How to Detect EVAP Leakage

EVAPORATIVE EMISSION SYSTEM


How to Detect EVAP Leakage


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:
- Do not start engine.
- Improper installation of EVAP service port adapter (commercial service tool) to the EVAP service port may cause a leakage.

WITH CONSULT-III
1. Attach the EVAP service port adapter (commercial service tool) securely to the EVAP service port.





2. Also attach the pressure pump and hose to the EVAP service port adapter (commercial service tool).
3. Turn ignition switch ON.
4. Select the "EVAP SYSTEM CLOSE" of "WORK SUPPORT
MODE" with CONSULT-III.
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 (commercial service tool) and hose with pressure pump.
8. Locate the leakage using a leak detector (commercial service tool). Refer to Description and Operation.

WITHOUT CONSULT-III
1. Attach the EVAP service port adapter (commercial service tool) 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 (1) to make a closed EVAP system.





- Illustration shows the view from under the vehicle
- : Vehicle front
- EVAP canister (2)
- EVAP control system pressure sensor (3)
4. To locate the leakage, 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).
5. Remove EVAP service port adapter (commercial service tool)
and hose with pressure pump.
6. Locate the leakage using a leak detector (commercial service tool). Refer to Description and Operation.