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
SEF058Y
WITH CONSULT-II
NHEC0974S01
1)
Turn ignition switch ON.
2)
Select “DATA MONITOR” mode with CONSULT-II.
3)
Start engine and wait at least 8 seconds.
4)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-372.
WITH GST
NHEC0974S02
Follow the procedure “WITH CONSULT-II” above.
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
DTC Confirmation Procedure (Cont’d)
EC-370
Wiring Diagram
=NHEC0975
MEC553D
SEF668XC
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
Wiring Diagram
EC-371
Diagnostic Procedure
NHEC0976
1
INSPECTION START
1. Do you have CONSULT-II?
Yes or No
Yes
©
GO TO 2.
No
©
GO TO 3.
2
CHECK EVAP CANISTER VENT CONTROL VALVE CIRCUIT
With CONSULT-II
1. Turn ignition switch OFF and then turn ON.
2. Select “VENT CONTROL/V” in “ACTIVE TEST” mode with CONSULT-II.
3. Touch “ON/OFF” on CONSULT-II screen.
PBIB0151E
4. Check for operating sound of the valve.
Clicking noise should be heard.
OK or NG
OK
©
GO TO 7.
NG
©
GO TO 3.
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
Diagnostic Procedure
EC-372
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