
EC-17
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ECA INJECTOR CIRCUIT ..............................................1357
Component Description .......................................1357
CONSULT-II Reference Value in Data Monitor Mode
1357
ECM Terminals and Reference Value .................1357
Wiring Diagram ...................................................1358
Diagnostic Procedure ..........................................1359
Component Inspection ........................................1361
Removal and Installation .....................................1361
START SIGNAL .....................................................1362
CONSULT-II Reference Value in Data Monitor Mode
1362
ECM Terminals and Reference Value .................1362
Wiring Diagram ...................................................1363
Diagnostic Procedure ..........................................1364
FUEL PUMP CIRCUIT ...........................................1366
Description ..........................................................1366
CONSULT-II Reference Value in Data Monitor Mode
1366
ECM Terminals and Reference Value .................1366
Wiring Diagram ...................................................1368
Diagnostic Procedure ..........................................1369
Component Inspection ........................................1371
Removal and Installation .....................................1372
REFRIGERANT PRESSURE SENSOR ................1373
Component Description .......................................1373
ECM Terminals and Reference Value .................1373
Wiring Diagram ...................................................1374
Diagnostic Procedure ..........................................1375
Removal and Installation .....................................1376
ELECTRICAL LOAD SIGNAL ...............................1377
CONSULT-II Reference Value in Data Monitor Mode
1377
ECM Terminals and Reference Value .................1377
Wiring Diagram ...................................................1378
Diagnostic Procedure ..........................................1380
DATA LINK CONNECTOR ....................................1385
Wiring Diagram ...................................................1385
EVAPORATIVE EMISSION SYSTEM ....................1386
Description ..........................................................1386
Component Inspection ........................................1388
POSITIVE CRANKCASE VENTILATION ..............1389
Description ..........................................................1389
Component Inspection ........................................1389
SERVICE DATA AND SPECIFICATIONS (SDS) ...1391
Fuel Pressure ......................................................1391
Idle Speed and Ignition Timing ............................1391
Calculated Load Value ........................................1391
Mass Air Flow Sensor .........................................1391
Intake Air Temperature Sensor ...........................1391
Engine Coolant Temperature Sensor ..................1391
Heated Oxygen Sensor 1 Heater ........................1391
Heated Oxygen sensor 2 Heater .........................1391
Crankshaft Position Sensor (POS) ......................1391
Camshaft Position Sensor (PHASE) ...................1391
Throttle Control Motor ......................................... 1392
Injector ................................................................1392
Fuel Pump ...........................................................1392
YD
INDEX FOR DTC ....................................................1393
Alphabetical Index ...............................................1393
DTC No. Index .....................................................1393
PRECAUTIONS .....................................................1395
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ..............................................................1395
Precautions ..........................................................1395
Wiring Diagrams and Trouble Diagnosis .............1397
ENGINE CONTROL SYSTEM ...............................1398
System Diagram ..................................................1398
System Chart .......................................................1399
Fuel Injection Control System ..............................1399
Fuel Injection Timing Control System ..................1401
Air Conditioning Cut Control ................................1401
F u e l C u t C o n t r o l ( A t N o L o a d & H i g h E n g i n e S p e e d ) 1401
Crankcase Ventilation System .............................1402
CAN Communication ...........................................1402
BASIC SERVICE PROCEDURE ............................1404
Fuel Filter .............................................................1404
Accelerator Pedal Released Position Learning ...1404
Fuel Pressure Relief Valve ..................................1405
ON BOARD DIAGNOSTIC (OBD) SYSTEM .........1406
DTC and MI Detection Logic ...............................1406
Diagnostic Trouble Code (DTC) ..........................1406
NATS (Nissan Anti-theft System) ........................1406
Malfunction Indicator (MI) ....................................1407
TROUBLE DIAGNOSIS .........................................1409
Trouble Diagnosis Introduction ............................1409
Basic Inspection ..................................................1412
Symptom Matrix Chart .........................................1416
Engine Control Component Parts Location .........1420
Circuit Diagram ....................................................1423
ECM Harness Connector Terminal Layout ..........1425
ECM Terminals And Reference Value .................1425
CONSULT-II Function ..........................................1431
CONSULT-II Reference Value in Data Monitor Mode
1437
Major Sensor Reference Graph in Data Monitor
Mode ....................................................................1440
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT ......................................................................1441
Description ...........................................................1441
Diagnostic Procedure ..........................................1441
POWER SUPPLY CIRCUIT FOR ECM ..................1442
ECM Terminals and Reference Value ..................1442
Wiring Diagram ....................................................1443
Diagnostic Procedure ..........................................1444
Component Inspection .........................................1447
DTC U1000 CAN COMMUNICATION LINE ...........1448
Description ...........................................................1448
On Board Diagnosis Logic ...................................1448
DTC Confirmation Procedure ..............................1448
Wiring Diagram ....................................................1449
Diagnostic Procedure ..........................................1450
DTC P0100 MASS AIR FLOW SENSOR (MAFS) .1451
Component Description .......................................1451

EC-18
CONSULT-II Reference Value in Data Monitor Mode
1451
ECM Terminals and Reference Value ..................1451
On Board Diagnosis Logic ...................................1452
DTC Confirmation Procedure ..............................1452
Wiring Diagram ....................................................1453
Diagnostic Procedure ..........................................1454
Component Inspection .........................................1455
Removal and Installation .....................................1455
DTC P0115 ENGINE COOLANT TEMPERATURE
(ECT) SENSOR (CIRCUIT) ....................................1456
Description ...........................................................1456
On Board Diagnosis Logic ...................................1456
DTC Confirmation Procedure ..............................1456
Wiring Diagram ....................................................1457
Diagnostic Procedure ..........................................1458
Component Inspection .........................................1459
Removal and Installation .....................................1459
DTC P0120 ACCELERATOR PEDAL POSITION
SENSOR .................................................................1460
Description ...........................................................1460
CONSULT-II Reference Value in Data Monitor Mode
1460
ECM Terminals and Reference Value ..................1460
On Board Diagnosis Logic ...................................1461
DTC Confirmation Procedure ..............................1461
Wiring Diagram ....................................................1462
Diagnostic Procedure ..........................................1463
Component Inspection .........................................1466
Removal and Installation .....................................1467
DTC P0190 COMMON RAIL FUEL PRESSURE
SENSOR .................................................................1468
Description ...........................................................1468
CONSULT-II Reference Value in Data Monitor Mode
1468
ECM Terminals and Reference Value ..................1468
On Board Diagnosis Logic ...................................1468
DTC Confirmation Procedure ..............................1468
Wiring Diagram ....................................................1469
Diagnostic Procedure ..........................................1470
Component Inspection .........................................1471
Removal and Installation .....................................1471
DTC P0201 - P0204 FUEL INJECTOR ..................1472
Description ...........................................................1472
CONSULT-II Reference Value in Data Monitor Mode
1472
ECM Terminals and Reference Value ..................1472
On Board Diagnosis Logic ...................................1473
DTC Confirmation Procedure ..............................1474
Wiring Diagram ....................................................1475
Diagnostic Procedure ..........................................1477
Component Inspection .........................................
1478
Removal and Installation .....................................1478
DTC P0335 CRANKSHAFT POSISTION SENSOR
(TDC) ......................................................................1479
Description ...........................................................1479
CONSULT-II Reference Value in Data Monitor Mode
1479
ECM Terminals and Reference Value ..................1479On Board Diagnosis Logic ...................................1480
DTC Confirmation Procedure ...............................1480
Wiring Diagram ....................................................1481
Diagnostic Procedure ........................................... 1482
Component Inspection .........................................1482
Removal and Installation ......................................1483
DTC P0340 CAMSHAFT POSITION SENSOR ......1484
Description ...........................................................1484
ECM Terminals and Reference Value ..................1484
On Board Diagnosis Logic ...................................1484
DTC Confirmation Procedure ...............................1484
Wiring Diagram ....................................................1486
Diagnostic Procedure ........................................... 1487
Component Inspection .........................................1487
Removal and Installation ......................................1488
DTC P0500 VEHICLE SPEED SENSOR (VSS) .....1489
Description ...........................................................1489
ECM Terminals and Reference Value ..................1489
On Board Diagnosis Logic ...................................1489
Overall Function Check ........................................1489
Wiring Diagram ....................................................1490
Diagnostic Procedure ........................................... 1492
DTC P1107 ABSOLUTE PRESSURE SENSOR ....1494
Description ...........................................................1494
On Board Diagnosis Logic ...................................1494
DTC Confirmation Procedure ...............................1494
Diagnostic Procedure ........................................... 1494
DTC P1180 FUEL TEMPERATURE SENSOR .......1496
Description ...........................................................1496
CONSULT-II Reference Value in Data Monitor Mode
1496
ECM Terminals and Reference Value ..................1496
On Board Diagnosis Logic ...................................1496
DTC Confirmation Procedure ...............................1496
Wiring Diagram ....................................................1497
Diagnostic Procedure ........................................... 1498
Removal and Installation ......................................1498
DTC P1211 TCS CONTROL UNIT .........................1499
Description ...................................................
........1499
On Board Diagnosis Logic ...................................1499
DTC Confirmation Procedure ...............................1499
Diagnostic Procedure ........................................... 1499
DTC P1212 TCS COMMUNICATION LINE ............1500
Description ...........................................................1500
On Board Diagnosis Logic ...................................1500
DTC Confirmation Procedure ...............................1500
Diagnostic Procedure ........................................... 1500
DTC P1216 EDU .....................................................1501
Description ...........................................................1501
ECM Terminals and Reference Value ..................1501
On Board Diagnosis Logic ...................................1502
DTC Confirmation Procedure ...............................1502
Wiring Diagram ....................................................1503
Diagnostic Procedure ........................................... 1505
Removal and Installation ......................................1507
DTC P1217 OVERHEAT (COOLING SYSTEM) .....1508
Description ...........................................................1508
CONSULT-II Reference Value in Data Monitor Mode
1508

EC-19
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ECA ECM Terminals and Reference Value .................1508
On Board Diagnosis Logic ..................................1508
Overall Function Check .......................................1509
Wiring Diagram ...................................................1510
Diagnostic Procedure ..........................................1511
Main 12 Causes of Overheating ..........................1517
Component Inspection ........................................1518
DTC P1233 - P1234 SUCTION CONTROL VALVE 1519
Description ..........................................................1519
CONSULT-II Reference Value in Data Monitor Mode
1519
ECM Terminals and Reference Value .................1519
On Board Diagnosis Logic ..................................1520
DTC Confirmation Procedure ..............................1521
Wiring Diagram ...................................................1522
Diagnostic Procedure ..........................................1523
Component Inspection ........................................1523
Removal and Installation .....................................1524
DTC P1301 - P1304 FUEL INJECTOR ADJUST-
MENT RESISTOR .................................................. 1525
Description ..........................................................1525
ECM Terminals and Reference Value .................1525
On Board Diagnosis Logic ..................................1525
DTC Confirmation Procedure ..............................1525
Wiring Diagram ...................................................1526
Diagnostic Procedure ..........................................1527
Component Inspection ........................................1528
Removal and Installation .....................................1528
DTC P1305 FUEL LEAK .......................................1529
On Board Diagnosis Logic ..................................1529
DTC Confirmation Procedure ..............................1529
Diagnostic Procedure ..........................................1529
Removal and Installation .....................................1529
DTC P1510 ACCELERATOR PEDAL RELEASED
POSITION SWITCH ...............................................1531
Description ..........................................................1531
CONSULT-II Reference Value in Data Monitor Mode
1531
ECM Terminals and Reference Value .................1531
On Board Diagnosis Logic ..................................1532
DTC Confirmation Procedure ..............................1532
Wiring Diagram ...................................................1533
Diagnostic Procedure ..........................................1534
Component Inspection ........................................1535
Removal and Installation .....................................1535
DTC P1606 ECM ...................................................1536
Description ..........................................................1536
On Board Diagnosis Logic ..................................1536
DTC Confirmation Procedure ..............................
1536
Diagnostic Procedure ..........................................1536
DTC P1621 ECM RELAY .......................................1538
ECM Terminals and Reference valve ..................1538
On Board Diagnosis Logic ..................................1538
DTC Confirmation Procedure ..............................1538
Wiring Diagram ...................................................1539
Diagnostic Procedure ..........................................1540
Component Inspection ........................................1541DTC P1660 BATTERY VOLTAGE .........................1542
On Board Diagnosis Logic ...................................1542
DTC Confirmation Procedure ..............................1542
Diagnostic Procedure ..........................................1542
GLOW CONTROL SYSTEM ..................................1544
Description ...........................................................1544
ECM Terminals and Reference Value ..................1544
Wiring Diagram ....................................................1545
Diagnostic Procedure ..........................................1546
Component Inspection .........................................1550
Removal and Installation .....................................1550
EGR VOLUME CONTROL SYSTEM .....................1551
Description ...........................................................1551
CONSULT-II Reference Value in Data Monitor Mode
1551
ECM Terminals and Reference Value ..................1552
Wiring Diagram ....................................................1553
Diagnostic Procedure ..........................................1554
Component Inspection .........................................1556
Removal and Installation .....................................1557
BRAKE SWITCH ....................................................1558
Description ...........................................................1558
ECM Terminals and Reference Value ..................1558
Wiring Diagram ....................................................1559
Diagnostic Procedure ..........................................1560
Component Inspection .........................................1561
PARK/NEUTRAL POSITION (PNP) SWITCH .......1562
Description ...........................................................1562
CONSULT-II Reference Value in Data Monitor Mode
1562
ECM Terminals and Reference Value ..................1562
Wiring Diagram ....................................................1563
Diagnostic Procedure ..........................................1564
START SIGNAL .....................................................1566
Wiring Diagram ....................................................1566
Diagnostic Procedure ..........................................1567
POWER STEERING OIL PRESSURE SWITCH ....1568
Component Description .......................................1568
CONSULT-II Reference Value in Data Monitor Mode
1568
ECM Terminals and Reference Value ..................1568
Wiring Diagram ....................................................1569
Diagnostic Procedure ..........................................1570
Component Inspection .........................................1571
Removal and Installation .....................................1571
AIR CONDITIONER CONTROL ............................1572
Wiring Diagram ....................................................1572
MI & DATA LINK CONNECTORS ..........................1573
Wiring Diagram ....................................................1573
SERVICE DATA AND SPECIFICATIONS (SDS) ...1574
General Specifications ......................................... 1574
Mass Air Flow Sensor ..........................................1574
Engine Coolant Temperature Sensor ..................1574
Common Rail Fuel Pressure Sensor ...................1574
Crankshaft Position Sensor (TDC) ......................1574
Camshaft Position Sensor ...................................1574
Glow Plug ............................................................1574
EGR Volume Control Valve .................................1574
![NISSAN X-TRAIL 2001 Service Repair Manual PREPARATION
EC-29
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PREPARATIONPFP:00002
Special Service ToolsEBS00M07
The actual shapes of Kent-Moore tools may differ from those of special service tool NISSAN X-TRAIL 2001 Service Repair Manual PREPARATION
EC-29
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EC
PREPARATIONPFP:00002
Special Service ToolsEBS00M07
The actual shapes of Kent-Moore tools may differ from those of special service tool](/manual-img/5/57405/w960_57405-378.png)
PREPARATION
EC-29
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PREPARATIONPFP:00002
Special Service ToolsEBS00M07
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolsEBS00M08
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 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
![NISSAN X-TRAIL 2001 Service Repair Manual ENGINE CONTROL SYSTEM
EC-33
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EC
System ChartEBS00M0B
*1: This sensor is not used to control the engine system under normal conditions.
*2: These signals are NISSAN X-TRAIL 2001 Service Repair Manual ENGINE CONTROL SYSTEM
EC-33
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System ChartEBS00M0B
*1: This sensor is not used to control the engine system under normal conditions.
*2: These signals are](/manual-img/5/57405/w960_57405-382.png)
ENGINE CONTROL SYSTEM
EC-33
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System ChartEBS00M0B
*1: This sensor is not used to control the engine system under normal conditions.
*2: These signals are sent to the ECM through CAN communication line.
Multiport Fuel Injection (MFI) SystemEBS00M0C
INPUT/OUTPUT SIGNAL CHART
*1: Under normal conditions, this sensor is not for engine control operation.
SYSTEM DESCRIPTION
The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined
Input (Sensor) ECM Function Output (Actuator)
●Camshaft position sensor (PHASE)
●Crankshaft position sensor (POS)
●Mass air flow sensor
●Engine coolant temperature sensor
●Heated oxygen sensor 1
●Throttle position sensor
●Accelerator pedal position sensor
●Park/neutral position (PNP) switch
●Intake air temperature sensor
●Power steering pressure sensor
●Ignition switch
●Battery voltage
●Knock sensor
●Refrigerant pressure sensor
●Heated oxygen sensor 2 *1
●TCM (Transmission control module) *2
●Wheel sensor
●Air conditioner switch
●Electrical loadFuel injection & mixture ratio control Fuel injectors
Electronic ignition system Power transistors
Fuel pump control Fuel pump relay
On board diagnostic system MI (On the instrument panel)
Heated oxygen sensor 1 heater control Heated oxygen sensor 1 heater
Heated oxygen sensor 2 heater control Heated oxygen sensor 2 heater
Power valve control VIAS control solenoid valve
EVAP canister purge flow controlEVAP canister purge volume control
solenoid valve
Air conditioning cut control Air conditioner relay
Cooling fan control Cooling fan relays
Sensor Input Signal to ECMECM func-
tionActuator
Crankshaft position sensor (POS)
Engine speed
Piston position
Fuel injec-
tion & mix-
ture ratio
controlFuel injectors Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Heated oxygen sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch Gear position
Ignition switch Start signal
Knock sensor Engine knocking condition
Battery Battery voltage
Power steering pressure sensor Power steering operation
Heated oxygen sensor 2 *
1Density of oxygen in exhaust gas
Wheel sensor Vehicle speed
Air conditioner switch Air conditioner operation
![NISSAN X-TRAIL 2001 Service Repair Manual EC-36
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ENGINE CONTROL SYSTEM
SYSTEM DESCRIPTION
The ignition timing is controlled by the ECM to maintain the best air-
fuel ratio for every running condition of the engine. NISSAN X-TRAIL 2001 Service Repair Manual EC-36
[QR25(WITH EURO-OBD)]
ENGINE CONTROL SYSTEM
SYSTEM DESCRIPTION
The ignition timing is controlled by the ECM to maintain the best air-
fuel ratio for every running condition of the engine.](/manual-img/5/57405/w960_57405-385.png)
EC-36
[QR25(WITH EURO-OBD)]
ENGINE CONTROL SYSTEM
SYSTEM DESCRIPTION
The ignition timing is controlled by the ECM to maintain the best air-
fuel ratio for every running condition of the engine. The ignition tim-
ing data is stored in the ECM. This data forms the map shown.
The ECM receives information such as the injection pulse width and
camshaft position sensor signal. Computing this information, ignition
signals are transmitted to the power transistor.
e.g., N: 1,800 rpm, Tp: 1.50 msec
A°BTDC
During the following conditions, the ignition timing is revised by the
ECM according to the other data stored in the ECM.
●At starting
●During warm-up
●At idle
●At low battery voltage
●During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not
operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.
The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.
Air Conditioning Cut ControlEBS00M0E
INPUT/OUTPUT SIGNAL CHART
SYSTEM DESCRIPTION
This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned off.
●When the accelerator pedal is fully depressed.
●When cranking the engine.
●At high engine speeds.
●When the engine coolant temperature becomes excessively high.
●When operating power steering during low engine speed or low vehicle speed.
●When engine speed is excessively low.
●When refrigerant pressure is excessively low or high.
SEF742M
Sensor Input Signal to ECM ECM function Actuator
Air conditioner switch Air conditioner “ON” signal
Air conditioner
cut controlAir conditioner relay Throttle position sensor Throttle valve opening angle
Crankshaft position sensor (POS) Engine speed
Engine coolant temperature sensor Engine coolant temperature
Ignition switch Start signal
Refrigerant pressure sensor Refrigerant pressure
Power steering pressure sensor Power steering operation
Wheel sensor Vehicle speed
![NISSAN X-TRAIL 2001 Service Repair Manual EC-42
[QR25(WITH EURO-OBD)]
BASIC SERVICE PROCEDURE
It is useful to perform E C - 111, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE" .
5.If any of the following conditions occur after the NISSAN X-TRAIL 2001 Service Repair Manual EC-42
[QR25(WITH EURO-OBD)]
BASIC SERVICE PROCEDURE
It is useful to perform E C - 111, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE" .
5.If any of the following conditions occur after the](/manual-img/5/57405/w960_57405-391.png)
EC-42
[QR25(WITH EURO-OBD)]
BASIC SERVICE PROCEDURE
It is useful to perform E C - 111, "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 CheckEBS00M0L
FUEL PRESSURE RELEASE
Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.
NOTE:
Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel pres-
sure cannot be completely released because QR engine models do not have fuel return system.
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
CAUTION:
●The fuel hose connection method used when taking fuel pressure check must not be used for
other purposes.
●Take care for not to scratch and not to put debris around connection area when servicing, so that
the quick connector keeps sealability with O-rings inside.
1. Release fuel pressure to zero. Refer to EC-42, "
FUEL PRESSURE RELEASE" .
2. Prepare fuel hose for fuel pressure check, and connect fuel pressure gauge.
●Use suitable fuel hose for fuel pressure check (genuine NISSAN fuel hose without quick connector).
●To avoid unnecessary force or tension to hose, use moderately long fuel hose for fuel pressure check.
●Do not use the fuel hose for checking fuel pressure with damage or cracks on it.
●Use Pressure Gauge to check fuel pressure.
3. Remove fuel hose. Refer to EM-16, "
INTAKE MANIFOLD" .
●Do not twist or kink fuel hose because it is plastic hose.
●Do not remove fuel hose from quick connector.
●Keep the original fuel hose to be free from intrusion of dust or foreign substances with a suitable cover.
SEF214Y
PBIB0508E
![NISSAN X-TRAIL 2001 Service Repair Manual BASIC SERVICE PROCEDURE
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4. Install the fuel pressure gauge as shown in the figure.
●Wipe off oil or dirt from hose insertion part using clot NISSAN X-TRAIL 2001 Service Repair Manual BASIC SERVICE PROCEDURE
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4. Install the fuel pressure gauge as shown in the figure.
●Wipe off oil or dirt from hose insertion part using clot](/manual-img/5/57405/w960_57405-392.png)
BASIC SERVICE PROCEDURE
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4. Install the fuel pressure gauge as shown in the figure.
●Wipe off oil or dirt from hose insertion part using cloth moist-
ened with gasoline.
●Apply proper amount of gasoline between top of the fuel tube
and No.1 spool.
●Insert fuel hose for fuel pressure check until it touches the
No.1 spool on fuel tube.
●Use NISSAN genuine hose clamp (part number: 16439
N4710 or 16439 40U00).
●When reconnecting fuel line, always use new clamps.
●When reconnecting fuel hose, check the original fuel hose for
damage and abnormality.
●Use a torque driver to tighten clamps.
●Install hose clamp to the position within 1 - 2 mm (0.04 - 0.08
in).
●Make sure that clamp screw does not contact adjacent parts.
5. After connecting fuel hose for fuel pressure check, pull the hose
with a force of approximately 98 N (10 kg, 22 lb) to confirm fuel
tube does not come off.
6. Turn ignition switch “ON”, and check for fuel leakage.
7. Start engine and check for fuel leakage.
8. Read the indication of fuel pressure gauge.
●Do not perform fuel pressure check with system operating. Fuel pressure gauge may indicate false
readings.
●During fuel pressure check, confirm for fuel leakage from fuel connection every 3 minutes.
9. If result is unsatisfactory, go to next step.
10. Check the following.
●Fuel hoses and fuel tubes for clogging
●Fuel filter for clogging
●Fuel pump
●Fuel pressure regulator for clogging
If OK, replace fuel pressure regulator.
If NG, repair or replace.Tightening torque: 1 - 1.5 N·m (0.1 - 0.15 kg-m,
9 - 13 in-lb)
At idling:
Approximately 350 kPa (3.5 bar, 3.57 kg/cm
2 , 51 psi)
PBIB0669E
PBIB0670E