Nissan Cube. Manual — part 299

EC-82

< SYSTEM DESCRIPTION >

[MR18DE]

EVAPORATIVE EMISSION SYSTEM

EVAPORATIVE EMISSION SYSTEM

System Diagram

INFOID:0000000009947219

System Description

INFOID:0000000009947220

INPUT/OUTPUT SIGNAL CHART

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

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

JMBIA2944GB

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed*

1

EVAP canister
purge flow control

EVAP canister purge vol-
ume control solenoid valve

Mass air flow sensor

Amount of intake air

Engine coolant temperature sensor

Engine coolant temperature

Battery

Battery voltage*

1

Throttle position sensor

Throttle position

Accelerator pedal position sensor

Accelerator pedal position

Air fuel ratio (A/F) sensor 1

Density of oxygen in exhaust gas
(Mixture ratio feedback signal)

Fuel tank temperature sensor

Fuel temperature in fuel tank

EVAP control system pressure sensor

Pressure in purge line

ABS actuator and electric unit (control unit)

Vehicle speed*

2

EVAPORATIVE EMISSION SYSTEM

EC-83

< SYSTEM DESCRIPTION >

[MR18DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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.

EVAPORATIVE EMISSION LINE DRAWING

PBIB3639E

EC-84

< SYSTEM DESCRIPTION >

[MR18DE]

EVAPORATIVE EMISSION SYSTEM

1.

Intake manifold collector

2.

EVAP canister purge volume control
solenoid valve

3.

EVAP service port

4.

EVAP purge resonator

Vehicle front

From next figure

PBIB3330E

EVAPORATIVE EMISSION SYSTEM

EC-85

< SYSTEM DESCRIPTION >

[MR18DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

NOTE:
Do not use soapy water or any type of solvent while installing vacuum hose or purge hoses.

1.

EVAP control system pressure sensor 2.

EVAP canister

3.

EVAP canister vent control valve

4.

Drain filter

A.

To previous figure

JMBIA2318ZZ