2008 INFINITI FX35 air suspension

ABCDEFGHIJKLQUICK 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-
mentsLMAINTENANCEMAMaintenanceEdition: April 2007
Revision: April 2007

BR-4
< SERVICE INFORMATION >
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000001327606
Use the chart below to help you find the cause of the sy mptom. If necessary, repair or replace these parts.
×: ApplicableReference page
BR-18
,
BR-24
BR-18
, BR-24
BR-18
, BR-24—
—
BR-20, BR-26—
—
—
BR-20, BR-26—
NVH in PR section
NVH in FFD an d RFD section
NVH in FAX, RAX and FSU, RSU section
NVH in WT section
NVH in WT section
NVH in FAX and RAX section
NVH in PS section
Possible cause and
SUSPECTED PARTS
Pads - damaged
Pads - uneven wear
Shims damaged
Rotor imbalance
Rotor damage
Rotor runout
Rotor deformation
Rotor deflection
Rotor rust
Rotor thickness variation
Drum out of round
PROPELLER SHAFT
DIFFERENTIAL
AXLE AND SUSPENSION
TIRE
ROAD WHEEL
DRIVE SHAFT
STEERING
Symptom BRAKE Noise
××× ×× ×××
××
Shake ×××××
××
Shimmy, Judder ××××××× ××× ×
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TROUBLE DIAGNOSISBRC-31
< SERVICE INFORMATION > [VDC/TCS/ABS]
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 When active test is performed while depressing, t he pedal depression amount will change. This is normal.
 “TEST IS STOPPED” is displayed 10 seconds after operation start.
 After “TEST IS STOPPED” is displayed, touch “BACK” and perform test again.
TEST ITEM
Solenoid Valve
NOTE:
The example shown is for the front right wheel. The procedure for the other wheels is the same as given
below.
 When performing an active test of the ABS function, se lect the main item for each test item. In addition,
when performing an active test of the VDC/TCS function, select the item menu for each test item.
 For the ABS solenoid valve, touch “UP” “KEEP” “DOWN”, and for the ABS solenoid valve (ACT), touch “UP”
“ACTUATOR UP” “ACTUATOR KEEP”, and check to make su re that all solenoid valve (in, out) are operating
as given in the table below.
*: ON for 1 to 2 seconds after the touch, and then OFF
ABS Motor
Touch “ON” and “OFF” on the screen. Make sure AB S motor relay operates as shown in table below.
For Fast and Accurate DiagnosisINFOID:0000000001327675
PRECAUTIONS FOR DIAGNOSIS
 Before performing diagnosis, always read precautions. Refer to BRC-13, "How to Proceed with Diagnosis".
 If ABS actuator and electric unit (control unit), steer ing angle sensor, steering system parts or suspension
system parts have been replaced, or if alignment has been adjusted, be sure to adjust neutral position of
steering angle sensor before driving. Refer to BRC-8, "
Adjustment of Steering Angle Sensor Neutral Posi-
tion".
 After diagnosis is finished, be sure to erase memory. Refer to BRC-26, "
Self-Diagnosis".
 When checking continuity and voltage between units, be sure to check for disconnection, looseness, bend,
or collapse of connector terminals. If any malfuncti on is found, repair or replace connector terminals.
 For intermittent symptoms, possible cause is malfunc tion in harness, harness connector, or terminals. Move
harness, harness connector, and terminals to check for poor connections.
 If a circuit tester is used for the check, be ca reful not to forcibly extend any connector terminal.
 To use CONSULT-III to perform self-diagnosis of ABS act uator and electric unit (control unit), active tests, or
work support, first stop work, then connect CONSULT-III and select “ABS”.
 While self-diagnostic results of CONSULT-III shows malf unction, if CONSULT-III active test is performed, an
engine system error may be indicated. In this case, start engine to resume the normal screen.
 VDC/TCS/ABS system electronica lly controls brake operation and engine output. The following symptoms
may be caused by normal operations:
Operation ABS solenoid valve ABS so
lenoid valve (ACT)
UP KEEP DOWN UP ACTUATOR
UP ACTUATOR
KEEP
FR RH IN SOL OFF ON ON OFF OFF OFF
FR RH OUT SOL OFF OFF ON* OFF OFF OFF
CV 1 OFF OFF OFF OFF ON ON
SV 1 OFF OFF OFF OFF ON* OFF
Operation ON OFF
MOTOR RELAY ON OFF
ACTUATOR RLY ON ON
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OIL PAN AND OIL STRAINEREM-31
< SERVICE INFORMATION > [VQ35DE]
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 Do not spill engine oil on drive belts.
6. Drain engine coolant. Refer to CO-10, "
Changing Engine Coolant".
CAUTION:
 Perform this step when the engine is cold.
 Do not spill engine coolant on drive belts.
7. Remove engine cover with power tool. Refer to EM-19, "
Component".
8. Remove air hose from air duct to mass air flow sens or side and electric throttle control actuator side.
Refer to EM-17, "
Component".
9. Removal engine rear lower slinger, and install engine rear slinger [SST: 10006 31U00 ( — )] to sling engine assembly for positioning. Refer to EM-7, "
Special Service Tool".
10. Remove front suspension member. Refer to FSU-16, "
Removal and Installation".
11. Remove drive belts. Refer to EM-15, "
Removal and Installation".
12. Remove alternator stay. Refer to SC-19, "
System Description".
13. Remove starter motor. Refer to SC-8, "
System Description".
14. Remove idler pulley and bracket assembly. Refer to EM-64, "
Component".
15. Disconnect oil cooler water hoses, and remove oil cooler water pipe mounting bolt. Refer to LU-12, "
Com-
ponent".
16. Disconnect A/T fluid cooler hoses, and remove A/T fluid cooler tube. Refer to AT-241, "
Removal and
Installation (2WD Models)".
17. Remove crankshaft position sensor (POS). CAUTION:
 Handle carefully to avoid dropping and shocks.
 Do not disassemble.
 Do not allow metal powder to adhere to magnetic part at sensor tip.
 Do not place sensors in a location wh ere they are exposed to magnetism.
18. Remove oil filter, as necessary. Refer to LU-8, "
Removal and Installation".
19. Remove oil cooler, as necessary. Refer to LU-12, "
Component".
20. Remove oil pan (lower) as follows:
a. Loosen mounting bolts in reverse order as shown in the figure to remove.
b. Insert the seal cutter (SST) between oil pan (upper) and oil pan (lower).
CAUTION:
 Be careful not to damage the mating surfaces.
 Do not insert a screwdriver, this will damage the mating
surfaces.
c. Slide the seal cutter by tapping on the side of tool with a ham- mer. Remove oil pan (lower).Slinger bolts:
: 28.0 N·m (2.9 kg-m, 21 ft-lb)
PBIC0782E
SEM960F
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EM-36
< SERVICE INFORMATION >[VQ35DE]
OIL PAN AND OIL STRAINER
Removal and Installation (AWD Models)
INFOID:0000000001325719
REMOVAL
CAUTION:
To avoid the danger of being scalded, never drain engine oil when the engine is hot.
NOTE:
To remove oil pan (lower) only, take step 5, then st ep 24. Removal of step 1, hood assembly (step 2) and step
4 are unnecessary.
1. Remove front tire.
2. Remove hood assembly. Refer to BL-13, "
Fitting Adjustment".
3. Remove front and rear engine undercover with power tool.
4. Remove front cross bar with power tool. Refer to FSU-5, "
On-Vehicle Inspection and Service".
5. Drain engine oil. Refer to LU-7, "
Changing Engine Oil".
CAUTION:
 Perform this step when the engine is cold.
 Do not spill engine oil on drive belts.
6. Drain engine coolant. Refer to CO-10, "
Changing Engine Coolant".
CAUTION:
 Perform this step when the engine is cold.
 Do not spill engine coolant on drive belts.
7. Remove engine cover with power tool. Refer to EM-19, "
Component".
8. Remove air hose from air duct to mass air flow s ensor side and electric throttle control actuator side.
Refer to EM-17, "
Component".
9. Remove drive belts. Refer to EM-15, "
Removal and Installation".
10. Remove front drive shaft (LH and RH) and side shaft. Refer to FAX-13, "
On-Vehicle Inspection".
11. Remove side shaft. Refer to FFD-14, "
Removal and Installation (VQ35DE Models)".
12. Removal engine rear lower slinger, and install engine rear slinger [SST: 10006 31U00 ( — )] to sling engine assembly for positioning. Refer to EM-7, "
Special Service Tool".
13. Remove front suspension member. Refer to FSU-16, "
Removal and Installation".
14. Remove engine mounting bracket, engine mounting bracket (lower) and insulator. Refer to EM-112,
"Component (2WD Models)".
15. Remove front propeller shaft. Refer to PR-4, "
On-Vehicle Inspection".
16. Remove oil filter and oil filter bracket. Refer to LU-10, "
Component".
17. Remove alternator stay. Refer to SC-19, "
System Description".
18. Remove idler pulley and bracket. Refer to EM-15, "
Removal and Installation".
19. Disconnect oil cooler water hoses, and remove oil cooler water pipe mounting bolt. Refer to LU-12, "
Com-
ponent".
20. Disconnect A/T fluid cooler hoses, and remove A/T fluid cooler tube. Refer to AT-241, "
Removal and
Installation (2WD Models)".
21. Remove front final drive assembly. Refer to FFD-14, "
Removal and Installation (VQ35DE Models)".
22. Remove starter motor. Refer to SC-8, "
System Description".
1. Oil pan gasket (rear) 2. Oil pan (upper) 3. O-ring
4. Oil pan gasket (front) 5. Oil filter 6. Connector bolt
7. Oil cooler 8. O-ring 9. Relief valve
10. Oil filter bracket 11. Oil filter bracket gasket 12. Oil strainer
13. Drain plug 14. Drain plug washer 15. Oil pan (lower)
16. Rear plate cover 17. Crankshaft position sensor (POS) 18 O-ring (small)
19. O-ring (large) 20. Axle pipe
Slinger bolts:
: 28.0 N·m (2.9 kg-m, 21 ft-lb)
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ENGINE ASSEMBLYEM-113
< SERVICE INFORMATION > [VQ35DE]
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At first, remove the engine and the transmission asse
mbly with front suspension member downward. Then
separate the engine from transmission.
Preparation
1. Release fuel pressure. Refer to EC-87, "Fuel Pressure Check".
2. Drain engine coolant from radiator. Refer to CO-10, "
Changing Engine Coolant".
CAUTION:
 Perform this step when engine is cold.
 Do not spill engine coolant on drive belts.
3. Disconnect both battery terminals. Refer to SC-4, "
How to Handle Battery".
4. Remove the following parts:  Engine cover: Refer to EM-19, "
Component".
 Front road wheel and tires
 Front and rear engine undercover
 Front cross bar: Refer to FSU-16, "
Removal and Installation".
 Cowl top cover (right): Refer to EI-23, "
Component Parts Location".
 Air duct and air cleaner case assembly: EM-17, "
Component".
5. Discharge refrigerant from A/C circuit. Refer to ATC-120, "
HFC-134a (R-134a) Service Procedure".
6. Remove radiator hoses (upper and lower). Refer to CO-13, "
Component".
Engine Room
1. Disconnect heater hose from vehicle-side, and fit a plug onto hose end to prevent engine coolant leak.
2. Disconnect grounding cable (between vehicle to left bank cylinder head).
3. Disconnect battery positive cable harness at v ehicle side and temporarily fasten it on engine.
4. Disconnect A/C piping from A/C compressor, and tem porarily fasten it on vehicle with a rope. Refer to
ATC-120, "
HFC-134a (R-134a) Service Procedure".
5. Disconnect engine room harness connectors shown in the fig- ure.
6. Disconnect two body ground cables.
7. Disconnect brake booster vacuum hose.
8. Disconnect fuel feed hose (with damper) and EVAP hose. Refer to EM-45, "
Component".
CAUTION:
Fit plugs onto disconnected hoses to prevent fuel leak.
9. Remove reservoir tank of power steering oil pump and piping from vehicle, and temporarily secure them
on engine. Refer to PS-27, "
On-Vehicle Inspection and Service".
CAUTION:
When temporarily securing, keep the reservo ir tank upright to avoid a fluid leak.
Passenger Room Side
Follow procedure below to disconnect engine room harne ss connectors at passenger room side, and tempo-
rarily secure them on engine.
1. Remove passenger-side kicking plate, dash side finisher, and glove box. Refer to EI-38, "
Component
Parts Location" and IP-10, "Component Parts Location".
SBIA0472E
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EM-118
< SERVICE INFORMATION >[VQ35DE]
ENGINE ASSEMBLY
At first, remove the engine, the transmission assembly
, the transfer assembly and the front final drive assem-
bly with front suspension member downward. Then separa te the engine, the transmission assembly, the trans-
fer and the front final drive assembly.
Preparation
1. Release fuel pressure. Refer to EC-87, "Fuel Pressure Check".
2. Drain engine coolant from radiator. Refer to CO-10, "
Changing Engine Coolant".
CAUTION:
 Perform this step when engine is cold.
 Do not spill engine coolant on drive belts.
3. Disconnect both battery terminals. Refer to SC-4, "
How to Handle Battery".
4. Remove the following parts:  Engine cover: Refer to EM-19, "
Component".
 Front road wheel and tires
 Front and rear engine undercover
 Front cross bar: Refer to FSU-16, "
Removal and Installation".
 Cowl top cover (right): Refer to EI-23, "
Component Parts Location".
 Air duct and air cleaner case assembly: EM-17, "
Component".
5. Discharge refrigerant from A/C circuit. Refer to ATC-120, "
HFC-134a (R-134a) Service Procedure".
6. Remove radiator hoses (upper and lower). Refer to CO-13, "
Component".
Engine Room
1. Disconnect heater hose from vehicle-side, and fit a plug onto hose end to prevent engine coolant leak.
2. Disconnect grounding cable (between vehicle to left bank cylinder head).
3. Disconnect battery positive cable harness at v ehicle side and temporarily fasten it on engine.
4. Disconnect A/C piping from A/C compressor, and tem porarily fasten it on vehicle with a rope. Refer to
ATC-120, "
HFC-134a (R-134a) Service Procedure".
5. Disconnect engine room harness connectors shown in the fig- ure.
6. Disconnect two body ground cables.
7. Disconnect brake booster vacuum hose.
8. Disconnect fuel feed hose (with damper) and EVAP hose. Refer to EM-45, "
Component"
CAUTION:
Fit plugs onto disconnected hoses to prevent fuel leak.
9. Remove reservoir tank of power steering oil pump and piping from vehicle, and temporarily secure them
on engine. Refer to PS-27, "
On-Vehicle Inspection and Service".
CAUTION:
When temporarily securing, keep the reservo ir tank upright to avoid a fluid leak.
Passenger Room Side
Follow procedure below to disconnect engine room har ness connectors at passenger room side, and tempo-
rarily secure them on engine.
1. Remove passenger-side kicking plate, das h side finisher, and glove box. Refer to EI-38, "
Component
Parts Location" and IP-10, "Component Parts Location".
SBIA0472E
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FAX-10
< SERVICE INFORMATION >[AWD]
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000001327512
Use chart below to help you find the cause of the symp tom. If necessary, repair or replace these parts.
×: ApplicableReference page
—
FA X - 1 8—
FAX-11—
FAX-11
NVH in FFD section
NVH in FAX and FSU section
Refer to FRONT AXLE in this chart. NVH in WT section
NVH in WT section
Refer to DRIVE SHAFT in this chart. NVH in BR sectionNVH in PS section
Possible cause and SUSPECTED PARTS
Excessive joint angle
Joint sliding resistance
Imbalance
Improper installation, looseness
Parts interference
Wheel bearing damage
FRONT DIFFERENTIAL
FRONT AXLE AND FRONT SUSPENSION
FRONT AXLE
TIRE
ROAD WHEEL
DRIVE SHAFT
BRAKE
STEERING
Symptom DRIVE
SHAFT
Noise
×× ×××××× ××
Shake ×× ×××××××
FRONT
AXLE Noise
×××× ××××××
Shake ××× ××××××
Vibration ××× ××××
Shimmy ×× ××× ××
Judder × ××× ××
Poor quality ride or handling ×× ×××
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