Nissan Note E12. Manual - part 174

SYSTEM

EC-35

< SYSTEM DESCRIPTION >

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COOLING FAN CONTROL : System Description

INFOID:0000000009022455

SYSTEM DIAGRAM

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

SYSTEM DESCRIPTION

ECM controls cooling fan speed corresponding to vehicle speed, engine coolant temperature, refrigerant pres-

sure, air conditioner ON signal. Then control system has 3-step control [HIGH/LOW/OFF].

Cooling Fan Operation

Cooling Fan Relay Operation

The ECM controls cooling fan relays through CAN communication line.

EVAPORATIVE EMISSION SYSTEM

JSBIA3078GB

PBIB2483E

Cooling fan speed

Cooling fan relay

1

2

3

Stop (OFF)

OFF

OFF

OFF

Low (LOW)

ON

OFF

OFF

High (HI)

ON

ON

ON

EC-36

< SYSTEM DESCRIPTION >

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SYSTEM

EVAPORATIVE EMISSION SYSTEM : System Description

INFOID:0000000009022456

SYSTEM DIAGRAM

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

SYSTEM DESCRIPTION

The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel

system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister.

The fuel vapor in the sealed fuel tank is led into the EVAP canister which contains activated carbon and the

vapor is stored there when the engine is not operating or when refueling to the fuel tank.

The vapor in the EVAP canister is purged by the air through the purge line to the intake manifold when the

engine is operating. EVAP canister purge volume control solenoid valve is controlled by ECM. When the

engine operates, the flow rate of vapor controlled by EVAP canister purge volume control solenoid valve is

proportionally regulated as the air flow increases.

EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating and

idling.

INTAKE VALVE TIMING CONTROL

JSBIA0114GB

PBIB3039E

SYSTEM

EC-37

< SYSTEM DESCRIPTION >

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INTAKE VALVE TIMING CONTROL : System Description

INFOID:0000000009022457

SYSTEM DIAGRAM

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

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

JSBIA3079GB

JPBIA4884GB

EC-38

< SYSTEM DESCRIPTION >

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SYSTEM

EXHAUST VALVE TIMING CONTROL : System Description

INFOID:0000000009022458

SYSTEM DIAGRAM

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

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 and engine oil tem-

perature. 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 De-

JSBIA3080GB

JPBIA4886GB