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SEF032W
SEF267X
Component Description
NHEC0338
NOTE:
If DTC P1448 is displayed with P0440, perform trouble diagno-
sis for DTC P1448 first.
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
NHEC0339
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
VENT CONT/V I Ignition switch: ON OFF
On Board Diagnosis Logic
NHEC0341
Malfunction is detected when EVAP canister vent control valve
remains opened under specified driving conditions.
Possible Cause
NHEC0591
I EVAP canister vent control valve
I EVAP control system pressure sensor and circuit
I Blocked rubber tube to EVAP canister vent control valve
I Water separator
I EVAP canister is saturated with water.
I Vacuum cut valve
DTC P1448 EVAPORATIVE EMISSION (EVAP) CANISTER VENT CONTROL
VALVE (OPEN)
Component Description
EC-564
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