2005 NISSAN X-TRAIL Power Steering System

EM-214
[YD22DDTi]
CYLINDER HEAD

c. Tighten 180 degrees in numerical order as shown (angle tight-
ening).
d. Loosen completely in reverse order of that shown in the figure.
e. Tighten all bolts in numerical order as shown.
f. Tighten 90 degrees in numerical order as shown (angle tighten-
ing).
g. Tighten another 90 degrees in numerical order as shown (angle
tightening).
CAUTION:

When the angle wrench (special service tool) is not used, paint an alignment mark on the head
of cylinder head bolt and cylinder head surface before tightening. Check the angle with a pro-
tractor.
4. Install glow plug.
CAUTION:

To avoid damage, glow plugs should be removed only when required.

Handle with care to avoid applying shock. When dropped from approx. 10 cm (3.94 in) or higher,
always replace with a new one.

Before installing, remove carbon depositing on mounting hole of glow plug with a reamer.
5. Install in the reverse order of removal.
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The following are procedures for checking fluids leak, lubricates leak and exhaust gases leak.

Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to MA-17, "
RECOMMENDED FLUIDS AND LUBRICANTS" .

Before starting engine, bleed air from fuel piping. Refer to FL-18, "Air Bleeding" .

Run engine to check for unusual noise and vibration.

Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gases, or any oil/fluids
including engine oil and engine coolant.

Bleed air from lines and hoses of applicable lines, such as in cooling system.

After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.
Summary of the inspection items:
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.
: 0 N·m (0 kg-m, 0 ft-lb)
:39.2 N·m (4.0 kg-m, 29 ft-lb)
JEM166G
Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gases — Leakage —

ENGINE ASSEMBLY
EM-223
[YD22DDTi]
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REMOVAL
Description of work
Remove engine and transaxle assembly from vehicle downward. Separate engine and transaxle.
Preparation
1. Remove hood assembly. Refer to BL-12, "HOOD" .
2. Drain engine coolant from radiator drain plug. Refer to CO-32, "
DRAINING ENGINE COOLANT" .
3. Remove the following parts.

LH and RH engine undercover

LH and RH front wheels

Battery; Refer to SC-4, "BATTERY" .

Drive belts; Refer to EM-140, "DRIVE BELTS" .

Air duct and air cleaner case assembly; Refer to EM-142, "AIR CLEANER AND AIR DUCT" .

Alternator; Refer to SC-17, "Removal and Installation" .

Radiator assembly; Refer to CO-35, "RADIATOR" .

Charge air cooler; Refer to EM-144, "CHARGE AIR COOLER" .
4. Disconnect engine room harness from the engine side and set it aside for easier work.
5. Disconnect all vacuum hoses and air hoses connected to vehicle side at engine side.
Engine room LH
1. Disconnect fuel hose, and plug it to prevent fuel from draining. Refer to EM-146, "INTAKE MANIFOLD" .
2. Disconnect heater hose, and install plug it to prevent engine coolant from draining. Refer to EM-146,
"INTAKE MANIFOLD" .
3. Remove clutch operating cylinder from transaxle, and move it aside. Refer to MT-19, "
TRANSAXLE
ASSEMBLY" and CL-12, "OPERATING CYLINDER" .
4. Disconnect shift cable from transaxle. Refer to MT-16, "
CONTROL LINKAGE" .
Engine room RH
1. Remove engine coolant reservoir tank. Refer to CO-35, "RADIATOR" .
2. Remove A/C compressor with piping connected from engine. Temporarily secure it on body 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. Disconnect power steering fluid cooler piping at a point between body and engine. Refer to PS-37,
"HYDRAULIC LINE" .
3. Remove front wheel sensor (LH and RH) for ABS from brake caliper. Refer to BRC-46, "
WHEEL SEN-
SORS" (ABS), BRC-116, "WHEEL SENSORS" (ESP/TCS/ABS).
4. Remove brake caliper with piping connected from steering knuckle. Temporarily secure it on body with a
rope to avoid load on it. Refer to BR-27, "
FRONT DISC BRAKE" .
5. Remove drive shaft (LH and RH) from steering knuckle. Refer to FA X - 11 , "
FRONT DRIVE SHAFT" .
6. Preparation for the separation work of transaxle as follows:
a. Remove crankshaft position sensor from transmission. Refer toEM-157, "
OIL PAN AND OIL STRAINER" .
b. Remove transaxle joint bolts which pierce at oil pan (lower) rear side. Refer to EM-157, "
OIL PAN AND
OIL STRAINER" .

ENGINE ASSEMBLY
EM-225
[YD22DDTi]
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INSPECTION AFTER INSTALLATION
Inspection for Leaks
The following are procedures for checking fluids leak, lubricates leak and exhaust gases leak.

Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to MA-17, "
RECOMMENDED FLUIDS AND LUBRICANTS" .

Before starting engine, bleed air from fuel piping. Refer to FL-18, "Air Bleeding" .

Run engine to check for unusual noise and vibration.

Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gases, or any oil/fluids
including engine oil and engine coolant.

Bleed air from lines and hoses of applicable lines, such as in cooling system.

After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.
Summary of the inspection items:
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gases — Leakage —

ENGINE ASSEMBLY
EM-229
[YD22DDTi]
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9. Remove power steering oil pump with piping connected from engine. Move it aside on suspension mem-
ber. Refer to PS-37, "
HYDRAULIC LINE" .
10. Remove front engine mounting and rear engine mounting through-bolts to remove suspension member.
11. Remove starter motor. Refer to SC-23, "
STARTING SYSTEM" .
12. Separate engine and transaxle and transfer assembly. Refer to MT-19, "
TRANSAXLE ASSEMBLY" .
INSTALLATION
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-222, "
ENGINE ASSEMBLY" .

Make sure that each mounting insulator is seated properly, and tighten mounting bolts and nuts.
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The following are procedures for checking fluids leak, lubricates leak and exhaust gases leak.

Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to MA-17, "
RECOMMENDED FLUIDS AND LUBRICANTS" .

Before starting engine, bleed air from fuel piping. Refer to FL-18, "Air Bleeding" .

Run engine to check for unusual noise and vibration.

Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gases, or any oil/fluids
including engine oil and engine coolant.

Bleed air from lines and hoses of applicable lines, such as in cooling system.

After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.
Summary of the inspection items:
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gases — Leakage —

EC-4 CONSULT-II Reference Value in Data Monitor Mode
.306
On Board Diagnosis Logic ....................................306
DTC Confirmation Procedure ...............................306
Wiring Diagram .....................................................308
Diagnostic Procedure ...........................................311
Component Inspection ..........................................313
DTC P1128 THROTTLE CONTROL MOTOR .........314
Component Description ........................................314
On Board Diagnosis Logic ....................................314
DTC Confirmation Procedure ...............................314
Wiring Diagram .....................................................315
Diagnostic Procedure ...........................................319
Component Inspection ..........................................320
Removal and Installation ......................................321
DTC P1143 HO2S1 .................................................322
Component Description ........................................322
CONSULT-II Reference Value in Data Monitor Mode
.322
On Board Diagnosis Logic ....................................322
DTC Confirmation Procedure ...............................323
Overall Function Check ........................................323
Diagnostic Procedure ...........................................324
Component Inspection ..........................................326
Removal and Installation ......................................327
DTC P1144 HO2S1 .................................................328
Component Description ........................................328
CONSULT-II Reference Value in Data Monitor Mode
.328
On Board Diagnosis Logic ....................................328
DTC Confirmation Procedure ...............................329
Overall Function Check ........................................329
Diagnostic Procedure ...........................................330
Component Inspection ..........................................332
Removal and Installation ......................................333
DTC P1146 HO2S2 .................................................334
Component Description ........................................334
CONSULT-II Reference Value in Data Monitor Mode
.334
On Board Diagnosis Logic ....................................334
DTC Confirmation Procedure ...............................335
Overall Function Check ........................................336
Wiring Diagram .....................................................337
Diagnostic Procedure ...........................................338
Component Inspection ..........................................340
Removal and Installation ......................................341
DTC P1147 HO2S2 .................................................342
Component Description ........................................342
CONSULT-II Reference Value in Data Monitor Mode
.342
On Board Diagnosis Logic ....................................342
DTC Confirmation Procedure ...............................343
Overall Function Check ........................................344
Wiring Diagram .....................................................345
Diagnostic Procedure ...........................................346
Component Inspection ..........................................348
Removal and Installation ......................................349
DTC P1211 TCS CONTROL UNIT ..........................350
Description ............................................................350On Board Diagnosis Logic ....................................350
DTC Confirmation Procedure ................................350
Diagnostic Procedure ............................................350
DTC P1212 TCS COMMUNICATION LINE .............351
Description ............................................................351
On Board Diagnosis Logic ....................................351
DTC Confirmation Procedure ................................351
Diagnostic Procedure ............................................351
DTC P1217 ENGINE OVER TEMPERATURE ........352
System Description ...............................................352
CONSULT-II Reference Value in Data Monitor Mode
.353
On Board Diagnosis Logic ....................................353
Overall Function Check .........................................353
Wiring Diagram .....................................................356
Diagnostic Procedure ............................................359
Main 12 Causes of Overheating ...........................366
Component Inspection ..........................................367
DTC P1225 TP SENSOR ........................................368
Component Description ........................................368
On Board Diagnosis Logic ....................................368
DTC Confirmation Procedure ................................368
Diagnostic Procedure ............................................369
Removal and Installation .......................................369
DTC P1226 TP SENSOR ........................................370
Component Description ........................................370
On Board Diagnosis Logic ....................................370
DTC Confirmation Procedure ................................370
Diagnostic Procedure ............................................371
Removal and Installation .......................................371
DTC P1229 SENSOR POWER SUPPLY ................372
On Board Diagnosis Logic ....................................372
DTC Confirmation Procedure ................................372
Wiring Diagram .....................................................373
Diagnostic Procedure ............................................374
DTC P1564 ASCD STEERING SWITCH ................377
Component Description ........................................377
CONSULT-II Reference Value in Data Monitor Mode
.377
On Board Diagnosis Logic ....................................377
DTC Confirmation Procedure ................................378
Wiring Diagram .....................................................379
Diagnostic Procedure ............................................383
Component Inspection ..........................................386
DTC P1572 ASCD BRAKE SWITCH ......................387
Component Description ........................................387
CONSULT-II Reference Value in Data Monitor Mode
.387
On Board Diagnosis Logic ....................................387
DTC Confirmation Procedure ................................388
Wiring Diagram .....................................................389
Diagnostic Procedure ............................................390
Component Inspection ..........................................395
DTC P1574 ASCD VEHICLE SPEED SENSOR .....396
System Description ...............................................396
On Board Diagnosis Logic ....................................396
DTC Confirmation Procedure ................................396
Diagnostic Procedure ............................................397

EC-8 Component Inspection ..........................................735
Removal and Installation ......................................736
DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY .....................................................................737
Component Description ........................................737
CONSULT-II Reference Value in Data Monitor Mode
.737
On Board Diagnosis Logic ....................................737
DTC Confirmation Procedure ...............................737
Wiring Diagram .....................................................739
Diagnostic Procedure ...........................................742
Component Inspection ..........................................744
DTC P1128 THROTTLE CONTROL MOTOR .........745
Component Description ........................................745
On Board Diagnosis Logic ....................................745
DTC Confirmation Procedure ...............................745
Wiring Diagram .....................................................746
Diagnostic Procedure ...........................................750
Component Inspection ..........................................751
Removal and Installation ......................................752
DTC P1211 TCS CONTROL UNIT ..........................753
Description ............................................................753
On Board Diagnosis Logic ....................................753
DTC Confirmation Procedure ...............................753
Diagnostic Procedure ...........................................753
DTC P1212 TCS COMMUNICATION LINE ............754
Description ............................................................754
On Board Diagnosis Logic ....................................754
DTC Confirmation Procedure ...............................754
Diagnostic Procedure ...........................................754
DTC P1217 ENGINE OVER TEMPERATURE ........755
System Description ...............................................755
CONSULT-II Reference Value in Data Monitor Mode
.756
On Board Diagnosis Logic ....................................756
Overall Function Check ........................................756
Wiring Diagram .....................................................759
Diagnostic Procedure ...........................................762
Main 12 Causes of Overheating ...........................769
Component Inspection ..........................................770
DTC P1225 TP SENSOR ........................................771
Component Description ........................................771
On Board Diagnosis Logic ....................................771
DTC Confirmation Procedure ...............................771
Diagnostic Procedure ...........................................772
Removal and Installation ......................................772
DTC P1226 TP SENSOR ........................................773
Component Description ........................................773
On Board Diagnosis Logic ....................................773
DTC Confirmation Procedure ...............................773
Diagnostic Procedure ...........................................774
Removal and Installation ......................................774
DTC P1229 SENSOR POWER SUPPLY ................775
On Board Diagnosis Logic ....................................775
DTC Confirmation Procedure ...............................775
Wiring Diagram .....................................................776
Diagnostic Procedure ...........................................777
DTC P1564 ASCD STEERING SWITCH ................780
Component Description ........................................780CONSULT-II Reference Value in Data Monitor Mode
.780
On Board Diagnosis Logic ....................................780
DTC Confirmation Procedure ................................781
Wiring Diagram .....................................................782
Diagnostic Procedure ............................................786
Component Inspection ..........................................789
DTC P1572 ASCD BRAKE SWITCH ......................790
Component Description ........................................790
CONSULT-II Reference Value in Data Monitor Mode
.790
On Board Diagnosis Logic ....................................790
DTC Confirmation Procedure ................................791
Overall Function Check .........................................791
Wiring Diagram .....................................................793
Diagnostic Procedure ............................................794
Component Inspection ..........................................799
DTC P1574 ASCD VEHICLE SPEED SENSOR .....800
Component Description ........................................800
On Board Diagnosis Logic ....................................800
DTC Confirmation Procedure ................................800
Diagnostic Procedure ............................................801
DTC P1706 PNP SWITCH .......................................802
Component Description ........................................802
CONSULT-II Reference Value in Data Monitor Mode
.802
On Board Diagnosis Logic ....................................802
DTC Confirmation Procedure ................................802
Overall Function Check .........................................802
Wiring Diagram .....................................................804
Diagnostic Procedure ............................................805
DTC P1720 VSS ......................................................807
Description ............................................................807
CONSULT-II Reference Value in Data Monitor Mode
.807
On Board Diagnosis Logic ....................................807
DTC Confirmation Procedure ................................807
Diagnostic Procedure ............................................808
DTC P1805 BRAKE SWITCH .................................809
Description ............................................................809
CONSULT-II Reference Value in Data Monitor Mode
.809
On Board Diagnosis Logic ....................................809
DTC Confirmation Procedure ................................809
Wiring Diagram .....................................................811
Diagnostic Procedure ............................................812
Component Inspection ..........................................813
DTC P2122, P2123 APP SENSOR .........................815
Component Description ........................................815
CONSULT-II Reference Value in Data Monitor Mode
.815
On Board Diagnosis Logic ....................................815
DTC Confirmation Procedure ................................816
Wiring Diagram .....................................................817
Diagnostic Procedure ............................................819
Component Inspection ..........................................821
Removal and Installation .......................................821
DTC P2127, P2128 APP SENSOR .........................822
Component Description ........................................822

EC-34
[QR (WITH EURO-OBD)]
ENGINE CONTROL SYSTEM

System ChartEBS010L8
*1: This sensor is not used to control the engine system under normal conditions.
*2: This input signal is sent to the ECM through CAN communication line.
*3: This output signal is sent from the ECM through CAN communication line.
*4: For models with ESP
*5: For models without ESP
*6: For QR25DE engine modelsInput (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

Stop lamp switch

Heated oxygen sensor 2*1

TCM (Transmission control module)*2

ESP/TCS/ABS control unit*2 *4

ABS actuator and electric unit
(control unit)*2 *5

Air conditioner switch

Wheel sensor*2

Electrical load signal

ASCD steering switch*6

ASCD brake switch*6

ASCD clutch switch*6

Stop lamp switchFuel injection & mixture ratio control Fuel injector
Electronic ignition system Power transistor
Fuel pump control Fuel pump relay
On board diagnostic system
MI (On the instrument panel)*
3
Heated oxygen sensor 1 heater control Heated oxygen sensor 1 heater
Heated oxygen sensor 2 heater control Heated oxygen sensor 2 heater
EVAP canister purge flow controlEVAP canister purge volume control
solenoid valve
Air conditioning cut control Air conditioner relay
Power valve control*
6VIAS control solenoid valve
ASCD vehicle speed control*
6Electric throttle control actuator
Cooling fan control Cooling fan relay

ENGINE CONTROL SYSTEM
EC-35
[QR (WITH EURO-OBD)]
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Multiport Fuel Injection (MFI) SystemEBS010L9
INPUT/OUTPUT SIGNAL CHART
*1: This sensor is not used to control the engine system under normal conditions.
*2: This signal is sent to the ECM through CAN communication line.
*3: ECM determines the start signal status by the signals of engine speed and battery voltage.
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
by input signals (for engine speed and intake air) from both the crankshaft position sensor and the mass air
flow sensor.
VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION
In addition, the amount of fuel injected is compensated to improve engine performance under various operat-
ing conditions as listed below.


During warm-up

When starting the engine

During acceleration

Hot-engine operation

When selector lever is changed from N to D (A/T models)

High-load, high-speed operation


During deceleration

During high engine speed operation
Sensor Input Signal to ECMECM
functionActuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
3 and piston position
Fuel injec-
tion & mix-
ture ratio
controlFuel injector 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
Knock sensor Engine knocking condition
Battery
Battery voltage*
3
Power steering pressure sensor Power steering operation
Heated oxygen sensor 2*
1Density of oxygen in exhaust gas
Wheel sensor*
2Vehicle speed
Air conditioner switch Air conditioner operation