pcv valve NISSAN X-TRAIL 2003 Service Repair Manual

GI-48
TERMINOLOGY

Nonvolatile random access memory NVRAM ***
On board diagnostic system OBD system Self-diagnosis
Open loop OL Open loop
Oxidation catalyst OC Catalyst
Oxidation catalytic converter system OC system ***
Oxygen sensor O2S Exhaust gas sensor
Park position switch *** Park switch
Park/neutral position switch PNP switchPark/neutral switch
Inhibitor switch
Neutral position switch
Periodic trap oxidizer system PTOX system ***
Positive crankcase ventilation PCV Positive crankcase ventilation
Positive crankcase ventilation valve PCV valve PCV valve
Powertrain control module PCM ***
Programmable read only memory PROM ***
Pulsed secondary air injection control sole-
noid valvePAIRC solenoid valve AIV control solenoid valve
Pulsed secondary air injection system PAIR system Air induction valve (AIV) control
Pulsed secondary air injection valve PAIR valve Air induction valve
Random access memory RAM ***
Read only memory ROM ***
Scan tool ST ***
Secondary air injection pump AIR pump ***
Secondary air injection system AIR system ***
Sequential multiport fuel injection system SFI system Sequential fuel injection
Service reminder indicator SRI ***
Simultaneous multiport fuel injection sys-
tem*** Simultaneous fuel injection
Smoke puff limiter system SPL system ***
Supercharger SC ***
Supercharger bypass SCB ***
System readiness test SRT ***
Thermal vacuum valve TVV Thermal vacuum valve
Three way catalyst TWC Catalyst
Three way catalytic converter system TWC system ***
Three way + oxidation catalyst TWC + OC Catalyst
Three way + oxidation catalytic converter
systemTWC + OC system ***
Throttle body TBThrottle chamber
SPI body
Throttle body fuel injection system TBI system Fuel injection control
Throttle position TP Throttle position
Throttle position sensor TPS Throttle sensor
Throttle position switch TP switch Throttle switch
Torque converter clutch solenoid valve TCC solenoid valveLock-up cancel solenoid
Lock-up solenoid NEW TERMNEW ACRONYM /
ABBREVIATIONOLD TERM

INTAKE MANIFOLD
EM-17
[QR]
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INTAKE MANIFOLDPFP:14003
Removal and Installation (QR20DE)EBS00KNC
REMOVAL
1. Release fuel pressure. Refer to EC-48, "FUEL PRESSURE RELEASE" (WITH EURO-OBD) or EC-510,
"FUEL PRESSURE RELEASE" (WITHOUT EURO-OBD).
2. Remove air cleaner case upper, mass air flow sensor and air duct assembly. Refer to EM-15, "
AIR
CLEANER AND AIR DUCT" .
3. Remove quick connector caps, and disconnect quick connectors
at engine side and vehicle side. Refer to EM-32, "
Removal and
Installation (QR20DE)" .
4. Remove electric throttle control actuator with the following procedure:
a. Disconnect harness connector.
1. Vacuum hose 2. Intake manifold 3. PCV hose
4. Bracket 5. Gasket 6. Electric throttle control actuator
7. Gasket 8. Intake manifold support 9. Gasket
10. Vacuum hose 11.EVAP canister purge volume con-
trol solenoid valve12. Vacuum hose
13. Bracket 14. Bracket
PBIC2172E
PBIC2175E

EM-20
[QR]
INTAKE MANIFOLD

Removal and Installation (QR25DE)EBS011TH
REMOVAL
1. Release fuel pressure. Refer to EC-48, "FUEL PRESSURE RELEASE" (WITH EURO-OBD) or EC-510,
"FUEL PRESSURE RELEASE" (WITHOUT EURO-OBD).
2. Remove air cleaner case upper, mass air flow sensor and air duct assembly. Refer to EM-15, "
AIR
CLEANER AND AIR DUCT" .
3. Remove quick connector caps, and disconnect quick connectors
at engine side and vehicle side. Refer to EM-37, "
Removal and
Installation (QR25DE)" .
4. Remove electric throttle control actuator with the following procedure:
1. Bracket 2. PCV hose 3. Intake manifold collector
4. Gasket 5. Electric throttle control actuator 6. Intake manifold rear support
7.EVAP canister purge volume control
solenoid valve8. Vacuum hose 9. Intake manifold
10. Vacuum reservoir tank 11. VIAS control solenoid valve 12. Vacuum hose
13. Bracket 14. Intake manifold support 15. Vacuum reservoir tank bracket
PBIC2174E
PBIC2175E

EM-42
[QR]
ROCKER COVER

ROCKER COVERPFP:13264
Removal and InstallationEBS00KNI
REMOVAL
1. Disconnect PCV hose from rocker cover.
2. Remove ignition coil. Refer to EM-29, "
IGNITION COIL" .
3. Loosen bolts in reverse order shown in the figure.
1. PCV hose 2. O-ring 3. PCV valve
4. Oil filler cap 5. Rocker cover 6. Rocker cover gasket
PBIC2349E
KBIA0242E

TIMING CHAIN
EM-45
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Hood assembly; Refer to BL-12, "HOOD" .

RH and LH undercovers

PCV hose; Refer to EM-17, "INTAKE MANIFOLD" .

Ignition coil; Refer to EM-29, "IGNITION COIL" .

Rocker cover; Refer to EM-42, "ROCKER COVER" .

Engine coolant reservoir tank; Refer to CO-12, "RADIATOR" .

Drive belt; Refer to EM-13, "REMOVAL" .

Alternator; Refer to SC-12, "CHARGING SYSTEM" .

Drive belt auto-tensioner; Refer to EM-14, "REMOVAL" .

Exhaust front tube; Refer to EX-2, "EXHAUST SYSTEM" .
2. Remove A/C compressor from engine. Temporarily secure A/C compressor to vehicle side with a rope to
avoid putting a load on them.
3. Remove bracket mounting bolts for fixing A/C piping on right strut housing and exhaust manifold cover.
Doing so simplifies moving.
4. Remove power steering oil pump with piping connected, and secure it to vehicle side temporarily. Refer to
PS-34, "
HYDRAULIC LINE" .
5. Remove power steering reservoir tank from bracket to move power steering piping. Refer to PS-34,
"HYDRAULIC LINE" .
CAUTION:
To avoid power steering fluid leakage, temporarily fix power steering reservoir tank vertically.
6. Install engine slingers into front left of cylinder head and rear
right of cylinder head.

Use alternator bracket mounting bolt holes for the front side.
7. Lift with hoist, and support the engine posture.
8. Remove RH engine mounting insulator and bracket. Refer to EM-78, "
ENGINE ASSEMBLY" .
9. Remove center member and rear engine mounting bracket. Refer to EM-78, "
ENGINE ASSEMBLY" .
10. Drain engine oil. Refer to LU-8, "
Changing Engine Oil" .
11. Remove oil pan (upper and lower), and oil strainer. Refer to EM-25, "
OIL PAN AND OIL STRAINER" .
12. Remove intake valve timing control cover.

Loosen bolts in reverse order as shown in the figure.

U s e a s e a l c u t t e r ( s p e c i a l s e r v i c e t o o l : K V 1 0 1111 0 0 ) o r e q u i v -
alent tool to cut liquid gasket for removal.
CAUTION:
Be careful not to damage mounting surface.
13. Pull chain guide between camshaft sprockets out through front cover.
14. Set No. 1 cylinder at TDC on its compression stroke with the following procedure:Slinger bolts:
Front
: 57.9 N·m (5.9 kg-m, 43 ft-lb)
Rear
: 28.0 N·m (2.9 kg-m, 21 ft-lb)
SBIA0271E
KBIA0085E

EM-120
[QR]
SERVICE DATA AND SPECIFICATIONS (SDS)

Oil strainer M6 bolt
8.8 (0.90, 78) *2
M8 bolt 21.6 (2.2, 16)
Ignition coil
6.4 (0.65, 57) *
2
Spark plug24.5 (2.5, 18)
*1 Fuel tube1) 10.1 (1.0, 7)
2) 23.6 (2.4, 17)
*1 Rocker cover 1)
2.0 (0.20, 18) *
2
2)
8.3 (0.85, 73) *2
PCV valve
2.5 (0.26, 22) *2
Intake valve timing control solenoid valve
6.4 (0.65, 57) *2
*1 Intake valve timing control cover 12.8 (1.3, 9)
Camshaft position sensor (PHASE)
6.4 (0.65, 57) *
2
Camshaft sprockets (Intake and Exhaust) 142 (14, 105)
Chain tensioner
7.0 (0.71, 62) *
2
*1 Camshaft bracket 1) 2.0 (0.2, 1)
2) 5.9 (0.6, 4)
3) 10.4 (1.1, 8)
Crankshaft pulley 1) 42.1 (4.3, 31)
2) 60° (Angle tightening)
*1 Front cover 12.8 (1.3, 9)
Timing chain slack guide 16.7 (1.7, 12)
Timing chain tension guide 16.7 (1.7, 12)
Balancer unit timing chain tensioner
7.0 (0.71, 62) *
2
*1 Balancer unit 1) 48.1 (4.9, 35)
2) 90° (Angle tightening)
3) 0 (0, 0)
4) 48.1 (4.9, 35)
5) 90° (Angle tightening)
*1 Cylinder head 1) 5.0 (0.51, 4)
2) 60° (Angle tightening)
3) 0 (0.0, 0)
3) 39.2 (4.0, 29)
4) 75° (Angle tightening)
5) 75° (Angle tightening)
Flywheel (M/T)108 (11, 80)
Drive plate (A/T)108 (11, 80)
Connecting rod bearing cap 1) 19.6 (2.0, 14)
2) 90° (Angle tightening)
*1 Lower cylinder block M8 bolt 1) 25.1 (2.6, 19)
M10 bolt 2) 39.2 (4.0, 29)
M10 bolt 3) 60° (Angle tightening)
Signal plate13.0 (1.3, 10)
Water drain plug
9.8 (1.0, 87) *
2

EC-48
[QR (WITH EURO-OBD)]
BASIC SERVICE PROCEDURE

12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the
specifications.
13. If idle speed and ignition timing are not within the specification, Idle Air Volume Learning will not be carried
out successfully. In this case, find the cause of the incident by referring to the DIAGNOSTIC PROCE-
DURE below.
DIAGNOSTIC PROCEDURE
If idle air volume learning cannot be performed successfully, proceed as follows:
1.Check that throttle valve is fully closed.
2.Check PCV valve operation.
3.Check that downstream of throttle valve is free from air leakage.
4.When the above three items check out OK, engine component parts and their installation condi-
tion are questionable. Check and eliminate the cause of the incident.
It is useful to perform EC-119, "
TROUBLE DIAGNOSIS - SPECIFICATION VALUE" .
5.If any of the following conditions occur after the engine has started, eliminate the cause of the
incident and perform Idle Air Volume Learning all over again:

Engine stalls.

Erroneous idle.
Fuel Pressure CheckEBS010LI
FUEL PRESSURE RELEASE
With CONSULT-II
1. Turn ignition switch ON.
2. Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT”
mode with CONSULT-II.
3. Start engine.
4. After engine stalls, crank it 2 or 3 times to release all fuel pres-
sure.
5. Turn ignition switch OFF.
Without CONSULT-II
1. Remove fuel pump fuse located in fuse box.
2. Start engine.
3. After engine stalls, crank it 2 or 3 times to release all fuel pres-
sure.
4. Turn ignition switch OFF.
5. Reinstall fuel pump fuse after servicing fuel system.
FUEL PRESSURE CHECK
Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.
ITEM SPECIFICATION
Idle speed QR20DE with M/T models: 650±50 rpm (in Neutral position)
Except above: 700±50 rpm [in P or N (A/T), Neutral (M/T) position]
Ignition timing M/T: 15±5° BTDC (in Neutral position)
A/T: 15±5° BTDC (in P or N position)
SEF214Y
PBIB0508E

EC-184
[QR (WITH EURO-OBD)]
DTC P0133 HO2S1

DTC Confirmation ProcedureEBS010O6
CAUTION:
Always drive vehicle at a safe speed.
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.
TESTING CONDITION:

Always perform at a temperature above −10°C (14°F).

Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
WITH CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine and wait at least 10 seconds.
3. Turn ignition switch ON and select “HO2S1 (B1) P0133” of “HO2S1” in “DTC WORK SUPPORT” mode
with CONSULT-II.
4. Touch “START”.
5. Start engine and let it idle for at least 3 minutes.
NOTE:
Never raise engine speed above 3,600 rpm after this step. If
the engine speed limit is exceeded, return to step 5.
6. When the following conditions are met, “TESTING” will be dis-
played on the CONSULT-II screen. Maintain the conditions con-
tinuously until “TESTING” changes to “COMPLETED”. (It will
take approximately 40 to 50 seconds.)
If “TESTING” is not displayed after 5 minutes, retry from step 2.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0133
0133Heated oxygen sensor 1
circuit slow responseThe response of the voltage signal from the
sensor takes more than the specified time.

Harness or connectors
(The sensor circuit is open or shorted.)

Heated oxygen sensor 1

Fuel pressure

Injectors

Intake air leaks

Exhaust gas leaks

PCV valve

Mass air flow sensor
SEF338Z
ENG SPEED QR20DE: 1,650 - 3,600 rpm
QR25DE: 1,600 - 3,300 rpm
Vehicle speed More than 80 km/h (50 MPH)
B/FUEL SCHDL QR20DE: 4.0 - 14.5 msec
QR25DE: 4.3 - 14.5 msec
Selector lever Suitable position
SEF339Z

EC-190
[QR (WITH EURO-OBD)]
DTC P0133 HO2S1

7. CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between HO2S1 terminal 2 and ECM terminal 35.
Refer to Wiring Diagram.
2. Check harness continuity between ECM terminal 35 or HO2S1 terminal 2 and ground.
Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK MASS AIR FLOW SENSOR
Refer to EC-155, "
Component Inspection" .
OK or NG
OK >> GO TO 9.
NG >> Replace mass air flow sensor.
9. CHECK PCV VALVE
Refer to EC-478, "
Component Inspection" .
OK or NG
OK >> GO TO 10.
NG >> Replace PCV valve.
10. CHECK HEATED OXYGEN SENSOR 1
Refer to EC-190, "
Component Inspection" .
OK or NG
OK >> GO TO 11.
NG >> Replace heated oxygen sensor 1.
11 . CHECK INTERMITTENT INCIDENT
Refer to EC-123, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS010OA
HEATED OXYGEN SENSOR 1
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “MANU TRIG” and adjust “TRIGGER POINT” to 100% in “DATA MONITOR” mode with CONSULT-
II. Continuity should exist.
Continuity should not exist.

EC-478
[QR (WITH EURO-OBD)]
POSITIVE CRANKCASE VENTILATION

POSITIVE CRANKCASE VENTILATIONPFP:11810
DescriptionEBS010VZ
SYSTEM DESCRIPTION
This system returns blow-by gas to the intake manifold.
The positive crankcase ventilation (PCV) valve is provided to conduct crankcase blow-by gas to the intake
manifold. During partial throttle operation of the engine, the intake manifold sucks the blow-by gas through the
PCV valve. Normally, the capacity of the valve is sufficient to handle any blow-by and a small amount of venti-
lating air. The ventilating air is then drawn from the air inlet tubes into the crankcase. In this process the air
passes through the hose connecting air inlet tubes to rocker cover. Under full-throttle condition, the manifold
vacuum is insufficient to draw the blow-by flow through the valve. The flow goes through the hose connection
in the reverse direction.
On vehicles with an excessively high blow-by, the valve does not
meet the requirement. This is because some of the flow will go
through the hose connection to the air inlet tubes under all condi-
tions.
Component InspectionEBS010W0
PCV (POSITIVE CRANKCASE VENTILATION) VALVE
With engine running at idle, remove PCV valve from rocker cover. A
properly working valve makes a hissing noise as air passes through
it. A strong vacuum should be felt immediately when a finger is
placed over valve inlet.
PBIB0492E
PBIB1588E
PBIB1589E