Nissan Murano. Instruction — part 547
EC-298
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
Description
INFOID:0000000009720024
The EVAP canister purge volume control solenoid valve is used to
control the flow rate of fuel vapor from the EVAP canister. The EVAP
canister purge volume control solenoid valve is moved by ON/OFF
pulses from the ECM. The longer the ON pulse, the greater the
amount of fuel vapor that will flow through the valve.
DTC Logic
INFOID:0000000009720025
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
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009720026
1.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect EVAP canister purge volume control solenoid valve harness connector.
3.
Turn ignition switch ON.
PBIB3489E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0444
EVAP canister purge volume
control solenoid 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
EVAP canister purge volume
control solenoid 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
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
EC-299
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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4.
Check the voltage between EVAP canister purge volume control solenoid valve harness connector and
ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F121, E7
• Harness for open or short between EVAP canister purge volume control solenoid valve and IPDM E/R
• Harness for open or short between EVAP canister purge volume control solenoid valve and ECM
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID 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 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 4.
YES-2 >> Without CONSULT: GO TO 5.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
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
>> GO TO 6.
NO
>> GO TO 5.
5.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-300, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace EVAP canister purge volume control solenoid valve. Refer to
.
6.
CHECK INTERMITTENT INCIDENT
GI-44, "Intermittent Incident"
.
EVAP canister purge volume control
solenoid valve
Ground
Voltage
Connector
Terminal
F30
1
Ground
Battery voltage
EVAP canister purge volume con-
trol solenoid valve
ECM
Continuity
Connector
Terminal
Connector
Terminal
F30
2
F7
25
Existed
EC-300
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
>> INSPECTION END
Component Inspection
INFOID:0000000009720027
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.
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
.
Condition
(PURG VOL C/V value)
Air passage continuity
between (A) and (B)
100%
Existed
0%
Not existed
PBIB2058E
Condition
Air passage continuity
between (A) and (B)
12 V direct current supply between
terminals 1 and 2
Existed
No supply
Not existed
PBIB2059E
P0447 EVAP CANISTER VENT CONTROL VALVE
EC-301
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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P0447 EVAP CANISTER VENT CONTROL VALVE
Description
INFOID:0000000009720028
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:0000000009720029
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
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009720030
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
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
• Hoses
(Hoses are connected incorrectly or
clogged.)
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