Solenoid Valve

Disconnect vacuum hose from solenoid valve port "A". Blow air through port "B". See Fig 1 . Ensure air flows from valve air filter. Disconnect solenoid valve connector, and connect 12 volts and a ground to solenoid valve terminals. Blow air through valve port "B", and ensure air flows from port "A". Replace solenoid valve as necessary.

Fig 1: Testing Solenoid Valve

Courtesy of MAZDA MOTORS CORP.