Pressure Regulator Control Solenoid

Disconnect vacuum hose from pressure regulator control solenoid. Blow air through solenoid port "A". See Fig 1 . Ensure air flows through port "B". Disconnect solenoid valve electrical connector. Connect 12 volts and ground to solenoid terminals. Blow air through solenoid port "A". Air should flow through valve air filter. Replace solenoid as necessary.

Fig 1: Testing Solenoid

Courtesy of MAZDA MOTORS CORP.