air INFINITI FX35 2005 Service Manual

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COMPONENT INSPECTION ...........................
.. 112
Intake Sensor Circuit ........................................... .. 113
COMPONENT DESCRIPTION ........................ .. 113
DIAGNOSIS PROCEDURE FOR INTAKE SEN-
SOR ................................................................. .. 113
COMPONENT INSPECTION ........................... .. 114
CONTROLLER ...................................................... ..115
Removal and Installation of A/C and AV Switch .. .. 115
REMOVAL ........................................................ .. 115
INSTALLATION ................................................ .. 115
AUTO AMP ............................................................ ..116
Removal and Installation of Unified Meter and A/C
Amp. .................................................................... .. 116
REMOVAL ........................................................ .. 116
INSTALLATION ................................................ .. 116
AMBIENT SENSOR ............................................... ..117
Removal and Installation ..................................... .. 117
REMOVAL ........................................................ .. 117
INSTALLATION ................................................ .. 117
IN-VEHICLE SENSOR ........................................... ..118
Removal and Installation ..................................... .. 118
REMOVAL ........................................................ .. 118
INSTALLATION ................................................ .. 118
SUNLOAD SENSOR ............................................. ..119
Removal and Installation ..................................... .. 119
REMOVAL ........................................................ .. 119
INSTALLATION ................................................ .. 119
INTAKE SENSOR .................................................. . 120
Removal and Installation ..................................... . 120
REMOVAL ........................................................ . 120
INSTALLATION ................................................ . 120
BLOWER UNIT ...................................................... . 121
Removal and Installation ..................................... . 121
REMOVAL ........................................................ . 121
INSTALLATION ................................................ . 121
Disassembly and Assembly ................................ . 122
BLOWER MOTOR ................................................. . 123
Removal and Installation ..................................... . 123
REMOVAL ........................................................ . 123
INSTALLATION ................................................ . 123
INTAKE DOOR MOTOR ........................................ . 124
Removal and Installation ..................................... . 124
REMOVAL ........................................................ . 124
INSTALLATION ................................................ . 124
IN-CABIN MICROFILTER ...................................... . 125
Removal and Installation ..................................... . 125
FUNCTION ....................................................... . 125
REPLACEMENT TIMING ................................. . 125
REPLACEMENT PROCEDURES .................... . 125
HEATER & COOLING UNIT ASSEMBLY ............. . 126
Removal and Installation ..................................... . 126
REMOVAL ........................................................ . 126
INSTALLATION ................................................ . 127
Disassembly and Assembly ................................ . 129
MODE DOOR MOTOR .......................................... . 131
Removal and Installation ..................................... . 131
REMOVAL ........................................................ . 131
INSTALLATION ................................................ . 131 AIR MIX DOOR MOTOR ........................................
.132
Removal and Installation ..................................... .132
REMOVAL ........................................................ .132
INSTALLATION ................................................ .132
HEATER CORE ...................................................... .133
Removal and Installation ..................................... .133
REMOVAL ........................................................ .133
INSTALLATION ................................................ .133
DUCTS AND GRILLES .......................................... .134
Removal and Installation ..................................... .134
REMOVAL ........................................................ .134
INSTALLATION ................................................ .137
REFRIGERANT LINES .......................................... .138
HFC-134a (R-134a) Service Procedure .............. .138
SETTING OF SERVICE TOOLS AND EQUIP-
MENT ............................................................... .138
Components ........................................................ .140
VQ35DE ........................................................... .140
VK45DE ............................................................ .141
Removal and Installation of Compressor ............. .141
REMOVAL ........................................................ .141
INSTALLATION ................................................ .143
Removal and Installation of Compressor Clutch . .144
REMOVAL ........................................................ .144
INSTALLATION ................................................ .146
Removal and Installation of Low-Pressure Flexible
Hose .................................................................... .148
REMOVAL ........................................................ .148
INSTALLATION ................................................ .149
Removal and Installation of High-Pressure Flexible
Hose .................................................................... .149
REMOVAL ........................................................ .149
INSTALLATION ................................................ .150
Removal and Installation of Low-Pressure Pipe 1
(Engine Compartment) ........................................ .150
REMOVAL ........................................................ .150
INSTALLATION ................................................ .151
Removal and Installation of High-Pressure Pipe 1
and 2 (Engine Compartment) .............................. .151
REMOVAL ........................................................ .151
INSTALLATION ................................................ .152
Removal and Installation of Low-Pressure Pipe 2
and High-Pressure Pipe 3 ................................... .152
REMOVAL ........................................................ .152
INSTALLATION ................................................ .153
Removal and Installation of Liquid Tank .............. .154
REMOVAL ........................................................ .154
INSTALLATION ................................................ .154
Removal and Installation of Condenser ............... .155
REMOVAL ........................................................ .155
INSTALLATION ................................................ .155
Removal and Installation of Refrigerant Pressure
Sensor ................................................................. .156
REMOVAL ........................................................ .156
INSTALLATION ................................................ .156
Removal and Installation of Evaporator ............... .156
REMOVAL ........................................................ .156
INSTALLATION ................................................ .156
Removal and Installation of Expansion Valve ...... .157

PRECAUTIONS ATC-5
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PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
AJS001XF
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:

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.

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.
Precautions Necessary for Steering Wheel Rotation After Battery DisconnectAJS001XG
NOTE:

This Procedure is applied only to models with Intelligent Key system and NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS).

Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″ LOCK ″ position.

Always use CONSULT-II to perform self-diagnosis as a part of each function inspection after finishing
work. If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NVIS/IVIS, an electrically controlled steering lock
mechanism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT-II.

PRECAUTIONS ATC-7
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CONTAMINATED REFRIGERANT
If a refrigerant other than pure HFC-134a (R-134a) is identified in a vehicle, take appropriate steps
shown below:

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 service equipment and refrigerant
supply.

Suggest the customer return the vehicle to the location of previous service where the contamination may
have occurred.

In case of repairing, recover the refrigerant using only dedicated equipment and containers. Never
recover contaminated refrigerant into the existing service equipment. If the facility does not have
dedicated recovery equipment, contact a local refrigerant product retailer for available service. This refrig-
erant 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 Nissan Cus-
tomer Affairs for further assistance.
General Refrigerant PrecautionsAJS001XJ
WARNING:

Never 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.

Never store or heat refrigerant containers above 52 °C (125 °F).

Never 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.

Never 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.

Never pressure test or leak test HFC-134a (R-134a) service equipment and/or vehicle air condition-
ing 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.

ATC-12
PRECAUTIONS
Revision: 2005 July 2005 FX
CAUTION:
The new and former refrigerant connections use different O-ring configurations. Never confuse O-
rings 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
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 way as it is when mounted on the car. Fail-
ure 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 at the final stage of the opera-
tion. Never remove the seal caps of pipes and other components until just before required for con-
nection.

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.

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 a click can be heard, then tighten the nut or bolt by hand until snug. Make sure
that the O-ring is installed to tube correctly.
Connection type Piping connection point Part number QTY O-ring size
New Low-pressure pipe 1 to low-pressure pipe 2 (One-touch joint) 92473 N8221 2 16
Low-pressure pipe 2 to expansion valve 92473 N8210 1 16
High-pressure pipe 1 to high-pressure pipe 2 (One-touch joint) 92471 N8221 2 8
High-pressure pipe 3 to expansion valve 92471 N8210 1 8
High-pressure pipe 2 to high-pressure pipe 3 (One-touch joint) 92471 N8221 2 8
Condenser to high-pressure flexible hose (One-touch joint) 92472 N8221 2 12
Condenser to high-pressure pipe 1 (One-touch joint) 92471 N8221 2 8
Low-pressure flexible hose to low-pressure pipe 1 (One-touch joint) 92473 N8221 2 16
Compressor to low-pressure flexible hose 92474 N8210 1 19
Compressor to high-pressure flexible hose 92472 N8210 1 12
Liquid tank to condenser pipe Inlet
92471 N8210 1
8
Outlet 1
Former Refrigerant pressure sensor to condenser J2476 89956 1 10
Expansion valve to evaporator Inlet 92475 71L00 1 12
Outlet 92475 72L00 1 16
Lubricant name : Nissan A/C System Oil Type S
Part number : KLH00-PAGS0

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After connecting line, perform leak test and make sure that there is no leakage from connections.
When the refrigerant leaking point is found, disconnect that line and replace the O-ring. Then
tighten connections of seal seat to the specified torque.
Precautions for Servicing CompressorAJS001XM

Plug all openings to prevent moisture and foreign matter from entering.

When the compressor is removed, store it in the same way as it is when mounted on the car.

When replacing or repairing compressor, follow “Maintenance of Lubricant Quantity in Compres-
sor” exactly. Refer to AT C - 2 7 , "
Maintenance of Lubricant Quantity in Compressor" .

Keep friction surfaces between clutch and pulley clean. If the surface is contaminated with lubri-
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 five 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 one hour.

After replacing the compressor magnet clutch, apply voltage to the new one and check for normal
operation.
Precautions for Service EquipmentAJS001XN
RECOVERY/RECYCLING EQUIPMENT
Be certain to 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
Be certain to follow the manufacturer’s instructions for tester operation and tester maintenance.
RHA861F

PRECAUTIONS ATC-15
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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. However, if an
improper connection is attempted, discharging and contamination
may occur.
REFRIGERANT WEIGHT SCALE
Verify that no refrigerant other than HFC-134a (R-134a) and speci-
fied lubricants have been used with the scale. If the scale controls
refrigerant flow electronically, the hose fitting must be 1/2
″ -16
ACME.
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.
Shut-off valve rotation A/C service valve
Clockwise Open
Counterclockwise Close
RHA273D
RHA274D

ATC-16
PRECAUTIONS
Revision: 2005 July 2005 FX
Precautions for Leak Detection DyeAJS001XO

The A/C system contains a fluorescent leak detection dye used for locating refrigerant leaks. An ultraviolet
(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 (SST:
J-41995) to pin-point refrigerant leaks.

For your safety and your customer’s satisfaction, read and follow all manufacture ′s operating instructions
and precautions prior to performing the 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 (SST: J-
41995).

Always remove any remaining dye from the leak area after repairs are completed to avoid a misdiagnosis
during a future service.

Never 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.

Never spray the fluorescent dye cleaning agent on hot surfaces (engine exhaust manifold, etc.).

Never 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. Never use
HFC-134a (R-134a) leak detection dye in CFC-12 (R-12) A/C system or CFC-12 (R-12) leak detection
dye in HFC-134a (R-134a) A/C system, or A/C system damage may result.

The fluorescent properties of the dye will remain for three years or little over unless a compressor mal-
function occurs.
IDENTIFICATION
NOTE:
Vehicles with factory installed fluorescent dye have a green label.
Vehicles without factory installed fluorescent dye have a blue label.
IDENTIFICATION LABEL FOR VEHICLE
Vehicles with factory installed fluorescent dye have this identification
label on the front side of hood.
SHA436FA

ATC-20
PREPARATION
Revision: 2005 July 2005 FX
Commercial Service ToolsAJS00145
Service hoses

High-pressure side hose
(J-39501-72)

Low-pressure side hose
(J-39502-72)

Utility hose
(J-39476-72) Hose color:

Low hose: Blue with black stripe

High hose: Red with black stripe

Utility hose: Yellow with black stripe
or green with black stripe
Hose fitting to gauge:

1/2″ -16 ACME
Service couplers

High-pressure side coupler
(J-39500-20)

Low-pressure side coupler
(J-39500-24) Hose fitting to service hose:

M14 x 1.5 fitting is optional or
permanently attached.
(J-39650)
Refrigerant weight scale For measuring of refrigerant
Fitting size: Thread size

1/2″ -16 ACME
(J-39649)
Vacuum pump
(Including the isolator valve) Capacity:

Air displacement: 4 CFM

Micron rating: 20 microns

Oil capacity: 482 g (17 oz.)
Fitting size: Thread size

1/2″ -16 ACME
Tool number
(Kent-Moore No.)
Tool name Description
S-NT201
S-NT202
S-NT200
S-NT203
Tool name
Description
Refrigerant identifier equipment Checking for refrigerant purity and
system contamination
Power tool For loosening bolts and nuts
RJIA0197E
PBIC0190E

REFRIGERATION SYSTEM ATC-21
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REFRIGERATION SYSTEMPFP:KA990
Refrigerant CycleAJS00146
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 is
controlled by an externally equalized expansion valve, located inside the evaporator case.
FREEZE PROTECTION
To prevent evaporator frozen up, the evaporator air temperature is monitored, and the voltage signal to the
unified meter and A/C auto amp. will make the A/C relay go OFF and stop the compressor.
Refrigerant System ProtectionAJS00147
REFRIGERANT PRESSURE SENSOR
The refrigerant system is protected against excessively high- or low-pressure by the refrigerant pressure sen-
sor, located on the condenser. If the system pressure rises above, or falls below the specifications, the refrig-
erant pressure sensor detects the pressure inside the refrigerant line and sends the voltage signal to the ECM.
ECM makes the A/C relay go OFF and stops the compressor when pressure on the high-pressure side
detected by refrigerant pressure sensor is over about 2,746 kPa (28 kg/cm
2 , 398 psi), or below about 134 kPa
(1.4 kg/cm
2 , 20 psi).
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 unusual level [more than 3,727 kPa (38 kg/cm
2
, 540 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant into the
atmosphere.
RJIA0849E

ATC-22
REFRIGERATION SYSTEM
Revision: 2005 July 2005 FX
V-6 Variable Displacement CompressorAJS001BE
GENERAL INFORMATION
1. The V-6 variable compressor differs from previous units. The vent temperatures of the V-6 variable com-
pressor do not drop too far below 5 °C (41 °F) when:
Evaporator intake air temperature is less than 20 °C (68 °F).
Engine is running at speeds less than 1,500 rpm.
This is because the V-6 compressor provides a means of “capacity” control.
2. The V-6 variable compressor provides refrigerant control under varying conditions. During cold winters, it may not produce high refrigerant pressure discharge (compared to previous units) when used with air
conditioning systems.
3. A “clanking” sound may occasionally be heard during refrigerant charge. The sound indicates that the tilt angle of the wobble (swash) plate has changed and is not a malfunction.
4. For air conditioning systems with the V-6 compressor, the clutch remains engaged unless: the system main switch, fan switch or ignition switch is turned OFF. When ambient (outside) temperatures are low or
when the amount of refrigerant is insufficient, the clutch is disengaged to protect the compressor.