Infiniti G35 (V35) Sedan. Manual — part 532
EC-274
< COMPONENT DIAGNOSIS >
[VQ35HR]
P0442 EVAP CONTROL SYSTEM
P0442 EVAP CONTROL SYSTEM
DTC Logic
INFOID:0000000000956656
DTC DETECTION LOGIC
NOTE:
If DTC P0442 is displayed with DTC P0456, first perform the trouble diagnosis for DTC P0456. Refer to
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.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0442
EVAP 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
P0442 EVAP CONTROL SYSTEM
EC-275
< COMPONENT DIAGNOSIS >
[VQ35HR]
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• Use only a genuine NISSAN rubber tube as a replacement.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
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:
• Perform “DTC WORK SUPPORT” when the fuel level is between 1/4 and 3/4 full, and vehicle is placed
on flat level surface.
• Always perform test at a temperature of 0 to 30
°
C (32 to 86
°
F).
NOTE:
Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid valve
properly.
Do you have CONSULT-III?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1.
Turn ignition switch ON.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
4.
Make sure that the following conditions are met.
COOLAN TEMP/S: 0 - 70
°
C (32 - 158
°
F)
INT/A TEMP SE: 0 - 30
°
C (32 - 86
°
F)
5.
Select “EVAP SML LEAK P0442/P1442” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode
with CONSULT-III.
Follow the instruction displayed.
NOTE:
If the engine speed cannot be maintained within the range displayed on the CONSULT-III screen, go to
EC-12, "BASIC INSPECTION : Special Repair Requirement"
.
Which is displayed on CONSULT-III screen?
OK
>> INSPECTION END
NG
>> Go to
3.
PERFORM DTC CONFIRMATION PROCEDURE
With GST
NOTE:
Be sure to read the explanation of Driving Pattern in
before driving vehicle.
1.
Start engine.
2.
Drive vehicle according to Driving Pattern.
3.
Stop vehicle.
4.
Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
5.
Check 1st trip DTC.
Is 1st trip DTC displayed?
YES-1 >> P0441: Go to
YES-2 >> P0442: Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000000956657
1.
CHECK FUEL FILLER CAP DESIGN
1.
Turn ignition switch OFF.
EC-276
< COMPONENT DIAGNOSIS >
[VQ35HR]
P0442 EVAP CONTROL SYSTEM
2.
Check for genuine NISSAN fuel filler cap design.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace with genuine NISSAN fuel filler cap.
2.
CHECK FUEL FILLER CAP INSTALLATION
Check that the cap is tightened properly by rotating the cap clockwise.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Open fuel filler cap, then clean cap and fuel filler neck threads using air blower. Retighten until
ratcheting sound is heard.
3.
CHECK FUEL FILLER CAP FUNCTION
Check for air releasing sound while opening the fuel filler cap.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
CHECK FUEL TANK VACUUM RELIEF VALVE
EC-279, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace fuel filler cap with a genuine one.
5.
CHECK FOR EVAP LEAK
.
Is there any leak in EVAP line?
YES
>> Repair or replace.
NO
>> GO TO 6.
6.
CHECK EVAP CANISTER VENT CONTROL VALVE
Check the following.
• EVAP canister vent control valve is installed properly.
EC-546, "Removal and Installation"
.
• EVAP canister vent control valve.
EC-290, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace EVAP canister vent control valve and O-ring.
7.
CHECK IF EVAP CANISTER SATURATED WITH WATER
1.
Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
SEF915U
P0442 EVAP CONTROL SYSTEM
EC-277
< COMPONENT DIAGNOSIS >
[VQ35HR]
C
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2.
Check if water will drain from EVAP canister (1).
Does water drain from the EVAP canister?
YES
>> GO TO 8.
NO-1
>> With CONSULT-III: GO TO 10.
NO-2
>> Without CONSULT-III: GO TO 11.
8.
CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.1 kg (4.6 lb).
Is the inspection result normal?
YES-1 >> With CONSULT-III: GO TO 10.
YES-2 >> Without CONSULT-III: GO TO 11.
NO
>> GO TO 9.
9.
DETECT MALFUNCTIONING PART
Check the following.
• EVAP canister for damage
• EVAP hose between EVAP canister and vehicle frame for clogging or poor connection
>> Repair hose or replace EVAP canister.
10.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT-III
1.
Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP ser-
vice port.
2.
Start engine and let it idle.
3.
Select “PURG VOL CONT/V” in “ACTIVE TEST” mode.
4.
Touch “Qu” on CONSULT-III screen to increase “PURG VOL CONT/V” opening to 100%.
5.
Check vacuum hose for vacuum.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> GO TO 12.
11.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
Without CONSULT-III
1.
Start engine and warm it up to normal operating temperature.
2.
Stop engine.
3.
Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP ser-
vice port.
4.
Start engine and let it idle for at least 80 seconds.
5.
Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> GO TO 12.
12.
CHECK VACUUM HOSE
Check vacuum hoses for clogging or disconnection. Refer to
2
: EVAP canister vent control valve
PBIB2731E
Vacuum should exist.
Vacuum should exist.
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