P0442
P0442 EVAP CONTROL SYSTEM
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P0442 is displayed with DTC P0456, first perform the trouble diagnosis for DTC P0456. Refer to P0456.
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 volume 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 illuminate.
- If the fuel filler cap is not tightened properly, the MIL may illuminate.
- Use only a genuine NISSAN rubber tube as a replacement.
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure 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 instructions displayed on CONSULT-III screen.
NOTE:
If the engine speed cannot be maintained within the range displayed on the CONSULT-III screen, go to "BASIC INSPECTION : Special Repair Requirement".
Which is displayed on CONSULT-III screen?
OK - INSPECTION END
NG - Go to P0442.
3.PERFORM DTC CONFIRMATION PROCEDURE
With GST
NOTE:
Be sure to read the explanation of Driving Pattern in How to Set SRT Code before driving vehicle.
1. Start engine.
2. Drive vehicle according to Driving Pattern, 3. Stop vehicle.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON.
6. Turn ignition switch OFF and wait at least 10 seconds.
7. Check 1st trip DTC.
Is 1st trip DTC displayed?
YES-1 - P0441: Go to P0441.
YES-2 - P0442: Go to P0442.
NO - INSPECTION END
Diagnosis Procedure
1.CHECK FUEL FILLER CAP DESIGN
1. Turn ignition switch OFF.
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
Refer to P0442.
Is the inspection result normal?
YES - GO TO 5.
NO - Replace fuel filler cap with a genuine one.
5.CHECK FOR EVAP LEAK
Refer to Testing and Inspection.
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. Refer to Removal and Installation.
- EVAP canister vent control valve. Refer to P0447.
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 IS SATURATED WITH WATER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
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 2.2 kg (4.9 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 service 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 C/V" opening to 100%.
5. Check vacuum hose for vacuum.
Vacuum should exist.
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 service 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.
Vacuum should exist.
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 System Diagram.
Is the inspection result normal?
YES - GO TO 13.
NO - Repair or reconnect the hose.
13.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to P0443.
Is the inspection result normal?
YES - GO TO 14.
NO - Replace EVAP canister purge volume control solenoid valve.
14.CHECK FUEL TANK TEMPERATURE SENSOR
Refer to P0181.
Is the inspection result normal?
YES - GO TO 15.
NO - Replace fuel level sensor unit.
15.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to P0451.
Is the inspection result normal?
YES - GO TO 16.
NO - Replace EVAP control system pressure sensor.
16.CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection. Refer to System Diagram.
Is the inspection result normal?
YES - GO TO 17.
NO - Repair or reconnect the hose.
17.CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
- GO TO 18.
18.CHECK EVAP/ORVR LINE
Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kinks, looseness and improper connection. For location, refer to Diagnosis Procedure.
Is the inspection result normal?
YES - GO TO 19.
NO - Repair or replace hoses and tubes.
19.CHECK RECIRCULATION LINE
Check recirculation line between filler neck tube and fuel tank for clogging, kinks, cracks, looseness and improper connection.
Is the inspection result normal?
YES - GO TO 20.
NO - Repair or replace hose, tube or filler neck tube.
20.CHECK REFUELING EVAP VAPOR CUT VALVE
Refer to Component Inspection.
Is the inspection result normal?
YES - GO TO 21.
NO - Replace refueling EVAP vapor cut valve with fuel tank.
21.CHECK FUEL LEVEL SENSOR
Refer to Component Inspection.
Is the inspection result normal?
YES - GO TO 22.
NO - Replace fuel level sensor unit.
22.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
- INSPECTION END
Component Inspection
1.CHECK FUEL TANK VACUUM RELIEF VALVE
1. Turn ignition switch OFF.
2. Remove fuel filler cap.
3. Wipe clean valve housing.
4. Check valve opening pressure and vacuum.
Pressure: 15.3 - 20.0 kPa (0.156 - 0.204 kg/cm2, 2.22 -
2.90 psi
Vacuum: -6.0 to -3.3 kPa (-0.061 to -0.034 kg/cm2,
-0.87 to -0.48 psi)
Is the inspection result normal?
YES - INSPECTION END
NO - GO TO 2.
2.REPLACE FUEL FILLER CAP
Replace fuel filler cap.
CAUTION:
Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may illuminate.
- INSPECTION END