Infiniti I35 (A33). Manual — part 175
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EVAPORATIVE EMISSION LINE DRAWING
NHEC1421
SEC896CA
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION
Evaporative Emission System (Cont’d)
EC-41
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SEF253XA
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION
Evaporative Emission System (Cont’d)
EC-42
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On Board Refueling Vapor Recovery (ORVR)
NHEC0744
SYSTEM DESCRIPTION
NHEC0744S01
SEF206VA
SEF830X
From the beginning of refueling, the fuel tank pressure goes up. When the pressure reaches the setting value
of the refueling control valve (RCV) opening pressure, the RCV is opened. After RCV opens, the air and vapor
inside the fuel tank go through refueling EVAP vapor cut valve, RCV and refueling vapor line to the EVAP
canister. The vapor is absorbed by the EVAP canister and the air is released to the atmosphere.
When the refueling has reached the full level of the fuel tank, the refueling EVAP vapor cut valve is closed
and refueling is stopped because of auto shut-off. The vapor which was absorbed by the EVAP canister is
purged during driving.
The RCV is always closed during driving and the evaporative emission control system is operated the same
as conventional system.
WARNING:
When conducting inspections below, be sure to observe the following:
I
Put a “CAUTION: INFLAMMABLE” sign in workshop.
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Do not smoke while servicing fuel system. Keep open flames and sparks away from work area.
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Be sure to furnish the workshop with a CO
2
fire extinguisher.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION
On Board Refueling Vapor Recovery (ORVR)
EC-43
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CAUTION:
I
Before removing fuel line parts, carry out the following procedures:
a) Put drained fuel in an explosion-proof container and put lid on securely.
b) Release fuel pressure from fuel line. Refer to “Fuel Pressure Release”, EC-55.
c) Disconnect battery ground cable.
I
Always replace O-ring when the fuel gauge retainer is removed.
I
Do not kink or twist hose and tube when they are installed.
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Do not tighten hose and clamps excessively to avoid damaging hoses.
I
After installation, run engine and check for fuel leaks at connection.
I
Do not attempt to top off the fuel tank after the fuel pump nozzle shuts off automatically.
Continued refueling may cause fuel overflow, resulting in fuel spray and possibly a fire.
DIAGNOSTIC PROCEDURE
NHEC0744S02
Symptom: Fuel Odor from EVAP Canister Is Strong.
NHEC0744S0201
1
CHECK EVAP CANISTER
1. Remove EVAP canister with EVAP canister vent control valve attached.
2. Weigh the EVAP canister with EVAP canister vent control valve attached.
The weight should be less than 1.8 kg (4.0 lb).
OK or NG
OK
©
GO TO 2.
NG
©
GO TO 3.
2
CHECK IF EVAP CANISTER SATURATED WITH WATER
Does water drain from the EVAP canister?
SEF596U
Yes or No
Yes
©
GO TO 3.
No (With CONSULT-II)
©
GO TO 6.
No (Without CONSULT-
II)
©
GO TO 7.
3
REPLACE EVAP CANISTER
Replace EVAP canister with a new one.
©
GO TO 4.
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION
On Board Refueling Vapor Recovery (ORVR) (Cont’d)
EC-44
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