Infiniti F50. Manual — part 422
DTC P0441 EVAP CONTROL SYSTEM
EC-329
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8.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1.
Disconnect EVAP control system pressure sensor harness connector.
2.
Check connectors for water.
OK or NG
OK
>> GO TO 9.
NG
>> Replace EVAP control system pressure sensor.
9.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION
Refer to “DTC Confirmation Procedure” for DTC P0452
, P0453
.
OK or NG
OK
>> GO TO 10.
NG
>> Replace EVAP control system pressure sensor.
10.
CHECK RUBBER TUBE FOR CLOGGING
1.
Disconnect rubber tube connected to EVAP canister vent control valve.
2.
Check the rubber tube for clogging.
OK or NG
OK
>> GO TO 11.
NG
>> Clean the rubber tube using an air blower.
11.
CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to
EC-551, "Component Inspection"
OK or NG
OK
>> GO TO 12.
NG
>> Replace EVAP canister vent control valve.
12.
CHECK EVAP PURGE LINE
Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks.
Refer to
EC-685, "EVAPORATIVE EMISSION LINE DRAWING"
.
OK or NG
OK
>> GO TO 13.
NG
>> Replace it.
13.
CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
>> GO TO 14.
14.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Water should not exist.
EC-330
DTC P0442 EVAP CONTROL SYSTEM
DTC P0442 EVAP CONTROL SYSTEM
PFP:14950
On Board Diagnosis Logic
EBS00MEE
NOTE:
If DTC P0442 is displayed with P1448, first perform trouble diagnosis for DTC P1448. (See
.)
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 vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister
purge volume control solenoid valve. The EVAP canister vent control valve will then be closed to shut the
EVAP purge line off. The EVAP canister purge volume control solenoid valve is 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.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0442
0442
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
control valve.
●
EVAP canister or fuel tank leaks
●
EVAP purge line (pipe and rubber tube) leaks
●
EVAP purge line rubber tube bent
●
Blocked or bent rubber tube to EVAP control sys-
tem pressure sensor
●
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
●
Water separator
●
EVAP canister is saturated with water
●
EVAP control system pressure sensor
●
Fuel level sensor and the circuit
●
Refueling control valve
●
ORVR system leaks
SEF323U
DTC P0442 EVAP CONTROL SYSTEM
EC-331
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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 Procedure
EBS00MEF
NOTE:
●
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).
WITH CONSULT-II
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-II.
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-II.
Follow the instruction displayed.
NOTE:
If the engine speed cannot be maintained within the range displayed on the CONSULT-II screen, go to
SEF475Y
PBIB0829E
EC-332
DTC P0442 EVAP CONTROL SYSTEM
6.
Make sure that “OK” is displayed.
If “NG” is displayed, refer to
EC-332, "Diagnostic Procedure"
NOTE:
Make sure that EVAP hoses are connected to EVAP canister
purge volume control solenoid valve properly.
WITH GST
NOTE:
Be sure to read the explanation of “Driving Pattern” on
before driving vehicle.
1.
Start engine.
2.
Drive vehicle according to “Driving Pattern”,
3.
Stop vehicle.
4.
Select “MODE 1” with GST.
–
If SRT of EVAP system is not set yet, go to the following step.
–
If SRT of EVAP system is set, the result will be OK.
5.
Turn ignition switch “OFF” and wait at least 10 seconds.
6.
Start engine.
It is not necessary to cool engine down before driving.
7.
Drive vehicle again according to the “Driving Pattern”,
8.
Stop vehicle.
9.
Select “MODE 3” with GST.
–
If P0442 is displayed on the screen, go to
EC-332, "Diagnostic Procedure"
–
If P0441 is displayed on the screen, go to
EC-327, "Diagnostic Procedure"
–
If P1442 is displayed on the screen, go to
EC-531, "Diagnostic Procedure"
–
If P0441, P0442 and P1442 are not displayed on the screen, go to the following step.
10. Select “MODE 1” with GST.
–
If SRT of EVAP system is set, the result will be OK.
–
If SRT of EVAP system is not set, go to step 6.
Diagnostic Procedure
EBS00MEG
1.
CHECK FUEL FILLER CAP DESIGN
1.
Turn ignition switch “OFF”.
2.
Check for genuine NISSAN fuel filler cap design.
OK or NG
OK
>> GO TO 2.
NG
>> Replace with genuine NISSAN fuel filler cap.
SEC763C
SEF915U
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