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SEF381Z
SEF267X
Component Description
NFEC1103
NOTE:
If DTC P1448 is displayed with P0442, 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
NFEC1104
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
VENT CONT/V I Ignition switch: ON OFF
On Board Diagnosis Logic
NFEC1106
DTC No.
Trouble diagnosis
name
DTC Detecting Condition Possible Cause
P1448
1448
EVAP canister vent
control valve open
EVAP canister vent control valve remains opened
under specified driving conditions.
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 Confirmation Procedure
NFEC1107
NOTE:
I If DTC P1448 is displayed with P0442, perform trouble
diagnosis for DTC P1448 first.
I If “DTC Confirmation Procedure” has been previously
conducted, always turn ignition switch “OFF” and wait at least
10 seconds before conducting the next test.
DTC P1448 EVAP CANISTER VENT CONTROL VALVE
Component Description
EC-594
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