Scan Tool Testing and Procedures

How to Detect Fuel Vapor Leakage




EVAP SERVICE PORT
Positive pressure is delivered to the EVAP system through the EVAP service port. If fuel vapor leakage in the EVAP system occurs, use a leak detector to locate the leak.

How to Detect Fuel Vapor Leakage

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

NOTE:
- Do not start engine.
- Improper installation of EVAP service port adapter to the EVAP service port may cause a leak.

WITH CONSULT-II
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 WORK SUPPORT MODE with CONSULT-II.
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 DIAGRAMS".

WITHOUT CONSULT-II




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 to between the terminals of both EVAP canister vent control valve and vacuum cut valve bypass valve to make a closed EVAP system.
4. 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/sq.cm, 0.2 to 0.4 psi).
5. Remove EVAP service port adapter and hose with pressure pump.
6. Locate the leak using a leak detector. Refer to "EVAPORATIVE EMISSION DIAGRAMS".