Check Valve Inspection

WARNING: This page is about a different car, the 2020 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

Remove the check valve. (See CHECK VALVE REMOVAL/INSTALLATION .)
Verify that there is no airflow when positive pressure is applied to port A.
U.S.A. and CANADA specs.

Courtesy of MAZDA MOTORS CORP.

Except U.S.A. and CANADA specs.

Courtesy of MAZDA MOTORS CORP.
- If there is airflow, replace the check valve. (See CHECK VALVE REMOVAL/INSTALLATION .)
Verify that there is no airflow when negative pressure is applied to port A.
- If there is no airflow, replace the check valve. (See CHECK VALVE REMOVAL/INSTALLATION .)