Infiniti EX35. Manual — part 636
EC-286
< COMPONENT DIAGNOSIS >
[VQ35HR]
P0447 EVAP CANISTER VENT CONTROL VALVE
P0447 EVAP CANISTER VENT CONTROL VALVE
Description
INFOID:0000000003133436
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.
DTC Logic
INFOID:0000000003133437
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
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 11 V at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine and wait at least 8 seconds.
2.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000003133438
1.
INSPECTION START
Do you have CONSULT-III?
Do you have CONSULT-III?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
CHECK EVAP CANISTER VENT CONTROL VALVE CIRCUIT
With CONSULT-III
1.
Turn ignition switch OFF and then turn ON.
2.
Select “VENT CONTROL/V” in “ACTIVE TEST” mode with CONSULT-III.
3.
Touch “ON/OFF” on CONSULT-III screen.
4.
Check for operating sound of the valve.
PBIB1263E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0447
EVAP canister vent con-
trol valve circuit open
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
P0447 EVAP CANISTER VENT CONTROL VALVE
EC-287
< COMPONENT DIAGNOSIS >
[VQ35HR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 3.
3.
CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect EVAP canister vent control valve harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between EVAP canister vent control valve harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E3, F1
• Harness connectors F103, M116
• Harness connectors B201, M117
• Harness for open or short between EVAP canister vent control valve and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK EVAP CANISTER VENT CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between EVAP canister vent control valve harness connector and ECM harness con-
nector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 6.
6.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors B201, M117
• Harness for open or short between EVAP canister vent control valve and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK RUBBER TUBE FOR CLOGGING
1.
Disconnect rubber tube connected to EVAP canister vent control valve.
2.
Check the rubber tube for clogging.
Is the inspection result normal?
Clicking sound should be heard.
EVAP canister vent con-
trol valve
Ground
Voltage
Connector
Terminal
B253
1
Ground
Battery voltage
EVAP canister vent
control valve
ECM
Continuity
Connector
Terminal
Connector
Terminal
B253
2
M107
121
Existed
EC-288
< COMPONENT DIAGNOSIS >
[VQ35HR]
P0447 EVAP CANISTER VENT CONTROL VALVE
YES
>> GO TO 8.
NO
>> Clean the rubber tube using an air blower.
8.
CHECK EVAP CANISTER VENT CONTROL VALVE
EC-288, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Replace EVAP canister vent control valve.
9.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000003133439
1.
CHECK EVAP CANISTER VENT CONTROL VALVE-I
1.
Turn ignition switch OFF.
2.
Remove EVAP canister vent control valve from EVAP canister.
3.
Check portion (A) of EVAP canister vent control valve for being
rusted.
Is it rusted?
YES
>> Replace EVAP canister vent control valve
NO
>> GO TO 2.
2.
CHECK EVAP CANISTER VENT CONTROL VALVE-II
With CONSULT-III
1.
Reconnect harness connectors disconnected.
2.
Turn ignition switch ON.
3.
Perform “VENT CONTROL/V” in “ACTIVE TEST” mode.
4.
Check air passage continuity and operation delay time.
Check new O-ring is installed properly.
Operation takes less than 1 second.
Without CONSULT-III
1.
Disconnect EVAP canister vent control valve harness connector.
2.
Check air passage continuity and operation delay time under the
following conditions.
Check new O-ring is installed properly.
Operation takes less than 1 second.
Is the inspection result normal?
YES
>> GO TO 3.
JMBIA0168ZZ
VENT CONTROL/V Condition
Air passage continuity between (A) and (B)
ON
Not existed
OFF
Existed
Condition
Air passage continuity between (A) and (B)
12 V direct current supply between
terminals 1 and 2
Not existed
OFF
Existed
JMBIA0169ZZ
P0447 EVAP CANISTER VENT CONTROL VALVE
EC-289
< COMPONENT DIAGNOSIS >
[VQ35HR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
NO
>> Replace EVAP canister vent control valve
3.
CHECK EVAP CANISTER VENT CONTROL VALVE-III
With CONSULT-III
1.
Clean the air passage [portion (A) to (B)] of EVAP canister vent control valve using an air blower.
2.
Perform “VENT CONTROL/V” in “ACTIVE TEST” mode.
3.
Check air passage continuity and operation delay time.
Check new O-ring is installed properly.
Operation takes less than 1 second.
Without CONSULT-III
1.
Clean the air passage [portion (A) to (B)] of EVAP canister vent
control valve using an air blower.
2.
Check air passage continuity and operation delay time under the
following conditions.
Check new O-ring is installed properly.
Operation takes less than 1 second.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace EVAP canister vent control valve
VENT CONTROL/V Condition
Air passage continuity between (A) and (B)
ON
Not existed
OFF
Existed
Condition
Air passage continuity between (A) and (B)
12 V direct current supply between
terminals 1 and 2
Not existed
OFF
Existed
JMBIA0169ZZ
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