Nissan Juke F15. Manual — part 455
SYSTEM
EC-633
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
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“Long-term fuel trim” is overall fuel compensation carried out over time to compensate for continual deviation
of the “short-term fuel trim” from the central value. Continual deviation will occur due to individual engine differ-
ences, wear over time and changes in the usage environment.
FUEL INJECTION TIMING
Sequential Direct Injection Gasoline System
Fuel is injected into each cylinder during each engine cycle accord-
ing to the ignition order.
STRATIFIED-CHARGE START CONTROL
The use of the stratified-charge combustion method enables emissions-reduction when starting the engine
with engine coolant temperature between 5
°C (41°F) and 40°C (104°F).
FUEL SHUT-OFF
Fuel to each cylinder is shut-off during deceleration, operation of the engine at excessively high speed or oper-
ation of the vehicle at excessively high speed.
FUEL PRESSURE CONTROL
FUEL PRESSURE CONTROL : System Diagram
INFOID:0000000012198203
FUEL PRESSURE CONTROL : System Description
INFOID:0000000012198204
INPUT/OUTPUT SIGNAL CHART
JPBIA4704GB
JPBIA4920GB
EC-634
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
SYSTEM
*: 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.
ENGINE OIL PRESSURE CONTROL 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
SYSTEM
EC-635
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
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ENGINE OIL PRESSURE CONTROL SYSTEM : System Description
INFOID:0000000012198205
SYSTEM DIAGRAM
SYSTEM DESCRIPTION
ECM performs the variable hydraulic control (low oil pressure control and high oil pressure control) based on
signals from each sensor according to oil temperature and engine load. ECM activates the engine oil pressure
control solenoid valve and switches to the low oil pressure control and high oil pressure control. ECM uses the
low oil pressure control for 80-90 % of the operating area to maintain low oil pressure and stops piston cooling
jet (i.e. achievement of less than or equal to jet injection valve opening pressure).
High oil pressure control start condition
• High oil pressure control start condition
• High engine speed
• Coolant temperature is 60
°C (140°F)or more under high engine load condition
Low oil pressure control start condition
• Coolant temperature is less than 60
°C (140°F) under low engine speed condition
• Coolant temperature is 60
°C (140°F) or more under low engine load and low engine speed conditions
ELECTRIC IGNITION SYSTEM
JSBIA5493GB
EC-636
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
SYSTEM
ELECTRIC IGNITION SYSTEM : System Diagram
INFOID:0000000012198206
ELECTRIC IGNITION SYSTEM : System Description
INFOID:0000000012198207
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
*3
Knock sensor
Engine knocking condition
Combination meter
CAN commu-
nication
Vehicle speed signal
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