2003 NISSAN X-TRAIL low oil pressure

EXHAUST MANIFOLD AND TURBOCHARGER
EM-123
[YD22DDTi]
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TURBINE WHEEL
lCheck that there is no oil adhesion.
lCheck that there is no carbon accumulation.
lCheck that blades of the turbine wheel are not bent or broken.
lCheck that the turbine wheel does not interfere with the turbine
housing.
COMPRESSOR WHEEL
lCheck that there is no oil adhesion inside the air inlet.
lCheck that the compressor wheel does not interfere with the
compressor housing.
lCheck that the wheel is not bent or broken.
WASTEGATE VALVE ACTUATOR
lConnect the handy pump to the actuator, and check that the rod
strokes smoothly in compliance with the following pressure.
lPressure to be applied at actuator part to move rod end as fol-
lows:
TROUBLE DIAGNOSIS OF TURBOCHARGER
Preliminary check:
lCheck that the engine oil level is between MIN and MAX of the dipstick. (When the engine oil amount is
more than MAX, the oil flows into the inlet duct through the blow-by gas passage, and the turbocharger is
misjudged failure.)
lAsk the customer if he/she always runs the vehicle in idle engine speed to cool the oil down after driving.
lReplace the turbocharger assembly when any malfunction is found after unit inspections specified in the
table below.
lIf no malfunction is found after the unit inspections, judge that the turbocharger body has no failure. Check
the other parts again.
SEM272G
SEM273G
Standard (Pressure/rod stroke amount):
: 150.80 - 156.20 kPa (1,508 - 1,562 mbar, 1,131 - 1,172
mmHg, 44.0 - 46.2 inHg)/0.38 mm (0.0150 in)
: 176.50 - 185.90 kPa (1,765 - 1,859 mbar, 1,324 - 1,394
mmHg, 52.2 - 54.9 inHg)/4.0 mm (0.157 in)
SEM274G
Inspection item Inspection resultSymptom
(when each inspection item meets each inspection result)
Oil leakage Smoke NoiseInsufficient power/
acceleration failure

CYLINDER HEAD
EM-173
[YD22DDTi]
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CYLINDER HEADPFP:11041
On-Vehicle ServiceEBS00BPL
CHECKING COMPRESSION PRESSURE
1. Warm up engine thoroughly. Then, stop it.
2. Using CONSULT-II, make sure no error codes are indicated for self-diagnosis items. Refer toEC-672,
"Basic Inspection".
lDo not disconnect CONSULT-II until the end of this operation; it will be used to check engine rpm and
for error detection at the end of this operation.
3. Disconnect the negative battery terminal.
4. Remove the following parts.
lCharge air cooler (Refer toEM-114, "Removal and Installation".)
5. To prevent fuel from being injected during inspection, remove
fuel supply pump fuse [ENG CONT (20A)] from fuse box on the
left side of engine compartment.
lAmong marks on fuse box, [ENG CONT 3 (20A)] is for fuel
supply pump fuse.
6. Remove glow plugs from all the cylinders. Refer toEM-130,
"Removal and Installation".
CAUTION:
lBefore removal, clean the surrounding area to prevent
entry of any foreign materials into the engine.
lCarefully remove glow plugs to prevent any damage or
breakage.
lHandle with care to avoid applying any shock to glow plugs.
7. Install adapter to installation holes of glow plugs and connect
compression gauge for diesel engine.
8. Connect battery negative terminal.
9. Set the ignition switch to “START” and crank. When gauge
pointer stabilizes, read compression pressure and engine rpm.
Repeat the above steps for each cylinder.
lAlways use a fully-charged battery to obtain specified engine
speed.
Unit:kPa(bar,kg/cm2, psi)/rpm
lWhen engine rpm is out of the specified range, check the specific gravity of battery liquid. Measure
again under corrected conditions.
lIf engine rpm exceeds the limit, check valve clearance and combustion chamber components (valves,
valve seats, cylinder head gaskets, piston rings, pistons, cylinder bores, cylinder block upper and lower
surfaces) and measure again.
lIf compression pressure is low in some cylinders, apply engine oil from glow plug installation hole. Then
check pressure again.
–If compression pressure becomes normal after applying oil, piston ring may be worn or damaged.
Check piston ring for malfunction. If any, replace piston ring.
–If compression pressure is still low after applying oil, valve may be malfunctioning. Check valve for mal-
function. If contact malfunction is found, replace valve or valve seat.
lIf compression pressure in adjacent two cylinders is low after applying oil, pressure may be leaking
from gasket. In this case, replace cylinder head gasket.
SBIA0192E
:18-21N·m(1.8-2.2kg-m,13-15ft-lb)
Standard MinimumDifference limit between
cylinders
2,893 (28.9, 29.5, 419)/
2002,452 (24.52, 25.0, 356)/
200490 (4.90, 5.0, 71)/200
SEM112G

CYLINDER BLOCK
EM-189
[YD22DDTi]
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CAUTION:
Apply new engine oil to parts marked in illustration before installation.
DISASSEMBLY
1. Remove engine assembly from the vehicle, then separate engine and transaxle. Refer toEM-184,
"ENGINE ASSEMBLY".
2. Remove clutch cover and disk. Refer toCL-15, "
CLUTCH DISC,
CLUTCH COVER AND FLYWHEEL".
3. If they need to be replaced, replace pilot bushing.
lUsing pilot bushing puller, remove the bushing from rear edge
of crankshaft.
4. Install engine to engine stand as follows.
a. Remove flywheel.
b. Secure ring gear with ring gear stopper, then loosen mounting
bolts with TORX bit (size: Q6T55 E9, Commercial Service Tools)
and remove them. As an alternative method hold the crankshaft
pulley with a pulley holder (SST) to remove the flywheel.
CAUTION:
Do not disassemble flywheel.
c. Install engine sub-attachment to the rear side of cylinder block.
lAlign knock pins on cylinder block with pin holes on attach-
ment to install.
NOTE:
Installation bolts are part of engine sub-attachment.
d. Install engine attachment.
NOTE:
Use commercially available M12 (0.47 in) mounting bolts and
nuts (4 sets) with strength grade of 9T (minimum).
1. Rear oil seal retainer 2. Oil pressure switch 3. Coppet washer
4. Oil jet relief valve 5. Cylinder block 6. Top ring
7. Second ring 8. Oil ring 9. Oil jet
10. Piston pin 11. Snap ring 12. Piston
13. Main bearing 14. Thrust bearing 15. Connecting rod
16. Key 17. Connecting rod bearing 18. Connecting rod cap
19. Connecting rod nut 20. Main bearing 21. Crankshaft
22. Main bearing cap 23. Pilot bush 24. Flywheel
25. Drain plug 26. Rear oil seal
SEM500G
SBIA0199E
JEM192G

EM-220
[YD22DDTi]
SERVICE DATA AND SPECIFICATIONS (SDS)
M8 bolt 16.0- 19.0 (1.6 - 1.9, 12 - 14)
Injection tube Nozzle side 21.6 - 24.5 (2.2 - 2.5, 16 - 18)
Pump side 26.5 - 29.4 (2.7 - 3.0, 20 - 21)
Nozzle support25.1 - 28.0 (2.6 - 2.8, 19 - 20)
Spill tube Nozzle side 14.7 - 16.7 (1.5 - 1.7, 11 - 12)
Cylinder head side 16.7 - 20.6 (1.7 - 2.1, 13 - 15)
Common rail51.0 - 64.0 (5.2 - 6.5., 38 - 47)
Fuel supply pump46.0 - 56.0 (4.57 - 5.7, 37 - 41)
Fuel supply pump sprocket 37.0 - 41.0 (3.8 - 4.2, 28 - 30)
Fuel supply pump rear bracket 27.0 - 37.0 (2.8 - 3.8, 20 - 27)
Front chain case
6.9 - 8.8 ( 0.7 - 0.9, 61 - 78)*
2
Chain tensioner
8.5 - 10.7 (0.86 - 1.1, 75 - 95)*2
Tensior guide21.0 - 26.0 (2.1 - 2.7, 16 - 19)
Slack guide21.0 - 26.0 (2.1 - 2.7, 16 - 19)
Camshaft sprocket138- 147 (14.0 - 15.0, 102 - 108)
Fuel supply pump sprocket 38.0 -41.0 (3.8 - 4.2, 28 - 30)
Oil pump12 - 13 (1.3 - 1.4, 9 - 10)
Power steering pump51.0 - 56.0 (5.2 - 5.8, 38 - 41)
Rear chain case12.0 - 13.0 (1.2 - 1.4, 19 - 10)
Engine coolant temperature sensor 12.0- 15.0 (1.2 - 1.6, 9- 11)
*1 Cylinder head 1) 29 - 38 (2.9 - 3.9, 21 - 28)
2) 180°to185°
3) 0 (0, 0)
4) 35 to 44 (3.5 - 4.5, 26 - 32)
5) 90°to 95°(angle tightening)
6) 90°to 95°(angle tightening)
Water outlet21 - 28 (2.1 - 2.9, 16 - 20)
Glow plug18.0 - 2.0 (1.8 - 2.2, 13 - 15)
*1 Flywheel103 - 112 (10.5 - 115, 76 - 83)
Oil pressure switch13.0 - 17.0 (1.25 - 1.75, 9 - 12)
Oil jet6.1 - 10.7(0.62 - 1.1, 54 - 95)
Oil jet relief valve40 - 58 (4.0 - 6.0, 29 - 43)
Rear oil seal retainer12.0 - 13.0 (1.2 - 1.4, 9 - 10)

FL-8
[QR20DE]
FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY
2. Disconnect fuel pump harness connector.
3. Separate the fuel filter and fuel level sensor unit.
a. Fit a used O-ring into space between fuel level sensor unit and
fuel filter. Undo catches and separate fuel level sensor unit and
fuel filter.
lFor reference when reassembling, put a mating mark on outer
edges of fuel level sensor unit and fuel filter with some means
which cannot be erased by fuel.
b. Insert blade end screwdriver to the gap between the fuel filter
and fuel level sensor unit to separate them.
CAUTION:
Put cloth or similar one on the edge of screwdriver not to
damage the inserted portion.
4. Remove pressure regulator from fuel filter.
a. Open and remove the clip.
b. Pull the pressure regulator straight out during removal.
CAUTION:
lAvoid impacts such as falling during removal.
lDo not disassemble or adjust.
ASSEMBLY
Install in the reverse order of removal paying attention to the following.
lInstall the fuel filter and fuel pump with the tabs aligned, Make sure a click sound of secure engagement
is heard.
lSecurely connect the harness connector of the fuel pump.
lInstall the pressure regulator O-ring as follows.
CAUTION:
lWhen replacing, always use a new O-ring.
lHandle it with bare hands. (Do not use gloves.)
lVisually check the O-ring, mounting parts and mating parts for foreign materials and flaws.
lBefore installing, apply new engine oil.
lTo avid damage, do not apply an excessive force (pulling or starching).
lInstall the pressure regulator as follows.
1. Insert the clip to the groove of the regulator.
2. With the clip installed, insert the regulator straight by matching
the fuel filter protrusion and the clip notch.
3. Make sure that the fuel filter protrusion and clip notch are
securely engaged.
PBIC0243E
PBIC0244E
PBIC0245E

FSU-6
FRONT SUSPENSION ASSEMBLY
On-Vehicle Inspection and Service
EES00072
LOOSENESS, BACKLASH AND DAMAGE OF MOUNTING PARTS AND CONNECTIONS
Lift vehicle and inspect the following:
lCheck mounting point of each component for looseness, backlash and damage.
lCheck lower ball joint end play.
1. Attach a dial gauge so that the contact rests on the brake caliper.
2. Set front wheels in a straight-ahead position. Do not depress brake pedal.
3. Measure axial endplay by placing an iron pry bar or something similar between transverse link and steer-
ing knuckle.
CAUTION:
Be careful not to damage ball joint boot.
4. If axial endplay is outside the standard, remove transverse link and check lower ball joint.
Wheel AlignmentEES00073
DESCRIPTION
lMeasure wheel alignment under unladen conditions. “Unladen conditions” means that fuel, coolant, and
lubricant are full. However, spare tire, jack, and hand tools should be unloaded.
PRELIMINARY INSPECTION
1. Check the tires for improper air pressure and wear.
2. Check road wheels for runout.
3. Check wheel bearing axial endplay.
4. Check lower ball joint axial endplay.
5. Check strut operation.
6. Check each mounting point of axle and suspension for looseness and deformation.
7. Check each link and arm for cracks, deformation, and other damage.
8. Check the vehicle posture.
INSPECTION OF CAMBER, CASTER, AND KINGPIN INCLINATION ANGLES
lCamber, caster, and kingpin inclination angles cannot be adjusted.
lBefore inspection, mount front wheels onto turning radius gauge. Mount rear wheels onto a stand that has
same height so the vehicle will remain horizontal.
1. Measure camber, caster and kingpin inclination of both right and
left wheels with a suitable alignment gauge.
2. If camber, caster or kingpin inclination is not within specification,
inspect front suspension parts. Replace dam-aged or worn out
parts.
1 Upper mounting plate 2 Strut spacer 3 Strut mounting insulator
4 Spring upper seat 5 Thrust bearing 6 Spring upper seat
7 Upper rubber seat 8 Bound bumper 9 Coil spring
10 Strut 11 Axle assembly 12 Cotter pin
13 Clamp 14 Bushing 15 Stabilizer bar
16 Washer 17 Connecting rod 18 Suspension member
19 Member pin stay 20 Transverse link
Axial endplay : 0 mm (0 in)
Camber, caster and kingpin inclination:
FSU-13, "
SERVICE DATA AND SPECIFICATIONS
(SDS)"
SRA096A

GI-6
PRECAUTIONS
Precautions for Multiport Fuel Injection System or Engine Control System
EAS000FT
lBefore connecting or disconnecting any harness connector for
the multiport fuel injection system or ECM:
Turn ignition switch to “OFF” position.
Disconnect negative battery terminal.
Otherwise, there may be damage to ECM.
lBefore disconnecting pressurized fuel line from fuel pump to
injectors, be sure to release fuel pressure.
lBe careful not to jar components such as ECM and mass air
flow sensor.
Precautions for Turbocharger (If Equipped)EAS000FU
The turbocharger turbine revolves at extremely high speeds and
becomes very hot. Therefore, it is essential to maintain a clean sup-
ply of oil flowing through the turbocharger and to follow all required
maintenance instructions and operating procedures.
lAlways use the recommended oil. Follow the instructions for
proper time to change the oil and proper oil level.
lAvoid accelerating engine to a high rpm immediately after start-
ing.
lIf engine had been operating at high rpm for an extended period
of time, let it idle for a few minutes prior to shutting if off.
Precautions for HosesEAS000FV
HOSE REMOVAL AND INSTALLATION
lTo prevent damage to rubber hose, do not pry off rubber hose
with tapered tool or screwdriver.
lTo reinstall the rubber hose securely, make sure that hose inser-
tion length and orientation is correct. (If tube is equipped with
hose stopper, insert rubber hose into tube until it butts up
against hose stopper.)
SGI787
SGI292
SMA019D
SMA020D

IDX-2
ALPHABETICAL INDEX
Numerics
4WD mode switch ...................................TF-53
,TF-57
4WD shift indicator lamp .........................TF-32,TF-54
4WD solenoid valve ................................TF-49,TF-51
4WD warning lamp ..........TF-32,TF-40,TF-55,TF-58
A
A/C air flow .........................................ATC-28
,MTC-5
A/C component layout .....................................ATC-20
A/C compressor clutch removal and installation ...........
ATC-129
A/C compressor precaution ...............................ATC-7
A/C compressor special service tool ................ATC-11
A/C diagnostic work flow (auto A/C) ................ATC-30
A/C HFC134a (R134a) system precaution ........ATC-4
A/C HFC134a (R134a) system service procedure .......
ATC-123
A/C HFC134a (R134a) system service tools ...ATC-12
A/C HFC134a system service equipment precaution ...
ATC-8
A/C lubricant (R134a) ......................................ATC-21
A/C operational check .........................ATC-51,MTC-7
A/C performance test diagnoses .....................ATC-83
A/C reray ..........................................................ATC-80
A/C self-diagnoses (auto A/C) .........................ATC-42
A/C service data specification ........................ATC-143
A/C system description (auto A/C) ...................ATC-24
A/C trouble diagnoses (auto A/C) .......ATC-30,MTC-3
A/C, A - Wiring diagram ...................................ATC-35
A/CCUT - Wiring diagram ................................EC-824
A/T - Wiring diagram - AT - FTS ......................AT-138
A/T - Wiring diagram - AT - MAIN ....................AT-389
A/T - Wiring diagram - AT - PNP/SW ...............AT-132
A/T - Wiring diagram - AT - VSS A/T .AT-144,AT-394
A/T fluid checking ..................................AT-13,MA-36
A/T fluid replacement .............................AT-13,MA-36
A/T fluid temperature sensor ...........................AT-141
A/T IND - Wiring diagram ....................................DI-51
A/T indicator ........................................................DI-51
A/T shift lock system ........................................AT-446
A/T shift lock system - Wiring diagram ............AT-447
A/T trouble diagnoses ..........................AT-56,AT-279
A/T Wiring diagram - AT - ENG SS ...AT-148,AT-433
A/T Wiring diagram AT - 1ST ...........................AT-154
A/T Wiring diagram AT - 2ND ..........................AT-161
A/T Wiring diagram AT - 3RD ..........................AT-168
A/T Wiring diagram AT - 4TH ..........................AT-175
A/T Wiring diagram AT - BA/FTS .......AT-218,AT-428
A/T Wiring diagram AT - LPSV ..........AT-188,AT-438
A/T Wiring diagram AT - OVRCSV ....AT-210,AT-418
A/T Wiring diagram AT - SSV/A .........AT-195,AT-408
A/T Wiring diagram AT - SSV/B .........AT-200,AT-413
A/T Wiring diagram AT - TCV ............AT-183,AT-423
A/T Wiring diagram AT - TPS ............AT-205,AT-403
A/T Wiring diagrawm AT - VSSMTR ..AT-224,AT-399
ABS - Wiring diagram .....................................BRC-12
Absolute pressure sensor ................................EC-749
Accelerator control system ...............................ACC-2
Accelerator pedal position (APP) sensor ........EC-154,
EC-484
,EC-715
Accelerator pedal released position learning ...EC-664
Accelerator pedal released position switch ......EC-783
Actuator relay .....................................................TF-51
Aiming adjustment ...............................................LT-4
Air bag ..............................................................SRS-3
Air bag disposal ..............................................SRS-40
Air bleeding (hydraulic clutch) ..............................CL-8
Air bleeding for brake system ............................BR-10
Air cleaner and air duct(QR20DE) ....................EM-15
Air cleaner and air duct(YD22DDTi) ...............EM-112
Air cleaner filter replacement(QR20DE) ...........MA-23
Air cleaner filter replacement(YD22DDTi) .........MA-31
Air cleaner filter(QR20DE) ................................EM-15
Air cleaner filter(YD22DDTi) ...........................EM-112
Air conditioner cut control .....EC-27,EC-392,EC-662
Air flow meter - See Mass air flow sensor .......EC-130,
EC-260
,EC-463
Air mix door control linkage adjustment .........ATC-64,
ATC-119
,MTC-9,MTC-28
Air mix. door motor .........................ATC-61,ATC-119
Air spoiler, rear ...................................................EI-21
Alternator ...........................................................SC-12
Ambient sensor .................ATC-93,ATC-95,ATC-105
Angular tightening application(QR20DE) ............EM-5
Angular tightening application(YD22DDTi) .....EM-102
Antenna - See Power antenna ...........................AV-15
APPS - Wiring diagram .......EC-156,EC-486,EC-717
APRSW - Wiring diagram ................................EC-785
Audio ....................................................................AV-3
Auto air conditioner - Wiring diagram .............ATC-35
Automatic amplifier ...........................ATC-41,ATC-53
Automatic transmission fluid replacement .......MA-35,
MA-37
Axle ...................................................................MA-41
B
Back door ...........................................................BL-60
Back door trim .....................................................EI-25
Back door window ..............................................GW-7
Back window ......................................................GW-7
BACK/L - Wiring diagram ...................................LT-28
Back-up lamp ..........................................LT-28,LT-42
Back-up lamp switch (M/T) ...............................MT-13
Basic inspection ....................EC-64,EC-412,EC-672
Battery .................................................................SC-3
Baulk ring (M/T) ....................................MT-19,MT-24
Blower motor .....ATC-67,ATC-73,ATC-111,MTC-13,
MTC-17
,MTC-20
Blower resistor ................................................MTC-21
Blower unit .....................................ATC-109,MTC-20
Brake booster ....................................................BR-17
Brake fluid change ...............................................BR-9
Brake fluid level ................................................MA-38