Infiniti M35/M45 Y50. Manual — part 567
EVAPORATIVE EMISSION SYSTEM
EC-741
[VK45DE]
C
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EC
EVAPORATIVE EMISSION SYSTEM
PFP:14950
Description
NBS0059R
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.
PBIB1631E
EC-742
[VK45DE]
EVAPORATIVE EMISSION SYSTEM
EVAPORATIVE EMISSION LINE DRAWING
: Vehicle front
: From next page
1.
Intake manifold collector
2.
EVAP canister purge volume control
solenoid valve
3.
EVAP service port
NOTE:
Do not use soapy water or any type of solvent while installing vacuum hose or purge hoses.
PBIB2726E
EVAPORATIVE EMISSION SYSTEM
EC-743
[VK45DE]
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EC
: Vehicle front
: To previous page
1.
EVAP canister vent control valve
2.
EVAP canister
3.
EVAP control system pressure sensor
NOTE:
Do not use soapy water or any type of solvent while installing vacuum hose or purge hoses.
PBIB2727E
EC-744
[VK45DE]
EVAPORATIVE EMISSION SYSTEM
Component Inspection
NBS0059S
EVAP CANISTER
Check EVAP canister as follows:
1.
Block port (B).
2.
Blow air into port (A) and check that it flows freely out of port (C).
3.
Release blocked port (B).
4.
Apply vacuum pressure to port (B) and check that vacuum pres-
sure exists at the ports (A) and (C).
5.
Block port (A) and (B).
6.
Apply pressure to port (C) and check that there is no leakage.
FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FULLER CAP)
1.
Wipe clean valve housing.
2.
Check valve opening pressure and vacuum.
3.
If out of specification, replace fuel filler cap as an assembly.
CAUTION:
Use only a genuine fuel filler cap as a replacement. If an incor-
rect fuel filler cap is used, the MIL may come on.
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to
.
FUEL TANK TEMPERATURE SENSOR
Refer to
EVAP CANISTER VENT CONTROL VALVE
Refer to
.
EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to
.
PBIB2728E
SEF445Y
Pressure:
15.3 - 20.0 kPa (0.156 - 0.204 kg/cm
2
, 2.22
- 2.90 psi)
Vacuum:
−
6.0 to
−
3.3 kPa (
−
0.061 to
−
0.034 kg/cm
2
,
−
0.87 to
−
0.48 psi)
SEF943S
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