Nissan Maxima. Manual — part 461
EC-328
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
4. Blow air into port A and check that it flows freely out of port B.
5. Block port B.
6. Blow air into port A and check that there is no leakage.
7. If NG, replace drain filter.
PBIB3641E
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
EC-329
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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EC
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P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
Description
INFOID:0000000010095012
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 via the valve.
DTC Logic
INFOID:0000000010095013
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:0000000010095014
Regarding Wiring Diagram information, refer to
.
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.
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 via 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 via the valve
• Harness or connectors
(The solenoid valve circuit is shorted.)
• EVAP canister purge volume control so-
lenoid valve
EC-330
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
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 3.
NO
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E11, F2
• Junction block connectors E44, E45
• 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 CONT/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-331, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace EVAP canister purge volume control solenoid valve.
6.
CHECK INTERMITTENT INCIDENT
GI-41, "Intermittent Incident"
EVAP canister purge volume control
solenoid valve
Ground
Voltage
Connector
Terminal
F29
1
Ground
Battery voltage
PBIB0080E
EVAP canister purge volume con-
trol solenoid valve
ECM
Continuity
Connector
Terminal
Connector
Terminal
F29
2
F14
25
Existed
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
EC-331
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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EC
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>> INSPECTION END
Component Inspection
INFOID:0000000010095015
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
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 CONT/V” in “ACTIVE TEST” mode with CONSULT.
6. Touch “Qd” and “Qu” on CONSULT screen to adjust “PURG
VOL CONT/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
DRAIN FILTER
1. Check visually for insect nests in the drain filter air inlet.
2. Check visually for cracks or flaws in the appearance.
3. Check visually for cracks or flaws in the hose.
Condition
(PURG VOL CONT/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
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