2003 NISSAN X-TRAIL pcv valve

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

POSITIVE CRANKCASE VENTILATION
EC-479
[QR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC

PCV VALVE VENTILATION HOSE
1. Check hoses and hose connections for leaks.
2. Disconnect all hoses and clean with compressed air. If any hose
cannot be freed of obstructions, replace.
S-ET277

EC-510
[QR (WITHOUT 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-566, "
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 CheckEBS010WY
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 two or three times to release all fuel
pressure.
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 two or three times to release all fuel
pressure.
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-870
[QR (WITHOUT EURO-OBD)]
POSITIVE CRANKCASE VENTILATION

POSITIVE CRANKCASE VENTILATIONPFP:11810
DescriptionEBS01156
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 InspectionEBS01157
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

POSITIVE CRANKCASE VENTILATION
EC-871
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC

PCV VALVE VENTILATION HOSE
1. Check hoses and hose connections for leaks.
2. Disconnect all hoses and clean with compressed air. If any hose
cannot be freed of obstructions, replace.
S-ET277

IDX-7
A
C
D
E
F
G
H
I
J
K
L B
IDX
ALPHABETICAL INDEX
Park/neutral position switch (A/T) .................... AT-100
Park/neutral position switch (M/T) ..................... MT-13
PCV (positive crankcase ventilation) . EC-478, EC-870
PGC/V - Wiring diagram .................................. EC-267
PHASE - Wiring diagram ................... EC-255, EC-648
Pilot bushing replacement - See Pilot
converter(QR20DEQR25DE) ........................... EM-82
Piston assembly(QR20DEQR25DE) .............. EM-103
Piston pin inspection(QR20DEQR25DE) ......... EM-99
Piston pin inspection(YD22DDTi) .................... EM-222
Piston ring inspection(QR20DEQR25DE) ...... EM-100
Piston ring inspection(YD22DDTi) ................... EM-227
Piston to bore clearance(QR20DEQR25DE) . EM-103
Piston to bore clearance(YD22DDTi) .............. EM-230
PNP/SW - Wiring diagram EC-375, EC-727, EC-1183,
EC-1480
PNPSW1 - Wiring diagram .............................. EC-817
POS - Wiring diagram ........................ EC-248, EC-640
POWER - Wiring diagram .................................... PG-3
Power antenna .................................................. AV-41
Power door lock .................................................. BL-22
Power seat ......................................................... SE-10
Power socket ................................................... WW-29
Power steering fluid level ......................... PS-6, MA-44
Power steering gear .......................................... PS-13
Power steering oil pressure switch EC-1186, EC-1483
Power steering oil pump .................................... PS-24
Power steering pressure (PSP) sensor .......... EC-274,
EC-656
Power supply routing ........................................... PG-2
Power window .................................................. GW-40
Precations for Leak detection dye ................... ATC-12
Precautions (General) .......................................... GI-4
Pre-delivery inspection ........................................ MA-4
Pressure plate - See Clutch cover ..................... CL-14
PRGVLV - Wirng diagram ............................... EC-810
Propeller shaft ..................................................... PR-3
Propeller shaft on vehicle service ........................ PR-3
PS/SEN - Wiring diagram .................. EC-275, EC-657
PST/SW - Wiring diagram ............. EC-1187, EC-1484
Q
Quick-glow system ........................ EC-1169
, EC-1457
R
R/FOG - Wiring diagram ..................................... LT-56
Radiator(QR20DEQR25DE) ................ CO-12, CO-14
Radiator(YD22DDTi) ............................ CO-34, CO-38
Radio - See Audio ............................................... AV-4
Rear air spoiler .................................................... EI-30
Rear bumper ........................................................ EI-17
Rear disc brake ................................................. BR-32
Rear door ............................................................ BL-18
Rear fog lamp ..................................................... LT-56
Rear panel finisher .............................................. EI-31
Rear seat ........................................................... SE-31
Rear seat belt ...................................................... SB-4
Rear side window ............................................. GW-13
Rear suspension ............................................... RSU-5
Rear washer .................................................... WW-14
Rear window defogger ...................................... GW-17
Rear wiper ....................................................... WW-14
Refrigerant connection precaution ..................... ATC-5
Refrigerant discharging evacuating charging ATC-141
Refrigerant general precaution .......................... ATC-5
Refrigerant lines ............................................. ATC-141
Refrigerant pressure sensor EC-451, EC-843, ATC-18,
ATC-94
, ATC-157
Refrigeration cycle ........................................... ATC-18
Release bearing (clutch) .................................... CL-12
Removal and installation (A/T) ......................... AT-413
Removal and installation (Transfer) ................... TF-55
Reverse idler shaft (M/T) ...................... MT-20, MT-25
Reverse lamp switch (M/T) - See Back-up lamp switch
(M/T) .................................................................. MT-13
Reverse main gear (M/T) ...................... MT-20, MT-25
Rocker cover(QR20DEQR25DE) .................... EM-42
Rocker cover(YD22DDTi) ............................... EM-168
Room lamp ......................................................... LT-76
Room lamp - See Interior lamp ........................... LT-76
ROOM/L - Wiring diagram .................................. LT-76
RP/SEN - Wiring diagram .................. EC-452, EC-844
RRO2 - Wiring diagram ..................... EC-777, EC-793
S
S/LOCK - Wiring diagram ....................... BL-24
, BL-45
S/SIG - Wiring diagram .................. EC-1199, EC-1496
SCTC/V - Wiring diagram ............. EC-1095, EC-1129,
EC-1136
, EC-1141, EC-1146, EC-1384, EC-1418,
EC-1424
, EC-1429, EC-1434
SEAT - Wiring diagram ...................................... SE-11
Seat belt inspection .......................................... MA-45
Seat belt pre-tensioner disposal ..................... SRS-42
Seat belt, front ..................................................... SB-3
Seat belt, rear ...................................................... SB-4
Seat, front .......................................................... SE-24
Seat, rear ........................................................... SE-31
Self-diagnosis (Transfer) ................................... TF-30
SEN/PW - Wiring diagram ................. EC-369, EC-721
Sheft warning system ...................................... BL-104
SHIFT - Wiring diagram ................................... AT-399
Shift control components (M/T) ............. MT-22, MT-27
Shift fork (M/T) ...................................... MT-22, MT-27
Shift lever ........................................................... MT-14
Shift lock system .............................................. AT-398
Shift schedule .................................................. AT-530
Shift solenoid valve A (A/T) ............................. AT-128
Shift solenoid valve B (A/T) ............................. AT-128
Side air bag (satellite) sensor ......................... SRS-39
Side window - See Rear side window ............... GW-13
Spark plug replacement(QR20DEQR25DE) ... MA-26
Spark plug(QR20DEQR25DE) ........................ EM-30
Specification value ............................. EC-119, EC-566
Speedometer ........................................................ DI-4
Spiral cable ..................................................... SRS-33