Nissan Juke (2016 year). Service Repair Manual — part 155
SYSTEM
EC-55
< SYSTEM DESCRIPTION >
[MR FOR NISMO RS MODELS]
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*: 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
*3
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
*1
Gear position
Park/neutral position (PNP) switch
*2
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]
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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]
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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]
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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.
1.
Turbocharger
2.
Boost control actuator
3.
Turbocharger boost control solenoid
valve
4.
Recirculation valve
5.
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
ON
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
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