2005 NISSAN X-TRAIL Service Repair Manual

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Page 945 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual PREPARATION
EC-541
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PREPARATIONPFP:00002
Special Service ToolsEBS010WK
Tool number
Tool nameDescription
KV10117100
Heated oxygen
sensor wrenchLoosen

Page 946 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual EC-542
[QR (WITHOUT EURO-OBD)]
PREPARATION

Commercial Service ToolsEBS010WL
Tool name Description Description
Quick connector
releaseRemoving fuel tube quick connectors in engine
room
(Available i

Page 947 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual ENGINE CONTROL SYSTEM
EC-543
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ENGINE CONTROL SYSTEMPFP:23710
System DiagramEBS010WM
QR20DE ENGINE MODELS
PBIB2455E

Page 948 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual EC-544
[QR (WITHOUT EURO-OBD)]
ENGINE CONTROL SYSTEM

QR25DE ENGINE MODELS
PBIB2456E

Page 949 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual ENGINE CONTROL SYSTEM
EC-545
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Vacuum Hose DrawingEBS010WN
QR20DE ENGINE MODELS
Refer to EC-545, "QR20DE ENGINE MODELS" for Vacuum Control System.
PB

Page 950 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual EC-546
[QR (WITHOUT EURO-OBD)]
ENGINE CONTROL SYSTEM

QR25DE ENGINE MODELS
Refer to EC-546, "QR25DE ENGINE MODELS" for Vacuum Control System.
PBIB1445E

Page 951 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual ENGINE CONTROL SYSTEM
EC-547
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System ChartEBS010WO
*1: This sensor is not used to control the engine system under normal conditions.
*2: This input s

Page 952 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual EC-548
[QR (WITHOUT EURO-OBD)]
ENGINE CONTROL SYSTEM

Multiport Fuel Injection (MFI) SystemEBS010WP
INPUT/OUTPUT SIGNAL CHART
*1: This sensor is not used to control the engine system under normal con

EC-548
[QR (WITHOUT EURO-OBD)]
ENGINE CONTROL SYSTEM

Multiport Fuel Injection (MFI) SystemEBS010WP
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 ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
3 and piston position
Fuel injection & mixture
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

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