2003 NISSAN X-TRAIL fuel pressure

EM-68
[QR]
CYLINDER HEAD

–If the compression pressure remains at low level despite the addition of engine oil, valves may be mal-
functioning. Check valves for damage. Replace valve or valve seat accordingly.

If two adjacent cylinders have respectively low compression pressure and their compression remains
low even after the addition of engine oil, gaskets are leaking. In such a case, replace cylinder head gas-
kets.
7. After inspection is completed, install removed parts.
8. Start engine, and confirm that engine runs smoothly.
9. Perform trouble diagnosis. If DTC appears, erase it. Refer to EC-73, "
TROUBLE DIAGNOSIS" (WITH
EURO-OBD) or EC-520, "
TROUBLE DIAGNOSIS" (WITHOUT EURO-OBD).
Removal and InstallationEBS00KNQ
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. Drain engine coolant and engine oil. Refer to CO-9, "
Changing Engine Coolant" and LU-8, "Changing
Engine Oil" .
3. Remove the following components and related parts.

Exhaust manifold and three way catalyst assembly; Refer to EM-23, "EXHAUST MANIFOLD AND
THREE WAY CATALYST" .

Intake manifold and fuel tube assembly (QR20DE); Refer to EM-17, "Removal and Installation
(QR20DE)" .

Intake manifold collector, intake manifold and fuel tube assembly (QR25DE); Refer to EM-20, "Removal
and Installation (QR25DE)" .

Water control valve and housing (water outlet); Refer to CO-22, "THERMOSTAT AND WATER CON-
TROL VALVE" .
NOTE:
Can be removed and installed even when assembled with cylinder head.
4. Remove front cover and timing chain. Refer to EM-44, "
TIMING CHAIN" .
5. Remove camshafts. Refer to EM-53, "
CAMSHAFT" .
6. Securely support bottom of cylinder block with a jack or equivalent tool, and release the hoist that was
supporting it.
1. Cylinder head assembly 2. Cylinder head gasket 3. Cylinder head bolt
PBIC2185E

ENGINE ASSEMBLY
EM-79
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Preparation
1. Remove hood assembly. Refer to BL-12, "HOOD" .
2. Release fuel pressure. Refer to EC-48, "
FUEL PRESSURE RELEASE" (WITH EURO-OBD) or EC-510,
"FUEL PRESSURE RELEASE" (WITHOUT EURO-OBD).
3. Disconnect both battery terminals. Refer to SC-3, "
BATTERY" .
4. Drain engine coolant from radiator. Refer to CO-9, "
DRAINING ENGINE COOLANT" .
5. Remove the following parts.

LH and RH undercovers

Front road wheels and tyres

Battery; Refer to SC-3, "BATTERY" .

Drive belt; Refer to EM-13, "DRIVE BELTS" .

Air duct and air cleaner case assembly; Refer to EM-15, "AIR CLEANER AND AIR DUCT" .

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

Radiator and radiator cooling fan assembly; Refer to CO-12, "RADIATOR" .
6. Disconnect engine room harness from the engine side and set it aside for easier work.
7. Disconnect all vacuum hoses and air hoses connected to vehicle side at engine side.
Engine Room LH
1. Disconnect fuel feed hose, and plug it to prevent fuel from draining. Refer to EM-32, "FUEL INJECTOR
AND FUEL TUBE"
2. Disconnect heater hose, and install plug it to prevent engine coolant from draining.
3. Disconnect control cable from transaxle (A/T models). Refer to AT- 4 0 4 , "
ON-VEHICLE SERVICE" .
4. Disconnect clutch operating cylinder from transaxle, and move it aside (M/T models). Refer to CL-10,
"OPERATING CYLINDER" .
5. Disconnect shift and select cable from transaxle (M/T models). Refer to MT-14, "
CONTROL LINKAGE" .
Engine Room RH
1. Remove engine coolant reservoir tank. Refer to CO-12, "RADIATOR" .
2. Remove A/C compressor with piping connected from engine. Temporarily secure it on vehicle side with a
rope to avoid putting load on it. Refer to ATC-144, "
Removal and Installation of Compressor" .
Vehicle Underbody
1. Remove exhaust front tube. Refer to EX-2, "EXHAUST SYSTEM" .
2. Remove propeller shaft. Refer to PR-3, "
REAR PROPELLER SHAFT" .
3. Remove steering lower joint from steering gear. Refer to PS-10, "
STEERING COLUMN" .
4. Disconnect power steering fluid piping at a point between vehicle and engine. Refer to PS-34, "
HYDRAU-
LIC LINE" .
5. Remove rear plate cover from oil pan (upper). Then remove bolts fixing drive plate to torque converter
(A/T models). Refer to EM-25, "
OIL PAN AND OIL STRAINER" and AT- 4 1 3 , "REMOVAL AND INSTALLA-
TION" .
6. Remove transaxle joint bolts which pierce at oil pan (upper) lower rear side. Refer to MT-17, "
TRAN-
SAXLE ASSEMBLY" (M/T models) or AT- 4 1 3 , "REMOVAL AND INSTALLATION" (A/T models).
7. Remove front wheel sensor (LH and RH) for ABS from steering knuckle. Refer to BRC-45, "
WHEEL SEN-
SORS" (ABS) or BRC-116, "WHEEL SENSORS" (ESP/TCS/ABS).
8. Remove brake caliper assembly with piping connected from steering knuckle. Temporarily secure it on
vehicle side with a rope to avoid load on it. Refer to BR-27, "
FRONT DISC BRAKE" .
9. Remove lower ends of left and right strut from steering knuckle. Refer to FSU-5, "
FRONT SUSPENSION
ASSEMBLY" .
Removal
1. Install engine slingers into front left of cylinder head and rear right of cylinder head.

ENGINE ASSEMBLY
EM-81
[QR]
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9. Remove power steering oil pump with piping connected from engine. Move it aside on front suspension
member. Refer to PS-34, "
HYDRAULIC LINE" .
10. Remove front engine mounting and rear engine mounting through-bolts to remove front suspension mem-
ber and center member.
11. Remove starter motor. Refer to SC-21, "
STARTING SYSTEM" .
12. Separate engine and transaxle. Refer to MT-17, "
TRANSAXLE ASSEMBLY" (M/T models) or AT- 4 1 3 ,
"REMOVAL AND INSTALLATION" (A/T models).
INSTALLATION
Note the following, and install in the reverse order of removal.

Do not allow engine oil to get on mounting insulator. Be careful not to damage mounting insulator.

When installation directions are specified, install parts according to the direction marks on them referring
to figure of components. Refer to EM-78, "
Removal and Installation" .

Make sure that each mounting insulator is seated properly, and tighten mounting bolts and nuts.
INSPECTION AFTER INSTALLATION

Before starting engine, check the levels of engine coolant, engine oil and working fluid. If less than
required quantity, fill to the specified level.

Use procedure below to make sure there is no fuel leakage.
–Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, make sure there
are no fuel leaks at connection points.
–Start engine. With engine speed increased, check again if there are no fuel leaks at connection points.

Run engine to check for unusual noise and vibration.

Warm up engine thoroughly to make sure there is no leakage of engine coolant, engine oil, working fluid,
fuel and exhaust gas.

Bleed air from passages in pipes and tubes of applicable lines, such as in cooling system.

After cooling down engine, again check amounts of engine coolant, engine oil and working fluid. Refill to
specified level, if necessary.
Summary of the inspection items:
Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Working fluid Level Leakage Level
Fuel — Leakage —
Exhaust gas — Leakage —

EM-196
[YD22DDTi]
CYLINDER HEAD

CYLINDER HEADPFP:11041
On-Vehicle ServiceEBS00LRV
CHECKING COMPRESSION PRESSURE
1. Warm up engine thoroughly. Then, stop it.
2. Using CONSULT-II, make sure no error codes are indicated for self-diagnosis items. Refer to EC-905,
"Basic Inspection" (WITH EURO-ODB) or EC-1231, "Basic Inspection" (WITHOUT EURO-ODB).

Do not disconnect CONSULT-II until the end of this operation; it will be used to check engine rpm and
for error detection at the end of this operation.
3. Disconnect the negative battery terminal.
4. Remove charge air cooler. Refer to EM-135, "
Removal and Installation"
5. To prevent fuel from being injected during inspection, remove
fuel pump fuse [ENG CONT 2 (20A)] from fuse box on the left
side of engine room.

Among marks on fuse box, [ENG CONT 2 (20A)] is for fuel
pump fuse.
6. Remove glow plugs from all the cylinders. Refer to EM-152,
"Removal and Installation" .
CAUTION:

Before removal, clean the surrounding area to prevent
entry of any foreign materials into engine.

Carefully remove glow plugs to prevent any damage or
breakage.

Handle with care to avoid applying any shock to glow plugs.
7. Install compression gauge adapter (special service tool) to
installation holes of glow plugs and connect compression gauge
for diesel engine.
8. Connect battery negative terminal.
9. With accelerator pedal fully depressed, turn ignition switch to
“START” for cranking. When the gauge pointer stabilizes, read
the compression pressure and engine rpm. Perform these steps
to check each cylinder.

Always use a fully-charged battery to obtain specified engine
speed.
Compression pressure
Unit: kPa (bar, kg/cm2 , psi)/rpm

When engine rpm is out of the specified range, check the specific gravity of battery liquid. Measure
again under corrected conditions.

If engine rpm exceeds the limit, check valve clearance and combustion chamber components (valves,
valve seats, cylinder head gaskets, piston rings, pistons, cylinder bores, cylinder block upper and lower
surfaces) and measure again.

If compression pressure is low in some cylinders, apply engine oil from glow plug installation hole. Then
check pressure again.
–If compression pressure becomes normal after applying engine oil, piston ring may be worn or dam-
aged. Check piston ring for malfunction. If any, replace piston ring.
–If compression pressure is still low after applying engine oil, valve may be malfunctioning. Check valve
for malfunction. If contact malfunction is found, replace valve or valve seat.

If compression pressure in adjacent two cylinders is low after applying engine oil, pressure may be
leaking from gasket. In this case, replace cylinder head gasket.
PBIC0680E
: 18 - 22 N·m (1.8 - 2.2 kg-m, 13 - 16 ft-lb)
SEM112G
Standard Minimum Difference limit between cylinders
2,991 (29.9, 30.5, 434)/200 2,452 (24.5, 25.0, 356)/200 490 (4.9, 5.0, 71)/200

CYLINDER BLOCK
EM-213
[YD22DDTi]
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DISASSEMBLY
1. Remove engine, transaxle and transfer assembly from the vehicle, then separate engine and transaxle
and transfer assembly. Refer to EM-208, "
ENGINE ASSEMBLY" .
2. Remove clutch cover and disk. Refer to CL-14, "
CLUTCH DISC,
CLUTCH COVER AND FLYWHEEL" .
3. If they need to be replaced, replace pilot bush.

Using the pilot bushing puller (special service tool), remove
the pilot bush from rear end of crankshaft.
4. Install engine to engine stand as follows.
a. Remove flywheel.
b. Secure ring gear with the ring gear stopper (special service
tool), then loosen mounting bolts with TORX socket (size: T55,
Commercial Service Tools) and remove them. As an alternative
method hold crankshaft pulley with the pulley holder (special
service tool: KV10109300) to remove flywheel.
CAUTION:

Do not disassemble flywheel.

Do not place flywheel with signal plate facing down.

When handling signal plate, take care not to damage or
scratch it.

Handle signal plate in a manner that prevents it from
becoming magnetized.
c. Install the engine sub-attachment (special service tool) to the
rear side of cylinder block.

Align knock pins on cylinder block with pin holes on attach-
ment to install.
NOTE:
Installation bolts are part of engine sub-attachment.
d. Install the engine stand shaft (special service tool).
NOTE:
Use commercially available M12 (0.47 in) mounting bolts and
nuts (4 sets) with strength grade of 9T (minimum).
1. Rear oil seal retainer 2. Cylinder block 3. Oil pressure switch
4. Fuel pump bracket 5. Oil level gauge guide 6. Top ring
7. Second ring 8. Oil ring 9. Oil jet
10. Piston pin 11. Snap ring 12. Piston
13. Main bearing upper 14. Thrust bearing 15. Connecting rod
16. Key 17. Connecting rod bearing 18. Connecting rod cap
19. Connecting rod nut 20. Main bearing lower 21. Crankshaft
22. Main bearing cap bolt 23. Main bearing cap 24. Pilot bush
25. Flywheel 26. Copper washer 27. Oil jet relief valve
28. Drain plug 29. Rear oil seal
SEM500G
PBIC2406E
JEM192G

EM-246
[YD22DDTi]
SERVICE DATA AND SPECIFICATIONS (SDS)

Spill tube Nozzle side 18.7 (1.9, 14)
Cylinder head side 18.7 (1.9, 14)
Fuel rail57.5 (5.9, 42)
Fuel pump31.4 (3.2, 23)
Fuel pump sprocket39 (4.0, 29)
*1 Camshaft bracket 1) 2 (0.2, 1)
2) 6 (0.6, 4)
3) 12 - 13 (1.2 - 1.4, 9 - 10)
Front chain case
7.9 (0.8, 70)*
2
Chain tensioner
9.6 (0.98, 85)*2
Tension guide23.5 (2.4, 18)
Slack guide23.5 (2.4, 18)
Camshaft sprocket 143 (15, 105)
Oil pump housing12.5 (1.3, 9)
Power steering oil pump 53.5 (5.5, 39)
Rear chain case12.5 (1.3, 9)
Engine coolant temperature sensor 13.5 (1.4, 10)
*1 Cylinder head 1) 35 - 44 (3.5 - 4.5, 26 - 32)
2) 180 degrees to 185 degrees
3) 0 (0, 0)
4) 35 - 44 (3.5 - 4.5, 26 - 32)
5) 90 degrees to 95 degrees (angle
tightening)
6) 90 degrees to 95 degrees (angle
tightening)
Glow plug20.5 (2.1, 15)
*1 Flywheel103 - 112 (10.5 - 11.5, 76 - 83)
Oil pressure switch13 - 17 (1.25 - 1.75, 9 - 12)
Oil jet6.0 - 10.8 (0.62 - 1.1, 54 - 95)
Oil jet relief valve40 - 58 (4.0 - 6.0, 29 - 43)
Rear oil seal retainer12 - 13 (1.2 - 1.4, 9 - 10)

EC-1
ENGINE CONTROL SYSTEM
B ENGINE
CONTENTS
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SECTION EC
A
EC

ENGINE CONTROL SYSTEM
QR (WITH EURO-OBD)
INDEX FOR DTC ...................................................... 19
Alphabetical Index .................................................. 19
DTC No. Index ....................................................... 21
PRECAUTIONS ........................................................ 24
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................ 24
On Board Diagnostic (OBD) System of Engine and
A/T .......................................................................... 24
Precaution .............................................................. 24
Wiring Diagrams and Trouble Diagnosis ................ 27
PREPARATION ......................................................... 28
Special Service Tools ............................................. 28
Commercial Service Tools ...................................... 29
ENGINE CONTROL SYSTEM .................................. 30
System Diagram ..................................................... 30
Vacuum Hose Drawing ........................................... 32
System Chart ......................................................... 34
Multiport Fuel Injection (MFI) System .................... 34
Electronic Ignition (EI) System ............................... 37
Air Conditioning Cut Control ................................... 37
Fuel Cut Control (at No Load and High Engine
Speed) .................................................................... 38
CAN Communication Unit ...................................... 38
BASIC SERVICE PROCEDURE .............................. 44
Idle Speed and Ignition Timing Check .................... 44
Accelerator Pedal Released Position Learning ...... 45
Throttle Valve Closed Position Learning ................ 46
Idle Air Volume Learning ........................................ 46
Fuel Pressure Check .............................................. 48
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 51
Introduction ............................................................ 51
Two Trip Detection Logic ........................................ 51
Emission-related Diagnostic Information ................ 52
NATS (Nissan Anti-theft System) ........................... 64
Malfunction Indicator (MI) ....................................... 64
OBD System Operation Chart ................................ 67
TROUBLE DIAGNOSIS ............................................ 73
Trouble Diagnosis Introduction ............................... 73DTC Inspection Priority Chart ................................. 76
Fail-safe Chart ........................................................ 77
Basic Inspection ..................................................... 79
Symptom Matrix Chart ............................................ 84
Engine Control Component Parts Location ............ 88
Circuit Diagram ....................................................... 93
ECM Harness Connector Terminal Layout ............. 95
ECM Terminals and Reference Value ..................... 95
CONSULT-II Function ...........................................102
Generic Scan Tool (GST) Function .......................112
CONSULT-II Reference Value in Data Monitor Mode
.114
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................116
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .119
Description ............................................................119
Testing Condition ..................................................119
Inspection Procedure ............................................119
Diagnostic Procedure ...........................................120
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................123
Description ............................................................123
Diagnostic Procedure ...........................................123
POWER SUPPLY AND GROUND CIRCUIT ...........124
Wiring Diagram .....................................................124
Diagnostic Procedure ...........................................125
Component Inspection ..........................................131
Ground Inspection ................................................131
DTC U1000, U1001 CAN COMMUNICATION LINE .132
Description ............................................................132
On Board Diagnosis Logic ....................................132
DTC Confirmation Procedure ...............................132
Wiring Diagram .....................................................133
Diagnostic Procedure ...........................................134
DTC P0011 IVT CONTROL .....................................135
Description ............................................................135
CONSULT-II Reference Value in Data Monitor Mode
.135
On Board Diagnosis Logic ....................................136

EC-5
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Diagnostic Procedure ........................................... 382
Component Inspection ......................................... 384
DTC P2122, P2123 APP SENSOR ........................ 386
Component Description ........................................ 386
CONSULT-II Reference Value in Data Monitor Mode
. 386
On Board Diagnosis Logic ................................... 386
DTC Confirmation Procedure ............................... 387
Wiring Diagram .................................................... 388
Diagnostic Procedure ........................................... 390
Component Inspection ......................................... 392
Removal and Installation ...................................... 392
DTC P2127, P2128 APP SENSOR ........................ 393
Component Description ........................................ 393
CONSULT-II Reference Value in Data Monitor Mode
. 393
On Board Diagnosis Logic ................................... 393
DTC Confirmation Procedure ............................... 393
Wiring Diagram .................................................... 395
Diagnostic Procedure ........................................... 397
Component Inspection ......................................... 400
Removal and Installation ...................................... 400
DTC P2135 TP SENSOR ........................................ 401
Component Description ........................................ 401
CONSULT-II Reference Value in Data Monitor Mode
. 401
On Board Diagnosis Logic ................................... 401
DTC Confirmation Procedure ............................... 401
Wiring Diagram .................................................... 403
Diagnostic Procedure ........................................... 405
Component Inspection ......................................... 408
Removal and Installation ...................................... 408
DTC P2138 APP SENSOR ..................................... 409
Component Description ........................................ 409
CONSULT-II Reference Value in Data Monitor Mode
. 409
On Board Diagnosis Logic ................................... 409
DTC Confirmation Procedure ............................... 410
Wiring Diagram ..................................................... 411
Diagnostic Procedure ........................................... 413
Component Inspection ......................................... 416
Removal and Installation ...................................... 416
IGNITION SIGNAL .................................................. 417
Component Description ........................................ 417
Wiring Diagram .................................................... 418
Diagnostic Procedure ........................................... 421
Component Inspection ......................................... 426
Removal and Installation ...................................... 427
INJECTOR CIRCUIT ............................................... 428
Component Description ........................................ 428
CONSULT-II Reference Value in Data Monitor Mode
. 428
Wiring Diagram .................................................... 429
Diagnostic Procedure ........................................... 430
Component Inspection ......................................... 433
Removal and Installation ...................................... 433
VIAS ........................................................................ 434
Description ........................................................... 434
CONSULT-II Reference Value in Data Monitor Mode .435
Wiring Diagram .....................................................436
Diagnostic Procedure ...........................................438
Component Inspection ..........................................441
Removal and Installation ......................................442
FUEL PUMP CIRCUIT ............................................443
Description ............................................................443
CONSULT-II Reference Value in Data Monitor Mode
.443
Wiring Diagram .....................................................444
Diagnostic Procedure ...........................................447
Component Inspection ..........................................450
Removal and Installation ......................................450
REFRIGERANT PRESSURE SENSOR ..................451
Component Description ........................................451
Wiring Diagram .....................................................452
Diagnostic Procedure ...........................................453
Removal and Installation ......................................455
ELECTRICAL LOAD SIGNAL ................................456
CONSULT-II Reference Value in Data Monitor Mode
.456
Wiring Diagram .....................................................457
Diagnostic Procedure ...........................................464
MI & DATA LINK CONNECTORS ...........................469
Wiring Diagram .....................................................469
EVAPORATIVE EMISSION SYSTEM .....................473
Description ............................................................473
Component Inspection ..........................................476
POSITIVE CRANKCASE VENTILATION ...............478
Description ............................................................478
Component Inspection ..........................................478
SERVICE DATA AND SPECIFICATIONS (SDS) ....480
Fuel Pressure .......................................................480
Idle Speed and Ignition Timing .............................480
Calculated Load Value ..........................................480
Mass Air Flow Sensor ...........................................480
Intake Air Temperature Sensor .............................480
Engine Coolant Temperature Sensor ...................480
Heated Oxygen Sensor 1 Heater .........................480
Heated Oxygen sensor 2 Heater ..........................481
Crankshaft Position Sensor (POS) .......................481
Camshaft Position Sensor (PHASE) ....................481
Throttle Control Motor ...........................................481
Injector ..................................................................481
Fuel Pump ............................................................481
QR (WITHOUT EURO-OBD)
INDEX FOR DTC .....................................................482
Alphabetical Index ................................................482
DTC No. Index ......................................................484
PRECAUTIONS ......................................................486
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ...............................................................486
On Board Diagnostic (OBD) System of Engine ....486
Precaution ............................................................486
Wiring Diagrams and Trouble Diagnosis ..............489