Nissan X-Trail 32. Manual - part 830

COMPONENT PARTS

EC-449

< SYSTEM DESCRIPTION >

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Exhaust Valve Timing Control Position Sensor

INFOID:0000000010986213

Exhaust valve timing control position sensor detects the protrusion of
the signal plate installed to the exhaust camshaft front end. 
This sensor signal is used for sensing a position of the exhaust cam-
shaft.
The sensor consists of a permanent magnet and Hall IC.
When engine is running, the high and low parts of the teeth cause
the gap with the sensor to change.
The changing gap causes the magnetic field near the sensor to
change.
Due to the changing magnetic field, the voltage from the sensor
changes. 

Exhaust Valve Timing Control Solenoid Valve

INFOID:0000000010986214

Exhaust valve timing control solenoid valve is activated by ON/OFF
pulse duty (ratio) signals from the ECM.
The exhaust valve timing control solenoid valve changes the oil
amount and direction of flow through exhaust valve timing control
unit or stops oil flow.
The longer pulse width retards valve angle.
The shorter pulse width advances valve angle.
When ON and OFF pulse widths become equal, the solenoid valve
stops oil pressure flow to fix the exhaust valve angle at the control
position.

Intake Manifold Runner Control Valve

INFOID:0000000010986215

Intake manifold runner control valve

 is integrated to intake mani-

fold.
Intake manifold runner control valve is mounted each port of the
intake manifold and opened/closed by the intake manifold runner
control valve motor.
ECM controls the intake manifold runner control valve motor, accord-
ing to signals of engine speed, water temperature, etc. and stabilizes
combustion by generating a strong tunmble flow.

INTAKE MANIFOLD RUNNER CONTROL VALVE MOTOR

Intake manifold runner control valve motor is connected to the rear end of the valve shaft.
The motor opens or closes the valve by the output signal of the ECM.

INTAKE MANIFOLD RUNNER CONTROL VALVE POSITION SENSOR

Intake manifold runner control valve position sensor is connected to the front end of the valve shaft.
The sensor consists of valiable resister. It senses the valve shaft movement and feeds the voltage signals to
the ECM.

JPBIA5847ZZ

PBIB1842E

JSBIA4549ZZ

EC-450

< SYSTEM DESCRIPTION >

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COMPONENT PARTS

Air Fuel Ratio (A/F) Sensor 1

INFOID:0000000010986216

The sensor element of the A/F sensor 1 is composed an electrode
layer, which transports ions. It has a heater in the element.

The sensor is capable of precise measurement   = 1, but also in the lean and rich range. Together with its
control electronics, the sensor outputs a clear, continuous signal throughout a wide   range.
The exhaust gas components diffuse through the diffusion layer at the sensor cell. An electrode layer is
applied voltage, and this current relative oxygen density in lean. Also this current relative hydrocarbon density
in rich.
Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of approxi-
mately 760

°

C (1,400

°

F).

A/F SENSOR 1 HEATER

A/F sensor 1 heater is integrated in the sensor.
The ECM performs ON/OFF duty control of the A/F sensor 1 heater corresponding to the engine operating
condition to keep the temperature of A/F sensor 1 element within the specified range.

Heated Oxygen Sensor 2

INFOID:0000000010986217

The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust gas.
Even if switching characteristics of the air fuel ratio (A/F) sensor 1
are shifted, the air fuel ratio is controlled to stoichiometric, by the sig-
nal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1 V in richer conditions to 0 V in leaner con-
ditions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.

HEATED OXYGEN SENSOR 2 HEATER

Heated oxygen sensor 2 heater is integrated in the sensor.
The ECM performs ON/OFF control of the heated oxygen sensor 2 heater corresponding to the engine speed,
amount of intake air and engine coolant temperature. 

JPBIA4038GB

JPBIA5446GB

SEF327R

COMPONENT PARTS

EC-451

< SYSTEM DESCRIPTION >

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Knock Sensor

INFOID:0000000010986218

The knock sensor is attached to the cylinder block. It senses engine
knocking using a piezoelectric element. A knocking vibration from
the cylinder block is sensed as vibrational pressure. This pressure is
converted into a voltage signal and sent to the ECM.

Engine Oil Pressure Sensor

INFOID:0000000010986219

The engine oil pressure (EOP) sensor is detects engine oil pressure
and transmits a voltage signal to the ECM.

Engine Oil Temperature Sensor

INFOID:0000000010986220

The engine oil temperature sensor is used to detect the engine oil
temperature. The sensor modifies a voltage signal from the ECM.
The modified signal returns to the ECM as the engine oil tempera-
ture input. The sensor uses a thermistor which is sensitive to the
change in temperature. The electrical resistance of the thermistor
decreases as temperature increases.

Engine speed

Heated oxygen sensor 2 heater

Above 3,600 rpm

OFF

Below 3,600 rpm after the following conditions are met.
• Engine: After warming up
• Keeping the engine speed between 3,500 and 4,000 rpm for 1 

minute and at idle for 1 minute under no load

ON

JSBIA0284ZZ

JSBIA0292ZZ

JPBIA5280ZZ

EC-452

< SYSTEM DESCRIPTION >

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COMPONENT PARTS

<Reference data>

*: These data are reference values and are measured between ECM terminals.

Cooling Fan

INFOID:0000000010986221

The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant
pressure, and air conditioner ON signal. The control system has 4-step control [HIGH/MIDDLE/LOW/OFF].
Cooling fan operates at each speed when the current flows in the cooling fan motor.
Refer to 

EC-472, "COOLING FAN CONTROL : System Description"

 for cooling fan operation.

EVAP Canister

INFOID:0000000010986222

EVAP canister stores the generated fuel vapors in the sealed fuel
tank to activated charcoals of EVAP canister when the engine is not
operating or when refueling to the fuel tank.

EVAP Canister Purge Volume Control Solenoid Valve

INFOID:0000000010986223

The EVAP canister purge volume control solenoid valve uses a ON/
OFF duty to control the flow rate of fuel vapor from the EVAP canis-
ter. The EVAP canister purge volume control solenoid valve is
moved by ON/OFF pulses from the ECM. The longer the ON pulse,
the greater the amount of fuel vapor that will flow through the valve.

Engine oil temperature

[

°

C (

°

F)]

Voltage

*

 (V)

Resistance (k

Ω

)

–10 (14)

4.4

7.0 - 11.4

20 (68)

3.5

2.37 - 2.63

50 (122)

2.2

0.68 - 1.00

90 (194)

1.0

0.236 - 0.260

110 (230)

0.6

0.143 - 0.153

SEF012P

JSBIA3477ZZ

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