Relief Solenoid Valve (Non-Turbo)

1. Disconnect vacuum hoses from relief solenoid valve. Blow through port "A". See Fig 1 . Air should flow from air filter. Remove connector from solenoid valve.
2. Apply battery voltage and ground to proper terminals. See Fig 1 . Blow through port "A". Air should now flow from relief solenoid valve port "B".

Fig 1: Testing Relief & Switching Solenoid Valves

Courtesy of MAZDA MOTORS CORP.