Infiniti G20 (P11). Manual — part 156
SEF462UC
EVAP Service Port
NCEC0019S09
Positive pressure is delivered to the EVAP system through the
EVAP service port. If fuel vapor leakage in the EVAP system
occurs, use a leak detector to locate the leak.
GI
MA
EM
LC
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CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION
Evaporative Emission System (Cont’d)
EC-35
PEF838U
PEF917U
SEF200U
SEF323Z
SEF931X
How to Detect Fuel Vapor Leakage
NCEC0019S10
CAUTION:
I
Never use compressed air or a high pressure pump.
I
Do not start engine.
I
Do not exceed 4.12 kPa (0.042 kg/cm
2
, 0.6 psi) of pressure
in EVAP system.
NOTE:
Improper installation of adapter to the service port may cause
a leak.
With CONSULT-II
1)
Attach the EVAP service port adapter securely to the EVAP
service port.
2)
Also attach the pressure pump and hose.
3)
Turn ignition switch “ON”.
4)
Select the “EVAP SYSTEM CLOSE” of “WORK SUPPORT
MODE” with CONSULT-II.
5)
Touch “START”. A bar graph (Pressure indicating display) will
appear on the screen.
6)
Apply positive pressure to the EVAP system until the pressure
indicator reaches the middle of the bar graph.
7)
Remove the EVAP service port adapter and hose with pres-
sure pump.
8)
Locate the leak using a leak detector. Refer to “EVAPORATIVE
EMISSION LINE DRAWING”, EC-37.
Without CONSULT-II
1)
Attach the EVAP service port adapter securely to the EVAP
service port and pressure pump with pressure gauge to the
EVAP service port.
2)
Apply battery voltage to between the terminals of both EVAP
canister vent control valve and vacuum cut valve bypass valve
to make a closed EVAP system.
3)
To locate the leak, deliver positive pressure to the EVAP sys-
tem until pressure gauge points reach 1.38 to 2.76 kPa (0.014
to 0.028 kg/cm
2
, 0.2 to 0.4 psi).
4)
Remove the EVAP service port adapter and hose with pres-
sure pump.
5)
Locate the leak using a leak detector. Refer to “EVAPORATIVE
EMISSION LINE DRAWING”, EC-37.
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION
Evaporative Emission System (Cont’d)
EC-36
EVAPORATIVE EMISSION LINE DRAWING
NCEC0020
SEF915Z
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION
Evaporative Emission System (Cont’d)
EC-37
NOTE:
Do not use soapy water or any type of solvent while installing vacuum hoses or purge hoses.
SEF832X
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION
Evaporative Emission System (Cont’d)
EC-38
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