B2000 Models
- Warm engine to normal operating temperature. Stop engine and disconnect outlet hose from bottom of air control valve. Start engine and run at idle speed. Disconnect vacuum hose from No. 1 relief valve. Air should be discharged from outlet port. Reconnect vacuum hose; air should not be discharged from outlet port.
- Disconnect and plug No. 2 relief valve vacuum hose from air control valve. Using a "T" fitting and additional tubing, install "T" between inlet manifold and evaporative shutter valve. Connect additional tubing to "T" and No. 2 relief valve so inlet manifold vacuum is applied directly to No. 2 relief valve. Air should be discharged from air control valve outlet port.
- Disconnect and plug vacuum hose at No. 2 relief valve. Air should not be discharged from air control valve outlet port. If air control valve does not respond as described, replace air control valve.
Courtesy of MAZDA MOTORS CORP.