2007 INFINITI QX56 Factory Service Manual

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Page 1441 of 3061

INFINITI QX56 2007 Factory Service Manual EC-358
< SERVICE INFORMATION >
DTC P0441 EVAP CONTROL SYSTEM
OK >> GO TO 10.
NG >> Replace EVAP control system pressure sensor.
10.CHECK RUBBER TUBE FOR CLOGGING
1. Disconnect rubber tube connected to

Page 1442 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0442 EVAP CONTROL SYSTEM
EC-359
< SERVICE INFORMATION >
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DTC P0442 EVAP CONTROL SYSTEM
On Board Diagnosis LogicINFOID:0000000003531856
This diagnosis detects leaks

DTC P0442 EVAP CONTROL SYSTEM
EC-359
< SERVICE INFORMATION >
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DTC P0442 EVAP CONTROL SYSTEM
On Board Diagnosis LogicINFOID:0000000003531856
This diagnosis detects leaks in the EVAP purge line using engine intake manifold vacuum.
If pressure does not increase, the ECM will check for leaks in the line between the fuel tank and EVAP canister
purge volume control solenoid valve, under the following “Vacuum test” conditions.
The EVAP canister vent control valve is closed to shut the EVAP purge line off. The EVAP canister purge vol-
ume control solenoid valve will then be opened to depressurize the EVAP purge line using intake manifold
vacuum. After this occurs, the EVAP canister purge volume control solenoid valve will be closed.
CAUTION:
• Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the
MIL may come on.
• If the fuel filler cap is not tightened properly, the MIL may come on.
• Use only a genuine NISSAN rubber tube as a replacement.
DTC Confirmation ProcedureINFOID:0000000003531857
NOTE:
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0442
0442EVAP control system
small leak detected
(negative pressure)EVAP control system has a leak, EVAP
control system does not operate prop-
erly.• Incorrect fuel tank vacuum relief valve
• Incorrect fuel filler cap used
• Fuel filler cap remains open or fails to close.
• Foreign matter caught in fuel filler cap.
• Leak is in line between intake manifold and EVAP
canister purge volume control solenoid valve.
• Foreign matter caught in EVAP canister vent con-
trol valve.
• EVAP canister or fuel tank leaks
• EVAP purge line (pipe and rubber tube) leaks
• EVAP purge line rubber tube bent
• Loose or disconnected rubber tube
• EVAP canister vent control valve and the circuit
• EVAP canister purge volume control solenoid
valve and the circuit
• Fuel tank temperature sensor
• O-ring of EVAP canister vent control valve is
missing or damaged
• EVAP canister is saturated with water
• EVAP control system pressure sensor
• Fuel level sensor and the circuit
• Refueling EVAP vapor cut valve
• ORVR system leaks
PBIB1026E

Page 1443 of 3061

INFINITI QX56 2007 Factory Service Manual EC-360
< SERVICE INFORMATION >
DTC P0442 EVAP CONTROL SYSTEM
• If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conduc

Page 1444 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0442 EVAP CONTROL SYSTEM
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2. Check for genuine NISSAN fuel filler cap design.
OK or NG
OK >> GO TO 2.
NG >> Replace with genuine NISS

Page 1445 of 3061

INFINITI QX56 2007 Factory Service Manual EC-362
< SERVICE INFORMATION >
DTC P0442 EVAP CONTROL SYSTEM
6.CHECK FOR EVAP LEAK
With CONSULT-II
1. Turn ignition switch ON.
2. Select “EVAP SYSTEM CLOSE” of “WORK SUPPORT” mode with CONSUL

Page 1446 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0442 EVAP CONTROL SYSTEM
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4. Using EVAP leak detector, locate the EVAP leak. For the leak
detector, refer to the instruction manual f

Page 1447 of 3061

INFINITI QX56 2007 Factory Service Manual EC-364
< SERVICE INFORMATION >
DTC P0442 EVAP CONTROL SYSTEM
3. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode.
4. Touch “Qu” on CONSULT-II screen to increase “PURG VOL
CONT/V” openin

Page 1448 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0442 EVAP CONTROL SYSTEM
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Clean EVAP purge line (pipe and rubber tube) using air blower.
>> GO TO 20.
20.CHECK EVAP/ORVR LINE
Check E

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