2009 INFINITI QX56 Factory Service Manual

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Page 1729 of 4171

INFINITI QX56 2009 Factory Service Manual
EC-402
< COMPONENT DIAGNOSIS >[VK56DE]
ICC BRAKE SWITCH
3. Check voltage between stop lamp switch terminal 3 and ground
with CONSULT -IIl or tester.
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.
11 .DETEC

Page 1730 of 4171

INFINITI QX56 2009 Factory Service Manual
ICC BRAKE SWITCHEC-403
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
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F
G H
I
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K L
M A
EC
NP
O
3. Check continuity between ICC brake switch terminals 1 and 2
under the following conditions.
If NG, adjust IC

Page 1731 of 4171

INFINITI QX56 2009 Factory Service Manual
EC-404
< COMPONENT DIAGNOSIS >[VK56DE]
IGNITION SIGNAL
IGNITION SIGNAL
Component DescriptionINFOID:0000000003771721
IGNITION COIL & POWER TRANSISTOR
The ignition signal from the ECM is sent to and am

Page 1732 of 4171

INFINITI QX56 2009 Factory Service Manual
IGNITION SIGNALEC-405
< COMPONENT DIAGNOSIS > [VK56DE]
C
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G H
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EC
NP
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OK >>
INSPECTION END
NG >> GO TO 10.
4.CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF, w

Page 1733 of 4171

INFINITI QX56 2009 Factory Service Manual
EC-406
< COMPONENT DIAGNOSIS >[VK56DE]
IGNITION SIGNAL
Harness for open or short between condenser-1 and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connector

Page 1734 of 4171

INFINITI QX56 2009 Factory Service Manual
IGNITION SIGNALEC-407
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
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G H
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EC
NP
O
>> Repair or replace harness or connectors.
12.CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ign

Page 1735 of 4171

INFINITI QX56 2009 Factory Service Manual
EC-408
< COMPONENT DIAGNOSIS >[VK56DE]
IGNITION SIGNAL
7. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-IIl to release fuel pressure, or fuel pres-
sure applies

Page 1736 of 4171

INFINITI QX56 2009 Factory Service Manual
ON BOARD REFUELING VAPOR RECOVERY (ORVR)EC-409
< COMPONENT DIAGNOSIS > [VK56DE]
C
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G H
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EC
NP
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ON BOARD REFUELING VAPOR RECOVERY (ORVR)
System DescriptionINFOID:0000000003771724
From

ON BOARD REFUELING VAPOR RECOVERY (ORVR)EC-409
< COMPONENT DIAGNOSIS > [VK56DE]
C
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EC
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ON BOARD REFUELING VAPOR RECOVERY (ORVR)
System DescriptionINFOID:0000000003771724
From the beginning of refueling, the air and vapor insi
de the fuel tank go through refueling EVAP vapor cut
valve and EVAP/ORVR line to the EVAP canister. The v apor 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 inspectio ns 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 containe r and put lid on securely.
- Release fuel pressure from fuel line. Refer to EC-487, "Fuel Pressure Check"
.
- Disconnect battery ground cable.
Always replace O-ring when the fu el 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 a nd 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, r esulting in fuel spray and possibly a fire.
Diagnosis ProcedureINFOID:0000000003771725
SYMPTOM: FUEL ODOR FROM EVAP CANISTER IS STRONG.
1.CHECK EVAP CANISTER
1. Remove EVAP canister with EVAP canister vent c ontrol 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 l ess 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
Revision: December 20092009 QX56

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