Nissan Qashqai (2007-2010). Manual — part 379

EVAPORATIVE EMISSION SYSTEM

EC-1035

< FUNCTION DIAGNOSIS >

[MR20DE (WITHOUT EURO-OBD)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

*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

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.

Component Parts Location

INFOID:0000000001115788

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

Heated oxygen sensor 1

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

Fuel tank temperature sensor

Fuel temperature in fuel tank

Wheel sensor*

2

Vehicle speed

EC-1036

< FUNCTION DIAGNOSIS >

[MR20DE (WITHOUT EURO-OBD)]

EVAPORATIVE EMISSION SYSTEM

1.

Ignition coil (with power transistor)
and spark plug

2.

PCV valve

3.

Refrigerant pressure sensor

4.

Fuel injector

5.

Knock sensor

6.

Cooling fan motor

7.

Camshaft position sensor (PHASE)

8.

Engine coolant temperature sensor

9.

IPDM E/R

10. ECM

11.

Mass air flow sensor (with intake
temperature sensor)

12. Electric throttle control actuator

(with built in throttle position sensor
and throttle control motor)

13. EVAP canister purge volume control

solenoid valve

1.

ECM

2.

IPDM E/R

3.

Fuel pump fuse (15A)

JMBIA0338ZZ

JMBIA0340ZZ

EVAPORATIVE EMISSION SYSTEM

EC-1037

< FUNCTION DIAGNOSIS >

[MR20DE (WITHOUT EURO-OBD)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

1.

Electric throttle control actuator
(with built-in position sensor, throttle
control motor)

2.

Throttle valve

1.

EVAP canister purge volume control
solenoid valve

2.

Mass air flow sensor
(with intake air temperature sensor)

1.

Camshaft position sensor

2.

Engine coolant temperature sensor

JMBIA0341ZZ

JMBIA0342ZZ

JMBIA0343ZZ

EC-1038

< FUNCTION DIAGNOSIS >

[MR20DE (WITHOUT EURO-OBD)]

EVAPORATIVE EMISSION SYSTEM

PBIB2942E

1.

Heated oxygen sensor 1 harness
connector

2.

Heated oxygen sensor 1

3.

Heated oxygen sensor 2

4.

Heated oxygen sensor 2 harness
connector

1.

PCV valve

2.

Ignition coil (with power transistor)
and spark plug

3.

Fuel injection

JMBIA0454ZZ

JMBIA0344ZZ

JMBIA0345ZZ