cooling INFINITI FX35 2007 Service Manual

ABCDEFGHIJKMLQUICK REFERENCE INDEX AGENERAL INFORMATIONGIGeneral InformationBENGINEEMEngine MechanicalLUEngine Lubrication SystemCOEngine Cooling SystemECEngine Control SystemFLFuel SystemEXExhaust SystemACCAccelerator Control SystemCTRANSMISSION/
TRANSAXLEATAutomatic TransmissionDDRIVELINE/AXLETFTransferPRPropeller ShaftFFDFront Final DriveRFDRear Final DriveFAXFront AxleRAXRear AxleESUSPENSIONFSUFront SuspensionRSURear SuspensionWTRoad Wheels & TiresFBRAKESBRBrake SystemPBParking Brake SystemBRCBrake Control SystemGSTEERINGPSPower Steering SystemHRESTRAINTSSBSeat BeltsSRSSupplemental Restraint System
(SRS)IBODYBLBody, Lock & Security SystemGWGlasses, Window System & Mir-
rorsRFRoofEIExterior & InteriorIPInstrument PanelSESeatJAIR CONDITIONERATCAutomatic Air ConditionerKELECTRICALSCStarting & Charging SystemLTLighting SystemDIDriver Information SystemWWWiper, Washer & HornBCSBody Control SystemLANLAN SystemAVAudio Visual, Navigation & Tele-
phone SystemACSAuto Cruise Control SystemPGPower Supply, Ground & Circuit Ele-
mentsLMAINTENANCEMAMaintenanceMINDEXIDXAlphabetical IndexEdition: July 2006
Revision: July 2006

QUICK REFERENCE CHART FX35/FX45
QUICK REFERENCE CHART FX35/FX45PFP:00000
ENGINE TUNE-UP DATA (VQ35DE)ELS0003W
Engine modelVQ35DE
Firing order1-2-3-4-5-6
Idle speed
A/T (In “P” or “N” position)rpm
650 ± 50
Ignition timing (BTDC at idle speed)
A/T (In “P” or “N” position)15° ± 5°
Drive BeltDeflection adjustment Unit: mm (in) Tension adjustment Unit: N (kg, lb)
Used belt
New beltUsed belt
New belt
Limit After adjustment Limit After adjustment
Alternator and power
steering oil pump belt7 (0.28)4 - 5
(0.16 - 0.20)3.5 - 4.5
(0.138 - 0.177)294 (30, 66)730 - 818
(74.5 - 83.5,
164 - 184)838 - 926
(85.5 - 94.5,
188 - 208)
A/C compresor belt 12 (0.47)9 - 10
(0.35 - 0.39)8 - 9
(0.31 - 0.35)196 (20, 44)348 - 436
(35.5 - 44.5,
78 - 98)470 - 559
(47.9 - 57.0,
106 - 126)
Applied pushing force 98N (10kg, 22lb) —
Radiator cap relief pressure
kPa (kg/cm
2 , psi)
Standard 78 - 98 (0.8 - 1.0, 11 - 14)
Limit 59 (0.6, 9)
Cooling system leakage testing pres-
surekPa (kg/cm
2 , psi)157 (1.6, 23)
Compression pressure
kPa (kg/cm
2 , psi)/rpm
Standard 1,275 (13.0, 185) /300
Minimum 981 (10.0, 142) /300
Spark plug Standard type PLFR5A-11
Hot type PLFR4A-11
Cold type PLFR6A-11
2007

QUICK REFERENCE CHART FX35/FX45
ENGINE TUNE-UP DATA (VK45DE)
FRONT WHEEL ALIGNMENT (Unladen* )
ELS0003X
* : Fuel, engine coolant and engine oil full. Spare tire, jack, hand tools and mats in designated positions.Engine modelVK45DE
Firing order1-8-7-3-6-5-4-2
Idle speed
A/T (In “P” or “N” position) rpm650 ± 50
Ignition timing
(BTDC at idle speed)12° ± 5°
Tensions of drive belts Auto adjustment by auto tensioner
Radiater cap relief pressure
kPa (kg/cm
2 , psi)
78 - 98 (0.8-1.0 , 11-14) Standard
Limit 59 (0.6, 9)
Cooling system leakage testing pressure
157 (1.6, 23)
kPa (kg/cm
2 , psi)
Compression pressure
kPa (kg/cm
2 , psi)/rpm
1,320 (13.5, 191) /300 Standard
Minimum 1,130 (11.5, 164) /300
Spark plug Standard type PLFR5A-11
Hot type PLFR4A-11
Cold type PLFR6A-11
Camber Degree minute (Decimal degree) Minimum –1° 29′ (–1.48°)
Nominal –0° 44′ (–0.73°)
Maximum 0° 01′ (0.02°)
Left and right difference 45′ (0.75°) or less
Caster Degree minute (Decimal degree) Minimum 3° 02′ (3.03°)
Nominal 3° 47′ (3.78°)
Maximum 4° 32′ (4.53°)
Left and right difference 45′ (0.75°) or less
Kingpin inclination Degree minute (Decimal degree) Minimum 12° 20′ (12.33°)
Nominal 13° 05′ (13.08°)
Maximum 13° 50′ (13.83°)
Total toe-in Distance Minimum 0.6 mm (0.024 in)
Nominal 1.6 mm (0.063 in)
Maximum 2.6 mm (0.102 in)
Angle (left wheel or right wheel)
Degree minute (Decimal degree)Minimum 0° 01′ (0.02°)
Nominal 0° 04′ (0.06°)
Maximum 0° 06′ (0.10°)
Wheel turning angle (Full turn) Inside Minimum 32° 00 (32.0°)
Degree minute (Decimal degree) Nominal 35° 00 (35.0°)
Maximum 36° 00 (36.0°)
Outside
Nominal 30° 00 (30.0°)
Degree minute (Decimal degree)
2007

ACS-66
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: 2006 July 2007 FX35/FX45
DTC 104 LASER AIMING INCMPNKS003FN
1. CHECK DIAGNOSIS
1. Adjust laser beam aiming. Erase DTC and perform ICC system running test.
2. After that, perform self-diagnosis of ICC system.
3. Check if “DTC 104 LASER AIMING INCMP” is indicated.
Is it indicated?
YES >> 1. Replace ICC sensor, and adjust laser beam aiming. 2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NO >> INSPECTION END
DTC 107 LASER COMM FAILNKS003FO
1. CHECK ICC UNIT SELF-DIAGNOSIS
1. Perform self-diagnosis.
2. Check if “DTC 11 CONTROL UNIT” or “DTC 20 CAN COMM CIRCUIT” item other than “DTC 107 LASER COMM FAIL” is indicated in the self-diagnosis item in the display.
Is any indicated?
YES >> Go to applicable item inspection. Refer to ACS-44, "DTC 11 CONTROL UNIT" , and ACS-44,
"DTC 20 CAN COMM CIRCUIT" .
NO >> 1. Replace ICC sensor, and adjust laser beam aiming.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
DTC 109 LASER HIGH TEMPNKS003FP
1. CHECK SYMPTOM
Check if cooling system malfunctions.
Does it malfunction?
YES >> 1. Repair cooling system. 2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NO >> 1. Replace ICC sensor, and adjust laser beam aiming. 2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.

AT-8
PRECAUTIONS
Revision: 2006 July 2007 FX35/FX45
Precautions NCS001AP

Before connecting or disconnecting the A/T assembly har-
ness connector, turn ignition switch OFF and disconnect
the battery cable from the negative terminal. Because bat-
tery voltage is applied to TCM even if ignition switch is
turned OFF.

After performing each TROUBLE DIAGNOSIS, perform
“DTC (Diagnostic Trouble Code) Confirmation Procedure”.
If the repair is completed the DTC should not be displayed
in the “DTC Confirmation Procedure”.

Always use the specified brand of ATF. Refer to MA-12, "Fluids and Lubricants" .

Use lint-free paper not cloth rags during work.

After replacing the ATF, dispose of the waste oil using the methods prescribed by law, ordinance, etc.

Before proceeding with disassembly, thoroughly clean the outside of the transmission. It is important to
prevent the internal parts from becoming contaminated by dirt or other foreign matter.

Disassembly should be done in a clean work area.

Use lint-free paper or towels for wiping parts clean. Common shop rags can leave fibers that could inter-
fere with the operation of the transmission.

Place disassembled parts in order for easier and proper assembly.

All parts should be carefully cleansed with a general purpose, non-flammable solvent before inspection or
reassembly.

Gaskets, seals and O-rings should be replaced any time the transmission is disassembled.

It is very important to perform functional tests whenever they are indicated.

The valve body contains precision parts and requires extreme care when parts are removed and serviced.
Place disassembled valve body parts in order for easier and proper assembly. Care will also prevent
springs and small parts from becoming scattered or lost.

Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own weight.

Before assembly, apply a coat of recommended ATF to all parts. Apply petroleum jelly to protect O-rings
and seals, or hold bearings and washers in place during assembly. Do not use grease.

Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.

After overhaul, refill the transmission with new ATF.

When the A/T drain plug is removed, only some of the ATF is drained. Old ATF will remain in torque con-
verter and ATF cooling system.
Always follow the procedures under “Changing A/T Fluid” in the AT section when changing A/T fluid. Refer
to AT- 1 2 , "
Changing A/T Fluid" , AT- 1 3 , "Checking A/T Fluid" .
SEF289H
SEF217U

AT-14
A/T FLUID
Revision: 2006 July 2007 FX35/FX45
CAUTION:

When wiping away the A/T fluid level gauge, always use lint-free paper, not a cloth one.

To check A/T fluid level, insert the A/T fluid level gauge
until the cap contacts the end of the A/T fluid charging
pipe, with the A/T fluid level gauge reversed from the nor-
mal attachment conditions as shown.
8. Check A/T fluid condition.

If ATF is very dark or smells burned, check operation of A/T.
Flush cooling system after repair of A/T.

If ATF contains frictional material (clutches, bands, etc.),
replace radiator and flush cooler line using cleaning solvent
and compressed air after repair of A/T. Refer to CO-14,
"RADIATOR" (for VQ35DE) or CO-41, "RADIATOR" (for
VK45DE) and AT- 1 5 , "
A/T Fluid Cooler Cleaning" .
9. Install the removed A/T fluid level gauge in the A/T fluid charging pipe.
10. Tighten level gauge bolt.
Level gauge bolt: : 5.1 N·m (0.52 kg-m, 45 in-lb)
SCIA2899E
SCIA4896E

A/T CONTROL SYSTEM AT-39
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Revision: 2006 July 2007 FX35/FX45
FUNCTION OF ATF PRESSURE SWITCH
Input clutch control valve When the input clutch is coupled, adjusts the line pressure to the optimum pressure
(input clutch pressure) and supplies it to the input clutch. (In 4th and 5th gears, adjusts
the clutch pressure.)
Direct clutch control valve When the direct clutch is coupled, adjusts the line pressure to the optimum pressure
(direct clutch pressure) and supplies it to the direct clutch. (In 2nd, 3rd, and 4th gears,
adjusts the clutch pressure.)
TCC control valve
TCC control plug
TCC control sleeve Switches the lock-up to operating or released. Also, by performing the lock-up operation
transiently, lock-up smoothly.
Torque converter lubrication valve Operates during lock-up to switch the torque converter, cooling, and lubrication system
oil passage.
Cool bypass valve Allows excess oil to bypass cooler circuit without being fed into it.
Line pressure relief valve Discharges excess oil from line pressure circuit.
N-D accumulator Produces the stabilizing pressure for when N-D is selected.
Manual valve Sends line pressure to each circuit according to the select position. The circuits to which
the line pressure is not sent drain.
Name Function
Name Function
ATF pressure switch 1 (FR/B) Detects any malfunction in the front brake hydraulic pressure. When it detects any mal-
function, it puts the system into fail-safe mode.
ATF pressure switch 2 (LC/B) Detects any malfunction in the low coast brake hydraulic pressure. When it detects any
malfunction, it puts the system into fail-safe mode.
ATF pressure switch 3 (I/C) Detects any malfunction in the input clutch hydraulic pressure. When it detects any mal-
function, it puts the system into fail-safe mode.
ATF pressure switch 5 (D/C) Detects any malfunction in the direct clutch hydraulic pressure. When it detects any mal-
function, it puts the system into fail-safe mode.
ATF pressure switch 6 (HLR/C) Detects any malfunction in the high and low reverse clutch hydraulic pressure. When it
detects any malfunction, it puts the system into fail-safe mode.

ATC-2Revision: 2006 July 2007 FX35/FX45
A/C SWITCH ....................................................
... 35
MODE SWITCH ................................................ ... 35
FAN SWITCH ................................................... ... 35
DUAL SWITCH ................................................. ... 35
Fail-safe Function ................................................ ... 36
Discharge Air Flow .............................................. ... 37
System Description .............................................. ... 38
SWITCHES AND THEIR CONTROL FUNCTION ... 38
CAN Communication System Description ........... ... 39
TROUBLE DIAGNOSIS ......................................... ... 40
CONSULT-II Function (BCM) ............................... ... 40
CONSULT-II BASIC OPERATION .................... ... 40
DATA MONITOR ............................................... ... 40
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ................................................... ... 40
WORK FLOW ................................................... ... 40
SYMPTOM TABLE ........................................... ... 41
Component Parts and Harness Connector Location ... 42
ENGINE COMPARTMENT ............................... ... 42
PASSENGER COMPARTMENT ....................... ... 43
Schematic ............................................................ ... 44
Wiring Diagram — A/C — .................................... ... 45
Auto Amp. Terminals and Reference Value ......... ... 50
PIN CONNECTOR TERMINAL LAYOUT ......... ... 50
TERMINALS AND REFERENCE VALUE FOR
UNIFIED METER AND A/C AMP. ..................... ... 50
Self-diagnosis Function ....................................... ... 52
DESCRIPTION ................................................. ... 52
FUNCTION CONFIRMATION PROCEDURE ... ... 53
AUXILIARY MECHANISM: TEMPERATURE
SETTING TRIMMER ........................................ ... 58
AUXILIARY MECHANISM: FOOT POSITION
SETTING TRIMMER ........................................ ... 59
AUXILIARY MECHANISM: INLET PORT MEM-
ORY FUNCTION .............................................. ... 59
Operational Check ............................................... ... 60
CHECKING MEMORY FUNCTION .................. ... 60
CHECKING BLOWER ...................................... ... 60
CHECKING DISCHARGE AIR ......................... ... 60
CHECKING INTAKE AIR .................................. ... 60
CHECKING TEMPERATURE DECREASE ...... ... 60
CHECKING TEMPERATURE INCREASE ....... ... 60
CHECKING A/C SWITCH ................................ ... 61
CHECKING AUTO MODE ................................ ... 61
Power Supply and Ground Circuit for Auto Amp. ... 62 INSPECTION FLOW ........................................ ... 62
COMPONENT DESCRIPTION ......................... ... 62
DIAGNOSIS PROCEDURE FOR A/C SYSTEM ... 63
LAN System Circuit ............................................. ... 64
DIAGNOSIS PROCEDURE FOR LAN CIRCUIT ... 64
Mode Door Motor Circuit ..................................... ... 68
INSPECTION FLOW ........................................ ... 68
SYSTEM DESCRIPTION ................................. ... 69
COMPONENT DESCRIPTION ......................... ... 70
DIAGNOSIS PROCEDURE FOR MODE DOOR
MOTOR ............................................................ ... 70
Air Mix Door Motor Circuit ................................... ... 71
INSPECTION FLOW ........................................ ... 71 SYSTEM DESCRIPTION ..................................
... 72
COMPONENT DESCRIPTION ......................... ... 73
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR
MOTOR ............................................................. ... 73
Air Mix Door Motor PBR Circuit ........................... ... 73
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR
MOTOR PBR .................................................... ... 73
Intake Door Motor Circuit ..................................... ... 74
INSPECTION FLOW ......................................... ... 74
SYSTEM DESCRIPTION .................................. ... 75
COMPONENT DESCRIPTION ......................... ... 76
DIAGNOSIS PROCEDURE FOR INTAKE DOOR
MOTOR ............................................................. ... 76
Blower Motor Circuit ............................................. ... 77
INSPECTION FLOW ......................................... ... 77
SYSTEM DESCRIPTION .................................. ... 78
COMPONENT DESCRIPTION ......................... ... 79
DIAGNOSIS PROCEDURE FOR BLOWER
MOTOR ............................................................. ... 79
COMPONENT INSPECTION ............................ ... 81
Magnet Clutch Circuit ........................................... ... 82
INSPECTION FLOW ......................................... ... 82
SYSTEM DESCRIPTION .................................. ... 83
DIAGNOSIS PROCEDURE FOR MAGNET
CLUTCH ........................................................... ... 83
COMPONENT INSPECTION ............................ ... 89
Insufficient Cooling ............................................... ... 90
INSPECTION FLOW ......................................... ... 90
PERFORMANCE TEST DIAGNOSIS ............... ... 92
PERFORMANCE CHART ................................. ... 94
TROUBLE DIAGNOSIS FOR UNUSUAL PRES-
SURE ................................................................ ... 95
DIAGNOSIS PROCEDURE FOR INSUFFI-
CIENT COOLING .............................................. ... 97
Insufficient Heating .............................................. ... 99
INSPECTION FLOW ......................................... ... 99
Noise .................................................................... .100
INSPECTION FLOW ......................................... .100
Self-diagnosis ...................................................... .101
INSPECTION FLOW ......................................... .101
Memory Function ................................................. .102
INSPECTION FLOW ......................................... .102
Ambient Sensor Circuit ........................................ .103
COMPONENT DESCRIPTION ......................... .103
AMBIENT TEMPERATURE INPUT PROCESS .103
DIAGNOSIS PROCEDURE FOR AMBIENT
SENSOR ........................................................... .103
COMPONENT INSPECTION ............................ .105
In-vehicle Sensor Circuit ...................................... .106
COMPONENT DESCRIPTION ......................... .106
DIAGNOSIS PROCEDURE FOR IN-VEHICLE
SENSOR ........................................................... .107
COMPONENT INSPECTION ............................ .108
Sunload Sensor Circuit ........................................ .109
COMPONENT DESCRIPTION ......................... .109
SUNLOAD INPUT PROCESS .......................... .109
DIAGNOSIS PROCEDURE FOR SUNLOAD
SENSOR ........................................................... .109

ATC-3
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Revision: 2006 July 2007 FX35/FX45
COMPONENT INSPECTION ...........................
. . 111
Intake Sensor Circuit ........................................... .. 112
COMPONENT DESCRIPTION ........................ .. 112
DIAGNOSIS PROCEDURE FOR INTAKE SEN-
SOR ................................................................. .. 112
COMPONENT INSPECTION ........................... .. 113
CONTROLLER ...................................................... ..114
Removal and Installation of A/C and AV Switch .. .. 114
REMOVAL ........................................................ .. 114
INSTALLATION ................................................ .. 114
AUTO AMP ............................................................ ..115
Removal and Installation of Unified Meter and A/C
Amp. .................................................................... .. 115
REMOVAL ........................................................ .. 115
INSTALLATION ................................................ .. 115
AMBIENT SENSOR ............................................... ..116
Removal and Installation ..................................... .. 116
REMOVAL ........................................................ .. 116
INSTALLATION ................................................ .. 116
IN-VEHICLE SENSOR ........................................... ..117
Removal and Installation ..................................... .. 117
REMOVAL ........................................................ .. 117
INSTALLATION ................................................ .. 117
SUNLOAD SENSOR ............................................. ..118
Removal and Installation ..................................... .. 118
REMOVAL ........................................................ .. 118
INSTALLATION ................................................ .. 118
INTAKE SENSOR .................................................. ..119
Removal and Installation ..................................... .. 119
REMOVAL ........................................................ .. 119
INSTALLATION ................................................ .. 119
BLOWER UNIT ...................................................... . 120
Removal and Installation ..................................... . 120
REMOVAL ........................................................ . 120
INSTALLATION ................................................ . 120
Disassembly and Assembly ................................ . 121
BLOWER MOTOR ................................................. . 122
Removal and Installation ..................................... . 122
REMOVAL ........................................................ . 122
INSTALLATION ................................................ . 122
INTAKE DOOR MOTOR ........................................ . 123
Removal and Installation ..................................... . 123
REMOVAL ........................................................ . 123
INSTALLATION ................................................ . 123
IN-CABIN MICROFILTER ...................................... . 124
Removal and Installation ..................................... . 124
FUNCTION ....................................................... . 124
REPLACEMENT TIMING ................................. . 124
REPLACEMENT PROCEDURES .................... . 124
HEATER & COOLING UNIT ASSEMBLY ............. . 125
Removal and Installation ..................................... . 125
REMOVAL ........................................................ . 125
INSTALLATION ................................................ . 126
Disassembly and Assembly ................................ . 128
MODE DOOR MOTOR .......................................... . 130
Removal and Installation ..................................... . 130
REMOVAL ........................................................ . 130
INSTALLATION ................................................ . 130 AIR MIX DOOR MOTOR ........................................
.131
Removal and Installation ..................................... .131
REMOVAL ........................................................ .131
INSTALLATION ................................................ .131
HEATER CORE ...................................................... .132
Removal and Installation ..................................... .132
REMOVAL ........................................................ .132
INSTALLATION ................................................ .132
DUCTS AND GRILLES .......................................... .133
Removal and Installation ..................................... .133
COMPONENT LAYOUT ................................... .133
REMOVAL ........................................................ .133
INSTALLATION ................................................ .136
REFRIGERANT LINES .......................................... .137
HFC-134a (R-134a) Service Procedure .............. .137
SETTING OF SERVICE TOOLS AND EQUIP-
MENT ............................................................... .137
Components ........................................................ .139
VQ35DE ........................................................... .139
VK45DE ............................................................ .140
Removal and Installation of Compressor ............. .140
REMOVAL ........................................................ .140
INSTALLATION ................................................ .142
Removal and Installation of Compressor Clutch . .142
REMOVAL ........................................................ .142
INSTALLATION ................................................ .144
Removal and Installation of Low-pressure Flexible
Hose .................................................................... .146
REMOVAL ........................................................ .146
INSTALLATION ................................................ .147
Removal and Installation of High-pressure Flexible
Hose .................................................................... .147
REMOVAL ........................................................ .147
INSTALLATION ................................................ .148
Removal and Installation of Low-pressure Pipe 1
(Engine Compartment) ........................................ .148
REMOVAL ........................................................ .148
INSTALLATION ................................................ .149
Removal and Installation of High-pressure Pipe 1
and 2 (Engine Compartment) .............................. .149
REMOVAL ........................................................ .149
INSTALLATION ................................................ .150
Removal and Installation of Low-pressure Pipe 2
and High-pressure Pipe 3 .................................... .150
REMOVAL ........................................................ .150
INSTALLATION ................................................ .151
Removal and Installation of Liquid Tank .............. .152
REMOVAL ........................................................ .152
INSTALLATION ................................................ .152
Removal and Installation of Condenser ............... .153
REMOVAL ........................................................ .153
INSTALLATION ................................................ .154
Removal and Installation of Refrigerant Pressure
Sensor ................................................................. .154
REMOVAL ........................................................ .154
INSTALLATION ................................................ .154
Removal and Installation of Evaporator ............... .154
REMOVAL ........................................................ .154
INSTALLATION ................................................ .155

REFRIGERATION SYSTEM ATC-23
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DESCRIPTION
General
The variable compressor is a swash plate type that changes piston stroke in response to the required cooling
capacity.
The tilt of the wobble (swash) plate allows the piston’s stroke to change so that refrigerant discharge continu-
ously change from 14.5 to 184 cm
3 (0.885 to 11.228 cu in).
RJIA1260E