NISSAN NOTE 2016 Service Repair Manual

EC-24
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COMPONENT PARTS
Heated Oxygen Sensor 2
INFOID:0000000012431289
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 cont rolled 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 ox ygen sensor 2 is not used for
engine control operation.
Heated Oxygen Sensor 2 HeaterINFOID:0000000012431290
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxy gen sensor 2 heater corresponding to the engine speed,
amount of intake air and engine coolant temperature.
OPERATION
Ignition Coil With Power TransistorINFOID:0000000012431291
The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns
ON and OFF the ignition coil primary circuit. This ON/O FF operation induces the proper high voltage in the coil
secondary circuit.
Intake Air Temperature SensorINFOID:0000000012431292
The intake air temperature sensor is built-into mass air flow sensor
(1). The sensor detects intake air temperature 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.
SEF327R
Sensor Input signal to ECM ECM function Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS) Engine speed
Heated oxygen sensor 2
heater controlHeated oxygen sensor 2 heater
Engine coolant temperature sensor Engine coolant temperature
Mass air flow sensor Amount of intake air
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 ON
PBIA9559J
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COMPONENT PARTSEC-25
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*: These data are reference values and are measured between ECM terminals.
Intake Valve Timing Control Solenoid ValveINFOID:0000000012431293
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.
Knock SensorINFOID:0000000012431294
The knock sensor is attached to t
he cylinder block. It senses engine
knocking using a piezoelectric el ement. 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.
Battery Current Sensor (With Battery Temperature Sensor)INFOID:0000000012431295
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 contro l 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, "
System Description".
CAUTION:
Never connect the electrical co mponent or the ground wire
directly to the battery terminal. The connection cau ses the malfunction of the power generation volt-
age 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.
Intake air temperature [ °C ( °F)] Voltage* (V) Resistance (k Ω)
25 (77) 3.31.800 - 2.200
80 (176) 1.20.283 - 0.359
SEF012P
PBIB1842E
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JPBIA3262ZZ
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EC-26
< SYSTEM DESCRIPTION >[HR16DE]
COMPONENT PARTS
BATTERY TEMPERATURE SENSOR
Battery temperature sensor is int
egrated in battery current sensor.
The sensor measures temperature around the battery.
The electrical resistance of the t hermistor decreases as temperature
increases.

*: These data are reference values and are measured between battery temperature
sensor signal terminal and sensor ground.
Malfunction Indicator Lamp (MIL)INFOID:0000000012431296
The 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 MIL remains
ON or continues blinking, the on board diagnostic system detects a
DTC(s) that affects exhaust gas.
For details, refer to EC-57, "
DIAGNOSIS DESCRIPTION : Malfunc-
tion Indicator Lamp (MIL)".
Mass Air Flow SensorINFOID:0000000012431297
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.
Oil Pressure Warning LampINFOID:0000000012431298
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.
For details, refer to EC-43, "
ENGINE PROTECTION CONTROL AT
LOW ENGINE OIL PRESSURE : System Description".
Temperature [°C ( °F)]
Vo l ta g e* (V) Resistance (k
Ω)
25 (77) 3.3331.9 - 2.1
90 (194) 0.9690.222 - 0.258
SEF012P
SAT652J
PBIA9559J
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COMPONENT PARTSEC-27
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Refrigerant Pressure SensorINFOID:0000000012431299
The refrigerant pressure sensor is installed at the c
ondenser 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 & ASCD Brake SwitchINFOID:0000000012431300
Stop lamp switch and ASCD brake switch are installed to brake pedal bracket.
ECM detects the state of the brake pedal by those two types of input (ON/OFF signal).
Throttle Control MotorINFOID:0000000012431301
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feed-
back to the ECM to control the throttle valve in response to driving conditions via the throttle control motor.
Throttle Control Motor RelayINFOID:0000000012431302
Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle
control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends
an ON signal to throttle control motor relay and batte ry voltage is provided to the ECM. When the ignition
switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not
provided to the ECM.
Throttle Position SensorINFOID:0000000012431303
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometer which transform the throttle valve position into
output voltage, and emit the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and controls the throttle valve in response to driving conditions
via the throttle control motor.
ASCD Steering SwitchINFOID:0000000012431304
ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation
of switch, and determines which button is operated.
PBIB2657E
Brake pedal ASCD brake switch Stop lamp switch
Released ONOFF
Depressed OFFON
PBIB0145E
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EC-28
< SYSTEM DESCRIPTION >[HR16DE]
STRUCTURE AND OPERATION
STRUCTURE AND OPERATION
Positive Crankcase VentilationINFOID:0000000012431305
This system returns blow-by gas to the intake manifold.
The positive crankcase ventilation (PCV) valve is prov
ided to conduct crankcase blow-by gas to the intake
manifold.
During partial throttle operation of the engine, the in take 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 in sufficient 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.
PBIB2962E
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STRUCTURE AND OPERATIONEC-29
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On Board Refueling Vapor Recovery (ORVR)INFOID:0000000012431306
From the beginning of refueling, the air and vapor insi
de the fuel tank go through refueling EVAP vapor cut
valve and EVAP/ORVR line to the EVAP canister. The v apor 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 inspectio ns below, be sure to observe the following:
• Put a “CAUTION: FLAMMABL E” 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
2 fire extinguisher.
CAUTION:
• Before removing fuel line parts, carry out the following procedures:
- Put drained fuel in an explosion-proof containe r and put lid on securely.
- Release fuel pressure from fuel line. Refer to EC-137, "
Work Procedure".
- Disconnect battery ground cable.
• Always replace O-ring when the fu el 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
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EC-30
< SYSTEM DESCRIPTION >[HR16DE]
SYSTEM
SYSTEM
ENGINE CONTROL SYSTEM
ENGINE CONTROL SYSTEM : System DiagramINFOID:0000000012431307
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SYSTEMEC-31
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ENGINE CONTROL SYSTEM : System DescriptionINFOID:0000000012431308
ECM performs various controls such as fuel
injection control and ignition timing control.
MULTIPORT FUEL INJECTION SYSTEM
Function Reference
Multiport fuel injection system EC-32, "
MULTIPORT FUEL INJECTION SYSTEM : System De-
scription"
Electric ignition system
EC-35, "ELECTRIC IGNITION SYSTEM : System Description"
Air conditioning cut controlEC-37, "AIR CONDITIONING CUT CONTROL : System Descrip-
tion"
CAN communication
EC-38, "CAN COMMUNICATION : System Description"
Cooling fan control EC-38, "COOLING FAN CONTROL : System Description"
Evaporative emission systemEC-40, "EVAPORATIVE EMISSION SYSTEM : System Descrip-
tion"
Intake valve timing control
EC-41, "INTAKE VALVE TIMING CONTROL : System Description"
Exhaust valve timing control EC-42, "EXHAUST VALVE TIMING CO
NTROL : System Descrip-
tion"
Engine protection control at low engine oil pressure EC-43, "ENGINE PROTECTION CONTROL AT LOW ENGINE
OIL PRESSURE : System Description"
Fuel filler cap warning systemEC-44, "FUEL FILLER CAP WARNING SYSTEM : System De-
scription"
Automatic speed control device (ASCD)
EC-45, "AUTOMATIC SPEED CONTROL DEVICE (ASCD) : Sys-
tem Description"
Active grille shutter systemEXT-11, "ACTIVE GRILLE SHUTTER SYSTEM : System Descrip-
tion"
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EC-32
< SYSTEM DESCRIPTION >[HR16DE]
SYSTEM
MULTIPORT FUEL INJECTION SYSTEM : System Diagram
INFOID:0000000012431309
MULTIPORT FUEL INJECTION SY STEM : System DescriptionINFOID:0000000012431310
INPUT/OUTPUT SIGNAL CHART
JPBIA4882GB
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SYSTEMEC-33
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*1: M/T models
*2: CVT models
*3: This sensor is not used to contro
l the engine system under normal conditions.
*4: ECM determines the start signal status by the signals of engine speed and battery voltage.
*5: This signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). T he amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined
by input signals (for engine speed and intake air) from the crankshaft position sensor, camshaft position sen-
sor and the mass air flow sensor.
VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION
In addition, the amount of fuel injected is compensated to improve engine performance under various operat-
ing conditions as listed below.

• During warm-up
• When starting the engine
• During acceleration
• Hot-engine operation
• When selector lever position is changed from N to D (CVT models)
• High-load, high-speed operation
• During deceleration
• During high engine speed operation
Sensor Input signal to ECM ECM functionActuator
Crankshaft position sensor (POS) Engine speed
*4
Piston position
Fuel injection & mixture
ratio controlFuel injector
Camshaft position sensor (PHASE)
Mass air flow sensor
Amount of intake air
Intake air temperature sensor Intake air temperature
Engine coolant temperature sensor Engine coolant temperature
Air fuel ratio (A/F) sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch
*1
PNP signal
Transmission range switch*2
Battery Battery voltage*4
Knock sensor Engine knocking condition
Heated oxygen sensor 2
*3Density of oxygen in exhaust gas
EPS control unit EPS operation signal
*5
Combination meter
Vehicle speed*5
BCMA/C ON signal*5
Blower fan signal*5
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2016 Versa Note

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