Evaporative Check Valve: Testing and Inspection

BLACK/YELLOW PORT




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


BLACK/BLUE PORT
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.