Nissan Versa Note. Manual - part 265

EC-42

< SYSTEM DESCRIPTION >

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SYSTEM

*1: ECM determines the start signal status by the signals of engine speed and battery voltage.

*2: This signal is sent to the ECM through CAN communication line.

SYSTEM DESCRIPTION

This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake

valve.

The ECM receives signals such as crankshaft position, camshaft position, engine speed, engine oil tempera-

ture and engine coolant temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve

timing (IVT) control solenoid valve depending on driving status. This makes it possible to control the shut/open

timing of the intake valve to increase engine torque in low/mid speed range and output in high-speed range.

EXHAUST VALVE TIMING CONTROL
EXHAUST VALVE TIMING CONTROL : System Diagram

INFOID:0000000009020622

EXHAUST VALVE TIMING CONTROL : System Description

INFOID:0000000009020623

INPUT/OUTPUT SIGNAL CHART

JPBIA4884GB

JPBIA4885GB

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)

Engine speed

*1

Piston position

Exhaust valve timing control

Exhaust valve timing control 
solenoid valve

Camshaft position sensor (PHASE)

Engine oil temperature sensor

Engine oil temperature

Engine coolant temperature sensor

Engine coolant temperature

Combination meter

Vehicle speed

*2

SYSTEM

EC-43

< SYSTEM DESCRIPTION >

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*1: ECM determines the start signal status by the signals of engine speed and battery voltage.

*2: This signal is sent to the ECM through CAN communication line.

SYSTEM DESCRIPTION

This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the exhaust

valve.

The ECM receives signals such as crankshaft position, camshaft position, engine speed, engine oil tempera-

ture and engine coolant temperature. Then, the ECM sends ON/OFF pulse duty signals to the exhaust valve

timing (EVT) control solenoid valve depending on driving status. This makes it possible to control the shut/

open timing of the exhaust valve to increase engine torque and output in a range of high engine speed.

ENGINE PROTECTION CONTROL AT LOW ENGINE OIL PRESSURE
ENGINE PROTECTION CONTROL AT LOW ENGINE OIL PRESSURE : System Dia-
gram

INFOID:0000000009020624

ENGINE PROTECTION CONTROL AT LOW ENGINE OIL PRESSURE : System De-
scription

INFOID:0000000009020625

INPUT/OUTPUT SIGNAL CHART

SYSTEM DESCRIPTION

• The engine protection control at low engine oil pressure warns the driver of a decrease in engine oil pres-

sure by the oil pressure warning lamp a before the engine becomes damaged.

• When detecting a decrease in engine oil pressure at an engine speed less than 1,000 rpm, ECM transmits

an oil pressure warning lamp signal to the combination meter. The combination meter turns ON the oil pres-

sure warning lamp, according to the signal.

JPBIA4886GB

JSBIA0704GB

Sensor

Input signal to ECM

ECM function

Actuator

Engine oil pressure sensor

Engine pressure

Engine protection control
• Oil pressure warning lamp signal

Combination meter
• Oil pressure warning lamp

Crankshaft position sensor (POS) Engine speed

EC-44

< SYSTEM DESCRIPTION >

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SYSTEM

*: When detecting a normal engine oil pressure, ECM turns OFF the oil pressure warning lamp.

FUEL FILLER CAP WARNING SYSTEM
FUEL FILLER CAP WARNING SYSTEM : System Diagram

INFOID:0000000009020626

FUEL FILLER CAP WARNING SYSTEM : System Description

INFOID:0000000009020627

INPUT/OUTPUT SIGNAL CHART

Input

*: This signal is sent to the ECM via the CAN communication line.

Output

*: This signal is sent to the combination meter via the CAN communication line.

SYSTEM DESCRIPTION

The fuel filler cap warning system alerts the driver to the prevention of the fuel filler being left uncapped and

malfunction occurrences after refueling, by turning ON the fuel filler cap warning display on the combination

meter.

ECM judges a refueled state, based on a fuel level signal transmitted from the combination meter.

When a very small leak is detected through the EVAP leak diagnosis performed after judging the refueled

state, ECM transmits a fuel filler cap warning display signal (request for display ON) to the combination meter

via CAN communication. 

When receiving the signal, the combination meter turns ON the fuel filler cap warning display.

CAUTION:

Check fuel filler cap installation condition when the fuel filler cap warning display turns ON.

Reset Operation

Decrease in engine 

oil pressure

Engine speed

Combination meter

Oil pressure warning lamp

Detection

Less than 1,000 rpm

ON*

1,000 rpm or more

ON

Unit/Sensor

Input signal to ECM

ECM function

EVAP control system pressure sensor

Pressure in purge line

Fuel filler cap warning control

Combination meter

Fuel level

Fuel filler cap warning reset signal

*

JSBIA0797GB

Unit

Output signal

Actuator

ECM

Fuel filler cap warning display signal

*

Combination meter

SYSTEM

EC-45

< SYSTEM DESCRIPTION >

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The fuel filler cap warning lamp tunes OFF, according to any condition listed below:

• Reset operation is performed by operating the meter control switch on the combination meter. Refer to 

MWI-

13, "Switch Name and Function"

.

- When the reset operation is performed, the combination meter transmits a fuel filler cap warning reset signal

to ECM via CAN communication. ECM transmits a fuel filler cap warning display signal (request for display

OFF) to the combination meter via CAN communication. When receiving the signal, the combination meter

turns OFF the fuel filler cap warning display.

• EVAP leak diagnosis result is normal.

• Fuel refilled.

• DTC erased by using CONSULT.

NOTE:

MIL turns ON if a malfunction is detected in leak diagnosis results again at the trip after the fuel filler cap warn-

ing display turns ON/OFF.

AUTOMATIC SPEED CONTROL DEVICE (ASCD)
AUTOMATIC SPEED CONTROL DEVICE (ASCD) : System Diagram

INFOID:0000000009020628

AUTOMATIC SPEED CONTROL DEVICE (ASCD) : System Description

INFOID:0000000009020629

INPUT/OUTPUT SIGNAL CHART

*: This signal is sent to the ECM via the CAN communication line

BASIC ASCD SYSTEM

Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed

without depressing accelerator pedal. Driver can be set the vehicle speed in the set speed range.

ECM controls throttle angle of electric throttle control actuator to regulate engine speed.

Operation status of ASCD is indicated in combination meter.

If any malfunction occurs in the ASCD system, it automatically deactivates the ASCD control.

JSBIA3607GB

Sensor

Input signal to ECM

ECM function

Actuator

ASCD steering switch

ASCD steering switch operation

ASCD vehicle speed control

Electric throttle control actuator

Brake pedal position switch

Brake pedal operation

Stop lamp switch

Clutch pedal position switch

Clutch pedal operation

Transmission range switch

Gear position

Park/neutral position (PNP) switch

PNP signal

Combination meter

Vehicle speed signal*

TCM

Output shaft revolution signal*