P0442

DTC P0442 EVAP CONTROL SYSTEM

On Board Diagnosis Logic

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 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 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).
-Open engine hood before conducting following procedure.

WITH CONSULT

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.
4.Check 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.
Follow the instruction displayed.
NOTE:
If the engine speed cannot be maintained within the range displayed on the CONSULT screen, go to Basic Inspection.
6.Make sure that "OK" is displayed.
If "NG" is displayed, .
NOTE:
Make sure that EVAP hoses are connected to the EVAP canister purge volume control solenoid valve properly.

WITH GST

NOTE:
Be sure to read the explanation of Driving Pattern on Emission-Related Diagnostic Information before driving vehicle.
1.Start engine.
2.Drive vehicle according to Driving Pattern, Emission-Related Diagnostic Information.
3.Stop vehicle.
4.Turn ignition switch OFF and wait at least 10 seconds and then turn ignition switch ON.
5.Select Service $07 with GST.
-If P0442 is displayed on the screen, go to .
-If P0441 is displayed on the screen, go to P0441 for DTC P0441.

Diagnosis Procedure

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. Refer to
Component.

2. CHECK FUEL FILLER CAP INSTALLATION

Check that the cap is tightened properly by rotating the cap clockwise.
OK or NG
OK- GO TO 3.
NG- 1.Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
2.Retighten until reteaching sound is heard.

3. CHECK FUEL FILLER CAP FUNCTION

Check for air releasing sound while opening the fuel filler cap.
OK or NG
OK- GO TO 5.
NG- GO TO 4.

4. CHECK FUEL TANK VACUUM RELIEF VALVE

Component Tests and General Diagnostics.
OK or NG
OK- GO TO 5.
NG- Replace fuel filler cap with a genuine one. Component.

5. INSTALL THE PRESSURE PUMP

To locate the EVAP leak, install EVAP service port adapter and pressure pump to EVAP service port securely.

For the location of EVAP service port (2), Description and Operation.

NOTE:
Improper installation of the EVAP service port adapter to the
EVAP service port may cause leaking.

With CONSULT-GO TO 6.
Without CONSULT-GO TO 7.

6. CHECK FOR EVAP LEAK

With CONSULT
1.Turn ignition switch ON.
2.Select "EVAP SYSTEM CLOSE" of "WORK SUPPORT" mode with CONSULT.
3.Touch "START" and apply pressure into the EVAP line until the pressure indicator reaches the middle of the bar graph.

CAUTION:
- Never use compressed air or a high pressure pump.
- Do not exceed 4.12 kPa (0.042 kg/cm2, 0.6 psi) of pressure in the system.

2.Apply 12 volts DC to EVAP canister vent control valve. The valve will close. (Continue to apply 12 volts until the end of test.)

3.Pressurize the EVAP line using pressure pump with 1.3 to 2.7
kPa (10 to 20 mmHg, 0.39 to 0.79 inHg), then remove pump and
EVAP service port adapter.

CAUTION:
- Never use compressed air or a high pressure pump.
- Do not exceed 4.12 kPa (0.042 kg/cm2, 0.6 psi) of pressure in the system.

4.Using EVAP leak detector, locate the EVAP leak. For the leak detector, refer to the instruction manual for more details. Description and Operation.
OK or NG
OK- GO TO 8.
NG- Repair or replace.

8. CHECK DRAIN FILTER

.
OK or NG
OK- GO TO 9.
NG- Replace drain filter. Exploded View.

9. CHECK EVAP CANISTER VENT CONTROL VALVE

Check the following, - EVAP canister vent control valve is installed properly.
Removal and Installation.
- EVAP canister vent control valve.
P0447.
OK or NG
OK- GO TO 10.
NG- Repair or replace EVAP canister vent control valve and O-ring. Exploded View.

10. CHECK IF EVAP CANISTER SATURATED WITH WATER

1.Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached. Exploded View.

2.Does water drain from the EVAP canister?
Yes or No
Yes- GO TO 11.
No (With CONSULT)-GO TO 13.
No (Without CONSULT)-GO TO 14.

11. 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 1.9 kg (4.2 lb).
OK or NG
OK (With CONSULT)-GO TO 13.
OK (Without CONSULT)-GO TO 14.
NG- GO TO 12.

12. DETECT MALFUNCTIONING PART

Check the following.
- EVAP canister for damage
- EVAP hose connected to EVAP canister for clogging or poor connection
- Repair hose or replace EVAP canister. Exploded View.

13. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

With CONSULT
1.Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
2.Start engine.
3.Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode.
4.Touch "Qu" on CONSULT screen to increase "PURG VOL CONT/V" opening to 100%.
5.Check vacuum hose for vacuum.
Vacuum should exist.
OK or NG
OK- GO TO 16.
NG- GO TO 15.

14. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

Without CONSULT
1.Start engine and warm it up to normal operating temperature.
2.Stop engine.
3.Disconnect vacuum hose 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.
OK or NG
OK- GO TO 16.
NG- GO TO 15.

15. CHECK VACUUM HOSE

Check vacuum hoses for clogging or disconnection. [1][2]Diagrams.
OK or NG
OK- GO TO 16.
NG- Repair or reconnect the hose.

16. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

P0444.
OK or NG
OK- GO TO 17.
NG- Replace EVAP canister purge volume control solenoid valve. Component.

17. CHECK FUEL TANK TEMPERATURE SENSOR

P0181.
OK or NG
OK- GO TO 18.
NG- Replace fuel level sensor unit. Component.

18. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

P0451.
OK or NG
OK- GO TO 19.
NG- Replace EVAP control system pressure sensor. Exploded View.

19. CHECK EVAP PURGE LINE

Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection.
OK or NG
OK- GO TO 20.
NG- Repair or reconnect the hose.

20. CLEAN EVAP PURGE LINE

Clean EVAP purge line (pipe and rubber tube) using air blower.
- GO TO 21.

21. CHECK EVAP/ORVR LINE

Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kink, looseness and improper connection.
OK or NG
OK- GO TO 22.
NG- Repair or replace hoses and tubes.

22. CHECK RECIRCULATION LINE

Check recirculation line between filler neck tube and fuel tank for clogging, kink, cracks, looseness and improper connection.
OK or NG
OK- GO TO 23.
NG- Repair or replace hoses, tubes or filler neck tube.

23. CHECK REFUELING EVAP VAPOR CUT VALVE

Testing and Inspection.
OK or NG
OK- GO TO 24.
NG- Replace refueling EVAP vapor cut valve with fuel tank. Component.

24. CHECK FUEL LEVEL SENSOR

Refer to Fuel Level Sensor
OK or NG
OK- GO TO 25.
NG- Replace fuel level sensor unit. Component.

25. CHECK INTERMITTENT INCIDENT

Refer to Trouble Diagnosis For Intermittent Incident
-INSPECTION END

Component Inspection

DRAIN FILTER

1.Check visually for insect nests in the drain filter air inlet.
2.Check visually for cracks or flaws in the appearance.
3.Check visually for cracks or flaws in the hose.

4.Blow air into port A and check that it flows freely out of port B.
5.Block port B.
6.Blow air into port A and check that there is no leakage.
7.If NG, replace drain filter. Exploded View.