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Nissan Juke (2016 year). Service Repair Manual - part 155

SYSTEM

EC-55

< SYSTEM DESCRIPTION >

[MR FOR NISMO RS MODELS]

*: ECM determines the start signal status by the engine speed signal and battery voltage.

System Description

Low fuel pressure control

• The low fuel pressure pump is controlled by ECM. The pumped fuel passes through the fuel filter and is sent

to the high pressure fuel pump.

• Low fuel pressure is adjusted by the fuel pressure regulator.

High fuel pressure control

The high pressure fuel pump raises the pressure of the fuel sent from the low pressure fuel pump. Actuated by

the exhaust camshaft, the high pressure fuel pump activates the high pressure fuel pump solenoid based on a

signal received from ECM, and adjusts the amount of discharge by changing the timing of closing the inlet

check valve to control fuel rail pressure.

ELECTRIC IGNITION SYSTEM

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)

Engine speed

Fuel rail pres-
sure control

High pressure fuel pump

Exhaust valve timing control position sensor

Camshaft position

Fuel rail pressure sensor

Fuel rail pressure

Engine coolant temperature sensor

Engine coolant temperature

Throttle position sensor

Throttle position

Accelerator pedal position sensor

Accelerator pedal position

Battery

Battery voltage

JPBIA4706GB

Revision: November 2015

2016 JUKE

EC-56

< SYSTEM DESCRIPTION >

[MR FOR NISMO RS MODELS]

SYSTEM

ELECTRIC IGNITION SYSTEM : System Diagram

INFOID:0000000012197670

ELECTRIC IGNITION SYSTEM : System Description

INFOID:0000000012197671

INPUT/OUTPUT SIGNAL CHART

*1: CVT models
*2: M/T models
*3: ECM determines the start signal status by the signals of engine speed and battery voltage.

SYSTEM DESCRIPTION

Firing order: 1 - 3 - 4 - 2

JPBIA4921GB

Sensor

Input Signal to ECM

ECM func-

tion

Actuator

Crankshaft position sensor (POS)

Engine speed

Piston position

Ignition tim-
ing control

Ignition coil (with power tran-
sistor)

Camshaft position sensor (PHASE)

Mass air flow sensor

Amount of intake air

Engine coolant temperature sensor

Engine coolant temperature

Throttle position sensor

Throttle position

Accelerator pedal position sensor

Accelerator pedal position

Turbocharger boost sensor

Turbocharger boost

Intake air temperature sensor 2

Intake air temperature

Transmission range switch

Gear position

Park/neutral position (PNP) switch

Battery

Battery voltage

Knock sensor

Engine knocking condition

Combination meter

CAN commu-
nication

Vehicle speed signal

Revision: November 2015

2016 JUKE

SYSTEM

EC-57

< SYSTEM DESCRIPTION >

[MR FOR NISMO RS MODELS]

The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the

engine. The ignition timing data is stored in the ECM.

The ECM receives information such as the injection pulse width and camshaft position sensor (PHASE) sig-

nal. Computing this information, ignition signals are transmitted to the power transistor.

During the following conditions, the ignition timing is revised by the ECM according to the other data stored in

the ECM.

• At starting

• During warm-up

• At idle

• At low battery voltage

• During acceleration

The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed

within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not

operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.

The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.

INTAKE VALVE TIMING CONTROL
INTAKE VALVE TIMING CONTROL : System Diagram

INFOID:0000000012197672

INTAKE VALVE TIMING CONTROL : System Description

INFOID:0000000012197673

INPUT/OUTPUT SIGNAL CHART

JPBIA4760GB

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)

Engine speed and piston position

Intake valve tim-
ing control

Intake valve timing con-
trol solenoid valve

Camshaft position sensor (PHASE)

Engine oil temperature sensor

Engine oil temperature

Engine coolant temperature sensor

Engine coolant temperature

Combination meter

CAN commu-
nication

Vehicle speed

Revision: November 2015

2016 JUKE

EC-58

< SYSTEM DESCRIPTION >

[MR FOR NISMO RS MODELS]

SYSTEM

SYSTEM DESCRIPTION

This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake-

valve.

The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant-

temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing (IVT) control sole-

noid valve depending on driving status. This makes it possible to control the shut/open timing of the intake

valve to increase engine torque in low/mid speed range and output in high-speed range.

EXHAUST VALVE TIMING CONTROL
EXHAUST VALVE TIMING CONTROL : System Diagram

INFOID:0000000012197674

EXHAUST VALVE TIMING CONTROL : System Description

INFOID:0000000012197675

INPUT/OUTPUT SIGNAL CHART

JPBIA5034GB

JPBIA4761GB

Revision: November 2015

2016 JUKE

SYSTEM

EC-59

< SYSTEM DESCRIPTION >

[MR FOR NISMO RS MODELS]

SYSTEM DESCRIPTION

This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the exhaust

valve.

The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine oil tem-

perature. Then, the ECM sends ON/OFF pulse duty signals to the exhaust valve timing (EVT) control solenoid

valve depending on driving status. This makes it possible to control the shut/open timing of the exhaust valve

to increase engine torque and output in a range of high engine speed.

TURBOCHARGER BOOST CONTROL

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)

Engine speed and piston position

Exhaust valve
timing control

Exhaust valve timing control
solenoid valve

Camshaft position sensor (PHASE)

Engine oil temperature sensor

Engine oil temperature

Exhaust valve timing control position
sensor

Exhaust valve timing signal

Combination meter

CAN commu-
nication

Vehicle speed signal

JPBIA5035GB

Revision: November 2015

2016 JUKE

EC-60

< SYSTEM DESCRIPTION >

[MR FOR NISMO RS MODELS]

SYSTEM

TURBOCHARGER BOOST CONTROL : System Diagram

INFOID:0000000012197676

TURBOCHARGER BOOST CONTROL : System Description

INFOID:0000000012197677

INPUT/OUTPUT SIGNAL CHART

SYSTEM DESCRIPTION

Depending on driving conditions, the ECM performs ON/OFF duty control of the turbocharger boost control

solenoid valve and controls the boost by adjusting the pressure to the diaphragm of the boost control actuator.

When driving conditions demand an increase in boost, the ECM prolongs the ON time of the turbocharger

boost control solenoid valve and moves the boost control valve towards the closing direction by reducing the

pressure in the diaphragm of the boost control actuator. The emission gas to the turbine wheel is then

increased. When driving conditions demand a decrease in boost, the ECM shortens the ON time of the turbo-

charger boost control solenoid valve and moves the boost control valve towards the opening position by

increasing the pressure in the diaphragm of the boost control actuator. The emission bypassing to the turbine

wheel is then increased. Thus, by performing the most optimal boost control, the ECM improves engine output

and response.

NOTE:

The boost varies depending on the vehicle and driving conditions.

BOOST CONTROL ACTUATOR LINE DRAWING

JPBIA5244GB

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)

Engine speed

Turbocharger boost
control

Turbocharger boost control
solenoid valve

↓

Boost control actuator

Camshaft position sensor (PHASE)

Mass air flow sensor

Amount of intake air

Intake air temperature sensor 1

Intake air temperature

Engine coolant temperature sensor

Engine coolant temperature

Throttle position sensor

Throttle position

Accelerator pedal position sensor

Accelerator pedal position

Turbocharger boost sensor

Turbocharger boost

Intake air temperature sensor 2

Intake air temperature

Revision: November 2015

2016 JUKE

SYSTEM

EC-61

< SYSTEM DESCRIPTION >

[MR FOR NISMO RS MODELS]

ENGINE PROTECTION CONTROL AT LOW ENGINE OIL PRESSURE
ENGINE PROTECTION CONTROL AT LOW ENGINE OIL PRESSURE : System Dia-
gram

INFOID:0000000012197678

ENGINE PROTECTION CONTROL AT LOW ENGINE OIL PRESSURE : System De-
scription

INFOID:0000000012197679

INPUT/OUTPUT SIGNAL CHART

SYSTEM DESCRIPTION

• The engine protection control at low engine oil pressure warns the driver of a decrease in engine oil pres-

sure by the oil pressure warning lamp a before the engine becomes damaged.

• When detecting a decrease in engine oil pressure at an engine speed less than 1,000 rpm, ECM transmits

an oil pressure warning lamp signal to the combination meter.The combination meter turns ON the oil pres-

sure warning lamp, according to the signal.

Turbocharger

Boost control actuator

Turbocharger boost control solenoid
valve

Recirculation valve

Turbocharger boost sensor
(with intake air temperature sensor 2)

: Vehicle front

JPBIA4717ZZ

JPBIA4922GB

Sensor

Input signal to ECM

ECM function

Actuator

Engine oil pressure sensor

Engine pressure

Engine protection control
• Oil pressure warning lamp

signal

• FUel cut control

Combination meter
• Oil pressure warning lamp

Crankshaft position sensor
(POS)

Engine speed

Engine oil temperature sensor

Engine oil temperature

Revision: November 2015

2016 JUKE

EC-62

< SYSTEM DESCRIPTION >

[MR FOR NISMO RS MODELS]

SYSTEM

*: When detecting a normal engine oil pressure, ECM turns OFF the oil pressure warning lamp.

FUEL FILLER CAP WARNING SYSTEM
FUEL FILLER CAP WARNING SYSTEM : System Diagram

INFOID:0000000012197680

FUEL FILLER CAP WARNING SYSTEM : System Description

INFOID:0000000012197681

INPUT/OUTPUT SIGNAL CHART

Input

*: This signal is sent to the ECM via the CAN communication line.

Output

*: This signal is sent to the combination meter via the CAN communication line.

SYSTEM DESCRIPTION

The fuel filler cap warning system alerts the driver to the prevention of the fuel filler being left uncapped and

malfunction occurrences after refueling, by turning ON the fuel filler cap warning display on the combination

meter.

ECM judges a refueled state, based on a fuel level signal transmitted from the combination meter.

When a very small leak is detected through the EVAP leak diagnosis performed after judging the refueled

state, ECM transmits a fuel filler cap warning display signal (request for display ON) to the combination meter

via CAN communication.

When receiving the signal, the combination meter turns ON the fuel filler cap warning display.

CAUTION:

Check fuel filler cap installation condition when the fuel filler cap warning display turns ON.

Reset Operation

Decrease in engine oil

pressure

Engine speed

Combination meter

Oil pressure warning lamp

Detection

Less than 1,000 rpm

ON*

1,000 rpm or more

Unit/Sensor

Input signal to ECM

ECM function

EVAP control system pressure sensor

Pressure in purge line

Fuel filler cap warning control

Combination meter

Fuel level

Fuel filler cap warning reset signal

JSBIA0797GB

Unit

Output signal

Actuator

ECM

Fuel filler cap warning display signal

Combination meter

Revision: November 2015

2016 JUKE

Content .. 153 154 155 156 ..