Nissan Maxima. Instruction — part 471
EC-368
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0456 EVAP CONTROL SYSTEM
Remove EVAP canister with EVAP canister vent control valve and
EVAP control system pressure sensor attached. Refer to
.
Does water drain from the EVAP canister?
YES
>> GO TO 9.
NO-1 >> With CONSULT: GO TO 11.
NO-2 >> Without CONSULT: GO TO 12.
9.
CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.1 kg (4.6 lb).
Is the inspection result normal?
YES-1 >> With CONSULT: GO TO 11.
YES-2 >> Without CONSULT: GO TO 12.
NO
>> GO TO 10.
10.
DETECT MALFUNCTIONING PART
Check the following.
• EVAP canister for damage
• EVAP hose between EVAP canister and drain filter for clogging or poor connection
>> Repair hose or replace EVAP canister. Refer to
FL-14, "Removal and Installation (EVAP Canis-
.
11.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT
1. Disconnect vacuum hose connected to EVAP service port and EVAP canister purge volume control sole-
noid valve from EVAP canister purge volume control solenoid valve.
2. Start engine.
3. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode.
4. Touch “Qu” on CONSULT screen to increase “PURG VOL CONT/V” opening to 100%.
5. Check vacuum hose for vacuum.
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> GO TO 13.
12.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
Without CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Disconnect vacuum hose connected to EVAP service port and EVAP canister purge volume control sole-
noid valve from EVAP canister purge volume control solenoid valve.
4. Start engine and let it idle for at least 80 seconds.
5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
Is the inspection result normal?
YES
>> GO TO 15.
NO
>> GO TO 13.
13.
CHECK VACUUM HOSE
PBIB1213E
Vacuum should exist.
Vacuum should exist.
P0456 EVAP CONTROL SYSTEM
EC-369
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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Check vacuum hoses for clogging or disconnection. Refer to
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> Repair or reconnect the hose.
14.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-327, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 15.
NO
>> Replace EVAP canister purge volume control solenoid valve.
15.
CHECK FUEL TANK TEMPERATURE SENSOR
EC-272, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 16.
NO
>> Replace fuel level sensor unit. Refer to
FL-6, "Removal and Installation"
.
16.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-346, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 17.
NO
>> Replace EVAP control system pressure sensor. Refer to
FL-17, "Removal and Installation"
.
17.
CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection.
Is the inspection result normal?
YES
>> GO TO 18.
NO
>> Repair or reconnect the hose.
18.
CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
>> GO TO 19.
19.
CHECK EVAP/ORVR LINE
Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kinks, looseness and improper
connection. For location, refer to
.
Is the inspection result normal?
YES
>> GO TO 20.
NO
>> Repair or replace hoses and tubes.
20.
CHECK RECIRCULATION LINE
Check recirculation line between filler neck tube and fuel tank for clogging, kinks, cracks, looseness and
improper connection.
Is the inspection result normal?
YES
>> GO TO 21.
NO
>> Repair or replace hose, tube or filler neck tube.
21.
CHECK REFUELING EVAP VAPOR CUT VALVE
EC-511, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 22.
NO
>> Replace refueling EVAP vapor cut valve with fuel tank. Refer to
22.
CHECK FUEL LEVEL SENSOR
MWI-41, "Component Inspection"
.
EC-370
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0456 EVAP CONTROL SYSTEM
Is the inspection result normal?
YES
>> GO TO 23.
NO
>> Replace fuel level sensor unit. Refer to
FL-6, "Removal and Installation"
.
23.
CHECK INTERMITTENT INCIDENT
GI-41, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000010095042
FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FILLER CAP)
1.
CHECK FUEL FILLER CAP
1. Turn ignition switch OFF.
2. Remove fuel filler cap. Refer to
.
3. Wipe clean valve housing.
4. Install fuel filler cap adapter (commercial service tool) to fuel filler cap.
5. Check valve opening pressure and vacuum.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
REPLACE FUEL FILLER CAP
Replace fuel filler cap. Refer to
CAUTION:
Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may
illuminate.
>> INSPECTION END
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.
SEF445Y
Pressure: 15.3 - 20.0 kPa (0.156 - 0.204 kg/cm
2
, 2.22 -
2.90 psi)
Vacuum:
−6.0 to −3.3 kPa (−0.061 to −0.034 kg/cm
2
,
−0.87 to −0.48 psi)
SEF943S
P0456 EVAP CONTROL SYSTEM
EC-371
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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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
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