Leak Detection Valve: Testing and Inspection

EVAP Leakage Inspection
1. Disconnect purge hose from EVAP canister purge valve. For vehicle without ORVR system, tank pressure control valve hose from solenoid valve.
2. Plug vent hose end.
3. For vehicle without ORVR system, connect vacuum pump gauge to disconnected tank pressure control valve hose end. And apply vacuum to tank pressure control valve.
4. Apply 3.5 kPa (14.0 in Aq, 26.0 mmHg) to purge hose and seal it. After 15 sec., check to make sure that pressure is higher than 3.3 kPa (13.6 in Aq, 24.5 mmHg).
If check result is not satisfactory, locate pressure leaking point by using soap water or leak detector.
If no pressure leakage exists in vapor purge line, fuel filler cap, filler neck and etc., remove fuel tank from vehicle and check for leakage from installation face of parts installed on fuel tank and hose joint.