment.
Wiring Diagrams and Trouble Diagnosis
Whenyoureadwiringdiagrams,refertothefollowing:
● GI-14, "HowtoReadWiringDiagrams"
● PG-4, "POWER SUPPLY ROUTING CIRCUIT"
When you perform trouble diagnosis, refer to the following:
● GI-9, "How to Follow Trouble Diagnoses"
● GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident"
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PREPARATION
PREPARATION PFP:00002 Special Service Tools
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The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name
—
(J-38873-A)
Pulley installer
LHA171
KV99233130
(J-29884)
Pulley puller
LHA172
HFC-134a (R-134a) Service Tools and Equipment
Description
Installing pulley
Removing pulley
EJS003RH
Never mix HFC-134a (R-134a) refrigerant and/or the specified lubricant with CFC-12 (R-12) refrigerant and/or
the lubricant.
Separateand non-interchangeableservice equipment must be used for handlingeach type of refrigerant/lubricant.
Refrigerant container fittings, service hose fittings and service equipment fittings (equipment which handles
refrigerant and/or lubricant) are different between CFC-12 (R-12) and HFC-134a (R-134a). This is to avoid
mixed use of the refrigerants/lubricant.
Adapters that convert one size fitting to another must never be used refrigerant/lubricant contamination will
occur and compressor failure will result.
Tool number
(Kent-Moore No.)
Tool name
HFC-134a (R-134a)
( — )
Refrigerant
Description
Container color: Light blue
Container marking: HFC-134a (R134a)
Fitting size: Thread size
● large container 1/2”-16 ACME
S-NT196
KLH00-PAGR0
( — )
NISSAN A/C System Lubricant
Type S (DH-PS)
S-NT197
—
(J-43600)
Recovery/Recycling
Recharging equipment (ACR2000)
WJIA0293E
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Type: Poly alkylene glycol oil (PAG),
type S (DH-PS)
Application: HFC-134a (R-134a)
swash plate compressors (NISSAN
only)
Lubricity: 40 m (1.4 US fl oz, 1.4 Imp
fl oz)
Refrigerant Recovery and Recycling
and Recharging
PREPARATION
Tool number
(Kent-Moore No.)
Tool name
—
(J-41995)
Electronic refrigerant leak detector
—
(J-43926)
Refrigerant dye leak detection kit
Kit includes:
(J-42220) UV lamp and UV safety
goggles
(J-41459) Refrigerant dye injector
(J-41447) qty. 24
HFC-134a (R-134a) refrigerant
dye
(J-43872) Refrigerant dye cleaner
—
(J-42220)
Fluorescent dye leak detector
—
(J-41447)
HFC-134a (R-134a) Fluorescent
leak detection dye
(Box of 24, 1/4 ounce bottles)
SHA438F
AHA281A
ZHA200H
Description
Power supply:
● DC 12V (battery terminal)
Power supply:
● DC 12V (battery terminal)
Power supply:
● DC 12V (battery terminal)
For checking refrigerant leak whe n fl uorescent dye is insta lled in A/C system.
Includes: UV lamp and UV saf ety goggles
Application: For HFC-134a (R-134a)
PAG oil
Container: 1/4 ounce (7.4cc) bottle
(Includes self-adhesive dye id entification labels for affixing to vehicle after
charging system with dye.)
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SHA439F
—
(J-41459)
HFC-134a (R-134a) Dye injector
Use with J-41447, 1/4 ounce bottle
SHA440F
—
(J-43872)
Refrigerant dye cleaner
SHA441F
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For injecting 1/4 ounce of fluorescent
leak detection dye into A/C system.
For cleaning dye spills.
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PREPARATION
Tool number
(Kent-Moore No.)
Tool name
—
(J-39183-C)
Manifold gauge set (with hoses
and couplers)
Service hoses:
● High side hose
(J-39500-72B)
● Low side hose
(J-39500-72R)
● Utility hose
(J-39500-72Y)
Service couplers
● High side coupler
(J-39500-20A)
● Low side coupler
(J-39500-24A)
S-NT201
Description
Identification:
● The gauge face indicates R-134a.
Fittingsize-Thread size
● 1/2”-16 ACME
RJIA0196E
Hose color:
● Low side hose: Blue with black stripe
● High side hose: Red with black stripe
● Utility hose: Yellow with black stripe
or green with black stripe
Hose fitting to gauge:
● 1/2”-16 ACME
Hose fitting to service hose:
● M14 x 1 .5 fitting is optional or perma-
nently attached.
—
(J-39699)
Refrigerant weight scale
—
(J-39649)
Vacuum pump
(Including the isolator valve)
S-NT202
For measuring of refrigerant
Fitting size-Thread size
● 1/2”-16 ACME
S-NT200
Capacity:
● Air dis placement: 4 CFM
● Micron rating: 20 microns
● Oil capacity: 482 g (17 oz)
Fittingsize-Thread size
● 1/2”-16 ACME
S-NT203
Revision: October 2004 2005 Titan
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PREPARATION
Commercial Service Tools
Tool name Description
(J-41810-NI)
Refrigerant identifier equipment (R134a)
RJIA0197E
Power tool Loosening bolts and nuts
PBIC0190E
(J-44614)
Clutch disc holding tool
For checking refrigerant purity and
system contamination
Clutch disc holding tool
EJS003RI
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REFRIGERATION SYSTEM
REFRIGERATION SYSTEM PFP:KA990 Refrigerant Cycle
EJS0031Z
REFRIGERANT FLOW
The refrigerant flows in the standard pattern, that is, through the compressor, the condenser with liquid tank,
through the evaporator, and back to the compressor. The refrigerant evaporation through the evaporator coils
are controlled by externally equalized expansion valve, located inside the evaporator case.
Refrigerant System Protection
EJS00320
REFRIGERANT PRESSURE SENSOR
The refrigerant system is protected against excessively high or low pressures by the refrigerant pressure sensor, located on the condenser. If the system pressure rises above or falls below the specifications, the refrigerant pressure sensor detects the pressure inside the refrigerant line and sends a voltage signal to the ECM.
The ECM de-energizesthe A/C relay to disengage the magnetic compressor clutch when pressure on the high
pressure side detected by refrigerant pressure sensor is over about 2,746 kPa (28 kg/cm
about 120 kPa (1.22 kg/cm
2
,17.4psi).
2
, 398 psi), or below
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MTC-16
REFRIGERATION SYSTEM
PRESSURE RELIEF VALVE
The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.
When the pressure of refrigerant in the system increases to an abnormal level [more than 2,990 kPa (30.5 kg/
2
cm
, 433.6 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant
into the atmosphere.
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REFRIGERATION SYSTEM
Component Layout
REFRIGERATION SYSTEM
EJS00321
LJIA0141E
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MTC-18
REFRIGERATION SYSTEM
1. Defroster nozzle 2. LH side demister duct 3. LH ventilator duct
4. RH side demister duct 5. RH ventilator duct 6. Center ventilator duct
7. Heater and cooling unit assembly 8. Floor duct 9. Clips
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LUBRICANT
LUBRICANT PFP:KLG00 Maintenance of Lubricant Quantity in Compressor
EJS00322
The lubricant in the compressor circulates through the system with the refrigerant. Add lubricant to compressor when replacing any component or after a large refrigerant leakage has occurred. It is important to maintain
the specified amount.
If lubricant quantity is not maintained properly, the following malfunctions may result:
● Lack of lubricant: May lead to a seized compressor
● Excessive lubricant: Inadequate cooling (thermal exchange interference)
LUBRICANT
Name: NISSAN A/C System Lubricant Type S (DH-PS)
Part number: KLH00-PAGS0
CHECKING AND ADJUSTING
CAUTION:
If excessive lubricant leakage is noted, do not perform the lubricant return operation.
Start the engine and set the following conditions:
test condition
● Engine speed: Idling to 1,200 rpm
● A/C switch: On
● Blower speed: Max. position
● Temperature control: Optional [set so that intake air temperature is 25° to 30° C(77° to 86°F).]
● Intake position: Recirculation ( )
● Perform lubricant return operation for about ten minutes
Adjust the lubricant quantity according to the following table.
Lubricant Adjusting Procedure for Components Replacement Except Compressor
After replacing any of the following major components, add the correct amount of lubricant to the system.
Amount of lubricant to be added:
Lubricant to be added to system
Part replaced
Front evaporator 75 (2.5, 2.6) —
Condenser 75 (2.5, 2.6) —
Liquid tank 5 (0.2, 0.2) Add if compressor is not replaced.
In case of refrigerant leak
*1: If refrigerant leak is small, no addition of lubricant is needed.
Amount of lubricant
m (US fl oz, Imp fl oz)
30 (1.0, 1.1) Large leak
— Small leak *1
Remarks
Lubricant Adjustment Procedure for Compressor Replacement
1. Before connecting recovery/recycling equipment to vehicle, check recovery/recycling equipment gauges.
No refrigerant pressure should be displayed. If NG, recover refrigerant from equipment lines.
2. Connect recovery/recycling equipment to vehicle. Confirm refrigerantpurity in supply tank using recovery/
recycling equipment and refrigerant identifier. If NG, refer to MTC-4, "
3. Confirm refrigerantpurity in vehicle A/C system using recovery/recyclingequipment and refrigerant identifier. If NG, refer to MTC-4, "
Contaminated Refrigerant" .
4. Discharge refrigerantinto the refrigerant recovery/recycling equipment. Measure lubricant dischargedinto
the recovery/recycling equipment.
5. Drain the lubricant from the “old” (removed) compressor into a graduated container and recover the
amount of lubricant drained.
6. Drain the lubricant from the “new” compressor into a separate, clean container.
7. Measure an amount of new lubricant installed equal to amount drained from “old” compressor. Add this
lubricant to “new” compressor through the suction port opening.
Contaminated Refrigerant" .
Revision: October 2004 2005 Titan
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LUBRICANT
8. Measure an amount of new lubricant equal to the amount recovered during discharging. Add this lubricant
to “new” compressor through the suction port opening.
9. If the liquid tank also needs to be replaced, add an additional 5 m (0.2 US fl oz, 0.2 Imp fl oz) of lubricant
at this time.
Do not add this 5 m (0.2 US fl oz, 0.2 Imp fl oz) of lubricant if only replacing the compressor.
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AIR CONDITIONER CONTROL
AIR CONDITIONER CONTROL PFP:27500 Description
EJS003TN
The front air control provides regulation of the vehicle's interior temperature. The system is based on the position of the front air controls temperature switch selected by the driver. This is done by utilizing a microcomputer, also referred to as the front air control, which receives input signals from the following two sensors:
● Intake sensor
● PBR (Position Balanced Resistor).
The front air control uses these signals (includingthe set position of the temperature switch) to control:
● Outlet air volume
● Air temperature
● Air distribution
Operation
EJS003TO
AIR MIX DOOR CONTROL
The air mix door is controlled so that in-vehicle temperature changed based on the position of the temperature
switch.
BLOWER SPEED CONTROL
Blower speed is controlled based on front blower switch settings.
When blower switch is turned, the blower motor starts and increases air flow volume each time the blower
switch is turned clockwise, and decreases air flow volume each time the blower switch is turned counterclockwise.
When engine coolant temperature is low, the blower motor operation is delayed to prevent cool air from flowing.
INTAKE DOORS CONTROL
The intake doors are controlled by the recirculation switch setting, and the mode (recirculation is not allowed in
floor, floor/defrost or defrost modes) control dial setting.
MODE DOOR CONTROL
The mode door is controlled by the position of the mode control dial.
DEFROSTER DOOR CONTROL
The defroster door is controlled by turning the defroster dial to front defroster.
MAGNET CLUTCH CONTROL
WJIA1379E
When A/C switch or DEF switch is pressed, front air control inputs compressor ON signal to BCM.
BCM sends compressor ON signal to ECM, via CAN communication line.
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MTC-22
AIR CONDITIONER CONTROL
ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant pressure sensor signal, throttle angle sensor, etc.). If it judges compressor can be turned ON, it sends compressor ON signal to IPDM E/R, via CAN communication line.
Upon receipt of compressor ON signal from ECM, IPDM E/R turns air conditioner relay ON to operate compressor.
SELF-DIAGNOSTIC SYSTEM
The self-diagnostic system is built into the front air control to quickly locate the cause of symptoms. Refer to
MTC-45, "
A/C System Self-diagnosis Function (With NAVI Only)" .
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AIR CONDITIONER CONTROL
Description of Control System
The control system consists of input sensors, switches, the front air control (microcomputer) and outputs.
The relationship of these components is shown in the figure below:
EJS003TP
Control Operation
WJIA1448E
EJS003TQ
Front air control
WJIA1405E
Revision: October 2004 2005 Titan
MTC-24
AIR CONDITIONER CONTROL
TEMPERATURE CONTROL DIAL (TEMPERATURE CONTROL)
Increases or decreases the set temperature.
RECIRCULATION () SWITCH
● When REC switch is ON, REC switch indicator turns ON, and air inlet is set to REC.
● When REC switch is turned OFF, or when compressor is turned from ON to OFF, REC switch is automati-
cally turned OFF. REC mode can be re-entered by pressing REC switch again.
● REC switch i s not operated when DEF switch is turned ON, at the D/F position, or in floor mode.
REAR WINDOW DEFOGGER SWITCH
When switch is ON, rear window is defogged.
OFF SWITCH (BLOWER SPEED SET TO 0)
The compressor and blower are OFF, the intake doors are set to the outside air position, and the air outlet
doors are set to the foot position.
A/C SWITCH
The compressor is ON or OFF.
MODE CONTROL DIAL
Controls the air discharge outlets through control of the mode and defroster doors.
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FRONT BLOWER CONTROL DIAL
Manually control the blower speed. Fourteen speeds are available for manual control.
Discharge Air Flow
EJS003TR
WJIA0540E
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MTC-25
AIR CONDITIONER CONTROL
System Description
SWITCHES AND THEIR CONTROL FUNCTION
EJS003TS
WJIA0531E
WJIA1406E
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MTC-26
AIR CONDITIONER CONTROL
CAN Communication System Description
Refer to LAN-7, "CAN COMMUNICATION" .
EJS003TU
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TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS PFP:00004 CONSULT-II Function (HVAC)
EJS003TV
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
Diagnostic mode Description
SELF-DIAG RESULTS Displays front air control self-diagnosis results.
DATA MONITOR Displays front air control input/output data in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ECU PARTNUMBER Front air control part number can be read.
CONSULT-II BASIC OPERATION
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and CONSUL T-II CONVERTER to the data link connector, and turn the
ignition switch ON.
2. Touch “START (NISSAN BASED VHCL)”.
3. Touch “HVAC” on “SELECT SYSTEM” screen. If “HVAC” is not
indicated,go to GI-38, "
CONSULT-II Data Link Connector (DLC)
Circuit" .
BBIA0369E
BCIA0029E
BCIA0030E
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TROUBLE DIAGNOSIS
SELF-DIAGNOSIS
Operation Procedure
1. Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE”
screentoviewallsetDTC's.
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BCIA0031E
Display Item List
DTC Description
B2573 Battery voltage out of range SC-4, "
B2575 BCM not responding to A/C request
B2576 BCM not responding to rear defroster r equest GW-95, "REAR WINDOW DEFOGGER"
B2577 Air mix door motor (Front) circuit failure
B2581 Intake sensor circuit short
B2582 Intake sensor circuit open
B2583 Defroster door motor circuit failure MTC-63, "
U1000 CAN bus fault LAN-7, "CAN COMMUNICATION"
B2586 Intake door motor (front) circuit malfunction MTC-60, "Intake Door Motor Circuit"
B2587 Stuck button MTC-95, "CONTROL UNIT"
B2588 Mode door motor circuit failure MTC-52, "Mode Door Motor Circuit"
BATTERY"
MTC-75, "
CLUTCH"
MTC-58, "
MOTOR (FRONT)"
MTC-60, "
DIAGNOSTIC PROCEDURE FOR MAGNET
DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
Intake Door Motor Circuit"
Defroster Door Motor Circuit"
Reference page
DATA MONITOR
Operation Procedure
1. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
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BCIA0031E
2. Touch either “MAIN SIGNALS” or “SELECTION FROM MENU” on “DATA MONITOR” screen.
All signals Monitors all the items.
Selection from menu Selects and monitors the individual item selected.
3. When “SELECTION FROM MENU” is selected, touch items to be monitored. When “MAIN SIGNALS” is
selected, all the items will be monitored.
4. Touch “START”.
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TROUBLE DIAGNOSIS
5. Touch “RECORD” while monitoring, then the status of the monitored item can be recorded. To stop
recording, touch “STOP”.
Display Item List
Monitoritem Value Contents
BATTVIA CAN "V" Displays battery voltage signal.
IGN VIA CAN "ON/OFF" Displays ignition switch signal.
EVAPTEMP SEN "°C/°F" Displays intake sensor signal.
RR TEMPSET FR "V" Displays air mix door (front) set point signal.
MODE FDBCK "V" Displays mode door motor feedback signal.
DVR MIX FDBCK "V" Displays air mix door motor (front) feedback signal.
DEF FDBCK "V" Displays defroster door motor feedback signal.
RECIRC "ON/OFF" Displays recirculation switch signal.
A/C "ON/OFF" Displays A/C switch signal.
RR DEFOG "ON/OFF" Displays rear defroster request signal.
"[PNL]"
"[MIX]"
MODE SELECT
*: DENT is displayed when MODE switch is between selections.
"[FLR]"
"[DEFR]"
"[MAX]"
" [ DENT ]"
Displays mode door motor posi tion.
Revision: October 2004 2005 Titan
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