Evaporative Emissions System: Testing and Inspection

EVAP Leak Check [VQ40DE]

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 EVAP system.

NOTE:

- Never start engine.
- Improper installation of EVAP service port adapter to the EVAP service port may cause a leak.

with SDT

1 Attach the EVAP service port adapter securely to the EVAP service port.
2 Also attach the pressure pump and hose to the EVAP service port adapter.
3 Turn ignition switch ON.
4 Select the "EVAP SYSTEM CLOSE" of "Utility" mode with SDT.
5 Touch "START". A bar graph (Pressure indicating display) will appear on the screen.
6 Apply positive pressure to the EVAP system until the pressure indicator reaches the middle of the bar graph.
7 Remove EVAP service port adapter and hose with pressure pump.
8 Locate the leak using a leak detector. Refer to [Evaporative Emission System: Description [VQ40DE] Description and Operation ].






without SDT

1 Attach the EVAP service port adapter securely to the EVAP service port.





2 Also attach the pressure pump with pressure gauge to the EVAP service port adapter.
3 Apply battery voltage between the terminals of EVAP canister vent control valve (3) to make a closed EVAP system.






- Fuel filler pipe (top of frame view) (1)
- EVAP control system pressure sensor (2)
- EVAP canister (4)
- Drain filter (5)
- : Vehicle front

1 To locate the leak, deliver positive pressure to the EVAP system until pressure gauge points reach 1.38 to 2.76 kPa (0.014 to 0.028 kg/cm2, 0.2 to 0.4 psi).
2 Remove EVAP service port adapter and hose with pressure pump.
3 Locate the leak using a leak detector. Refer to [Evaporative Emission System: Description [VQ40DE] Description and Operation ].