Infiniti M45 (Y34). Manual — part 467
DTC P1446 EVAP CANISTER VENT CONTROL VALVE
EC-557
C
D
E
F
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A
EC
Component Inspection
ABS002QR
EVAP CANISTER VENT CONTROL VALVE
With 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.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
3.
Reconnect harness connectors disconnected.
4.
Turn ignition switch ON.
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 5 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.
SEF337X
Condition VENT CONTROL/V
Air passage continuity between A and B
ON
No
OFF
Yes
PBIB0153E
SEF337X
Condition
Air passage continuity between A and B
12V direct current supply between
terminals 1 and 2
No
OFF
Yes
PBIB0154E
EC-558
DTC P1448 EVAP CANISTER VENT CONTROL VALVE
DTC P1448 EVAP CANISTER VENT CONTROL VALVE
PFP:14935
Component Description
ABS002QS
NOTE:
If DTC P1448 is displayed with P0442, P0455, P0456, P1442 or P1456, perform trouble diagnosis for
DTC P1448 first.
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 (Small Leak) diagnosis.
CONSULT-II Reference Value in Data Monitor Mode
ABS002QT
Specification data are reference values.
On Board Diagnosis Logic
ABS002QU
DTC Confirmation Procedure
ABS002QW
NOTE:
●
If DTC P1448 is displayed with P0442, P0455, P0456, P1442 or P1456, first perform trouble diagno-
sis for DTC P1448.
●
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
TESTING CONDITION:
SEF032W
PBIB0026E
MONITOR ITEM
CONDITION
SPECIFICATION
VENT CONT/V
●
Ignition switch: ON
OFF
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1448
1448
EVAP canister vent control
valve open
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
DTC P1448 EVAP CANISTER VENT CONTROL VALVE
EC-559
C
D
E
F
G
H
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M
A
EC
●
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).
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.
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-562, "Diagnostic Procedure"
If the result is OK, go to “Diagnostic Procedure” for DTC P0442,
.
Overall Function Check
ABS002QX
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.
COOLAN TEMP/S
0 - 70
°
C (32 - 158
°
F)
INT/A TEMP SE
0 - 30
°
C (32 - 86
°
F)
PBIB2643E
PBIB0829E
SEC763C
Condition
VENT CONTROL/V
Air passage continuity between A and
B
ON
No
OFF
Yes
PBIB0153E
EC-560
DTC P1448 EVAP CANISTER VENT CONTROL VALVE
WITH GST
1.
Disconnect hose from water separator.
2.
Disconnect EVAP canister vent control valve harness connector.
3.
Verify the following.
EC-562, "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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