No. 1 Air Control Valve

Remove No. 1 air control valve. Connect vacuum pump to valve. Blow air into hose "A" and verify air does NOT come out of port "B". Apply 15.7 in. Hg. Blow air into hose "A" and verify air comes out of port "B". See Fig 1 .

Fig 1: Testing Air Control Valve No. 1

Courtesy of MAZDA MOTORS CORP.