2007 INFINITI FX35 check engine

AT-268
TRANSMISSION ASSEMBLY
Revision: 2006 July 2007 FX35/FX45
INSTALLATION
Install the removed parts in the reverse order of the removal, while paying attention to the following work.

When installing A/T assembly to the engine assembly, attach the
fixing bolts in accordance with the following standard.

Align the positions of tightening bolts for drive plate with those of
the torque converter, and temporarily tighten the bolts. Then,
tighten the bolts with the specified torque. Refer to AT- 2 6 6 ,
"COMPONENTS" .
CAUTION:

Do not reuse O-ring and copper washers.

When turning crankshaft, turn it clockwise as viewed from
the front of the engine.

When tightening the tightening bolts for the torque con-
verter after fixing the crankshaft pulley bolts, be sure to
confirm the tightening torque of the crankshaft pulley
mounting bolts. Refer to EM-72, "
INSTALLATION" .

After converter is installed to drive plate, rotate crankshaft several turns and check to be sure that
transmission rotates freely without binding.

Install crankshaft position sensor (POS). Refer to EM-30, "Removal and Installation (2WD Models)" .

After completing installation, check A/T fluid leakage, A/T fluid level, and the A/T positions of A/T. Refer to
AT- 1 3 , "
Checking A/T Fluid" , AT- 2 3 1 , "Checking of A/T Position" .
Bolt No. 1 2 3 4
Number of bolts 1 5 2 2
Bolt length
“ ”mm (in) 55 (2.17) 65 (2.56) 65 (2.56) 35 (1.38)
Tightening torque
N·m (kg-m, ft-lb) 75
(7.7, 55) 55
(5.6, 41) 47
(4.8, 35)
SCIA3949E
SCIA2288E

AT-272
TRANSMISSION ASSEMBLY
Revision: 2006 July 2007 FX35/FX45
26. Remove A/T assembly with transfer from vehicle.

Secure torque converter to prevent it from dropping.

Secure A/T assembly to a jack.
27. Remove transfer from A/T assembly. Refer to TF-44, "
Removal
and Installation" .
INSPECTION
Installation and Inspection of Torque Converter

After inserting a torque converter to a A/T, be sure to check dis-
tance “A” to ensure it is within the reference value limit.
INSTALLATION
Install the removed parts in the reverse order of the removal, while paying attention to the following work.

When installing A/T assembly to the engine assembly, attach the fixing bolts in accordance with the follow-
ing standard.
For VQ35DE models
For VK45DE models
*1 : No.2 bolt also secures A/T fluid charging pipe and washer.
*2 : No.4 bolt also secures bracket.
(A) : A/T to engine
SCIA2203E
Distance “A”
VQ35DE models : 25.0 mm (0.98 in) or more
VK45DE models : 22.0 mm (0.87 in) or more
SAT017B
Bolt No. 1 2 3 4
Number of bolts 1 5 2 1
Bolt length
“ ”mm (in) 55 (2.17) 65 (2.56) 35 (1.38) 40 (1.57)
Tightening torque
N·m (kg-m, ft-lb) 75
(7.7, 55) 47
(4.8, 35) 34
(3.5, 25)
SCIA4600E
Bolt No. 1 2*134*2
Number of bolts 4141
Bolt length mm (in) 70 (2.76) 70 (2.76) 65 (2.56) 70 (2.76)
Tightening torque
N·m (kg-m, ft-lb) 11 3
(12, 83) 74.0
(7.5, 55) 11 3
(12,83)
SCIA7756E

TRANSMISSION ASSEMBLY AT-273
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Revision: 2006 July 2007 FX35/FX45

Align the positions of tightening bolts for drive plate with those of
the torque converter, and temporarily tighten the bolts. Then,
tighten the bolts with the specified torque. Refer to AT- 2 6 9 ,
"COMPONENTS (FOR VQ35DE)" or AT- 2 7 0 , "COMPONENTS
(FOR VK45DE)" .
CAUTION:

Do not reuse O-ring and copper washers.

When turning crankshaft, turn it clockwise as viewed from
the front of the engine.

When tightening the tightening bolts for the torque con-
verter after fixing the crankshaft pulley bolts, be sure to
confirm the tightening torque of the crankshaft pulley
mounting bolts. Refer to EM-72, "
INSTALLATION" (for VQ35DE) or EM-208, "INSTALLATION" (for
VK45DE)

After converter is installed to drive plate, rotate crankshaft several turns and check to be sure that
transmission rotates freely without binding.

Install crankshaft position sensor (POS). Refer to EM-35, "Components (AWD Models)" (for VQ35DE) or
EM-187, "
Components" (for VK45DE).

After completing installation, check A/T fluid leakage, A/T fluid level, and the positions of A/T. Refer to AT-
13, "Checking A/T Fluid" , AT- 2 3 1 , "Checking of A/T Position" .
SCIA2010E

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-4Revision: 2006 July 2007 FX35/FX45
Removal and Installation of Expansion Valve ......
.155
REMOVAL ........................................................ .155
INSTALLATION ................................................. .155
Checking for Refrigerant Leaks ........................... .156
Checking System for Leaks Using the Fluorescent
Leak Detector ...................................................... .156
Dye Injection ........................................................ .156
Electrical Leak Detector ....................................... .157
PRECAUTIONS FOR HANDLING LEAK DETECTOR ......................................................
.157
CHECKING PROCEDURE ............................... .158
SERVICE DATA AND SPECIFICATIONS (SDS) ... .160
Compressor ......................................................... .160
Lubricant .............................................................. .160
Refrigerant ........................................................... .160
Engine Idling Speed ............................................. .160
Belt Tension ......................................................... .160

PRECAUTIONS ATC-13
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Revision: 2006 July 2007 FX35/FX45

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 CompressorNJS000DB

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

When the compressor is removed, store it in the same way at 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 EquipmentNJS000DC
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.
ELECTRICAL LEAK DETECTOR
Be certain to follow the manufacturer’s instructions for tester operation and tester maintenance.
RHA861F

LUBRICANT ATC-27
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Revision: 2006 July 2007 FX35/FX45
LUBRICANTPFP:KLG00
Maintenance of Lubricant Quantity in CompressorNJS000DL
The lubricant in the compressor circulates through the system with the refrigerant. Add lubricant to compres-
sor when replacing any component or after a large refrigerant leakage 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
LUBRICANT RETURN OPERATION
Adjust the lubricant quantity according to the test group shown below.
1. CHECK LUBRICANT RETURN OPERATION
Can lubricant return operation be performed?

A/C system works properly.

There is no evidence of a large amount of lubricant leakage.
CAUTION:
If excessive lubricant leakage is noted, never perform the lubricant return operation.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. PERFORM LUBRICANT RETURN OPERATION, PROCEEDING AS FOLLOWS
1. Start the engine, and set to the following conditions:
–Engine speed: Idling to 1,200 rpm
–A/C switch: ON
–Blower speed: Max. position
–Temp. control: Optional [Set so that intake air temperature is 25 to 30 °C (77 to 86 °F).]
–Intake position: Recirculation (REC)
2. Perform lubricant return operation for about 10 minutes.
3. Stop the engine.
>> GO TO 3.
3. CHECK REPLACEMENT PART
Should the compressor be replaced?
YES >> GO TO AT C - 2 9 , "LUBRICANT ADJUSTING PROCEDURE FOR COMPRESSOR REPLACE-
MENT" .
NO >> GO TO AT C - 2 8 , "
LUBRICANT ADJUSTING PROCEDURE FOR COMPONENTS REPLACE-
MENT EXCEPT COMPRESSOR" .
Name : NISSAN A/C System Oil Type S

TROUBLE DIAGNOSIS ATC-53
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Revision: 2006 July 2007 FX35/FX45
FUNCTION CONFIRMATION PROCEDURE
1. SET IN SELF-DIAGNOSIS MODE
1. Turn ignition switch ON.
2. Set in self-diagnosis mode as follows. Within 10 seconds after starting engine (ignition switch is turned ON.), press OFF switch for at least 5 seconds.
NOTE:

If battery voltage drops below 12 V during diagnosis STEP-3, door motor speed becomes slower and as a
result, the system may generate an error even when operation is normal. To avoid this, start engine before
performing this diagnosis.

Former STEP-1 (LEDs and display screen are checked) does not exist in this self-diagnosis function.
>> GO TO 2.
2. STEP-2: SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT
Does code No. 20 appear on the display?
YES >> GO TO 3.
NO >> GO TO 13.
3. CHECK TO ADVANCE SELF-DIAGNOSIS STEP-3
Press temperature control (UP) switch (driver side).
Advance to self
-diagnosis STEP-3?
YES >> GO TO 4.
NO >> Replace A/C and AV switch. (Temperature control switch is malfunctioning.)
4. CHECK TO RETURN SELF-DIAGNOSIS STEP-2
Press temperature control (DOWN) switch (driver side).
Return to self
-diagnosis STEP-2?
YES >> GO TO 5.
NO >> Malfunctioning A/C and AV switch or unified meter and A/C amp. Refer to ATC-101, "
Self-diagno-
sis" .
5. STEP-3: MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED
Press temperature control (UP) switch (driver side).
Does code No. 30 appear on the display?
YES >> GO TO 6.
NO >> GO TO 14.
SJIA1778E
SJIA1779E