fuel cap release NISSAN X-TRAIL 2003 Electronic Repair Manual

EC-20
[QR (WITH EURO-OBD)]
PREPARATION
PREPARATION
PFP:00002
Special Service ToolsEBS00B0M
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolsEBS00B0N
Tool number
Tool nameDescription
KV10117100
Heated oxygen
sensor wrenchLoosening or tightening heated oxygen sensors
with 22 mm (0.87 in) hexagon nut
KV10114400
Heated oxygen
sensor wrenchLoosening or tightening heated oxygen sensors
a: 22 mm (0.87 in)
S-NT379
S-NT636
Tool name (Kent-
Moore No.)Description
Quick connector
releaseRemoving fuel tube quick connectors in engine
room
(Available in SEC. 164 of PARTS CATALOG:
Part No. 16441 6N210)
Fuel filler cap adapter Checking fuel tank vacuum relief valve opening
pressure
Socket wrench Removing and installing engine coolant
temperature sensor
PBIC0198E
S-NT653
S-NT705

DTC P0420 THREE WAY CATALYST FUNCTION
EC-229
[QR (WITH EURO-OBD)]
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DTC P0420 THREE WAY CATALYST FUNCTIONPFP:20905
On Board Diagnosis LogicEBS00B6A
The ECM monitors the switching frequency ratio of heated oxygen
sensors 1 and 2.
A three way catalyst (Manifold) with high oxygen storage capacity
will indicate a low switching frequency of heated oxygen sensor 2.
As oxygen storage capacity decreases, the heated oxygen sensor 2
switching frequency will increase.
When the frequency ratio of heated oxygen sensors 1 and 2
approaches a specified limit value, the three way catalyst (Manifold)
malfunction is diagnosed.
DTC Confirmation ProcedureEBS00B6B
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
TESTING CONDITION:
lOpen engine hood before conducting the following procedure.
lDo not hold engine speed for more than the specified minutes below.
1. Turn ignition switch “ON”.
2. Select “DTC & SRT CONFIRMATION” then “SRT WORK SUP-
PORT”modewithCONSULT-II.
3. Start engine.
4. Rev engine up to 2,000 to 3,000 rpm and hold it for 3 consecu-
tive minutes then release the accelerator pedal completely.
If "INCMP" of "CATALYST" changed to "COMPLT", go to step 7
5. Wait 5 seconds at idle.
PBIB0067E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0420
0420Catalyst system effi-
ciency below threshold
lThree way catalyst (Manifold) does not oper-
ate properly.
lThree way catalyst (Manifold) does not have
enough oxygen storage capacity.
lThree way catalyst (Manifold)
lExhaust tube
lIntake air leaks
lFuel injectors
lFuel injector leaks
lSpark plug
lImproper ignition timing
PBIB0566E

PREPARATION
EC-385
[QR (WITHOUT EURO-OBD)]
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PREPARATIONPFP:00002
Special Service ToolsEBS00BEP
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolsEBS00BEQ
Tool number
To o l n a m eDescription
KV10117100
Heated oxygen
sensor wrenchLoosening or tightening heated oxygen sensors
with 22 mm (0.87 in) hexagon nut
KV10114400
Heated oxygen
sensor wrenchLoosening or tightening heated oxygen sensors
a: 22 mm (0.87 in)
S-NT379
S-NT636
Tool name (Kent-
Moore No.)Description
Quick connector
releaseRemoving fuel tube quick connectors in engine
room
(Available in SEC. 164 of PARTS CATALOG:
Part No. 16441 6N210)
Fuel filler cap adapter Checking fuel tank vacuum relief valve opening
pressure
Socket wrench Removing and installing engine coolant
temperature sensor
PBIC0198E
S-NT653
S-NT705

PRECAUTIONS
EM-5
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[QR20DE]PRECAUTIONSPFP:00001
Precautions for Drain CoolantEBS009QD
lDrain coolant when engine is cooled.
Precautions for Disconnecting Fuel PipingEBS009QE
lBefore starting work, make sure no fire or spark producing items are in the work area.
lRelease fuel pressure before disassembly.
lAfter disconnecting pipes, plug openings to stop fuel leakage.
Precautions for Removal and DisassemblyEBS009QF
lWhen instructed to use special service tools, use the specified tools. Always be careful to work safely,
avoid forceful or uninstructed operations.
lExercise maximum care to avoid damage to mating or sliding surfaces.
lCover openings of engine system with tape or the equivalent, if necessary, to seal out foreign materials.
lMark and arrange disassembly parts in an organized way for easy troubleshooting and re-assembly.
lWhen loosening nuts and bolts, as a basic rule, start with the one furthest outside, then the one diagonally
opposite, and so on. If the order of loosening is specified, do exactly as specified.
Precautions for Inspection, Repair and ReplacementEBS009QG
lBefore repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way,
and replace if necessary.
Precautions for Assembly and InstallationEBS009QH
lUse torque wrench to tighten bolts or nuts.
lWhen tightening nuts and bolts, as a basic rule, equally tighten in several different steps starting with the
ones in center, then ones on inside and outside diagonally in this order. If the order of tightening is speci-
fied, do exactly as specified.
lReplace with new gasket, packing, oil seal or O-ring.
lThoroughly wash, clean, and air-blow each part. Carefully check oil or coolant passages for any restriction
and blockage.
lAvoid damaging sliding or mating surfaces. Completely remove foreign materials such as cloth lint or dust.
Before assembly, oil sliding surfaces well.
lRelease air within route after draining coolant.
lAfter repairing, start engine and increase engine speed to check coolant, fuel, oil, and exhaust systems
for leakage.
Parts Requiring Angular TighteningEBS009QI
lUse an angle wrench for the final tightening of the following engine parts.
–Cylinder head bolts
–Lower cylinder block bolts
–Connecting rod cap bolts
–Crankshaft pulley bolt (No angle wrench is required as the bolt flange is provided with notches for angular
tightening)
lDo not use a torque value for final tightening.
lThe torque value for these parts are for a preliminary step.
lEnsure thread and seat surfaces are clean and coated with engine oil.

EM-18
[QR20DE]
INTAKE MANIFOLD
5. Disconnect fuel hose quick connector on engine side (The same
apply to the quick connector on vehicle side).
lUsing tool of quick connector release (here in after “release”),
perform the following steps to disconnect quick connector.
a. Remove quick connector cap.
b. With the sleeve side of release facing quick connector, install
release onto fuel tube.
c. Insert release into quick connector until sleeve contacts and
goes no further. Hold the release on that position.
CAUTION:
Inserting the release hard will not disconnect quick connec-
tor. Hold release where it contacts and goes no further.
d. Draw and pull out quick connector straight from fuel tube.
CAUTION:
lPull quick connector holding A position in illustration.
lDo not pull with lateral force applied. O-ring inside quick connector may be damaged.
lPrepare container and cloth beforehand as fuel will leak out.
lAvoid fire and sparks.
lBe sure to cover openings of disconnected pipes with plug or plastic bag to avoid fuel leakage
and entry of foreign materials.
6. Loosen mounting bolts diagonally, and remove electric throttle control actuator.
CAUTION:
Handle carefully to avoid any shock.
7. Disconnect intake manifold collector harness, vacuum hose, and PCV hose.
CAUTION:
lCover engine openings to avoid entry of foreign materials.
KBIA0268E
PBIC0012E
KBIA0230E

FUEL INJECTOR AND FUEL TUBE
EM-29
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FUEL INJECTOR AND FUEL TUBEPFP:16600
Removal and InstallationEBS009QY
CAUTION:
lApply new engine oil when installing the parts that specified to do so in the figure.
lDo not remove or disassembly parts unless instructed as shown in the figure.
REMOVAL
1. Release fuel pressure. refer toEC-34, "FUEL PRESSURE RELEASE"(WITH EURO-OBD),EC-399,
"FUEL PRESSURE RELEASE"(WITHOUT EURO-OBD).
2. Remove air duct, air cleaner case (upper) assembly.
3. Disconnect fuel hose quick connector at fuel tube side.
lRegarding how to disconnect and connect quick connector, Refer toEM-17, "INTAKE MANIFOLD".
CAUTION:
lPrepare a container of cloth for spilled fuel.
lThis operation should be performed in a place where free from fire.
lWhile hoses are disconnected seal their openings with vinyl bag or similar material to prevent for-
eign material from entering them.
4. Disconnect intake manifold collector. Refer toEM-17, "
INTAKE MANIFOLD".
5. Disconnect sub-harness for injector at engine front side, and remove it from bracket.
6. Loosen mounting bolts in the reverse order in the figure, and
remove fuel tube and fuel injector assembly.
7. Remove fuel injector.
lRelease clip and remove it.
lPull fuel injector straight out of fuel tube.
lBe careful not to damage nozzle part.
lAvoid any impact such as a dropping.
lDo not disassemble or adjust it.
KBIA0238E
1 Fuel hose 2 Quick connector cap 3 Sub harness
4Fueltube 5Clip 6O-ring
7 Fuel injector 8 Insulator
KBIA0239E

EM-102
[YD22DDTi]
PRECAUTIONS
[YD22DDTi]PRECAUTIONSPFP:00001
Precautions for Drain CoolantEBS00BNO
lDrain coolant when engine is cooled.
Precautions for Disconnecting Fuel PipingEBS00BNP
lBefore starting work, make sure no fire or spark producing items are in the work area.
lRelease fuel pressure before disassembly.
lAfter disconnecting pipes, plug openings to stop fuel leakage.
Precautions for Removal and DisassemblyEBS00BNQ
lWhen instructed to use special service tools, use the specified tools. Always be careful to work safely,
avoid forceful or uninstructed operations.
lExercise maximum care to avoid damage to mating or sliding surfaces.
lCover openings of engine system with tape or the equivalent, if necessary, to seal out foreign materials.
lMark and arrange disassembly parts in an organized way for easy troubleshooting and re-assembly.
lWhen loosening nuts and bolts, as a basic rule, start with the one furthest outside, then the one diagonally
opposite, and so on. If the order of loosening is specified, do exactly as specified.
Precautions for Inspection, Repair and ReplacementEBS00BNR
lBefore repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way,
and replace if necessary.
Precautions for Assembly and InstallationEBS00BNS
lUse torque wrench to tighten bolts or nuts.
lWhen tightening nuts and bolts, as a basic rule, equally tighten in several different steps starting with the
ones in center, then ones on inside and outside diagonally in this order. If the order of tightening is speci-
fied, do exactly as specified.
lReplace with new gasket, packing, oil seal or O-ring.
lThoroughly wash, clean, and air-blow each part. Carefully check oil or coolant passages for any restriction
and blockage.
lAvoid damaging sliding or mating surfaces. Completely remove foreign materials such as cloth lint or dust.
Before assembly, oil sliding surfaces well.
lRelease air within route after draining coolant.
lAfter repairing, start engine and increase engine speed to check coolant, fuel, oil, and exhaust systems
for leakage.
Parts Requiring Angular TighteningEBS00BNT
lUse an angle wrench for the final tightening of the following engine parts:
–Cylinder head bolts
–Main bearing cap bolts
–Connecting rod cap nuts
–Crankshaft pulley bolt (No angle wrench is required as the bolt flange is provided with notches for angular
tightening)
lDo not use a torque value for final tightening.
lThe torque value for these parts are for a preliminary step.
lEnsure thread and seat surfaces are clean and coated with engine oil.

FUEL SYSTEM
FL-3
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FUEL SYSTEMPFP:17503
Checking Fuel LinesEBS00BKP
Inspect fuel lines, filler cap and tank for improper attachment, leaks,
cracks, damage, loose connections, chafing or deterioration.
If necessary, repair or replace faulty parts.
General PrecautionsEBS00BKQ
WA RN ING:
when replacing fuel line parts, be sure to observe the following.
lPut a “ CAUTION: FLAMABLE” sign in workshop.
lBe sure to work in a well-ventilated area and furnish workshop with a CO2fire extinguisher.
lDo not smoke while servicing fuel system, keep open flames and spark away from work area.
CAUTION:
lBefore removing fuel line parts, carry out the following procedures.
–a) Put drained fuel in an explosion-proof container and put the lid on securely, keep the container
in safe area.
–b) Release fuel pressure from fuel line, Refer toEC-34, "Fuel Pressure Check",EC-399, "Fuel
Pressure Check".
–c) Disconnect battery ground cable.
lAlways replace O-ring and clamps with new ones.
lDo not tighten hose clamps excessively to avoid damaging hoses.
lDo not kink or twist tubes when they are being installed.
lAfter installing tubes, run engine and check for fuel leaks at connections.
SMA803A

FL-4
[QR20DE]
FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY
FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY
PFP:17042
Removal and InstallationEBS00BKR
REMOVAL
WAR NIN G:
Be sure to read “General Precautions” when working on fuel system. Refer toFL-3, "
General Precau-
tions"
1. Release fuel pressure from fuel line.
Refer toEC-34, "
FUEL PRESSURE RELEASE"(WITH EURO-
OBD),EC-399, "
FUEL PRESSURE RELEASE"(WITHOUT
EURO-OBD).
2. Open fuel filer lid.
3. Open the filler cap and release the pressure inside the fuel tank.
4. Check fuel level on level place. If gauge indicates more than the
level shown in figure (full or almost full), drain fuel from fuel tank
until gauge indicates level shown in figure or below.
In case of fuel pump does not operate, take following procedure.
a. Insert fuel tube of less than 25 mm (0.98 in) in diameter into fuel
filler tube through fuel filler opening to draw fuel from fuel filler
tube.
b. Disconnect fuel filler hose from fuel filler tube.
c. Insert fuel tube into fuel tank through fuel filler hose to draw fuel
from fuel tank.
lAs a guide, fuel level becomes the position shown in figure or
below when approximately 15 liter (13-1/4 lmp qt) of fuel are drained from fuel position.
KBIA0278E
1Lockring 2Main fuel level sensor unit, fuel filter
and fuel pump assembly3Jet pump, fuel hose and jet pump inlet
assembly
4 Chamber 5 Seal packing 6 Sub fuel level sensor unit
KBIA0280E
FEL0403D

FUEL TANK
FL-9
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FUEL TANKPFP:17202
Removal and InstallationEBS00BKT
REMOVAL
WA RN ING:
Be sure to read “General Precautions” when working on fuel system. Refer toFL-3, "
General Precau-
tions".
1. Release fuel pressure from fuel line, Refer toEC-34, "
FUEL
PRESSURE RELEASE",EC-399, "FUEL PRESSURE
RELEASE".
2. Open the fuel filler cap and release the pressure inside the fuel
tank.
3. Remove rear seat bottom.
4. Remove inspection hole cover, harness connector and fuel feed
hose.
5. Drain fuel from fuel tank if necessary. For the draining proce-
dure, refer to Step 4 in removal ofFL-4, "
FUEL LEVEL SENSOR
UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY".
CAUTION:
For the safety work and to maintain fuel tank gravity at center, drain fuel to the level where fuel
tank weight at left and right becomes equal.
6. Remove the quick connector.
lPut mating marks on hoses for correct installation.
7. Remove exhaust center tube and insulator.
PBIC0246E
1 Fuel filler cap 2 Grommet 3 Fuel filler tube
4 Vent hose 5 Vent tube 6 Fuel tank
7 Fuel filler hose 8 Fuel tank band 9 Fuel tank protector
KBIA0280E