Infiniti Q45. Manual — part 445
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
EC-419
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DTC P0447 EVAP CANISTER VENT CONTROL VALVE
PFP:14935
Component Description
NBS001XA
The EVAP canister vent control valve is located on the EVAP canis-
ter 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 energized.
A plunger will then move to seal the canister vent. The ability 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 evapo-
rative emission control system is depressurized and allows “EVAP
Control System” diagnosis.
CONSULT-II Reference Value in Data Monitor Mode
NBS001XB
Specification data are reference values.
On Board Diagnosis Logic
NBS001XC
SEF032W
PBIB0026E
MONITOR ITEM
CONDITION
SPECIFICATION
VENT CONT/V
●
Ignition switch: ON
OFF
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0447
0447
EVAP canister vent con-
trol valve circuit open
A)
An improper voltage signal is sent to ECM
through EVAP canister vent control valve.
●
Harness or connectors
(The valve circuit is open or shorted.)
●
EVAP canister vent control valve
B)
EVAP canister vent control valve remains
open under specified driving conditions.
●
EVAP canister vent control valve
●
EVAP control system pressure sensor
and the circuit
●
Blocked rubber tube to EVAP canister
vent control valve
●
Water separator
●
EVAP canister is saturated with water
●
Vacuum cut valve
EC-420
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
DTC Confirmation Procedure
NBS001XD
Perform PROCEDURE FOR MALFUNCTION A first.
If DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B.
NOTE:
●
If DTC P0447 is displayed with P0442, P0455, P0456, P1442 or P1456, first perform trouble diagno-
sis for DTC P0447.
●
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait
at least 10 seconds before conducting the next test.
PROCEDURE FOR MALFUNCTION A
TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11V at idle.
With CONSULT-II
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
EC-424, "Diagnostic Procedure"
.
With GST
Follow the procedure With CONSULT-II above.
PROCEDURE FOR MALFUNCTION B
TESTING CONDITION:
●
Perform “DTC WORK SUPPORT” when the fuel level is between 1/4 and 3/4 full, and vehicle is
placed on flat level surface.
●
Always perform test at a temperature of 0 to 30
°
C (32 to 86
°
F).
With CONSULT-II
1.
Turn ignition switch ON.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
4.
Make sure that the following conditions are met.
5.
Select “EVAP SML LEAK P0442/P1442” of “EVAPORATIVE
SYSTEM” in “DTC WORK SUPPORT” mode with CONSULT-II.
Follow the instruction displayed.
SEF058Y
COOLAN TEMP/S
0 - 70
°
C (32 - 158
°
F)
INT/A TEMP SE
0 - 30
°
C (32 - 86
°
F)
SEF475Y
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
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If the engine speed cannot be maintained within the range displayed on the CONSULT-II screen, go to
6.
Make sure that “OK” is displayed.
If “NG” is displayed, go to the following step.
NOTE:
Make sure that EVAP hoses are connected to EVAP canister
purge volume control solenoid valve properly.
7.
Stop engine and wait at least 10 seconds, then turn ON.
8.
Disconnect hose from water separator.
9.
Select “VENT CONTROL/V” of “ACTIVE TEST” mode with
CONSULT-II.
10. Touch “ON” and “OFF” alternately.
11. Make sure the following.
If the result is NG, go to
EC-424, "Diagnostic Procedure"
If the result is OK, go to “Diagnostic Procedure” for DTC P0442,
.
Overall Function Check
NBS00237
PROCEDURE FOR MALFUNCTION B
Use this procedure to check the overall function of the EVAP canister vent control valve circuit. During this
check, a 1st trip DTC might not be confirmed.
With GST
1.
Disconnect hose from water separator.
2.
Disconnect EVAP canister vent control valve harness connector.
PBIB0829E
SEC763C
PBIB1679E
Condition
VENT CONTROL/V
Air passage continuity between A and
B
ON
No
OFF
Yes
SEF337X
EC-422
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
3.
Verify the following.
EC-424, "Diagnostic Procedure"
.
If the result is OK, go to “Diagnostic Procedure” for DTC P0442,
Condition
Air passage continuity
12V direct current supply between ter-
minals 1 and 2
No
No supply
Yes
AEC783A
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