System Tests: Corolla
Disconnect hoses from top of HAC valve and blow through each hose. Air should flow freely to carburetor. Blow through check valve. Air should pass from white to black side, but not in the other direction.
Disconnect hoses from top of HAC valve and blow through each hose. Air should flow freely to carburetor. Blow through check valve. Air should pass from white to black side, but not in the other direction.