Evaporative Gas (Two-Way) Check Valve - Millenia, Protege, Protege5 & 626
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 Mazda Protege5, 2002 Mazda Protege, 2002 Mazda Millenia, 2002 Mazda MX-5 Miata, and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
Remove check valve, located at rear of vehicle by fuel filler. Using SST (49-U014-001), apply 0.99 kPa of air pressure to port "A". See Fig 1 . Air should flow from port "B". Apply air pressure to port "C". Air should flow from port "A". If not as specified, replace evaporative gas (two-way) check valve.