Evaporative Check Valve: Testing and Inspection

1. REMOVE CHECK VALVE.
- Disconnect the grommet on the check valve from the bracket.
- Remove the check valve from the hose and on the charcoal canister.
- Remove the grommet from the check valve.





2. INSPECT CHECK VALVE.
- Check that air flows from the yellow port to the black port.
- Check that air does not flow from the black port to the yellow port.
- If operation is not as specified, replace the check valve.





3. REINSTALL CHECK VALVE.

HINT: Reinstall the check valve with the black port facing the charcoal canister side.

- Install the grommet to the check valve.
- Install the check valve to the hose end on the charcoal canister.
- Install the grommet on the check valve to the bracket.





1. REMOVE CHECK VALVE.





2. INSPECT CHECK VALVE.
- Check that air flows from the blue port to the black port.
- Check that air does not flow from the black port to the blue port.
- If operation is not as specified, replace the check valve.





3. REINSTALL CHECK VALVE.

HINT: Install the check valve with the black port facing the port P side of the throttle body.