Nissan Juke (2014 year). Service Repair Manual

EC-22

< SYSTEM DESCRIPTION >

[MR16DDT ]

COMPONENT PARTS

Fuel Injector

INFOID:0000000009753041

For the fuel injector, a high pressure fuel injector is used and this
enables a high-pressure fuel injection at a high voltage within a short
time. The ECM is equipped with an injector driver unit and actuates
the fuel injector at a high voltage (approximately 65 V at the maxi-
mum).

High Pressure Fuel Pump

INFOID:0000000009753042

The high pressure fuel pump is activated by the exhaust camshaft.
ECM controls the high pressure fuel pump control solenoid valve built into the high pressure fuel pump and
adjusts the amount of discharge by changing the suction timing of the low pressure fuel.

Operating Description

Operating Chart

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COMPONENT PARTS

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< SYSTEM DESCRIPTION >

[MR16DDT ]

Fuel Rail Pressure Sensor

INFOID:0000000009753043

The fuel rail pressure (FRP) sensor is placed to the fuel rail and
measures fuel pressure in the fuel rail. The sensor transmits voltage
signal to the ECM. As the pressure increases, the voltage rises. The
ECM controls the fuel pressure in the fuel rail by operating high pres-
sure fuel pump. The ECM uses the signal from fuel rail pressure sen-
sor as a feedback signal.

Low Pressure Fuel Pump

INFOID:0000000009753044

The low pressure fuel pump is integrated with a fuel pressure regula-
tor and a fuel filter. This pump is build into the fuel tank.

Fuel Tank Temperature Sensor

INFOID:0000000009753045

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

<Reference data>

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

Fuel Level Sensor

INFOID:0000000009753046

The fuel level sensor is mounted in the fuel level sensor unit.
The sensor detects a fuel level in the fuel tank and transmits a signal to the combination meter. The combina-
tion meter sends the fuel level sensor signal to the ECM via the CAN communication line.
It consists of two parts, one is mechanical float and the other is variable resistor. Fuel level sensor output volt-
age changes depending on the movement of the fuel mechanical float.

JSBIA0291ZZ

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SEF012P

Fluid temperature

[

C (

F)]

Voltage*

[V]

Resistance

Ω

]

20 (68)

3.5

2.3 - 2.7

50 (122)

2.2

0.79 - 0.90

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< SYSTEM DESCRIPTION >

[MR16DDT ]

COMPONENT PARTS

Mass Air Flow Sensor (With Intake Air Temperature Sensor 1)

INFOID:0000000009753047

MASS AIR FLOW SENSOR

The mass air flow sensor (1) is placed in the stream of intake air. It
measures the intake flow rate by measuring a part of the entire
intake flow. The mass air flow sensor controls the temperature of the
hot wire to a certain amount. The heat generated by the hot wire is
reduced as the intake air flows around it. The more air, the greater
the heat loss.
Therefore, the electric current supplied to hot wire is changed to
maintain the temperature of the hot wire as air flow increases. The
ECM detects the air flow by means of this current change.

INTAKE AIR TEMPERATURE SENSOR 1

The intake air temperature sensor 1 is built-into mass air flow sensor. The sensor detects intake air tempera-
ture and transmits a signal to the ECM.
The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical
resistance of the thermistor decreases in response to the temperature rise.

<Reference data>

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

Turbocharger

INFOID:0000000009753048

Turbocharger boost is controlled by adjusting the pressure to the dia-
phragm of the boost control actuator.

TURBOCHARGER BOOST CONTROL SOLENOID VALVE

Turbocharger boost control solenoid valve is ON/OFF duty controlled by ECM.

PBIA9559J

Intake air temperature

[

C (

F)]

Voltage

(V)

Resistance (k

Ω

)

25 (77)

3.3

1.800 - 2.200

80 (176)

1.2

0.283 - 0.359

SEF012P

JPBIA4612ZZ

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COMPONENT PARTS

EC-25

< SYSTEM DESCRIPTION >

[MR16DDT ]

And it adjusts the pressure in the diaphragm of the boost control
actuator. The longer the turbocharger boost control solenoid valve is
ON, the higher the boost is increased.

Turbocharger Boost Sensor (With Intake Air Temperature Sensor 2)

INFOID:0000000009753049

TURBOCHARGER BOOST SENSOR

The turbocharger boost sensor detects the pressure of the outlet
side of the intercooler. When increasing the pressure, the output
voltage of the sensor to the ECM increases.

INTAKE AIR TEMPERATURE SENSOR 2

The intake air temperature sensor 2 is built-into turbocharger boost sensor. The sensor detects intake air tem-
perature and transmits a signal to the ECM.
The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical
resistance of the thermistor decreases in response to the temperature rise.

<Reference data>

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

From boost pipe

To boost control actuator

To Air cleaner

JPBIA4616ZZ

JPBIA4620ZZ

JMBIA1453GB

Intake air temperature

[

C (

F)]

Voltage

(V)

Resistance (k

Ω

)

25 (77)

3.3

1.800 - 2.200

80 (176)

1.2

0.283 - 0.359

SEF012P

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EC-26

< SYSTEM DESCRIPTION >

[MR16DDT ]

COMPONENT PARTS

Engine Coolant Temperature Sensor

INFOID:0000000009753050

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

<Reference data>

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

Crankshaft Position Sensor (POS)

INFOID:0000000009753051

The crankshaft position sensor (POS) is located on the oil pan facing
the gear teeth (cogs) of the signal plate. It detects the fluctuation of
the engine revolution.
The sensor consists of a permanent magnet and Hall IC.
When the 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.
The ECM receives the voltage signal and detects the fluctuation of
the engine revolution.
ECM receives the signals as shown in the figure.

SEF594K

Engine coolant 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)

0.9

0.236 - 0.260

SEF012P

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COMPONENT PARTS

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< SYSTEM DESCRIPTION >

[MR16DDT ]

Camshaft Position Sensor (PHASE)

INFOID:0000000009753052

The camshaft position sensor (PHASE) senses the retraction of
intake camshaft to identify a particular cylinder. The camshaft posi-
tion sensor (PHASE) senses the piston position.
When the crankshaft position sensor (POS) system becomes inoper-
ative, the camshaft position sensor (PHASE) provides various con-
trols of engine parts instead, utilizing timing of cylinder identification
signals.
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.
ECM receives the signals as shown in the figure.

Intake Valve Timing Control Solenoid Valve

INFOID:0000000009753053

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

Exhaust Valve Timing Control Position Sensor

INFOID:0000000009753054

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.

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JMBIA0714GB

PBIB1842E

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EC-28

< SYSTEM DESCRIPTION >

[MR16DDT ]

COMPONENT PARTS

Exhaust Valve Timing Control Solenoid Valve

INFOID:0000000009753055

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.

Air Fuel Ratio (A/F) Sensor 1

INFOID:0000000009753056

DESCRIPTION

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 hydrocar-
bon 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:0000000009753057

DESCRIPTION

PBIB1842E

JPBIA4038GB

PBIB3354E

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COMPONENT PARTS

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< SYSTEM DESCRIPTION >

[MR16DDT ]

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.

Knock Sensor

INFOID:0000000009753058

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:0000000009753059

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

SEF327R

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

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EC-30

< SYSTEM DESCRIPTION >

[MR16DDT ]

COMPONENT PARTS

Engine Oil Temperature Sensor

INFOID:0000000009753060

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.

<Reference data>

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

Cooling Fan

INFOID:0000000009753061

COOLING FAN CONTROL MODULE

Cooling fan control module receives ON/OFF pulse duty signal from IPDM E/R. Corresponding to this ON/OFF
pulse duty signal, cooling fan control module sends cooling fan motor operating voltage to cooling fan motor.
The revolution speed of cooling fan motor is controlled by duty cycle of the voltage.

COOLING FAN MOTOR

Cooling fan motor receives cooling fan motor operating voltage from cooling fan control module. The revolu-
tion speed of cooling fan motor is controlled by duty cycle of the voltage.

EVAP Canister Purge Volume Control Solenoid Valve

INFOID:0000000009753062

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.

SEF594K

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)

0.9

0.236 - 0.260

110 (230)

0.6

0.143 - 0.153

SEF012P

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COMPONENT PARTS

EC-31

< SYSTEM DESCRIPTION >

[MR16DDT ]

EVAP Canister Vent Control Valve

INFOID:0000000009753063

The EVAP canister vent control valve is located on the EVAP canis-
ter and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal
the vent is necessary for the on board diagnosis of other evaporative
emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the evapo-
rative emission control system is depressurized and allows “EVAP
Control System” diagnosis.

EVAP Control System Pressure Sensor

INFOID:0000000009753064

The EVAP control system pressure sensor detects pressure in the
purge line. The sensor output voltage to the ECM increases as pres-
sure increases.

Battery Current Sensor (With Battery Temperature Sensor)

INFOID:0000000009753065

OUTLINE

The power generation voltage variable control enables fuel con-
sumption to be decreased by reducing the engine load which is
caused by the power generation of the generator.
Based on sensor signals, ECM judges whether or not the power
generation voltage variable control is performed. When performing
the power generation voltage variable control, ECM calculates the
target power generation voltage based on the sensor signal. And
ECM sends the calculated value as the power generation command
value to IPDM E/R. For the details of the power generation voltage
variable control, refer to

CHG-8, "POWER GENERATION VOLTAGE

VARIABLE CONTROL SYSTEM : System Description"

CAUTION:

Never connect the electrical component or the ground wire directly to the battery terminal. The con-
nection causes the malfunction of the power generation voltage variable control, and then the battery
discharge may occur.

BATTERY CURRENT SENSOR

The battery current sensor is installed to the battery negative cable. The sensor measures the charging/dis-
charging current of the battery.

BATTERY TEMPERATURE SENSOR

PBIB1263E

PBIB3370E

JPBIA3262ZZ

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EC-32

< SYSTEM DESCRIPTION >

[MR16DDT ]

COMPONENT PARTS

Battery temperature sensor is integrated in battery current sensor.
The sensor measures temperature around the battery.
The electrical resistance of the thermistor decreases as temperature
increases.
<Reference data>

*: These data are reference values and are measured between battery temperature
sensor signal terminal and sensor ground.

Malfunction Indicator lamp (MIL)

INFOID:0000000009753066

The Malfunction Indicator lamp (MIL) is located on the combination
meter.
The MIL will illuminate when the ignition switch is turned ON without
the engine running. This is a bulb check.
When the engine is started, the MIL should turn OFF. If the MIL
remains illuminated, the on board diagnostic system has detected an
engine system malfunction.
For details, refer to

EC-68, "DIAGNOSIS DESCRIPTION : Malfunc-

tion Indicator Lamp (MIL)"

Oil Pressure Warning Lamp

INFOID:0000000009753067

Oil pressure warning lamp is located on the combination meter.
It indicates the low pressure of the engine oil and the malfunction of
the engine oil pressure system.
Combination meter turns the oil pressure warning lamp ON/OFF
according to the oil pressure warning lamp signal received from
ECM via CAN communication.

Refrigerant Pressure Sensor

INFOID:0000000009753068

The refrigerant pressure sensor is installed at the condenser of the air conditioner system. The sensor uses an
electrostatic volume pressure transducer to convert refrigerant pressure to voltage. The voltage signal is sent
to ECM, and ECM controls cooling fan system.

Stop Lamp Switch & Brake Pedal Position Switch

INFOID:0000000009753069

Stop lamp switch and brake pedal position switch are installed to brake pedal bracket.
ECM detects the state of the brake pedal by those two types of input (ON/OFF signal).

Temperature [

C (

F)]

Voltage

(V)

Resistance (k

Ω

)

25 (77)

3.333

1.9 - 2.1

90 (194)

0.969

0.222 - 0.258

SEF012P

JSBIA1315ZZ

PBIA8559J

PBIB2657E

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COMPONENT PARTS

EC-33

< SYSTEM DESCRIPTION >

[MR16DDT ]

Clutch Pedal Position Switch

INFOID:0000000009753070

When the clutch pedal is depressed, the clutch pedal position switch turns OFF and the clutch pedal position
switch signal is sent to the ECM. The ECM judges the clutch pedal conditions via the signal (ON or OFF).

ASCD Steering Switch

INFOID:0000000009753071

ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation
of switch, and determines which button is operated.

Information Display

INFOID:0000000009753072

The operation mode of the ASCD is indicated on the information display in the combination meter.
ECM transmits the status signal to the combination meter via CAN communication according to ASCD opera-
tion.

Brake pedal

Brake pedal position switch

Stop lamp switch

Released

OFF

Depressed

OFF

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2014 JUKE

EC-34

< SYSTEM DESCRIPTION >

[MR16DDT ]

STRUCTURE AND OPERATION

STRUCTURE AND OPERATION

Positive Crankcase Ventilation

INFOID:0000000009753073

This system returns blow-by gas to the intake manifold.
The positive crankcase ventilation (PCV) valve is provided to conduct crankcase blow-by gas to the intake
manifold.
During partial throttle operation of the engine, the intake manifold sucks the blow-by gas through the PCV
valve.
Normally, the capacity of the valve is sufficient to handle any blow-by and a small amount of ventilating air.
The ventilating air is then drawn from the air inlet tubes into the crankcase. In this process the air passes
through the hose connecting air inlet tubes to rocker cover.
Under full-throttle condition, the manifold vacuum is insufficient to draw the blow-by flow through the valve.
The flow goes through the hose connection in the reverse direction.
On vehicles with an excessively high blow-by, the valve does not
meet the requirement. This is because some of the flow will go
through the hose connection to the air inlet tubes under all condi-
tions.

PBIB0492E

PBIB1588E

Revision: 2013 October

2014 JUKE

STRUCTURE AND OPERATION

EC-35

< SYSTEM DESCRIPTION >

[MR16DDT ]

On Board Refueling Vapor Recovery (ORVR)

INFOID:0000000009753074

From the beginning of refueling, the air and vapor inside the fuel tank go through refueling EVAP vapor cut
valve and EVAP/ORVR line to the EVAP canister. The vapor is absorbed by the EVAP canister and the air is
released to the atmosphere.
When the refueling has reached the full level of the fuel tank, the refueling EVAP vapor cut valve is closed and
refueling is stopped because of auto shut-off. The vapor which was absorbed by the EVAP canister is purged
during driving.

WARNING:

When conducting inspections below, be sure to observe the following:
• Put a “CAUTION: FLAMMABLE” sign in workshop.
• Do not smoke while servicing fuel system. Keep open flames and sparks away from work area.
• Be sure to furnish the workshop with a CO

fire extinguisher.

CAUTION:

• Before removing fuel line parts, carry out the following procedures:
- Put drained fuel in an explosion-proof container and put lid on securely.
- Release fuel pressure from fuel line. Refer to

EC-557, "Inspection"

- Disconnect battery ground cable.
• Always replace O-ring when the fuel gauge retainer is removed.
• Do not kink or twist hose and tube when they are installed.
• Do not tighten hose and clamps excessively to avoid damaging hoses.
• After installation, run engine and check for fuel leaks at connection.
• Do not attempt to top off the fuel tank after the fuel pump nozzle shuts off automatically.

Continued refueling may cause fuel overflow, resulting in fuel spray and possibly a fire.

JMBIA1930GB

Revision: 2013 October

2014 JUKE

EC-36

< SYSTEM DESCRIPTION >

[MR16DDT ]

SYSTEM

SYSTEM

ENGINE CONTROL SYSTEM

ENGINE CONTROL SYSTEM : System Diagram

INFOID:0000000009753075

ENGINE CONTROL SYSTEM : System Description

INFOID:0000000009753076

ECM controls the engine by various functions.

JPBIA5480GB

Revision: 2013 October

2014 JUKE

Nissan Juke (2014 year). Service Repair Manual - part 80