Check Valve (Emission System) Inspection

WARNING: This page is about a different variant/trim than selected.

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 (EMISSION SYSTEM) REMOVAL/INSTALLATION .)
Ejector side

Courtesy of MAZDA MOTORS CORP.

Intake manifold side

Courtesy of MAZDA MOTORS CORP.

Fuel tank side (U.S.A. and CANADA)

Courtesy of MAZDA MOTORS CORP.
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 (EMISSION SYSTEM) REMOVAL/INSTALLATION .)