2003 NISSAN X-TRAIL low oil pressure

LU-24
[YD22DDTi]
OIL PUMP
lCalculate the clearance between inner rotor and oil pump hous-
ing as follows.
1. Measure the outer diameter of protruded portion of inner rotor
(Position 5)
2. Measure the inner diameter of oil pump housing with inside
micrometer (Position 6)
(Clearance) = (Inner diameter of oil pump housing) – (Outer
diameter of inner rotor)
Regulator Valve
1. Visually inspect components for wear and damage.
2. Check oil pressure regulator valve sliding surface and valve spring.
3. Coat regulator valve with engine oil. Check that it falls smoothly into the valve hole by its own weight.
If damaged, replace regulator valve set or oil pump housing.
4. Check regulator valve to oil pump housing clearance.
CAUTION:
Coat regulator valve with engine oil.
Check that it falls smoothly into the valve hole by its own
weight.
ASSEMBLY
lAssemble in the reverse order of disassembly.
lInstall the inner rotor and outer rotor with the punched marks on
the oil pump cover side.
lThe refill capacity depends on the oil temperature and drain
time. Use these specifications for reference only.
Always use the dipstick to the determine when the proper
amount of oil is in the engine.
PBIC0253E
Standard : 0.045 - 0.091mm (0.0018 - 0.0036 in)
SBIA0124E
Clearance 6 :
6 : 0.040 - 0.097 mm (0.0016 - 0.0038 in)
JLC358B
JLC286B

LU-26
[YD22DDTi]
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
PFP:00030
Standard and LimitEBS00CTZ
OIL PRESSURE
OIL PUMP
Unit: mm (in)
REGULATOR VALVE
Unit: mm (in)
OIL CAPACITY
Unit: · (Imp qt)
Tightening TorqueEBS00B0F
Unit: N·m (kg-m, ft-lb), N·m (kg-m, in-lb)* Engine speed rpm
Approximate discharge pressure kPa (bar, kg/cm
2,psi)
Idle speed
2,000
4,000More than 140 (1.40, 1.43, 20.3)
More than 270 (2.69, 2.75, 39.1)
More than 430 (4.29, 4.38, 62.3)
Body to outer rotor radial clearance 0.114 - 0.260 (0.0045 - 0.0102)
Inner rotor to outer rotor tip clearance Below 0.18 (0.0071)
Body to inner rotor axial clearance 0.050 - 0.090 (0.0020 - 0.0035)
Body to outer rotor axial clearance 0.030 - 0.190 (0.0012 - 0.0075)
Inner rotor to brazed portion of housing clearance 0.045 - 0.091 (0.0018 - 0.0036)
Regulator valve to oil pump cover clearance 0.040 - 0.097 (0.0016 - 0.0038)
With oil filter change Approximately 5.2 (4-5/8 Imp qt)
Without oil filter change Approximately 4.9 (4-3/8 Imp qt)
Dry engine (engine overhaul) Approximately 6.3 (5-1/2 Imp qt)
Oil pressure switch 12.3 - 17.2 (1.3 - 1.7, 9 - 12)
Oil pan drain plug 29 - 39 (3.0 - 4.0, 22 - 29)
Oil filter bracket20 -23 (2.0 - 2.4, 15 - 17)
Oil filter body20 - 24 (2.0 - 2.5, 15 - 18)
Oil pump assembly 6.4 - 7.4 (0.65 - 0.76, 57 - 65)*
Oil pump cover 5.9 - 7.8 (0.6 - 0.8, 52 - 69)*
Regulator plug40 - 68 (4.0 - 7.0, 29 - 50)
Water hose connector for oil cooler 25 - 31 (2.5 - 3.2, 18 - 23)
Connecting bolt 34.3 - 44.1 (3.5 - 4.4, 26 - 32)

MA-4
DESCRIPTION
DESCRIPTION
PFP:00000
Pre-delivery Inspection ItemsELS000AK
Shown below are Pre-delivery Inspection Items required for the new vehicle. It is recommended that
necessary items other than those listed here be added, paying due regard to the conditions in each
country.
Perform applicable items on each model. Consult text of this section for specifications.
UNDER HOOD — engine off
Radiator coolant level and coolant hose connections for leaks
Battery fluid level, specific gravity and conditions of battery terminals
Drive belts tension
Fuel filter for water or dusts (Diesel only), and fuel lines and connections for leaks
Engine oil level and oil leaks
Clutch and brake reservoir fluid level and fluid lines for leaks
Windshield and rear window washer and headlamp cleaner reservoir fluid level
Power steering reservoir fluid level and hose connections for leaks
ON INSIDE AND OUTSIDE
Remove front spring/strut spacer (If applicable)
Operation of all instruments, gauges, lights and accessories
Operation of horn(s), wiper and washer
Steering lock for operation
Check air conditioner for gas leaks
Front and rear seats, and seat belts for operation
All moldings, trims and fittings for fit and alignment
All windows for operation and alignment
Hood, trunk lid, door panels for fit and alignment
Latches, keys and locks for operation
Weatherstrips for adhesion and fit
Headlamp aiming
Tighten wheel nuts (Inc. inner nuts if applicable)
Tire pressure (Inc. spare tire)
Check front wheels for toe-in
Install clock/voltmeter/room lamp fuse (If applicable)
Install deodorizing filter to air conditioner (If applicable)
Remove wiper blade protectors (If applicable)
UNDER BODY
Manual transmission/transaxle, transfer and differential gear oil level
Brake and fuel lines and oil/fluid reservoirs for leaks
Tighten bolts and nuts of steering linkage and gear box, suspension, propeller shafts and drive shafts
Tighten rear body bolts and nuts (Models with wooden bed only)
ROAD TEST
Clutch operation
Parking brake operation
Service brake operation
Automatic transmission/transaxle shift timing and kickdown
Steering control and returnability
Engine performance
Squeaks and rattles
ENGINE OPERATING AND HOT
Adjust idle speed
Automatic transmission/transaxle fluid level

MA-38
CHASSIS AND BODY MAINTENANCE
2. Check oil level.
Balancing WheelsELS000BH
Adjust wheel balance using the road wheel center.
RotationELS000BI
lAfter rotating the tires, adjust the tire pressure.
lRetighten the wheel nuts when the vehicle has been driven for
1,000 km (600 miles) (also in cases of a flat tire, etc.).
CAUTION:
When installing wheels, tighten them diagonally by dividing
the work two to three times in order to prevent the wheels
from developing any distortion.
Checking Brake Fluid Level and LeaksELS000BJ
lIf fluid level is extremely low, check brake system for leaks.Oil grad and Viscosity:
Refer toMA-17, "
Fluids and Lubricants"
Capacity:
0.55 (1 lmp pt)
Drain plug:
:30–39N·m(3–4kg-m,22–28ft-lb)
SMA012C
SMA257A
Wheel balance (Maximum allowable unbalance):
Refer toWT-4, "
Balancing Wheels (Bonding Weight Type)".
Tightening torque of wheel nut:
98 - 117N·m (10 - 12 kg·m, 73 - 86 ft·lb)
SMA829C
SFIA0066J

PG-62
HARNESS
HO2S1H EC Heated Oxygen Sensor 1 (Front)
HO2S2 EC Heated Oxygen Sensor 1 (Rear)
HO2S2H EC Heated Oxygen Sensor 1 (Rear)
HORN WW Horn
IATS EC Intake Air Temperature Sensor
IATSEN EC Intake Air Temperature Sensor
IGNSYS EC Ignition Signal
ILL LT Illumination
INJECT EC Injector
INT/L LT Map Lamp
IVC EC Intake Valve Timing Control Solenoid Valve
IVC/V EC Intake Valve Timing Control Solenoid Valve
KS EC Knock Sensor (KS)
LOAD EC Electrical Load Signal
LPSV AT Line Pressure Solenoid Valve
MAFS EC MassAirFlowSensor(MAFS)
MAIN EC, AT Main Power Supply and Ground Circuit
METER DI Meter and Gauge
MIL EC Malfunction Indicator Lamp
MIL/DL EC MIL and Data Link Connector
MIRROR GW Door Mirror
MULTI BL Multi-Remote Control System
NATS BL Nissan Anti-Theft System
NONDTC AT Non-Detective Items
OVRCSV AT Overrun Clutch Solenoid Valve
PGC/V EC EVAP Canister Purge Volume Control Solenoid Valve
PHASE EC Camshaft Position Sensor (PHASE)
PNP/SW EC, AT Park/Neutral Position (PNP) Switch
PNPSW1 EC Park/Neutral Position (PNP) Switch
POS EC Crankshaft Position Sensor (CKPS)(POS)
POWER PG Power Supply Routing
PRGVLV EC EVAP Canister Purge Volume Control Solenoid Valve
PRWIRE BL Theft Warning System (Pre-wire)
PS/SEN EC Power Steering Pressure Sensor
PST/SW EC Power Steering Oil Pressure Switch
R/FOG LT Rear Fog Lamp
ROOM/L LT Interior Room Lamp
RP/SEN EC Refrigerant Pressure Sensor
RRO2 EC Heated Oxygen Sensor 2 (Rear)
RRO2/H EC Heated Oxygen Sensor 2 Heater (Rear)
S/LOCK BL Super Lock
S/SIG EC Start Signal
SCTC/V EC Suction Control Valve
SHIFT AT A/T Shift Lock System
SROOF BL Sunroof
SRS SRS Supplemental Restraint System (SRS)
SSV/A AT Shift Solenoid Valve A
SSV/B AT Shift Solenoid Valve B
START SC Starting System
STOP/L LT Stop Lamp
T/MTR EC Throttle Control Motor
TAIL/L LT Parking, License and Tail Lamps

PS-1
POWER STEERING SYSTEM
G STEERING
CONTENTS
C
D
E
F
H
I
J
K
L
M
SECTION
A
B
PS
POWER STEERING SYSTEM
PRECAUTIONS .......................................................... 2
Precautions for models with SRS air bag and pre-
tensioner seat belt .................................................... 2
Caution ..................................................................... 2
PREPARATION ........................................................... 3
Special Service Tools ............................................... 3
NOISE, VIBRATION, AND HARSHNESS (NVH)
TROUBLESHOOTING ................................................ 4
NVH Trouble shooting Chart .................................... 4
POWER STEERING FLUID ........................................ 5
Checking Fluid Level ................................................ 5
Checking Fluid Leak ................................................. 5
Bleeding Hydraulic System ...................................... 5
STEERING WHEEL .................................................... 6
On-Vehicle Inspection and Service .......................... 6
PLAY INSPECTION .............................................. 6
NEUTRAL POSITION INSPECTION .................... 6
STEERING TORQUE CHECK .............................. 6
STEERING ANGLE INSPECTION ........................ 6
Removal and Installation .......................................... 7
REMOVAL ............................................................. 7
INSTALLATION ..................................................... 7
STEERING COLUMN ................................................. 9
Removal and Installation .......................................... 9
REMOVAL OF LOWER JOINT AND HOLE
COVER ................................................................. 9
INSTALLATION OF LOWER JOINT AND HOLE
COVER ................................................................. 9
REMOVAL OF STEERING COLUMN ASSEM-
BLY ........................................................................ 9
INSTALLING STEERING COLUMN ASSEMBLY... 10
Disassembly and Assembly ................................... 10
DISASSEMBLY ................................................... 10
INSPECTION AFTER DISASSEMBLY. ...............11
ASSEMBLY ..........................................................11
POWER STEERING GEAR AND LINKAGE ............ 12
Removal and Installation ........................................ 12
REMOVAL ........................................................... 12
INSTALLATION ................................................... 12Components ........................................................... 14
MODEL PR24AD ................................................. 14
Disassembly and Assembly .................................... 15
DISASSEMBLY ................................................... 15
PINION GEAR ROTATION TORQUE ADJUST-
MENT .................................................................. 16
INSPECTION AFTER DISASSEMBLY ................ 16
ASSEMBLY ......................................................... 17
POWER STEERING OIL PUMP ............................... 23
On-Vehicle Inspection and Service ......................... 23
OIL PUMP PULLEY HYDRAULIC PRESSURE
INSPECTION ...................................................... 23
Removal and Installation (QR20DE engine model)... 23
REMOVAL ........................................................... 23
INSTALLATION ................................................... 23
Disassembly and Assembly(QR20DE engine
model) ..................................................................... 24
INSPECTION BEFORE DISASSEMBLY ............. 24
DISASSEMBLY ................................................... 24
INSPECTION AFTER DISASSEMBLY ................ 25
ASSEMBLY ......................................................... 25
Removal and Installation (YD22DDTi engine
model) ..................................................................... 28
Disassembly and Assembly (YD22DDTi engine
model) ..................................................................... 29
INSPECTION BEFORE DISASSEMBLY ............. 29
DISASSEMBLY ................................................... 30
INSPECTION AFTER DISASSEMBLY ................ 31
ASSEMBLY ......................................................... 31
HYDRAULIC LINE .................................................... 33
Removal and Installation ........................................ 33
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 35
Wheel ..................................................................... 35
Steering Angle ........................................................ 35
Steering Column ..................................................... 35
Steering Linkage ..................................................... 35
Steering Gear ......................................................... 36
Oil Pump ................................................................. 36
Steering Fluid .......................................................... 36

PS-6
STEERING WHEEL
STEERING WHEEL
PFP:48430
On-Vehicle Inspection and ServiceEGS0004E
PLAY INSPECTION
1. Turn steering wheel to straight-ahead position. Start engine and lightly turn steering wheel clockwise and
counter clockwise until front wheels start moving. Measure travel to starting point on circumference of
steering wheel.
2. If play is outside specifications, check following parts for proper installation: steering gear assembly, front
suspension, axles, and steering column
lCheck steering wheel for vertical, horizontal, or axial play.
lLift vehicle and check steering gear mounting bolts and nuts for looseness.
NEUTRAL POSITION INSPECTION
lAfter the wheel alignment inspection, carry out the neutral position inspection. Refer toWT-4.
lBefore removing steering wheel, check steering gear neutral position.
1. Set vehicle to straight-ahead position, and check that steering wheel is in neutral position.
2. If it is not in neutral position, remove steering wheel, and install again in properly.
3. If it is not adjusted within two teeth from center of gear, loosen tie rod lock nut. Then turn it to opposite
direction to adjust until amount of left and right becomes equal.
STEERING TORQUE CHECK
1. Stop vehicle on a dry flat paved road and apply parking brake.
2. Start engine and wait until power steering fluid warms up. Using
a preload gauge, check rotational torque of steering wheel.
3. If torque is outside specifications, check rack sliding torque and
oil pump relief pressure.
STEERING ANGLE INSPECTION
lAfter toe-in inspection, check steering angle. Place front wheels
on turning radius gauges and rear wheels on stands. Level the
vehicle. Check maximum inner and outer wheel steering angles
for LH and RH road wheels.Steering wheel play inspection standard : 0 - 35 mm (0 - 1.38 in)
Steering wheel axial endplay: : 0 mm (0 in)
Tightening torque : 140 - 160 N·m (14.2 - 16.4 kg·m,103-118 ft·lb)
Steering torque : 706 N·cm (72 kg·cm) or less
Rack sliding torque : 153 - 240N (15.5 - 24.5 kg,
34.3-54.2 lb)
Oil pump relief hydraulic
pressure: 8.3 + 0.4 - 0.2 MPa
(85+4-2kg/cm
2)
STA0005D
FAA0016D

POWER STEERING OIL PUMP
PS-23
C
D
E
F
H
I
J
K
L
MA
B
PS
POWER STEERING OIL PUMPPFP:49110
On-Vehicle Inspection and ServiceEGS000AF
OIL PUMP PULLEY HYDRAULIC PRESSURE INSPECTION
Before starting following procedure, check tension of belt.
1. Raise vehicle. Connect oil pressure gauge between oil pump
discharge connector and high pressure hose. Then bleed the
hydraulic circuit.
2. Start engine. Run engine until oil temperature reaches 50°C-
60°C (122 - 140°F)
CAUTION:
lLeave valve of hydraulic pressure gauge fully open while
starting and running engine. If engine is started with
valve closed, hydraulic pressure in oil pump goes up.
This will relief pressure along with abnormal increase of
oil temperature.
lCare must be taken to keep hose clear of belt and other parts when engine is started.
3. Fully close hydraulic pressure gauge valve with engine at idle. Measure relief pressure.
4. After measurement, open valve slowly.
CAUTION:
Never keep valve closed for 15 seconds or longer.
lIf relief pressure is outside specification, disassemble and service oil pump. Refer toPS-24, "Disas-
sembly and Assembly(QR20DE engine model)".
5. After inspection, remove oil pressure gauge from hydraulic circuit. Add fluid. Be sure to bleed the system
completely. Refer toPS-5, "
Bleeding Hydraulic System"
Removal and Installation (QR20DE engine model)EGS000AG
REMOVAL
1. Loosen adjusting screw and oil pump mounting bolt. Then, remove belt.
2. Remove union bolt and hose for oil pump.
3. Remove oil pump bracket attaching bolt.
4. Remove oil pump from vehicle.
INSTALLATION
Paying attention to following items, install in the reverse order of removal.
lAfter installation, adjust belt tension. Refer to “Accessory belt” in ”B1 Engine Body”.
lAfter installation, be sure to bleed system. Refer toPS-5, "Bleeding Hydraulic System". Relief pressure specification:
: 8.3 + 0.4 - 0.2 MPa (85 + 4 - 2 kg/cm
2)
SST834-H