Nissan Note E12. Manual — part 174
SYSTEM
EC-35
< SYSTEM DESCRIPTION >
[HR16DE]
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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 >
[HR16DE]
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 >
[HR16DE]
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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 >
[HR16DE]
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
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