Infiniti I35 (A33). Manual - part 257
SEF381Z
SEF267X
Component Description
NHEC0970
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
NHEC0971
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
VENT CONT/V
I
Ignition switch: ON
OFF
On Board Diagnosis Logic
NHEC0973
DTC No.
Trouble diagnosis
name
DTC Detecting Condition
Possible Cause
P0447
0447
EVAP canister vent
control valve circuit
open
An improper voltage signal is sent to ECM through
EVAP canister vent control valve.
I
Harness or connectors
(The valve circuit is open or shorted.)
I
EVAP canister vent control valve
DTC Confirmation Procedure
NHEC0974
NOTE:
If DTC Confirmation Procedure has been previously conducted,
always turn ignition switch OFF and wait at least 10 seconds before
conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm battery
voltage is more than 11V at idle.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
Component Description
EC-369