Air Valve System
WARNING: This page is about a different car, the 1994 Mazda MX-6 and 1994 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
Connect jumper wire between diagnostic connector terminals TEN and GND. Connect tachometer to diagnostic connector terminal IG. See Figure . Start engine. Idle speed should decrease as engine reaches normal operating temperature. Replace valve as necessary.