Infiniti I35 (A33). Manual — part 266
SEC764C
DTC Confirmation Procedure
NHEC0988
SEC765C
SEC766C
CAUTION:
Never remove fuel filler cap during the DTC confirmation pro-
cedure.
NOTE:
I
If DTC P0456 is displayed with P0442, perform TROUBLE
DIAGNOSIS FOR DTC P0456 first.
I
If
DTC
Confirmation
Procedure
has
been
previously
conducted, always turn ignition switch OFF and wait at least 10
seconds before conducting the next test.
I
After repair, make sure that the hoses and clips are
installed properly.
TESTING CONDITION:
I
Open engine hood before conducting following proce-
dure.
I
If any of following condition is met just before the DTC
confirmation procedure, leave the vehicle for more than 1
hour.
a)
Fuel filler cap is removed.
b)
Refilled or drained the fuel.
c)
EVAP component parts is/are removed.
I
Before performing the following procedure, confirm that
battery voltage is more than 11V at idle.
With CONSULT-II
1)
Turn ignition switch ON and select “DATA MONITOR” mode
with CONSULT-II.
2)
Make sure the following conditions are met.
FUEL LEVEL SE: 1.08 - 0.2V
COOLAN TEMP/S: 0 - 32°C (32 - 90°F)
FUEL T/TMP SE: 0 - 35°C (32 - 95°F)
INT A/TEMP SE: More than 0°C (32°F)
If NG, turn ignition switch OFF and leave the vehicle in a cool
place (soak the vehicle) or refilling/draining fuel until the out-
put voltage condition of the “FUEL LEVEL SE” meets within the
range above and leave the vehicle for more than 1 hour. Then
start from step 1).
3)
Turn ignition switch OFF and wait at least 5 seconds.
4)
Turn ignition switch ON.
5)
Select “EVP V/S LEAK P0456/P1456” of “EVAPORATIVE
SYSTEM” in “DTC WORK SUPPORT” mode with CONSULT-
II.
Follow the instruction displayed.
6)
Make sure that “OK” is displayed.
If “NG” is displayed, refer to “Diagnostic Procedure”, EC-406.
NOTE:
I
If the engine speed cannot be maintained within the range
displayed
on
CONSULT-II
screen,
go
to
“Basic
Inspection”, EC-120.
I
Make sure that EVAP hoses are connected to EVAP canis-
ter purge volume control solenoid valve properly.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0456 EVAP CONTROL SYSTEM
DTC Confirmation Procedure
EC-405
SEF462UA
Overall Function Check
NHEC0989
WITH GST
NHEC0989S01
Use this procedure to check the overall function of the EVAP very
small leak function. During this check, a 1st trip DTC might not be
confirmed.
CAUTION:
I
Never use compressed air, doing so may damage the
EVAP system.
I
Do not start engine.
I
Do not exceeded 4.12 kPa (0.042 kg/cm
2
, 0.6 psi).
1)
Attach the EVAP service port adapter securely to the EVAP
service port.
2)
Set the pressure pump and a hose.
3)
Also set a vacuum gauge via 3-way connector and a hose.
4)
Turn ignition switch ON.
5)
Connect GST and select mode 8.
6)
Using mode 8 control the EVAP canister vent control valve
(close) and vacuum cut valve bypass valve (open).
7)
Apply pressure and make sure the following conditions are
satisfied.
Pressure to be applied: 2.7 kPa (20 mmHg, 0.79 inHg)
Time to be waited after the pressure drawn in to the EVAP
system and the pressure to be dropped: 60 seconds and
the pressure should not be dropped more than 0.4 kPa (3
mmHg, 0.12 inHg)
If NG, go to diagnostic procedure, EC-406.
NOTE:
For more information, refer to GST instruction manual.
Diagnostic Procedure
NHEC0990
1
CHECK FUEL FILLER CAP DESIGN
1. Turn ignition switch OFF.
2. Check for genuine NISSAN fuel filler cap design.
SEF915U
OK or NG
OK
©
GO TO 2.
NG
©
Replace with genuine NISSAN fuel filler cap.
DTC P0456 EVAP CONTROL SYSTEM
Overall Function Check
EC-406
2
CHECK FUEL FILLER CAP INSTALLATION
Check that the cap is tightened properly by rotating the cap clockwise.
OK or NG
OK
©
GO TO 3.
NG
©
I
Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
I
Retighten until ratcheting sound is heard.
3
CHECK FUEL FILLER CAP FUNCTION
Check for air releasing sound while opening the fuel filler cap.
OK or NG
OK
©
GO TO 5.
NG
©
GO TO 4.
4
CHECK FUEL TANK VACUUM RELIEF VALVE
1. Wipe clean valve housing.
2. Check valve opening pressure and vacuum.
SEF445Y
SEF943S
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)
CAUTION:
Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may come on.
OK or NG
OK
©
GO TO 5.
NG
©
Replace fuel filler cap with a genuine one.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0456 EVAP CONTROL SYSTEM
Diagnostic Procedure (Cont’d)
EC-407
5
INSTALL THE PRESSURE PUMP
To locate the EVAP leak, install EVAP service port adapter and pressure pump to EVAP service port securely.
SEC929C
SEF916U
NOTE:
Improper installation of the EVAP service port adapter to the EVAP service port may cause leaking.
Models with CONSULT-II
©
GO TO 6.
Models without CON-
SULT-II
©
GO TO 7.
DTC P0456 EVAP CONTROL SYSTEM
Diagnostic Procedure (Cont’d)
EC-408
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