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SEF032W
SEF267X
Component Description
NHEC0228
The EVAP canister vent control valve is located on the EVAP can-
ister and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is ener-
gized. A plunger will then move to seal the canister vent. The abil-
ity to seal the vent is necessary for the on board diagnosis of other
evaporative emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the
evaporative emission control system is depressurized and allows
“EVAP Control System (Small Leak)” diagnosis.
CONSULT-II Reference Value in Data Monitor
Mode
NHEC0229
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
VENT CONT/V I Ignition switch: ON OFF
On Board Diagnosis Logic
NHEC0231
Malfunction is detected when an improper voltage signal is sent to
ECM through EVAP canister vent control valve.
Possible Cause
NHEC0512
I Harness or connectors
(The valve circuit is open or shorted.)
I EVAP canister vent control valve
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0446 EVAPORATIVE EMISSION (EVAP) CANISTER VENT CONTROL
VALVE (CIRCUIT)
Component Description
EC-383
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