Nissan Versa Note. Manual - part 259

EC-18

< SYSTEM DESCRIPTION >

[HR16DE]

COMPONENT PARTS

Accelerator Pedal Position Sensor

INFOID:0000000009020573

The accelerator pedal position sensor is installed on the upper end

of the accelerator pedal assembly. The sensor detects the accelera-

tor position and sends a signal to the ECM.

Accelerator pedal position sensor has two sensors. These sensors

are a kind of potentiometer which transform the accelerator pedal

position into output voltage, and emit the voltage signals to the ECM.

The ECM judges the current opening angle of the accelerator pedal

from these signals and controls the throttle control motor based on

these signals.

Idle position of the accelerator pedal is determined by the ECM

receiving the signal from the accelerator pedal position sensor. The

ECM uses this signal for the engine operation such as fuel cut.

Engine oil pressure sensor

EC-21, "Engine Oil Pressure Sensor"

Engine oil temperature sensor

EC-21, "Engine Oil Temperature Sensor"

EVAP canister purge volume control solenoid valve

EC-22, "EVAP Canister Purge Volume Control Solenoid Valve"

EVAP canister vent control valve

EC-22, "EVAP Canister Vent Control Valve"

EVAP control system pressure sensor

EC-22, "EVAP Control System Pressure Sensor"

Exhaust valve timing control position sensor

EC-19, "Camshaft Position Sensor"

Exhaust valve timing control solenoid valve

EC-23, "Exhaust Valve Timing Control Solenoid Valve"

Fuel injector

EC-23, "Fuel Injector"

Fuel pump

EC-23, "Fuel Pump"

Heated oxygen sensor 2

EC-24, "Heated Oxygen Sensor 2"

Heated oxygen sensor 2 heater

EC-24, "Heated Oxygen Sensor 2 Heater"

Ignition coil (with power transistor)

EC-24, "Ignition Coil With Power Transistor"

Intake air temperature sensor

EC-24, "Intake Air Temperature Sensor"

Camshaft position sensor

EC-19, "Camshaft Position Sensor"

Intake valve timing control solenoid valve

EC-25, "Intake Valve Timing Control Solenoid Valve"

Knock sensor

EC-25, "Knock Sensor"

Mass air flow sensor

EC-26, "Mass Air Flow Sensor"

PCV valve

EC-28, "Positive Crankcase Ventilation"

Refrigerant pressure sensor

EC-27, "Refrigerant Pressure Sensor"

Stop lamp switch

EC-27, "Stop Lamp Switch & ASCD Brake Switch"

Throttle control motor

EC-27, "Throttle Control Motor"

Throttle control motor relay

EC-27, "Throttle Control Motor Relay"

Throttle position sensor

EC-27, "Throttle Position Sensor"

ASCD steering switch

EC-27, "ASCD Steering Switch"

ASCD brake switch

EC-27, "Stop Lamp Switch & ASCD Brake Switch"

Clutch pedal position switch

EC-20, "Clutch Pedal Position Switch"

Active grille shutter

EXT-10, "ACTIVE GRILLE SHUTTER SYSTEM : Active grille shutter"

Component

Reference

PBIB1741E

COMPONENT PARTS

EC-19

< SYSTEM DESCRIPTION >

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Air Fuel Ratio Sensor 1

INFOID:0000000009020574

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:0000000009020575

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.

Camshaft Position Sensor

INFOID:0000000009020576

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. 

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

PBIA9209J

EC-20

< SYSTEM DESCRIPTION >

[HR16DE]

COMPONENT PARTS

ECM receives the signals as shown in the figure.

Clutch Pedal Position Switch

INFOID:0000000009762888

When the clutch pedal is depressed, the clutch pedal position switch turns OFF 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:0000000009020577

Cooling fan operates at low and high speed when the current flows in the cooling fan motor.

Refer to 

EC-38, "COOLING FAN CONTROL : System Description"

 for cooling fan operation.

Crankshaft Position Sensor

INFOID:0000000009020578

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.

ECM

INFOID:0000000009020579

The ECM consists of a microcomputer and connectors for signal

input and output and for power supply. The ECM controls the engine.

JPBIA4880GB

PBIA9209J

JPBIA4880GB

PBIA9222J

COMPONENT PARTS

EC-21

< SYSTEM DESCRIPTION >

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Electric Throttle Control Actuator

INFOID:0000000009020580

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:0000000009020581

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:0000000009020582

The engine oil pressure (EOP) sensor is detects engine oil pressure

and transmits a voltage signal to the ECM.

Engine Oil Temperature Sensor

INFOID:0000000009020583

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.

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

SEF594K