Idle air volume NISSAN X-TRAIL 2005 Service Repair Manual

EM-20
[QR]
INTAKE MANIFOLD

Intake Manifold Support
Tighten mounting bolt from “A” to “B” in order as shown in the figure.
NOTE:
Tighten “A” in the figure together with electric throttle control actua-
tor. Refer to EM-20, "
Electric Throttle Control Actuator" for the tight-
ening procedure.
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-47, "
Throttle Valve Closed Position
Learning" (WITH EURO-OBD) or EC-560, "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-47, "
Idle Air Volume Learning" (WITH
EURO-OBD) or EC-560, "
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.
PBIC2628E
EMJ1612D

INTAKE MANIFOLD
EM-23
[QR]
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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.
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-47, "
Throttle Valve Closed Position
Learning" (WITH EURO-OBD) or EC-560, "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-47, "
Idle Air Volume Learning" (WITH
EURO-OBD) or EC-560, "
Idle Air Volume Learning" (WITHOUT
EURO-OBD). Limit : 0.1 mm (0.004 in)
KBIA0235E
: 10.8 N·m (1.1 kg-m, 8 ft-lb)
SBIA0231E
SBIA0230E
EMJ1612D

EM-266
[YD22DDTi]
SERVICE DATA AND SPECIFICATIONS (SDS)

Bearing Oil Clearance
Unit: mm (in)
Tightening TorqueEBS01FCN
*1: Parts to be tightened in particular orders.
1)-: Order of tightening when tightening two or more times separately.
Unit: N·m (kg-m, ft-lb)
Unit: N·m (kg-m, in-lb)*2
Connecting rod bearing oil
clearanceStandard 0.031 - 0.061 (0.0012 - 0.0024)
Idler pulley Nut A 35 (3.6, 26)
Alternator Nut C 21.5 (2.2, 16)
Nut D 50.5 (5.2, 37)
Charge air cooler Bracket 22 (2.2, 16)
Charge air cooler cover
7.0 (0.71, 62)*
2
EGR volume control valve 70 (7.1, 52)
EGR cooler Exhaust manifold side 64.5 (6.6, 48)
EGR volume control
valve side70 (7.1, 52)
EGR volume control valve bracket 23.5 (2.4, 17)
Exhaust manifold insulator
7.4 (0.75, 65)*
2
*1 Exhaust manifold31 (3.2, 23)
Turbocharger48.5 (4.9, 36)
Catalyst48.5 (4.9, 36)
Catalyst rear diffuser33.5 (3.4, 25)
Catalyst insulator Catalyst side
7.4 (0.75, 65)*
2
Catalyst rear diffuser
side9.6 (0.97, 85)*
2
Oil pan lower
7 (0.7, 62)*2
Oil pan drain plug34 (3.5, 25)
Oil strainer17 (1.7, 13)
*1 Oil pan upper M6 bolt
7 (0.7, 62)*
2
M8 bolt 21.5 (2.2, 16)
M10 bolt 33.5 (3.4, 25)
Vacuum pump23.5 (2.4, 17)
Cylinder head rear cover M6 bolt
9.7 (0.98, 86) *
2
M8 bolt 17 (1.7, 13)
Injection tube Nozzle side 23.0 (2.3, 17)
Fuel rail side 23.0 (2.3, 17)
Injection tube center23.0 (2.3, 17)
Nozzle support26.2 (2.7, 19)
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)

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 .................... 35
Electronic Ignition (EI) System ............................... 37
Air Conditioning Cut Control ................................... 38
Fuel Cut Control (at No Load and High Engine
Speed) .................................................................... 38
CAN Communication Unit ...................................... 39
BASIC SERVICE PROCEDURE .............................. 45
Idle Speed and Ignition Timing Check .................... 45
Accelerator Pedal Released Position Learning ...... 46
Throttle Valve Closed Position Learning ................ 47
Idle Air Volume Learning ........................................ 47
Fuel Pressure Check .............................................. 49
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 52
Introduction ............................................................ 52
Two Trip Detection Logic ........................................ 52
Emission-related Diagnostic Information ................ 53
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 ................................. 77
Fail-Safe Chart ....................................................... 78
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 (ENGINE) ..........................103
Generic Scan Tool (GST) Function .......................113
CONSULT-II Reference Value in Data Monitor Mode
.115
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................118
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .120
Description ............................................................120
Testing Condition ..................................................120
Inspection Procedure ............................................120
Diagnostic Procedure ...........................................121
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................124
Description ............................................................124
Diagnostic Procedure ...........................................124
POWER SUPPLY AND GROUND CIRCUIT ...........125
Wiring Diagram .....................................................125
Diagnostic Procedure ...........................................126
Component Inspection ..........................................132
Ground Inspection ................................................132
DTC U1000, U1001 CAN COMMUNICATION LINE .133
Description ............................................................133
On Board Diagnosis Logic ....................................133
DTC Confirmation Procedure ...............................133
Wiring Diagram .....................................................134
Diagnostic Procedure ...........................................135
DTC P0011 IVT CONTROL .....................................136
Description ............................................................136
CONSULT-II Reference Value in Data Monitor Mode
.136
On Board Diagnosis Logic ....................................137

EC-6 Wiring Diagram .....................................................515
Diagnostic Procedure ...........................................517
MI & DATA LINK CONNECTORS ...........................518
Wiring Diagram .....................................................518
EVAPORATIVE EMISSION SYSTEM .....................522
Description ............................................................522
Component Inspection ..........................................525
POSITIVE CRANKCASE VENTILATION ...............527
Description ............................................................527
Component Inspection ..........................................527
AUTOMATIC SPEED CONTROL DEVICE (ASCD) .529
System Description ...............................................529
Component Description ........................................530
SERVICE DATA AND SPECIFICATIONS (SDS) ....531
Fuel Pressure .......................................................531
Idle Speed and Ignition Timing .............................531
Calculated Load Value ..........................................531
Mass Air Flow Sensor ...........................................531
Intake Air Temperature Sensor .............................531
Engine Coolant Temperature Sensor ...................531
Heated Oxygen Sensor 1 Heater .........................531
Heated Oxygen sensor 2 Heater ..........................532
Crankshaft Position Sensor (POS) .......................532
Camshaft Position Sensor (PHASE) ....................532
Throttle Control Motor ...........................................532
Injector ..................................................................532
Fuel Pump ............................................................532
QR (WITHOUT EURO-OBD)
INDEX FOR DTC .....................................................533
Alphabetical Index ................................................533
DTC No. Index ......................................................535
PRECAUTIONS .......................................................537
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ...............................................................537
On Board Diagnostic (OBD) System of Engine ....537
Precaution ............................................................537
Wiring Diagrams and Trouble Diagnosis ..............540
PREPARATION .......................................................541
Special Service Tools ...........................................541
Commercial Service Tools ....................................542
ENGINE CONTROL SYSTEM ................................543
System Diagram ...................................................543
Vacuum Hose Drawing .........................................545
System Chart ........................................................547
Multiport Fuel Injection (MFI) System ...................548
Electronic Ignition (EI) System .............................550
Air Conditioning Cut Control .................................551
Fuel Cut Control (at No Load and High Engine
Speed) ..................................................................551
CAN Communication Unit .....................................552
BASIC SERVICE PROCEDURE .............................558
Idle Speed and Ignition Timing Check ..................558
Accelerator Pedal Released Position Learning ....559
Throttle Valve Closed Position Learning ...............560
Idle Air Volume Learning ......................................560
Fuel Pressure Check ............................................562ON BOARD DIAGNOSTIC (OBD) SYSTEM ...........565
Introduction ...........................................................565
Two Trip Detection Logic .......................................565
Emission-related Diagnostic Information ..............565
NATS (Nissan Anti-theft System) ..........................567
Malfunction Indicator (MI) .....................................568
TROUBLE DIAGNOSIS ..........................................572
Trouble Diagnosis Introduction .............................572
DTC Inspection Priority Chart ...............................576
Fail-Safe Chart ......................................................577
Basic Inspection ....................................................578
Symptom Matrix Chart ..........................................584
Engine Control Component Parts Location ...........588
Circuit Diagram .....................................................593
ECM Harness Connector Terminal Layout ............595
ECM Terminals and Reference Value ...................595
CONSULT-II Function (ENGINE) ..........................604
CONSULT-II Reference Value in Data Monitor Mode
.615
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................618
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .620
Description ............................................................620
Testing Condition ..................................................620
Inspection Procedure ............................................620
Diagnostic Procedure ............................................621
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................624
Description ............................................................624
Diagnostic Procedure ............................................624
POWER SUPPLY AND GROUND CIRCUIT ...........625
Wiring Diagram .....................................................625
Diagnostic Procedure ............................................626
Component Inspection ..........................................632
Ground Inspection .................................................632
DTC U1000, U1001 CAN COMMUNICATION LINE .633
Description ............................................................633
On Board Diagnosis Logic ....................................633
DTC Confirmation Procedure ................................633
Wiring Diagram .....................................................634
Diagnostic Procedure ............................................635
DTC P0011 IVT CONTROL .....................................636
Description ............................................................636
CONSULT-II Reference Value in Data Monitor Mode
.637
On Board Diagnosis Logic ....................................637
DTC Confirmation Procedure ................................637
Overall Function Check .........................................639
Wiring Diagram .....................................................640
Diagnostic Procedure ............................................641
Component Inspection ..........................................643
Removal and Installation .......................................643
DTC P0102, P0103 MAF SENSOR .........................644
Component Description ........................................644
CONSULT-II Reference Value in Data Monitor Mode
.644
On Board Diagnosis Logic ....................................644
DTC Confirmation Procedure ................................644
Wiring Diagram .....................................................646

BASIC SERVICE PROCEDURE
EC-47
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3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON and wait at least 2 seconds.
5. Turn ignition switch OFF and wait at least 10 seconds.
Throttle Valve Closed Position LearningEBS010LG
DESCRIPTION
Throttle Valve Closed Position Learning is an operation to learn the fully closed position of the throttle valve by
monitoring the throttle position sensor output signal. It must be performed each time harness connector of
electric throttle control actuator or ECM is disconnected.
OPERATION PROCEDURE
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
Make sure that throttle valve moves during above 10 seconds by confirming the operating sound.
Idle Air Volume LearningEBS010LH
DESCRIPTION
Idle Air Volume Learning is an operation to learn the idle air volume that keeps each engine within the specific
range. It must be performed under any of the following conditions:

Each time electric throttle control actuator or ECM is replaced.

Idle speed or ignition timing is out of specification.
PREPARATION
Before performing Idle Air Volume Learning, make sure that all of the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are missed for even a moment.

Battery voltage: More than 12.9V (At idle)

Engine coolant temperature: 70 - 95°C (158 - 203°F)

PNP switch: ON

Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)
On vehicles equipped with daytime light systems, set lighting switch to the 1st position to light
only small lamps.

Steering wheel: Neutral (Straight-ahead position)

Vehicle speed: Stopped

Transmission: Warmed-up
For A/T models with CONSULT-II, drive vehicle until “FLUID TEMP SE” in “DATA MONITOR” mode of “A/
T” system indicates less than 0.9V.
For A/T models without CONSULT-II and M/T models, drive vehicle for 10 minutes.
OPERATION PROCEDURE
With CONSULT-II
1. Perform EC-46, "Accelerator Pedal Released Position Learning" .
2. Perform EC-47, "
Throttle Valve Closed Position Learning" .
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.
5. Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.
SEF217Z

EC-48
[QR (WITH EURO-OBD)]
BASIC SERVICE PROCEDURE

6. Touch “START” and wait 20 seconds.
7. Make sure that “CMPLT” is displayed on CONSULT-II screen. If
“CMPLT” is not displayed, Idle Air Volume Learning will not be
carried out successfully. In this case, find the cause of the inci-
dent by referring to the DIAGNOSTIC PROCEDURE below.
8. Rev up the engine two or three times and make sure that idle
speed and ignition timing are within the specifications.
Without CONSULT-II
NOTE:

It is better to count the time accurately with a clock.

It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit
has a malfunction.
1. Perform EC-46, "
Accelerator Pedal Released Position Learning" .
2. Perform EC-47, "
Throttle Valve Closed Position Learning" .
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.
5. Turn ignition switch OFF and wait at least 10 seconds.
6. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
7. Repeat the following procedure quickly 5 times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MI stops
blinking and turned ON.
9. Fully release the accelerator pedal within 3 seconds after the MI turned ON.
10. Start engine and let it idle.
11. Wait 20 seconds.
SEF454Y
ITEM SPECIFICATION
Idle speed QR20DE with M/T models: 650 ± 50 rpm (in Neutral position)
Except above: 700 ± 50 rpm [in P or N (A/T), Neutral (M/T) position]
Ignition timing M/T: 15 ± 5° BTDC (in Neutral position)
A/T: 15 ± 5° BTDC (in P or N position)
MBIB0238E
PBIB0665E

BASIC SERVICE PROCEDURE
EC-49
[QR (WITH EURO-OBD)]
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12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the
specifications.
13. If idle speed and ignition timing are not within the specification, Idle Air Volume Learning will not be carried
out successfully. In this case, find the cause of the incident by referring to the DIAGNOSTIC PROCE-
DURE below.
DIAGNOSTIC PROCEDURE
If idle air volume learning cannot be performed successfully, proceed as follows:
1.Check that throttle valve is fully closed.
2.Check PCV valve operation.
3.Check that downstream of throttle valve is free from air leakage.
4.When the above three items check out OK, engine component parts and their installation condi-
tion are questionable. Check and eliminate the cause of the incident.
It is useful to perform EC-120, "
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 CheckEBS010LI
FUEL PRESSURE RELEASE
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:
Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.
ITEM SPECIFICATION
Idle speed QR20DE with M/T models: 650 ± 50 rpm (in Neutral position)
Except above: 700 ± 50 rpm [in P or N (A/T), Neutral (M/T) position]
Ignition timing M/T: 15 ± 5° BTDC (in Neutral position)
A/T: 15 ± 5° BTDC (in P or N position)
SEF214Y
PBIB0508E

TROUBLE DIAGNOSIS
EC-81
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6. PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-47, "
Idle Air Volume Learning" .
Is Idle Air Volume Learning carried out successfully?
Ye s o r N o
Ye s > > G O T O 7 .
No >> 1. Follow the instruction of Idle Air Volume Learning.
2. GO TO 4.
7. CHECK TARGET IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in “DATA MONITOR” mode with CONSULT-II.
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
OK or NG
OK >> GO TO 10.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the Following.

Check camshaft position sensor (PHASE) and circuit. Refer to EC-257, "DTC P0340 CMP SENSOR
(PHASE)" .

Check crankshaft position sensor (POS) and circuit. Refer to EC-250, "DTC P0335 CKP SENSOR (POS)"
.
OK or NG
OK >> GO TO 9.
NG >> 1. Repair or replace.
2. GO TO 4.
9. CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but
this is a rare case.)
2. Perform initialization of NATS system and registration of all NATS ignition key IDs. Refer to BL-108,
"NATS (NISSAN ANTI-THEFT SYSTEM)" .
>> GO TO 4. QR20DE with M/T models
: 650 ± 50 rpm (in Neutral position)
Except above
: 700 ± 50 rpm [in P or N (A/T), Neutral (M/T) position]
QR20DE with M/T models
: 650 ± 50 rpm (in Neutral position)
Except above
: 700 ± 50 rpm [in P or N (A/T), Neutral (M/T) position]
SEF058Y

EC-82
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS

10. CHECK IGNITION TIMING
1. Run engine at idle.
2. Check ignition timing with a timing light.
OK or NG
OK >>INSPECTION END
NG >> GO TO 11.
11 . PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform EC-46, "
Accelerator Pedal Released Position Learning" .
>> GO TO 12.
12. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform EC-47, "
Throttle Valve Closed Position Learning" .
>> GO TO 13.
13. PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-47, "
Idle Air Volume Learning" .
Is Idle Air Volume Learning carried out successfully?
Ye s o r N o
Yes >> GO TO 14.
No >> 1. Follow the instruction of Idle Air Volume Learning.
2. GO TO 4. M/T: 15 ± 5° BTDC (in Neutral position)
A/T: 15 ± 5° BTDC (in P or N position)
PBIB0514E