Nissan Versa Sedan. Manual — part 255
COMPONENT PARTS
EC-19
< SYSTEM DESCRIPTION >
[HR16DE]
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Air Fuel Ratio Sensor 1
INFOID:0000000009266955
The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is composed an elec-
trode layer, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.
Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of about 800
°C
(1,472
°F).
Air Fuel Ratio Sensor 1 Heater
INFOID:0000000009266956
SYSTEM DESCRIPTION
The ECM performs ON/OFF duty control of the A/F sensor 1 heater corresponding to the engine operating
condition to keep the temperature of A/F sensor 1 element within the specified range.
Battery Current Sensor
INFOID:0000000009496745
The battery current sensor is installed to the battery cable at the neg-
ative terminal. The sensor measures the charging/discharging cur-
rent of the battery.
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 control 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.
CAUTION:
Never connect the electrical component or the ground wire directly to the battery terminal. The con-
nection causes the malfunction of the power generation voltage variable control, and then the battery
discharge may occur.
JMBIA0112GB
PBIB3354E
Sensor
Input Signal to ECM
ECM function
Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)
Engine speed
Air fuel ratio (A/F) sensor 1
heater control
Air fuel ratio (A/F) sensor 1
heater
Mass air flow sensor
Amount of intake air
JPBIA3262ZZ
EC-20
< SYSTEM DESCRIPTION >
[HR16DE]
COMPONENT PARTS
Camshaft Position Sensor
INFOID:0000000009266957
The camshaft position sensor senses the protrusion of camshaft to
identify a particular cylinder. The camshaft position sensor senses
the piston position.
When the crankshaft position sensor system becomes inoperative,
the camshaft position sensor provides various controls 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.
Clutch Pedal Position Switch
INFOID:0000000009614049
When the clutch pedal is depressed, the clutch pedal position switch turns ON and the clutch pedal position
switch signal is sent to the ECM. The ECM judges the clutch pedal conditions via the signal (ON or OFF).
Cooling Fan
INFOID:0000000009266958
Cooling fan operates at low and high speed when the current flows in the cooling fan motor.
EC-39, "COOLING FAN CONTROL : System Description"
Crankshaft Position Sensor
INFOID:0000000009266959
The crankshaft position sensor is located on the cylinder block rear
housing facing the gear teeth (cogs) of the signal plate at end of the
crankshaft. 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.
PBIA9209J
JPBIA4880GB
PBIA9209J
JPBIA4880GB
COMPONENT PARTS
EC-21
< SYSTEM DESCRIPTION >
[HR16DE]
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ECM
INFOID:0000000009266960
The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The ECM controls the engine.
Electric Throttle Control Actuator
INFOID:0000000009266961
Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc.
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.
Engine Coolant Temperature Sensor
INFOID:0000000009266962
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.
Engine Oil Pressure Sensor
INFOID:0000000009266963
The engine oil pressure (EOP) sensor is detects engine oil pressure
and transmits a voltage signal to the ECM.
PBIA9222J
SEF594K
Engine coolant temperature [
°C (°F)]
Voltage* (V)
Resistance (k
Ω)
–10 (14)
4.4
7.0 - 11.4
20 (68)
3.5
2.10 - 2.90
50 (122)
2.2
0.68 - 1.00
90 (194)
0.9
0.236 - 0.260
SEF012P
JSBIA0292ZZ
EC-22
< SYSTEM DESCRIPTION >
[HR16DE]
COMPONENT PARTS
Engine Oil Temperature Sensor
INFOID:0000000009266964
The engine oil temperature sensor is used to detect the engine oil
temperature. The sensor modifies a voltage signal from the ECM.
The modified signal returns to the ECM as the engine oil tempera-
ture input. The sensor uses a thermistor which is sensitive to the
change in temperature. The electrical resistance of the thermistor
decreases as temperature increases.
<Reference data>
*: These data are reference values and are measured between ECM terminals.
EVAP Canister Purge Volume Control Solenoid Valve
INFOID:0000000009266965
The EVAP canister purge volume control solenoid valve uses a ON/
OFF duty to control the flow rate of fuel vapor from the EVAP canis-
ter. The EVAP canister purge volume control solenoid valve is
moved by ON/OFF pulses from the ECM. The longer the ON pulse,
the greater the amount of fuel vapor that will flow through the valve.
EVAP Canister Vent Control Valve
INFOID:0000000009266966
The EVAP canister vent control valve is located on the EVAP canis-
ter and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal
the vent is necessary for the on board diagnosis of other evaporative
emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the evapo-
rative emission control system is depressurized and allows “EVAP
Control System” diagnosis.
SEF594K
Engine oil temperature [
°C (°F)]
Voltage
*
(V)
Resistance (k
Ω)
–10 (14)
4.4
7.0 - 11.4
20 (68)
3.5
2.10 - 2.90
50 (122)
2.2
0.68 - 1.00
90 (194)
0.9
0.236 - 0.260
110 (230)
0.6
0.143 - 0.153
SEF012P
JSBIA0651ZZ
PBIB1263E
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