check engine INFINITI QX4 2001 Factory Service Manual

Self-diagnosis ModeNBEL0231APPLICATION ITEMSNBEL0231S01
Mode DescriptionReference
page
Self DiagnosisSelf-diagnosis for display & NAVI control unit, CD-ROM
and GPS antenna connection.EL-398
Confirmation/
adjustmentDisplay Diagnosis Color and gray gradation of display can be checked in
this mode.EL-406
Diagnostic Signals from the Car Several input signals to display & NAVI control unit, can
be monitored in this mode.EL-404
NavigationCheck the map CD-
ROM versionThe version (parts number) of inserted CD-ROM can be
checked in this mode.EL-405
Error history Diagnosis results previously stored in the memory
(before turning ignition switch ON) are displayed in this
mode. Time and location when/where the errors
occurred are also displayed.EL-400
Longitude & Latitude Display the map. Use the joystick to adjust position. Lon-
gitude and latitude will be displayed.EL-407
Adjust the angle Turning angle of the vehicle on the display can be
adjusted in this mode.EL-408
Speed CalibrationUnder ordinary conditions, the navigation system dis-
tance measuring function will automatically compensate
for minute decreases in wheel and tire diameter caused
by tire wear or low pressure. Speed calibration immedi-
ately restores system accuracy in cases such as when
distance calibration is needed because of the use of tire
chains in inclement weather.EL-409
Initialize Location This mode is for initializing the current location. Use
when the vehicle is transported a long distance on a
trailer, etc.EL-433
SEL583X
HOW TO PERFORM SELF-DIAGNOSIS MODENBEL0231S021. Start the engine.
2. Push both of ªMAPº and ªD/Nº switches at the same time for
more than 5 seconds.
SEL584X
3. Touch ªSelf Diagnosisº or ªConfirmation/ adjustmentº.
IFor further procedure, refer to the following pages which
describe each application item of the self-diagnosis mode.
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NAVIGATION SYSTEM
Self-diagnosis Mode
EL-397

ªDIAGNOSTIC SIGNALS FROM THE CARº MODE=NBEL0232S03DescriptionNBEL0232S0301In ªDiagnostic Signals From the Carº mode, following input signals
to the display & NAVI control unit can be checked on the display.
Item Indication Vehicle condition
Vehicle
Speed*ON Vehicle speed is greater than 0 km/h (0 MPH).
OFF Vehicle speed is 0 km/h (0 MPH).
LightON Lighting switch is in 1st or 2nd position.
OFF Lighting switch is in ªOFFº position.
IGNON Ignition switch is in ªONº position.
OFF Ignition switch is in ªACCº position.
REVERSE*ON Selector/shift lever is in ªReverseº position.
OFFSelector/shift lever is in other than ªReverseº posi-
tion.
*: When ignition switch is in ªACCº position, indication will be changed to ª-º.
SEL584X
How to PerformNBEL0232S03021. Start the engine.
2. Push both ªMAPº and ªD/Nº switches at the same time for more
than 5 seconds.
3. Touch ªConfirmation/ adjustmentº.
SEL588X
4. Touch ªDiagnostic Signals from the Carº.
SEL591X
5. Then ªDiagnostic Signals from the Carº mode is performed.
NAVIGATION SYSTEM
Confirmation/Adjustment Mode (Cont'd)
EL-404

SEL584X
ªCHECK THE MAP CD-ROM VERSIONº MODE=NBEL0232S04How to PerformNBEL0232S04011. Start the engine.
2. Push both ªMAPº and ªD/Nº switches at the same time for more
than 5 seconds.
3. Touch ªConfirmation/ adjustmentº.
SEL588X
4. Touch ªNavigationº.
SEL589X
5. Touch ªCheck the map CD-ROM versionº.
SEL592X
6. The version (parts number) of CD-ROM loaded to the display
and NAVI control unit will be displayed.
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NAVIGATION SYSTEM
Confirmation/Adjustment Mode (Cont'd)
EL-405

ªDISPLAY DIAGNOSISº MODE=NBEL0232S05DescriptionNBEL0232S0501Use the ªDiagnosis Displayº mode to check the display color bright-
ness and shading. The display & NAVI control unit must be
replaced if the color brightness and shading are abnormal.
SEL584X
How to PerformNBEL0232S05021. Start the engine.
2. Push both ªMAPº and ªD/Nº switches at the same time for more
than 5 seconds.
3. Touch ªConfirmation/ adjustmentº.
SEL588X
4. Touch ªDisplay Diagnosisº.
SEL593X
5. Touch ªDisplay color spectrum barº or ªDisplay gradation barº.
6. Then color bar/gray scale will be displayed.
SEL594X
NAVIGATION SYSTEM
Confirmation/Adjustment Mode (Cont'd)
EL-406

ªADJUST THE ANGLEº MODE=NBEL0232S07DescriptionNBEL0232S0701If the display indicates a larger or smaller turning angle than the
actual turning angle, the gyro (angular speed sensor) sensing val-
ues must be checked.
In case that the vehicle on the display makes larger angle turn than
reality, touch ªþº. In case that the vehicle on the display makes
smaller angle turn than reality, touch ª+º.
SEL584X
How to PerformNBEL0232S07021. Start the engine.
2. Push both ªMAPº and ªD/Nº switches at the same time for more
than 5 seconds.
3. Touch ªConfirmation/ adjustmentº.
SEL588X
4. Touch ªNavigationº.
SEL589X
5. Touch ªAdjust the angleº.
SEL596X
6. Touch ªLeft Turnº to adjust the angle to the left. Touch ªRight
Turnº to adjust the angle to the right.
7. Touch ª+º to increase the angle change coefficient or ªþº to
reduce the angle change coefficient.
8. Touch ªSetº to save the changed values in memory.
9. Then the vehicle turning angle on the display has adjusted.
NAVIGATION SYSTEM
Confirmation/Adjustment Mode (Cont'd)
EL-408

Possible cause Drive condition Service procedure
Opera-
tionDriving immediately after starting engine.The gyro (angular velocity sensor)
needs about 15 seconds after the
engine is started to precisely sense
the angular velocity. Directional
sensing errors will occur if the
vehicle is moved immediately after
starting the engine. The position
marker may indicate inaccurate
position.Wait a few moments between
starting the engine and actually
driving the vehicle.
Continuous driving for long distances (non-stop)When the vehicle is driven continu-
ously without stopping over a long
distance, errors in directional sens-
ing may occur. The position marker
may indicate inaccurate position.Stop the vehicle. Perform
ªSPEED CALIBRATIONº (EL-
409).
Rough or violent drivingWheel spinning (peeling out) or simi-
lar rough driving techniques can
adversely affect sensing accuracy.
The position marker may indicate
inaccurate position.If the position marker does not
move to the correct position
even after the vehicle has been
driven approximately 10 km (6
miles), perform ªADJUST CUR-
RENT LOCATIONº (EL-411).
Posi-
tional
calibra-
tion pro-
ceduresPositional calibration precision
SEL701V
If current vehicle location is roughly
set, the system may be unable to
locate the road that the vehicle is
traveling on. (This is especially true
in an area where there are many
roads.)Perform ªADJUST CURRENT
LOCATIONº (EL-411) within a
precision standard of 1 mm
(0.04 in) on the display.
Note: During calibration, use
the most detailed map pos-
sible.
Position calibration direction
SEL702V
When calibrating the position, check
the vehicle direction. If the vehicle
direction is not correct, subsequent
precision of current location will be
affected.Perform ªADJUST CURRENT
LOCATIONº, refer to EL-411.
NAVIGATION SYSTEM
This Condition is Not Abnormal (Cont'd)
EL-426

ENGINE MECHANICAL
SECTION
EM
CONTENTS
PRECAUTIONS...............................................................3
Parts Requiring Angular Tightening .............................3
Liquid Gasket Application Procedure ..........................3
PREPARATION...............................................................4
Special Service Tools ..................................................4
Commercial Service Tools ...........................................6
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING.....................................................8
NVH Troubleshooting - Engine Noise .........................9
OUTER COMPONENT PARTS.....................................10
Removal and Installation ...........................................10
TIGHTENING PROCEDURES...................................12
MEASUREMENT OF COMPRESSION PRESSURE....14
OIL PAN.........................................................................15
Components...............................................................15
Removal .....................................................................15
Installation ..................................................................18
TIMING CHAIN..............................................................20
Components...............................................................20
POSITION FOR APPLYING LIQUID GASKET............21
Removal .....................................................................23
Inspection...................................................................29
Installation ..................................................................29
OIL SEAL.......................................................................35
Replacement ..............................................................35
VALVE OIL SEAL.....................................................35
OIL SEAL INSTALLATION DIRECTION.....................36
FRONT OIL SEAL....................................................36
REAR OIL SEAL......................................................36
CYLINDER HEAD..........................................................38
Components...............................................................38
Removal .....................................................................39
Disassembly...............................................................41
Inspection...................................................................42
CYLINDER HEAD DISTORTION...............................42
CAMSHAFT VISUAL CHECK....................................42
CAMSHAFT RUNOUT..............................................42
CAMSHAFT CAM HEIGHT.......................................42
CAMSHAFT JOURNAL CLEARANCE........................42
CAMSHAFT END PLAY............................................43
CAMSHAFT SPROCKET RUNOUT...........................43
VALVE GUIDE CLEARANCE....................................43
VALVE GUIDE REPLACEMENT................................44
VALVE SEATS.........................................................45
REPLACING VALVE SEAT FOR SERVICE PARTS....45
VALVE DIMENSIONS...............................................46
VALVE SPRING.......................................................46
VALVE LIFTER........................................................46
Assembly ...................................................................47
Installation ..................................................................47
Valve Clearance.........................................................52
CHECKING.............................................................52
ADJUSTING............................................................54
ENGINE ASSEMBLY.....................................................57
Removal and Installation ...........................................57
REMOVAL...............................................................58
INSTALLATION........................................................60
CYLINDER BLOCK.......................................................61
Components...............................................................61
CYLINDER BLOCK HEATER....................................62
Removal and Installation ...........................................62
Disassembly...............................................................62
PISTON, CRANKSHAFT AND OIL JET......................62
Inspection...................................................................63
PISTON AND PISTON PIN CLEARANCE..................63
PISTON RING SIDE CLEARANCE............................64
PISTON RING END GAP..........................................64
CONNECTING ROD BEND AND TORSION...............65
CYLINDER BLOCK DISTORTION AND WEAR...........65
PISTON-TO-BORE CLEARANCE..............................66
CRANKSHAFT.........................................................67
BEARING CLEARANCE...........................................67
CONNECTING ROD BUSHING CLEARANCE
(SMALL END)
..........................................................70
DRIVE PLATE RUNOUT..........................................70
Assembly ...................................................................71
PISTON..................................................................71
OIL JET..................................................................71
CRANKSHAFT.........................................................71
REPLACEMENT OF PILOT CONVERTER.................74
DRIVE PLATE.........................................................74
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NVH Troubleshooting Ð Engine NoiseNBEM0005S01Use the chart below to help you find the cause of the symptom.
1. Locate the area where noise occurs.
2. Confirm the type of noise.
3. Specify the operating condition of engine.
4. Check specified noise source.
If necessary, repair or replace these parts.
Location of
noiseType of
noiseOperating condition of engine
Source of
noiseCheck itemReference
page Before
warm-upAfter
warm-upWhen
startingWhen
idlingWhen
racingWhile
driving
To p o f
engine
Rocker
cover
Cylinder
headTicking or
clickingC A ÐA BÐTappet
noiseValve clearance EM-54
Rattle C A Ð A B CCamshaft
bearing
noiseCamshaft journal clear-
ance
Camshaft runoutEM-42, 42
Crankshaft
pulley
Cylinder
block
(Side of
engine)
Oil panSlap or
knockÐ A ÐB BÐPiston pin
noisePiston and piston pin
clearance
Connecting rod bush-
ing clearanceEM-63, 70
Slap or
rapA ÐÐBBAPiston slap
noisePiston-to-bore clear-
ance
Piston ring side clear-
ance
Piston ring end gap
Connecting rod bend
and torsionEM-64, 64,
65, 66
Knock A B C B B BConnect-
ing rod
bearing
noiseConnecting rod bush-
ing clearance (Small
end)
Connecting rod bearing
clearance (Big end)EM-70, 69
Knock A B Ð A B CMain bear-
ing noiseMain bearing oil clear-
ance
Crankshaft runoutEM-67, 67
Front of
engine
Timing
chain
coverTapping or
tickingA A ÐBBBTiming
chain and
chain ten-
sioner
noiseTiming chain cracks
and wear
Timing chain tensioner
operationEM-29, 20
Front of
engineSqueaking
or fizzingA B ÐBÐCOther
drive belts
(Sticking
or slipping)Drive belts deflectionMA section
(ªChecking
Drive
Beltsº,
ªENGINE
MAINTE-
NANCEº) Creaking A BABABOther
drive belts
(Slipping)Idler pulley bearing
operation
Squall
CreakA B ÐBABWater
pump
noiseWater pump operationLC section
(ªWater
Pump
Inspectionº,
ªENGINE
COOLING
SYSTEMº)
A: Closely related B: Related C: Sometimes related Ð: Not related
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NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting Ð Engine Noise
EM-9

NBEM0007
SEM480G
SEM481G
JEM482G
SEM387C
1. Warm up engine.
2. Turn ignition switch OFF.
3. Release fuel pressure.
Refer to EC-39, ªFuel Pressure Releaseº.
4. Remove engine cover and throttle wire.
5. Remove air duct with air cleaner case.
6. Remove harness connectors and harness brackets around
ignition coils.
7. Remove throttle body.
8. Disconnect ignition coil with power transistor harness
connectors, then remove ignition coils.
9. Remove all spark plugs.
IClean area around plug with compressed air before removing
the spark plug.
10. Attach a compression tester to No. 1 cylinder.
11. Depress accelerator pedal fully to keep throttle valve wide
open.
12. Crank engine and record highest gauge indication.
13. Repeat the measurement on each cylinder as shown above.
IAlways use a fully-charged battery to obtain specified
engine speed.
Unit: kPa (kg/cm2, psi)/rpm
Standard MinimumDifference limit between
cylinders
1,275 (13.0, 185)/300 981 (10.0, 142)/300 98 (1.0, 14)/300
14. If compression in one or more cylinders is low:
a. Pour a small amount of engine oil into cylinders through spark
plug holes.
b. Retest compression.
IIf adding oil helps compression, piston rings may be worn
or damaged. If so, replace piston rings after checking pis-
ton.
IIf pressure stays low, a valve may be sticking or seating
improperly. Inspect and repair valve and valve seat. (Refer
to SDS, EM-76 and EM-79.) If valve or valve seat is dam-
aged excessively, replace them.
IIf compression stays low in two cylinders that are next to
each other:
a) The cylinder head gasket may be leaking, or
b) Both cylinders may have valve component damage. Inspect
and repair as necessary.
15. Install parts in reverse order of removal.
16. Perform ªSelf-diagnosis Procedureº referring to EC-72, ªHow to
Erase DTCº if any DTC appears.
MEASUREMENT OF COMPRESSION PRESSURE
EM-14

SEM928E
InspectionNBEM0013Check for cracks and excessive wear at roller links. Replace
chain if necessary.
SEM930E
InstallationNBEM00141. Position crankshaft so that No. 1 piston is set at TDC on com-
pression stroke.
SEM929E
2. Install crankshaft sprocket on crankshaft.
IMake sure that mating marks on crankshaft sprocket face
front of engine.
SEM931E
3. Install lower chain guide on dowel pin, with front mark on the
guide facing upside.
SEM430G
4. Press and shrink the secondary chain tensioner sleeve, and fix
it using stopper pins.
ILubricate threads and seat surfaces of camshaft sprocket bolts
with new engine oil.
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TIMING CHAIN
Inspection
EM-29