Nissan Juke F15. Manual — part 306
COMPONENT PARTS
EC-37
< SYSTEM DESCRIPTION >
[MR FOR NISMO RS MODELS]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Mass Air Flow Sensor (With Intake Air Temperature Sensor 1)
INFOID:0000000012197636
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:0000000012197637
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
EC-38
< SYSTEM DESCRIPTION >
[MR FOR NISMO RS MODELS]
COMPONENT PARTS
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:0000000012197638
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.
A.
From boost pipe
B.
To boost control actuator
C.
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
COMPONENT PARTS
EC-39
< SYSTEM DESCRIPTION >
[MR FOR NISMO RS MODELS]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Engine Coolant Temperature Sensor
INFOID:0000000012197639
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:0000000012197640
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
JPBIA4617ZZ
JMBIA0714GB
EC-40
< SYSTEM DESCRIPTION >
[MR FOR NISMO RS MODELS]
COMPONENT PARTS
Camshaft Position Sensor (PHASE)
INFOID:0000000012197641
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:0000000012197642
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:0000000012197643
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.
JPBIA4621ZZ
JMBIA0714GB
PBIB1842E
JPBIA4622ZZ
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