2003 NISSAN X-TRAIL ENGINE CONTROL

TERMINOLOGY
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Exhaust gas recirculation control-BPT
valveEGRC-BPT valve BPT valve
Exhaust gas recirculation control-solenoid
valveEGRC-solenoid valve EGR control solenoid valve
Exhaust gas recirculation temperature sen-
sor
EGRT sensor Exhaust gas temperature sensor
EGR temperature sensor
Flash electrically erasable programmable
read only memoryFEEPROM ***
Flash erasable programmable read only
memoryFEPROM ***
Flexible fuel sensor FFS ***
Flexible fuel system FF system ***
Fuel pressure regulator *** Pressure regulator
Fuel pressure regulator control solenoid
valve*** PRVR control solenoid valve
Fuel trim FT ***
Heated Oxygen sensor HO2S Exhaust gas sensor
Idle air control system IAC system Idle speed control
Idle air control valve-air regulator IACV-air regulator Air regulator
Idle air control valve-auxiliary air control
valveIACV-AAC valve Auxiliary air control (AAC) valve
Idle air control valve-FICD solenoid valve IACV-FICD solenoid valve FICD solenoid valve
Idle air control valve-idle up control sole-
noid valveIACV-idle up control solenoid valve Idle up control solenoid valve
Idle speed control-FI pot ISC-FI pot FI pot
Idle speed control system ISC system ***
Ignition control IC ***
Ignition control module ICM ***
Indirect fuel injection system IFI system ***
Intake air IA Air
Intake air temperature sensor IAT sensor Air temperature sensor
Knock *** Detonation
Knock sensor KS Detonation sensor
Malfunction indicator lamp MIL Check engine light
Manifold absolute pressure MAP ***
Manifold absolute pressure sensor MAPS ***
Manifold differential pressure MDP ***
Manifold differential pressure sensor MDPS ***
Manifold surface temperature MST ***
Manifold surface temperature sensor MSTS ***
Manifold vacuum zone MVZ ***
Manifold vacuum zone sensor MVZS ***
Mass air flow sensor MAFS Air flow meter
Mixture control solenoid valve MC solenoid valve Air-fuel ratio control solenoid valve
Multiport fuel injection System MFI system Fuel injection controlNEW TERMNEW ACRONYM /
ABBREVIATIONOLD TERM

EM-3
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Parts Requiring Angle Tightening ......................... 122
Precautions For Liquid Gasket ............................. 123
REMOVAL OF LIQUID GASKET ...................... 123
LIQUID GASKET APPLICATION PROCEDURE . 123
PREPARATION ....................................................... 124
Special Service Tools ........................................... 124
Commercial Service Tools .................................... 127
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING ............................................ 129
NVH Troubleshooting — Engine Noise ................ 129
Use the Chart Below to Help You Find the Cause
of the Symptom. ................................................... 130
DRIVE BELTS ......................................................... 131
Checking Drive Belts ............................................ 131
Tension Adjustment .............................................. 131
A/C COMPRESSOR BELT ............................... 132
ALTERNATOR AND WATER PUMP BELT ....... 132
Removal and Installation ...................................... 132
REMOVAL ......................................................... 132
INSTALLATION ................................................. 132
AIR CLEANER AND AIR DUCT ............................. 133
Removal and Installation ...................................... 133
REMOVAL ......................................................... 133
INSTALLATION ................................................. 133
CHANGING AIR CLEANER FILTER ................. 134
CHARGE AIR COOLER ......................................... 135
Removal and Installation ...................................... 135
REMOVAL ......................................................... 135
INSPECTION AFTER REMOVAL ..................... 135
INSTALLATION ................................................. 135
INTAKE MANIFOLD ............................................... 136
Removal and Installation ...................................... 136
REMOVAL ......................................................... 136
INSPECTION AFTER REMOVAL ..................... 137
INSTALLATION ................................................. 137
INSPECTION AFTER INSTALLATION ............. 138
CATALYST .............................................................. 139
Removal and Installation ...................................... 139
REMOVAL ......................................................... 139
INSTALLATION ................................................. 140
EXHAUST MANIFOLD AND TURBOCHARGER .. 141
Removal and Installation ...................................... 141
REMOVAL ......................................................... 141
INSTALLATION ................................................. 142
INSPECTION AFTER INSTALLATION ............. 142
Disassembly and Assembly ................................. 143
DISASSEMBLY ................................................. 143
ASSEMBLY ....................................................... 143
INSPECTION AFTER DISASSEMBLY ............. 143
Turbocharger ........................................................ 144
ROTOR SHAFT CLEARANCE ......................... 144
ROTOR SHAFT END PLAY .............................. 144
TURBINE WHEEL ............................................. 145
COMPRESSOR WHEEL .................................. 145
TURBOCHARGER BOOST CONTROL ACTU-
ATOR ................................................................ 145
TROUBLE DIAGNOSIS OF TURBOCHARGER . 146OIL PAN AND OIL STRAINER ...............................147
Removal and Installation ......................................147
REMOVAL .........................................................147
INSPECTION AFTER REMOVAL .....................149
INSTALLATION .................................................149
INSPECTION AFTER INSTALLATION ..............151
GLOW PLUG ..........................................................152
Removal and Installation ......................................152
REMOVAL .........................................................152
INSTALLATION .................................................152
VACUUM PUMP ......................................................153
Removal and Installation ......................................153
INSPECTION BEFORE REMOVAL ..................153
REMOVAL .........................................................153
INSTALLATION .................................................154
INSPECTION AFTER INSTALLATION ..............155
Disassembly and Assembly ..................................155
DISASSEMBLY .................................................155
ASSEMBLY .......................................................156
INJECTION TUBE AND FUEL INJECTOR ............157
Removal and Installation ......................................157
REMOVAL .........................................................157
INSTALLATION .................................................159
INSPECTION AFTER INSTALLATION ..............160
FUEL PUMP ............................................................161
Removal and Installation ......................................161
REMOVAL .........................................................161
INSPECTION AFTER REMOVAL .....................165
INSTALLATION .................................................165
ROCKER COVER ...................................................168
Removal and Installation ......................................168
REMOVAL .........................................................168
INSTALLATION .................................................169
INSPECTION AFTER INSTALLATION ..............169
CAMSHAFT ............................................................170
Removal and Installation ......................................170
REMOVAL .........................................................170
INSPECTION AFTER REMOVAL .....................171
INSTALLATION .................................................174
Valve Clearance ...................................................175
INSPECTION ....................................................175
ADJUSTMENTS ................................................177
SECONDARY TIMING CHAIN ................................180
Removal and Installation ......................................180
REMOVAL .........................................................180
INSPECTION AFTER REMOVAL .....................182
INSTALLATION .................................................182
PRIMARY TIMING CHAIN ......................................185
Removal and Installation ......................................185
REMOVAL .........................................................187
INSPECTION AFTER REMOVAL .....................190
INSTALLATION .................................................190
CYLINDER HEAD ...................................................196
On-Vehicle Service ...............................................196
CHECKING COMPRESSION PRESSURE .......196
Removal and Installation ......................................197
REMOVAL .........................................................197
INSPECTION AFTER REMOVAL .....................198

INTAKE MANIFOLD
EM-17
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INTAKE MANIFOLDPFP:14003
Removal and Installation (QR20DE)EBS00KNC
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. Remove air cleaner case upper, mass air flow sensor and air duct assembly. Refer to EM-15, "
AIR
CLEANER AND AIR DUCT" .
3. Remove quick connector caps, and disconnect quick connectors
at engine side and vehicle side. Refer to EM-32, "
Removal and
Installation (QR20DE)" .
4. Remove electric throttle control actuator with the following procedure:
a. Disconnect harness connector.
1. Vacuum hose 2. Intake manifold 3. PCV hose
4. Bracket 5. Gasket 6. Electric throttle control actuator
7. Gasket 8. Intake manifold support 9. Gasket
10. Vacuum hose 11.EVAP canister purge volume con-
trol solenoid valve12. Vacuum hose
13. Bracket 14. Bracket
PBIC2172E
PBIC2175E

EM-18
[QR]
INTAKE MANIFOLD

b. Loosen mounting bolts in reverse order as shown in the figure,
and remove electric throttle control actuator and gasket.
CAUTION:

Handle carefully to avoid any shock to electric throttle
control actuator.

Do not disassemble.
5. Disconnect harness, power steering piping, vacuum hose and PCV hose from intake manifold, and move
them aside.
6. Remove intake manifold support and gasket.
7. Disconnect sub-harness from fuel injector. Refer to EM-32, "
Removal and Installation (QR20DE)" .
8. Loosen mounting bolts and nuts in reverse order as shown in
the figure, and remove intake manifold (with fuel tube and fuel
injector assembly) and gasket.
CAUTION:

Do not disassemble intake manifold.

Cover engine openings to avoid entry of foreign materi-
als.
NOTE:
Disregard No. 6 when loosening.
9. Remove fuel tube and fuel injector assembly from intake manifold. Refer to EM-32, "
Removal and Installa-
tion (QR20DE)" .
INSTALLATION
Note the following, and install in the reverse order of removal.
Intake Manifold

If stud bolts were removed, install them and tighten to the specified torque below.

Check if gasket is not dropped from the installation groove of intake manifold.

Tighten in numerical order as shown in the figure.
NOTE:
No. 6 means double tightening of bolt No. 1.
EMJ1612D
PBIC2173E
: 10.8 N·m (1.1 kg-m, 8 ft-lb)
PBIC2173E

INTAKE MANIFOLD
EM-19
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Electric Throttle Control Actuator

Tighten mounting bolts equally and diagonally in several steps
and in numerical order as shown in the figure.

Perform the “Throttle Valve Closed Position Learning” when har-
ness connector of electric throttle control actuator is discon-
nected. Refer to EC-46, "
Throttle Valve Closed Position
Learning" (WITH EURO-OBD) or EC-508, "Throttle Valve
Closed Position Learning" (WITHOUT EURO-OBD).

Perform the “Idle Air Volume Learning” and “Throttle Valve
Closed Position Learning” when electric throttle control actuator
is replaced. Refer to EC-46, "
Idle Air Volume Learning" (WITH
EURO-OBD) or EC-508, "
Idle Air Volume Learning" (WITHOUT
EURO-OBD).
INSPECTION AFTER INSTALLATION
Make sure there are no fuel leaks at connections with the following procedure:
1. Apply fuel pressure to fuel lines with turning ignition switch “ON” (with engine stopped). Then make sure
there are no fuel leaks at connections.
NOTE:
Use mirrors for checking on invisible points.
2. Start engine. With engine speed increased, make sure again there are no fuel leaks at connections.
CAUTION:
Do not touch engine immediately after stopped as engine becomes extremely hot.
EMJ1612D

EM-20
[QR]
INTAKE MANIFOLD

Removal and Installation (QR25DE)EBS011TH
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. Remove air cleaner case upper, mass air flow sensor and air duct assembly. Refer to EM-15, "
AIR
CLEANER AND AIR DUCT" .
3. Remove quick connector caps, and disconnect quick connectors
at engine side and vehicle side. Refer to EM-37, "
Removal and
Installation (QR25DE)" .
4. Remove electric throttle control actuator with the following procedure:
1. Bracket 2. PCV hose 3. Intake manifold collector
4. Gasket 5. Electric throttle control actuator 6. Intake manifold rear support
7.EVAP canister purge volume control
solenoid valve8. Vacuum hose 9. Intake manifold
10. Vacuum reservoir tank 11. VIAS control solenoid valve 12. Vacuum hose
13. Bracket 14. Intake manifold support 15. Vacuum reservoir tank bracket
PBIC2174E
PBIC2175E

INTAKE MANIFOLD
EM-21
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a. Disconnect harness connector.
b. Loosen mounting bolts in reverse order as shown in the figure,
and remove electric throttle control actuator and gasket.
CAUTION:

Handle carefully to avoid any shock to electric throttle
control actuator.

Do not disassemble.
5. Disconnect harness, vacuum hose and PCV hose from intake manifold collector, and move them aside.
6. Remove intake manifold rear support and intake manifold support.
7. Loosen mounting bolts and nuts in reverse order as shown in
the figure, and remove intake manifold collector and gasket.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
NOTE:
Disregard No. 8 when loosening.
8. Disconnect power steering piping from intake manifold, and move them aside.
9. Disconnect sub-harness from fuel injector. Refer to EM-37, "
Removal and Installation (QR25DE)" .
10. Loosen mounting bolts and nuts in reverse order as shown in
the figure, and remove intake manifold (with fuel tube and fuel
injector assembly) and gasket.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
NOTE:
Disregard No. 6 when loosening.
11. Remove fuel tube and fuel injector assembly from intake manifold. Refer to EM-37, "
Removal and Installa-
tion (QR25DE)" .
INSPECTION AFTER REMOVAL
Surface Distortion

Using straightedge and feeler gauge, check the surface distor-
tion of both the intake manifold collector mating surface and the
intake manifold mating surfaces.

If it exceeds the limit, replace intake manifold and/or intake man-
ifold collector.
EMJ1612D
SBIA0230E
SBIA0231E
Limit : 0.1 mm (0.004 in)
KBIA0235E

EM-22
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INTAKE MANIFOLD

INSTALLATION
Note the following, and install in the reverse order of removal.
Intake Manifold

If stud bolts were removed, install them and tighten to the specified torque below.

Tighten in numerical order as shown in the figure.
NOTE:
No. 6 means double tightening of bolt No. 1.
Intake Manifold Collector
Tighten in numerical order as shown in the figure.
NOTE:
No. 8 means double tightening of bolt No. 1.
Electric Throttle Control Actuator

Tighten mounting bolts equally and diagonally in several steps
and in numerical order as shown in the figure.

Perform the “Throttle Valve Closed Position Learning” when har-
ness connector of electric throttle control actuator is discon-
nected. Refer to EC-46, "
Throttle Valve Closed Position
Learning" (WITH EURO-OBD) or EC-508, "Throttle Valve
Closed Position Learning" (WITHOUT EURO-OBD).

Perform the “Idle Air Volume Learning” and “Throttle Valve
Closed Position Learning” when electric throttle control actuator
is replaced. Refer to EC-46, "
Idle Air Volume Learning" (WITH
EURO-OBD) or EC-508, "
Idle Air Volume Learning" (WITHOUT
EURO-OBD).
INSPECTION AFTER INSTALLATION
Make sure there are no fuel leaks at connections with the following procedure:
1. Apply fuel pressure to fuel lines with turning ignition switch “ON” (with engine stopped). Then make sure
there are no fuel leaks at connections.
NOTE:
Use mirrors for checking on invisible points.
2. Start engine. With engine speed increased, make sure again there are no fuel leaks at connections.
CAUTION:
Do not touch engine immediately after stopped as engine becomes extremely hot. : 10.8 N·m (1.1 kg-m, 8 ft-lb)
SBIA0231E
SBIA0230E
EMJ1612D