Infiniti M35/M45 Y50. Manual — part 496
DTC P0456 EVAP CONTROL SYSTEM
EC-457
[VQ35DE]
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5.
INSTALL THE PRESSURE PUMP
To locate the EVAP leak, install EVAP service port adapter and pres-
sure pump to EVAP service port securely.
NOTE:
Improper installation of the EVAP service port adapter to the
EVAP service port may cause leaking.
With CONSULT-II>>GO TO 6.
Without CONSULT-II>>GO TO 7.
6.
CHECK FOR EVAP LEAK
With CONSULT-II
1.
Turn ignition switch ON.
2.
Select “EVAP SYSTEM CLOSE” of “WORK SUPPORT” mode with CONSULT-II.
3.
Touch “START” and apply pressure into the EVAP line until the
pressure indicator reaches the middle of the bar graph.
CAUTION:
●
Do not use compressed air or a high pressure pump.
●
Do not exceed 4.12 kPa (0.042 kg/cm
2
, 0.6 psi) of pres-
sure in the system.
4.
Using EVAP leak detector, locate the EVAP leak. For the leak
detector, refer to the instruction manual for more details.
Refer to
EC-40, "EVAPORATIVE EMISSION LINE DRAWING"
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace.
PBIB2006E
SEF916U
PEF917U
SEF200U
EC-458
[VQ35DE]
DTC P0456 EVAP CONTROL SYSTEM
7.
CHECK FOR EVAP LEAK
Without CONSULT-II
1.
Turn ignition switch OFF.
2.
Apply 12 volts DC to EVAP canister vent control valve (1). The
valve will close. (Continue to apply 12 volts until the end of test.)
–
Illustration shows the view from under the vehicle
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: Vehicle front
–
EVAP canister (2)
–
EVAP control system pressure sensor (3)
3.
Pressurize the EVAP line using pressure pump with 1.3 to 2.7
kPa (10 to 20 mmHg, 0.39 to 0.79 inHg), then remove pump and
EVAP service port adapter.
CAUTION:
●
Do not use compressed air or a high pressure pump.
●
Do not exceed 4.12 kPa (0.042 kg/cm
2
, 0.6 psi) of pressure in the system.
4.
Using EVAP leak detector, locate the EVAP leak. For the leak
detector, refer to the instruction manual for more details. Refer
to
EC-40, "EVAPORATIVE EMISSION LINE DRAWING"
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace.
8.
CHECK EVAP CANISTER VENT CONTROL VALVE
Check the following.
●
EVAP canister vent control valve is installed properly.
Refer to
EC-43, "Removal and Installation"
●
EVAP canister vent control valve.
Refer to
EC-420, "Component Inspection"
OK or NG
OK
>> GO TO 9.
NG
>> Repair or replace EVAP canister vent control valve and O-ring.
9.
CHECK IF EVAP CANISTER SATURATED WITH WATER
1.
Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
2.
Does water drain from the EVAP canister (1)?
–
EVAP canister vent control valve (2)
Yes or No
Yes
>> GO TO 10.
No (With CONSULT-II)>>GO TO 12.
No (Without CONSULT-II)>>GO TO 13.
PBIB2702E
SEF200U
PBIB2731E
DTC P0456 EVAP CONTROL SYSTEM
EC-459
[VQ35DE]
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10.
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 2.0 kg (4.4 lb).
OK or NG
OK (With CONSULT-II)>>GO TO 12.
OK (Without CONSULT-II)>>GO TO 13.
NG
>> GO TO 11.
11.
DETECT MALFUNCTIONING PART
Check the following.
●
EVAP canister for damage
●
EVAP hose between EVAP canister and vehicle frame for clogging or poor connection
>> Repair hose or replace EVAP canister.
12.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT-II
1.
Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
2.
Start engine.
3.
Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode.
4.
Touch “Qu” on CONSULT-II screen to increase “PURG VOL
CONT/V” opening to 100%.
5.
Check vacuum hose for vacuum when revving engine up to
2,000 rpm.
OK or NG
OK
>> GO TO 15.
NG
>> GO TO 14.
13.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
Without CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Stop engine.
3.
Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
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.
OK or NG
OK
>> GO TO 16.
NG
>> GO TO 14.
14.
CHECK VACUUM HOSE
Check vacuum hoses for clogging or disconnection. Refer to
.
OK or NG
OK
>> GO TO 15.
NG
>> Repair or reconnect the hose.
PBIB1678E
Vacuum should exist.
EC-460
[VQ35DE]
DTC P0456 EVAP CONTROL SYSTEM
15.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to
EC-407, "Component Inspection"
OK or NG
OK
>> GO TO 16.
NG
>> Replace EVAP canister purge volume control solenoid valve.
16.
CHECK FUEL TANK TEMPERATURE SENSOR
Refer to
EC-336, "Component Inspection"
OK or NG
OK
>> GO TO 17.
NG
>> Replace fuel level sensor unit.
17.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to
EC-430, "Component Inspection"
OK or NG
OK
>> GO TO 18.
NG
>> Replace EVAP control system pressure sensor.
18.
CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection.
Refer to
EC-40, "EVAPORATIVE EMISSION LINE DRAWING"
.
OK or NG
OK
>> GO TO 19.
NG
>> Repair or reconnect the hose.
19.
CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
>> GO TO 20.
20.
CHECK EVAP/ORVR LINE
Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kink, looseness and improper con-
nection. For location, refer to
EC-46, "ON BOARD REFUELING VAPOR RECOVERY (ORVR)"
OK or NG
OK
>> GO TO 21.
NG
>> Repair or replace hoses and tubes.
21.
CHECK RECIRCULATION LINE
Check recirculation line between filler neck tube and fuel tank for clogging, kink, cracks, looseness and
improper connection.
OK or NG
OK
>> GO TO 22.
NG
>> Repair or replace hose, tube or filler neck tube.
22.
CHECK REFUELING EVAP VAPOR CUT VALVE
Refer to
.
OK or NG
OK
>> GO TO 23.
NG
>> Replace refueling EVAP vapor cut valve with fuel tank.
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