Air Control Valve
- Warm engine until operating temperature is reached. Stop engine and disconnect outlet hose from bottom of air control valve.
Courtesy of MAZDA MOTORS CORP.
- On GLC only, disconnect and plug vacuum hose (white) from No. 1 relief valve and vacuum hose (black) from No. 2 relief valve. On all models, start engine and run at idle.
- On 626 and B2000 models, disconnect vacuum hose from No. 1 relief valve. Air should be discharged from outlet on all models.
- On all models, reconnect vacuum hose to No. 1 relief valve. Air should not flow from outlet port. Using suitable tubing, connect No. 2 relief valve to vacuum source. Air should flow from outlet port. Disconnect and plug vacuum hose previously connected to No. 2 relief valve. No air should flow from outlet port. If air control valve does not operate as described, replace valve and repeat test.