P0455

P0455 EVAP Control System

On Board Diagnosis Logic

This diagnosis detects a very large leak (fuel filler cap fell off etc.) in EVAP system between the fuel tank and EVAP canister purge volume control solenoid valve.









CAUTION:

- Use only a genuine 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 rubber tube as a replacement.

DTC Confirmation Procedure

CAUTION:

Never remove fuel filler cap during the DTC Confirmation Procedure.

NOTE:

- Check that EVAP hoses are connected to EVAP canister purge volume control solenoid valve properly.
- If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.

1 Turn ignition switch OFF and wait at least 10 seconds.
2 Turn ignition switch ON.
3 Turn ignition switch OFF and wait at least 10 seconds.

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.
- Open engine hood before conducting the following procedures.

with SDT

1) Tighten fuel filler cap securely until ratcheting sound is heard.
2) Turn ignition switch ON.
3) Turn ignition switch OFF and wait at least 10 seconds.
4) Turn ignition switch ON and select "Data list" mode with SDT.
5) Check that the following conditions are met.

COOLAN TEMP/S: 0 - 70 °C (32 - 158 °F)

INT/A TEMP SE: 0 - 60 °C (32 - 140 °F)
6) Select "EVP V/S LEAK P0456/P1456" of "EVAPORATIVE SYSTEM" in "DTC work support" mode with SDT.

Follow the instructions displayed.

NOTE:
If the engine speed cannot be maintained within the range displayed on the SDT screen, go to [Basic Inspection] Basic Inspection.

7) Check that "OK" is displayed.

If "NG" is displayed, select "DTC check" mode and check that "EVAP GROSS LEAK [P0455]" is displayed. If it is displayed, refer to "Diagnosis Procedure".

If P0442 is displayed, perform Diagnostic Procedure for DTC P0442 [P0442 EVAP Control System] P0442.

with GST

NOTE:

Be sure to read the explanation of [How to Set SRT Code: SRT Set Driving Pattern] How to Set SRT Code SRT Set Driving Pattern before driving vehicle.

1) Start engine.
2) Drive vehicle according to [Driving Pattern] Driving Pattern.
3) Stop vehicle.
4) Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
5) Select Service $07 with GST.
- If P0455 is displayed on the screen, go to "Diagnosis Procedure".
- If P0442 is displayed on the screen, go to [P0442 EVAP Control System] P0442.
- If P0441 is displayed on the screen, go to [P0441 EVAP Control System] P0441.

Diagnosis Procedure

1. CHECK FUEL FILLER CAP DESIGN

1 Turn ignition switch OFF.
2 Check for genuine fuel filler cap design.

OK or NG
OK
GO TO 2.
NG
Replace with genuine fuel filler cap.

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 ratcheting 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

Refer to [Evaporative Emission System: Description [VQ40DE] Description and Operation ].

OK or NG
OK
GO TO 5.
NG
Replace fuel filler cap with a genuine one.

5. CHECK EVAP PURGE LINE

Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks, improper connection or disconnection.

Refer to [Evaporative Emission System: Description [VQ40DE] Description and Operation ].

OK or NG
OK
GO TO 6.
NG
Repair or reconnect the hose.

6. CLEAN EVAP PURGE LINE

Clean EVAP purge line (pipe and rubber tube) using air blower.


GO TO 7.

7. CHECK EVAP CANISTER VENT CONTROL VALVE

Check the following.
- EVAP canister vent control valve is installed properly.
Refer to [EVAP Canister: Removal and Installation] Service and Repair.
- EVAP canister vent control valve.
Refer to [EVAP Canister: Component Inspection] Testing and Inspection.

OK or NG
OK
GO TO 8.
NG
Repair or replace EVAP canister vent control valve and O-ring.

8. INSTALL THE PRESSURE PUMP

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






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






With SDT
GO TO 9.
Without SDT
GO TO 10.

9. CHECK FOR EVAP LEAK

With SDT
1 Turn ignition switch ON.
2 Select "EVAP SYSTEM CLOSE" of "Utility" mode with SDT.
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.
- Never 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.





Refer to [Evaporative Emission System: Description [VQ40DE] Description and Operation ].

OK or NG
OK
GO TO 11.
NG
Repair or replace.

10. CHECK FOR EVAP LEAK

Without SDT
1 Turn ignition switch OFF.
2 Apply 12 volts DC to EVAP canister vent control valve (1). The valve will close. (Continue to apply 12 volts until the end of test.)





- EVAP control system pressure sensor (2)
- Drain filter (3)
- EVAP canister (4)
- : Vehicle front
1 Pressurize the EVAP line using pressure pump with 1.38 to 2.76 kPa (0.014 to 0.028 kg/cm2, 0.2 to 0.4 psi), then remove pump and EVAP service port adapter.

CAUTION:
- Never use compressed air or a high pressure pump.
- Never exceed 4.12 kPa (0.042 kg/cm2, 0.6 psi) of pressure in the system.

2 Using EVAP leak detector, locate the EVAP leak. For the leak detector, refer to the instruction manual for more details. Refer to [Evaporative Emission System: Description [VQ40DE] Description and Operation ].






OK or NG
OK
GO TO 12.
NG
Repair or replace.

11. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

With SDT
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 SDT screen to increase "PURG VOL CONT/V" opening to 100%.
5 Check vacuum hose for vacuum when revving engine up to 2,000 rpm.

OK or NG
OK
GO TO 14.
NG
GO TO 13.

12. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

Without SDT
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.






OK or NG
OK
GO TO 15.
NG
GO TO 13.

13. CHECK VACUUM HOSE

Check vacuum hoses for clogging or disconnection. Refer to [Evaporative Emission System: Description [VQ40DE] Description and Operation ].

OK or NG
OK (With SDT)
GO TO 14.
OK (Without SDT)
GO TO 15.
NG
ERROR! Unknown action!Repair or reconnect the hose.

14. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With SDT
1 Start engine.
2 Perform "PURG VOL CONT/V" in "Active test" mode with SDT. Check that engine speed varies according to the valve opening.

OK or NG
OK
GO TO 16.
NG
GO TO 15.

15. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to [P0444, P0445 EVAP Canister Purge Volume Control Solenoid Valve] P0444.

OK or NG
OK
GO TO 16.
NG
Replace EVAP canister purge volume control solenoid valve. Refer to [Intake Manifold Collector: Exploded View] Intake Manifold Collector Exploded View.

16. CHECK FUEL TANK TEMPERATURE SENSOR

Refer to [P0181 FTT Sensor] P0181.

OK or NG
OK
GO TO 17.
NG
Replace fuel level sensor unit. Refer to [Fuel Level Sensor Unit, Fuel Filter and Fuel Pump Assembly: Removal and Installation] Removal and Replacement.

17. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to [P0452 EVAP Control System Pressure Sensor] P0452.

OK or NG
OK
GO TO 18.
NG
Replace EVAP control system pressure sensor. Refer to [EVAP Canister: Removal and Installation] Service and Repair.

18. CHECK EVAP/ORVR LINE

Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kink, looseness and improper connection. For location, refer to [On Board Refueling Vapor Recovery (ORVR) Circuit Check] On Board Refueling Vapor Recovery (ORVR) Circuit Check.

OK or NG
OK
GO TO 19.
NG
Repair or replace hoses and tubes.

19. 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 20.
NG
Repair or replace hose, tube or filler neck tube. Refer to [Fuel Tank: Removal and Installation] Service and Repair.

20. CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to [On Board Refueling Vapor Recovery (ORVR) Circuit Check] On Board Refueling Vapor Recovery (ORVR) Circuit Check.

OK or NG
OK
GO TO 21.
NG
Replace refueling EVAP vapor cut valve with fuel tank. Refer to [Fuel Tank: Removal and Installation] Service and Repair.

21. CHECK INTERMITTENT INCIDENT

Refer to [Service Information for Electrical Incident: Intermittent Incident] Service Information for Electrical Incident: Intermittent Incident.


INSPECTION END

Component Inspection

Fuel Tank Vacuum Relief Valve (Built Into Fuel Filler Cap)

1) Wipe clean valve housing.





2) Check valve opening pressure and vacuum.











3) If out of specification, replace fuel filler cap as an assembly.

CAUTION:

Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may illuminate.