2007 INFINITI QX56 Factory Service Manual

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Page 1121 of 3061

INFINITI QX56 2007 Factory Service Manual EC-38
< SERVICE INFORMATION >
EVAPORATIVE EMISSION SYSTEM
WITH CONSULT-II
1. Attach the EVAP service port adapter securely to the EVAP service port.
2. Also attach the pressure pump and hose to the E

Page 1122 of 3061

INFINITI QX56 2007 Factory Service Manual EVAPORATIVE EMISSION SYSTEM
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< SERVICE INFORMATION >
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2. Also attach the pressure pump with pressure gauge to the EVAP
service port adapter.
3. Apply battery voltag

Page 1123 of 3061

INFINITI QX56 2007 Factory Service Manual EC-40
< SERVICE INFORMATION >
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
System DescriptionINFOID:0000000003531598
From the beginning of refueling, the air and v

EC-40
< SERVICE INFORMATION >
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
System DescriptionINFOID:0000000003531598
From the beginning of refueling, the air and vapor inside the fuel tank go through refueling EVAP vapor cut
valve and EVAP/ORVR 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.
WARNING:
When conducting inspections below, be sure to observe the following:
• Put a “CAUTION: FLAMMABLE” sign in workshop.
• Do not smoke while servicing fuel system. Keep open flames and sparks away from work area.
• Be sure to furnish the workshop with a CO
2 fire extinguisher.
CAUTION:
• Before removing fuel line parts, carry out the following procedures:
- Put drained fuel in an explosion-proof container and put lid on securely.
- Release fuel pressure from fuel line. Refer to EC-80, "
Fuel Pressure Check" .
- Disconnect battery ground cable.
• Always replace O-ring when the fuel gauge retainer is removed.
• Do not kink or twist hose and tube when they are installed.
• Do not tighten hose and clamps excessively to avoid damaging hoses.
• After installation, run engine and check for fuel leaks at connection.
• 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.
Diagnosis ProcedureINFOID:0000000003531599
SYMPTOM: FUEL ODOR FROM EVAP CANISTER IS STRONG.
1.CHECK EVAP CANISTER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
2. Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.5 kg (5.5 lb).
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2.CHECK IF EVAP CANISTER SATURATED WITH WATER
PBIB1068E

Page 1124 of 3061

INFINITI QX56 2007 Factory Service Manual ON BOARD REFUELING VAPOR RECOVERY (ORVR)
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< SERVICE INFORMATION >
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Does water drain from the EVAP canister?
Ye s o r N o
Yes >> GO TO 3.
No >> GO TO 5.
3.REPLACE

Page 1125 of 3061

INFINITI QX56 2007 Factory Service Manual EC-42
< SERVICE INFORMATION >
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
4.DETECT MALFUNCTIONING PART
Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.
>> Repa

Page 1126 of 3061

INFINITI QX56 2007 Factory Service Manual ON BOARD REFUELING VAPOR RECOVERY (ORVR)
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< SERVICE INFORMATION >
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2. Drain fuel from the tank as follows:
a. Remove fuel feed hose located on the fuel gauge retain

Page 1127 of 3061

INFINITI QX56 2007 Factory Service Manual EC-44
< SERVICE INFORMATION >
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
d. Apply vacuum pressure to hose end [−13.3 kPa (−100 mmHg, −3.94 inHg)] with fuel gauge retainer
remaining open and check

Page 1128 of 3061

INFINITI QX56 2007 Factory Service Manual POSITIVE CRANKCASE VENTILATION
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< SERVICE INFORMATION >
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POSITIVE CRANKCASE VENTILATION
DescriptionINFOID:0000000003531601
SYSTEM DESCRIPTION
This system returns bl

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