AIR Pump Switchover Valve
When AIR pump switchover valve is actuated, intake manifold vacuum is applied to air shut-off valve. Air shut-off valve opens and air supplied by air pump is directed into exhaust manifold.
When AIR pump switchover valve is actuated, intake manifold vacuum is applied to air shut-off valve. Air shut-off valve opens and air supplied by air pump is directed into exhaust manifold.