No. 1 Air Control Valve (ACV): B2200

Remove No. 1 ACV. Blow air into hose A. Ensure air does not emerge from hose B. If valve leaks, replace No. 1 ACV. Refer to Fig 1 .

Fig 1: Testing No. 1 Air Control Valve (B2200)
Courtesy of MAZDA MOTORS CORP.
With vacuum pump attached to No. 1 ACV, apply 15.6 in. Hg to valve. Blow air into hose A. Ensure air emerges from hose B. If not, replace No. 1 ACV.