Leak Detection Valve: Testing and Inspection

Tank Pressure Control Valve Inspection
1) Remove tank pressure control valve.
2) Air should pass through valve smoothly from fuel tank side (TANK mark side of tank pressure control valve) to EVAP canister side when blown hard.
3) From CAN mark side, even when blown softly, air should come out of TANK mark side.
4) If air doesn't pass through valve in step 2) or hard blow is required in step 3), replace tank pressure control valve

WARNING: DO NOT SUCK air through tank pressure control valve. Fuel vapor inside the valve is harmful.

5) Apply vacuum to vacuum port.
In this state, blow TANK mark port. Air should come out of CAN mark port.
If check result is not as described, replace tank pressure control valve.

WARNING: DO NOT SUCK air through tank pressure control valve. Fuel vapor inside the valve is harmful.

6) Install tank pressure control valve.