Check Valve (Intake-Air System) Inspection
- Verify that there is airflow through port B when pressure is applied from port A.
- If there is no airflow, replace the check valve. (See CHECK VALVE (INTAKE-AIR SYSTEM) REMOVAL/INSTALLATION .)
- Verify that there is no airflow through port A when pressure is applied from port B.
- If there is airflow, replace the check valve. (See CHECK VALVE (INTAKE-AIR SYSTEM) REMOVAL/INSTALLATION .)