2004 INFINITI QX56 Factory Service Manual

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Page 1513 of 3371

INFINITI QX56 2004 Factory Service Manual EC-322Revision: August 2007
DTC P0455 EVAP CONTROL SYSTEM
2004 QX56
12. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
Without CONSULT-II
1. Start engine and warm it up to normal o

Page 1514 of 3371

INFINITI QX56 2004 Factory Service Manual DTC P0455 EVAP CONTROL SYSTEM
EC-323
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17. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to EC-301, "
Component Inspection" .
OK or NG
OK >> G

Page 1515 of 3371

INFINITI QX56 2004 Factory Service Manual EC-324Revision: August 2007
DTC P0456 EVAP CONTROL SYSTEM
2004 QX56
DTC P0456 EVAP CONTROL SYSTEMPFP:14950
On Board Diagnosis LogicUBS00H5T
This diagnosis detects very small leaks in the EVAP line bet

Page 1516 of 3371

INFINITI QX56 2004 Factory Service Manual DTC P0456 EVAP CONTROL SYSTEM
EC-325
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CAUTION:
Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is u

DTC P0456 EVAP CONTROL SYSTEM
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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 ProcedureUBS00H5U
NOTE:
If DTC P0456 is displayed with P0442, first perform trouble diagnosis for DTC P0456.
After repair, make sure that the hoses and clips are installed properly.
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait
at least 10 seconds before conducting the next test.
TESTING CONDITION:
Open engine hood before conducting following procedure.
If any of following conditions are met just before the DTC confirmation procedure, leave the vehi-
cle for more than 1 hour.
–Fuel filler cap is removed.
–Fuel is refilled or drained.
–EVAP component parts is/are removed.
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-II.
2. Make sure the following conditions are met.
FUEL LEVEL SE: 0.25 - 1.4V
COOLAN TEMP/S: 0 - 32°C (32 - 90°F)
FUEL T/TMP SE: 0 - 35°C (32 - 95°F)
INT A/TEMP SE: More than 0°C (32°F)
If NG, turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle) or refilling/draining
fuel until the output voltage condition of the “FUEL LEVEL SE” meets within the range above and leave
the vehicle for more than 1 hour. Then start from step 1).
3. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
4. Select “EVAP V/S LEAK P0456/P1456” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode
with CONSULT-II.
Follow the instruction displayed.
5. Make sure that “OK” is displayed.
If “NG” is displayed, refer to EC-327, "
Diagnostic Procedure" .
NOTE:
If the engine speed cannot be maintained within the range displayed on CONSULT-II screen, go
to EC-79, "
Basic Inspection" .
Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid
valve properly.
PBIB0837E

Page 1517 of 3371

INFINITI QX56 2004 Factory Service Manual EC-326Revision: August 2007
DTC P0456 EVAP CONTROL SYSTEM
2004 QX56
Overall Function CheckUBS00H5V
WITH GST
Use this procedure to check the overall function of the EVAP very small leak function. Duri

Page 1518 of 3371

INFINITI QX56 2004 Factory Service Manual DTC P0456 EVAP CONTROL SYSTEM
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Diagnostic ProcedureUBS00H5W
1. CHECK FUEL FILLER CAP DESIGN
1. Turn ignition switch OFF.
2. Check for gen

Page 1519 of 3371

INFINITI QX56 2004 Factory Service Manual EC-328Revision: August 2007
DTC P0456 EVAP CONTROL SYSTEM
2004 QX56
5. INSTALL THE PRESSURE PUMP
To locate the EVAP leak, install EVAP service port adapter and pres-
sure pump to EVAP service port sec

Page 1520 of 3371

INFINITI QX56 2004 Factory Service Manual DTC P0456 EVAP CONTROL SYSTEM
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6. CHECK FOR EVAP LEAK
With CONSULT-II
1. Turn ignition switch ON.
2. Select “EVAP SYSTEM CLOSE” of �

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