Infiniti M35/M45 Y50. Manual — part 487
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
EC-421
[VQ35DE]
C
D
E
F
G
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J
K
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M
A
EC
5.
Perform “VENT CONTROL/V” in “ACTIVE TEST” mode.
6.
Check air passage continuity and operation delay time.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
7.
Clean the air passage [portion (A) to (B)] of EVAP canister vent control valve using an air blower.
8.
Perform step 6 again.
Without CONSULT-II
1.
Remove EVAP canister vent control valve from EVAP canister.
2.
Check portion (B) of EVAP canister vent control valve for being
rusted.
3.
Check air passage continuity and operation delay time under the
following conditions.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
4.
Clean the air passage [portion (A) to (B)] of EVAP canister vent control valve using an air blower.
5.
Perform step 3 again.
Condition VENT CONTROL/V
Air passage continuity between A and B
ON
No
OFF
Yes
PBIB1679E
PBIB1033E
Condition
Air passage continuity between (A) and (B)
12V direct current supply between
terminals (1) and (2)
No
OFF
Yes
PBIB1034E
EC-422
[VQ35DE]
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
PFP:16935
Component Description
NBS0050B
The EVAP canister vent control valve (1) is located on the EVAP
canister (2) and is used to seal the canister vent.
●
Illustration shows the view from under the vehicle.
●
: Vehicle front
●
EVAP control system pressure sensor (3)
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
NBS0050C
Specification data are reference values.
On Board Diagnosis Logic
NBS0050D
PBIB2702E
PBIB1263E
MONITOR ITEM
CONDITION
SPECIFICATION
VENT CONT/V
●
Ignition switch: ON
OFF
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0448
0448
EVAP canister vent con-
trol valve close
EVAP canister vent control valve remains
closed under specified driving conditions.
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EVAP canister vent control valve
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EVAP control system pressure sensor
and the circuit
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Blocked rubber tube to EVAP canister
vent control valve
●
EVAP canister is saturated with water
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-423
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
DTC Confirmation Procedure
NBS0050E
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.
WITH CONSULT-II
1.
Turn ignition switch ON and wait at least 5 seconds.
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.
Start engine and let it idle for at least 1 minute.
5.
Repeat next procedures three times.
a.
Increase the engine speed up to 3,000 to 3,500 rpm and keep it
for 2 minutes and 50 seconds to 3 minutes.
Never exceed 3 minutes.
b.
Fully released accelerator pedal and keep engine idle for about
5 seconds.
6.
If 1st trip DTC is detected, go to
EC-425, "Diagnostic Procedure"
.
If 1st trip DTC is not detected, go to the next step.
7.
Repeat next procedure 20 times.
a.
Quickly increase the engine speed up to 4,000 to 4,500 rpm or more and keep it for 25 to 30 seconds.
b.
Fully released accelerator pedal and keep engine idle for at least 35 seconds.
8.
If 1st trip DTC is detected, go to
EC-425, "Diagnostic Procedure"
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF058Y
PBIB0972E
EC-424
[VQ35DE]
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
Wiring Diagram
NBS0050F
TBWT1532E
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