P1442
On Board Diagnosis Logic
NOTE:
If DTC P0442 is displayed with P1448, perform trouble diagnosis for DTC P1448 first. (See EC-607.)
This diagnosis detects leaks in the EVAP purge line using the vapor pressure in the fuel tank.
The EVAP canister vent control valve is closed to shut the EVAP purge line. The vacuum cut valve bypass valve will then be opened to clear the line between the fuel tank and the EVAP canister purge volume control solenoid valve. The EVAP control system pressure sensor can now monitor the pressure inside the fuel tank.
If pressure increases, the ECM will check for leaks in the line between the vacuum cut valve and EVAP canister purge volume control solenoid valve.
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
NOTE:
If DTC P1442 is displayed with P1448, first perform trouble diagnosis for DTC P1448 (See EC-607).
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 to 3/4 full and vehicle is placed on flat level surface.
Open engine hood before conducting the following procedure.
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.
COOLANT TEMP/S: 0 - 70°C ( 32 - 158°F )
INITIAL TEMP SE: 0 - 30°C ( 32 - 86°F )
5) Select "EVP 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 "Basic Inspection", EC-121.
6) Make sure that "OK" is displayed.
If "NG" is displayed, refer to "Diagnostic Procedure", EC-573.
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 EC-83
before driving vehicle.
1) Start engine.
2) Drive vehicle according to "Driving Pattern", EC-83.
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", EC-83.
8) Stop vehicle.
9) Select "MODE 3" with GST.
If P1442 is displayed on the screen, go to "Diagnostic Procedure", EC-573.
If P0442 is displayed on the screen, go to "Diagnostic Procedure", EC-361.
If P0441 is displayed on the screen, go to "Diagnostic Procedure" for DTC P0441, EC-352.
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
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