Nissan Pathfinder. Manual — part 499
EC-302
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
DTC Logic
INFOID:0000000009178209
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
CONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
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 let it idle for at least 13 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009178210
1.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
3. Turn ignition switch ON.
4. Check the voltage between EVAP canister purge volume control solenoid valve harness connector and
ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform the trouble diagnosis for power supply circuit.
2.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0444
PURG VOLUME CONT/V
(Evaporative emission system
purge control valve circuit open)
An excessively low voltage signal is
sent to ECM through the valve
• Harness or connectors
(The solenoid valve circuit is open or
shorted.)
• EVAP canister purge volume control so-
lenoid valve
P0445
PURG VOLUME CONT/V
(Evaporative emission system
purge control valve circuit shorted)
An excessively high voltage signal is
sent to ECM through the valve
• Harness or connectors
(The solenoid valve circuit is shorted.)
• EVAP canister purge volume control so-
lenoid valve
EVAP canister purge volume control
solenoid valve
Ground
Voltage
Connector
Terminal
F16
1
Ground
Battery voltage
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
EC-303
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between EVAP canister purge volume control solenoid valve harness connector and
ECM harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES-1 >> With CONSULT: GO TO 3.
YES-2 >> Without CONSULT: GO TO 4.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT
1. Reconnect all harness connectors disconnected.
2. Start engine.
3. Perform “PURG VOL C/V” in “ACTIVE TEST” mode with CONSULT. Check that engine speed varies
according to the valve opening.
Does engine speed vary according to the valve opening?
YES
>> Check intermittent incident. Refer to
GI-49, "Intermittent Incident"
.
NO
>> GO TO 4.
4.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Check EVAP canister purge volume control solenoid valve. Refer to
EC-304, "Component Inspection"
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-49, "Intermittent Incident"
.
NO
>> Replace EVAP canister purge volume control solenoid valve. Refer to
TROL SYSTEM : Component Parts Location"
.
Component Inspection
INFOID:0000000009178211
1.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.
4. Turn ignition switch ON.
5. Select “PURG VOL C/V” in “ACTIVE TEST” mode with CONSULT.
6. Touch “Qd” and “Qu” on CONSULT screen to adjust “PURG
VOL C/V” opening and check air passage continuity of EVAP
canister purge volume control solenoid valve under the following
conditions.
Without CONSULT
1. Turn ignition switch OFF.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
3. Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.
EVAP canister purge volume con-
trol solenoid valve
ECM
Continuity
Connector
Terminal
Connector
Terminal
F16
2
F51
42
Existed
Condition
(PURG VOL C/V value)
Air passage continuity
between
and
100%
Existed
0%
Not existed
PBIB2058E
EC-304
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
4. Check air passage continuity of EVAP canister purge volume
control solenoid valve under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace EVAP canister purge volume control solenoid valve. Refer to
TROL SYSTEM : Component Parts Location"
.
Condition
Air passage continuity
between
and
12 V direct current supply between
terminals 1 and 2
Existed
No supply
Not existed
PBIB2059E
P0447 EVAP CANISTER VENT CONTROL VALVE
EC-305
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P0447 EVAP CANISTER VENT CONTROL VALVE
DTC Logic
INFOID:0000000009178212
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
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
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009178213
1.
INSPECTION START
Will CONSULT be used?
Will CONSULT be used?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
CHECK EVAP CANISTER VENT CONTROL VALVE CIRCUIT
With CONSULT
1. Turn ignition switch OFF and then ON.
2. Select “VENT CONTROL/V” in “ACTIVE TEST” mode with CONSULT.
3. Touch “ON/OFF” on CONSULT screen.
4. Check for operating sound of the valve.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 3.
3.
CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect EVAP canister vent control valve harness connector.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0447
VENT CONTROL VALVE
(Evaporative emission sys-
tem vent control 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
• Hoses
(Hoses are connected incorrectly or
clogged.)
Clicking sound should be heard.
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