Infiniti I35 (A33). Manual — part 309
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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.
SEF462UA
Overall Function Check
NHEC1481
WITH GST
NHEC1481S01
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-578.
If OK, go to next step.
8)
Disconnect GST.
9)
Start engine and warm it up to normal operating temperature.
10) Turn ignition switch OFF and wait at least 10 seconds.
11) Restart engine and let it idle for 90 seconds.
12) Keep engine speed at 2,000 rpm for 30 seconds.
13) Turn ignition switch OFF.
NOTE:
For more information, refer to GST instruction manual.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1456 EVAP CONTROL SYSTEM
DTC Confirmation Procedure (Cont’d)
EC-577
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Diagnostic Procedure
NHEC1482
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.
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
©
1. Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
2. 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.
DTC P1456 EVAP CONTROL SYSTEM
Diagnostic Procedure
EC-578
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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 P1456 EVAP CONTROL SYSTEM
Diagnostic Procedure (Cont’d)
EC-579
![](/vehicles/zatt/ltherawowha/yose/ryovell.png)
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 P1456 EVAP CONTROL SYSTEM
Diagnostic Procedure (Cont’d)
EC-580
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