2001 NISSAN X-TRAIL engine coolant

ENGINE COOLANT
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8. Repeat steps 5 through 7 two or more times with radiator cap installed until engine coolant level no longer
drops.
9. Check cooling system for leaks with engine running.
10. Warm up engine, and check for sound of engine coolant flow while running engine from idle up to 3,000
rpm with heater temperature controller set at several position between COOL and WARM.
●Sound may be noticeable at heater unit.
11. If sound is heard, bleed air from cooling system by repeating steps 5 through 7 until engine coolant level
no longer drops.
●Clean excess engine coolant from engine.
FLUSHING COOLING SYSTEM
1. Fill radiator with water until water spills from the air relief hole, then close air relief flag. Fill radiator and
reservoir tank with water and reinstall radiator cap.
2. Run engine and warm it up to normal operating temperature.
3. Rev engine two or three times under no-load.
4. Stop engine and wait until it cools down.
5. Drain water.
6. Repeat steps 1 through 5 until clear water begins to drain from radiator.

CO-32
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RADIATOR
RADIATOR
PFP:21400
Removal and InstallationEBS00BB0
WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure
engine coolant escaping from the radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter
turn to allow built-up pressure to escape. Carefully remove the cap by turning it all the way.
REMOVAL
1. Drain engine coolant. Refer to CO-29, "DRAINING ENGINE COOLANT" .
2. Remove undercover.
3. Disconnect radiator upper hose, lower hose, reservoir tank hose and mounting bracket.
4. Remove radiator and radiator fan assembly
CAUTION:
Do not damage or scratch radiator core when removing.
INSTALLATION
●Reinstall any parts removed in reverse order of removal.
●Check for engine coolant leaks. Refer to CO-29, "CHECKING RADIATOR SYSTEM FOR LEAKS" .
PBIC0671E
1. Radiator 2. Bracket 3. Mounting rubber
4. Drain plug 5. Radiator hose (lower) 6. Radiator fan assembly
7. Reservoir tank 8. Radiator hose (upper) 9. Radiator cap

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RADIATOR
●Check radiator cap relief pressure.
●When connecting the radiator cap to the tester, apply engine
coolant to the cap seal part.
●Replace the radiator cap if there is an unusualness in the nega-
tive-pressure valve, or if the open-valve pressure is outside of
the standard values.
Checking RadiatorEBS00BRH
Check radiator for mud or clogging. If necessary, clean radiator as follows.
●Be careful not to bend or damage the radiator fins.
●When radiator is cleaned without removal, remove all surrounding parts such as cooling fan, radiator
shroud and horns. Then tape the harness and connectors to prevent water from entering.
1. Apply water by hose to the back side of the radiator core vertically downwards.
2. Apply water again to all radiator core surface once per minute.
3. Stop washing if any stains no longer flow out from the radiator.
4. Blow air into the back side of radiator core vertically downwards.
●Use compressed air lower than 490 kPa (4.9 bar 5 kg/cm2 , 71psi) and keep distance more than 30
cm(11.8 in).
5. Blow air again into all the radiator core surface once per minute until no water sprays out. Standard : 78 - 98 kPa (0.78 - 0.98 bar, 0.8 - 1.0 kg/
cm
2 , 11 - 14 psi)
Limit : 59 kPa (0.59 bar, 0.6 kg/cm
2 , 9 psi)
SLC135B

WATER PUMP
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WAT E R P U MPPFP:21020
Removal and InstallationEBS00BB4
WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure
engine coolant escaping from the radiator.
REMOVAL
1. Remove the under cover, splash cover (right), and drive belt.
2. Drain engine coolant. Refer to CO-29, "
DRAINING ENGINE COOLANT" .
CAUTION:
Perform when the engine is cold.
3. Support the bottom of the oil pan with a floor jack etc, and remove the right engine mount bracket (front
side of the engine).
4. Remove the water pump pulley.
●Loosen the pulley bolts after fixing the pulley using a screwdriver etc.
5. Remove engine mount bracket.
6. Remove the water pump.
●Engine coolant will leak from the cylinder block, so have a receptacle ready below.
CAUTION:
●Handle the water pump vane so that it does not contact any other parts.
●Water pump cannot be disassembled and should be replaced as a unit.
INSPECTION AFTER REMOVAL
●Visually check that there is no significant dirt or rusting on the
water pump body and vane.
●Check that there is no looseness in the vane shaft, and that it
turns smoothly when rotated by hand.
●If there are any unusualness, replace the water pump assembly.
JLC294B
SBIA0132E

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WATER PUMP
INSTALLATION
●Install in the reverse order of removal
●Install the water pump pulley with the front mark (painted white, used to prevent errors during assembly)
facing the front of the engine. Refer to the figure above.
INSPECTION AFTER INSTALLATION
Check for engine coolant leaks using radiator cap tester. Refer to CO-29, "CHECKING RADIATOR SYSTEM
FOR LEAKS" .

THERMOSTAT AND WATER PIPING
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THERMOSTAT AND WATER PIPINGPFP:21200
Removal and InstallationEBS00BK9
WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure
engine coolant escaping from the radiator.
REMOVAL
1. Remove the engine undercover and splash cover (right and left).
2. Drain engine coolant. Refer to CO-29, "
DRAINING ENGINE COOLANT" .
CAUTION:
Perform when the engine cold.
3. Remove radiator lower hose from water inlet side.
4. Remove water inlet and thermostat.
5. Remove thermostat housing.
SBIA0133E
1. Thermostat 2. Water inlet 3. Thermostat housing
4. Water inlet pipe 5. Heater return pipe 6. Gasket

SERVICE DATA AND SPECIFICATIONS (SDS)
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SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Standard and LimitEBS00CU0
CAPACITY
Unit: (lmp qt)
THERMOSTAT
RADIATOR
Unit: kPa (bar, kg/cm2 , psi)
Tightening TorqueEBS00BKE
Unit: N·m (kg-m, ft-lb)
Unit: N·m (kg-m, in-lb)*
Engine coolant capacity [With reservoir tank (MAX level)] 9.5 (8-3/8)
Reservoir tank0.6 (1/2)
Valve opening temperature 80 - 84°C (176 - 183°F)
Va l v e l i f tMore than 10 mm/ 95°C (0.39 in/203°F)
Valve closing temperature Approximately 77°C (171°F)
Cap relief pressureStandard 78 - 98 (0.78 - 0.98, 0.8 - 1.0, 11 - 14)
Limit 59 (0.59, 0.6, 9)
Leakage test pressure 157 (1.57, 1.6, 23)
Cylinder block drain plug 7.8 - 11.8 (0.8 - 1.2, 69 - 104)*
Air relief plug6.7 - 7.9 (0.68 - 0.81, 59 - 70)*
Radiator mounting bracket
Radiator fan assembly
Radiator fan
Radiator fan motor3.8 - 4.5 (0.39 - 0.45, 34 - 39)*
3.8 - 4.5 (0.39 - 0.45, 34 - 39)*
2.9 - 3.9 (0.30 - 0.40, 26 - 34)*
3.9 - 4.9 (0.40 - 0.50, 35 - 43)*
Water pump
Water pump pulley
Water inlet
Thermostat housing
Water inlet pipe
Hater return pipe23.0 - 30.0 (2.3 - 3.1, 17 - 22)
7.3 - 9.6 (0.74 - 0.98, 65 - 85)*
21.0 - 28.0 (2.1 - 2.9, 16 - 20)
21.0 - 28.0 (2.1 - 2.9, 16 - 20)
21.0 - 28.0 (2.1 - 2.9, 16 - 20)
21.0 - 28.0 (2.1 - 2.9, 16 - 20)

EC-6
DATA LINK CONNECTOR ......................................424
Wiring Diagram .....................................................424
EVAPORATIVE EMISSION SYSTEM .....................425
Description ............................................................425
Component Inspection ..........................................427
POSITIVE CRANKCASE VENTILATION ...............428
Description ............................................................428
Component Inspection ..........................................428
SERVICE DATA AND SPECIFICATIONS (SDS) ....430
Fuel Pressure .......................................................430
Idle Speed and Ignition Timing .............................430
Calculated Load Value ..........................................430
Mass Air Flow Sensor ...........................................430
Intake Air Temperature Sensor .............................430
Engine Coolant Temperature Sensor ...................430
Heated Oxygen Sensor 1 Heater .........................430
Heated Oxygen sensor 2 Heater ..........................430
Crankshaft Position Sensor (POS) .......................430
Camshaft Position Sensor (PHASE) ....................431
Throttle Control Motor ...........................................431
Injector ..................................................................431
Fuel Pump ............................................................431
QR25(WITHOUT EURO-OBD)
INDEX FOR DTC .....................................................432
Alphabetical Index ................................................432
DTC No. Index ......................................................433
PRECAUTIONS .......................................................435
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ...............................................................435
On Board Diagnostic (OBD) System of Engine and
A/T ........................................................................435
Precaution ............................................................435
Wiring Diagrams and Trouble Diagnosis ..............438
PREPARATION .......................................................439
Special Service Tools ...........................................439
Commercial Service Tools ....................................439
ENGINE CONTROL SYSTEM ................................441
System Diagram ...................................................441
Vacuum Hose Drawing .........................................442
System Chart ........................................................443
Multiport Fuel Injection (MFI) System ...................443
Electronic Ignition (EI) System .............................445
Air Conditioning Cut Control .................................446
Fuel Cut Control (at No Load and High Engine
Speed) ..................................................................447
CAN Communication ............................................447
BASIC SERVICE PROCEDURE .............................448
Idle Speed and Ignition Timing Check ..................448
Accelerator Pedal Released Position Learning ....449
Throttle Valve Closed Position Learning ...............449
Idle Air Volume Learning ......................................450
Fuel Pressure Check ............................................452
ON BOARD DIAGNOSTIC (OBD) SYSTEM ..........454
Introduction ...........................................................454
Two Trip Detection Logic ......................................454
Emission-related Diagnostic Information ..............454NATS (Nissan Anti-theft System) ..........................456
Malfunction Indicator (MI) .....................................457
TROUBLE DIAGNOSIS ..........................................460
Trouble Diagnosis Introduction .............................460
DTC Inspection Priority Chart ...............................463
Fail-safe Chart ......................................................464
Basic Inspection ....................................................465
Symptom Matrix Chart ..........................................469
Engine Control Component Parts Location ...........473
Circuit Diagram .....................................................477
ECM Harness Connector Terminal Layout ............479
ECM Terminals and Reference Value ...................479
CONSULT-II Function ...........................................486
CONSULT-II Reference Value in Data Monitor .....496
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................499
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .502
Description ............................................................502
Testing Condition ..................................................502
Inspection Procedure ........................................... .502
Diagnostic Procedure ............................................503
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................506
Description ............................................................506
Diagnostic Procedure ............................................506
POWER SUPPLY CIRCUIT FOR ECM ...................507
Wiring Diagram .....................................................507
ECM Terminals and Reference Value ...................508
Diagnostic Procedure ............................................508
Component Inspection ..........................................512
DTC U1000 CAN COMMUNICATION LINE ............513
Description ............................................................513
On Board Diagnosis Logic ....................................513
DTC Confirmation Procedure ................................513
Wiring Diagram .....................................................514
Diagnostic Procedure ............................................515
DTC P0102, P0103 MAF SENSOR .........................516
Component Description ........................................516
CONSULT-II Reference Value in Data Monitor Mode
.516
ECM Terminals and Reference Value ...................516
On Board Diagnosis Logic ....................................516
DTC Confirmation Procedure ................................517
Wiring Diagram .....................................................519
Diagnostic Procedure ............................................520
Component Inspection ..........................................522
Removal and Installation .......................................522
DTC P0117, P0118 ECT SENSOR ..........................523
Component Description ........................................523
On Board Diagnosis Logic ....................................523
DTC Confirmation Procedure ................................524
Wiring Diagram .....................................................525
Diagnostic Procedure ............................................526
Component Inspection ..........................................527
Removal and Installation .......................................527
DTC P0122, P0123 TP SENSOR ............................528
Component Description ........................................528
CONSULT-II Reference Value in Data Monitor Mode
.528