Solenoid Vacuum Control Valve

Disconnect vacuum hose between solenoid valve and air cleaner hose. Disconnect vacuum hose from solenoid valve to low temperature vacuum control valve. With ignition switch "OFF", blow orally through valve. No air should pass through valve. If air passes through valve, replace valve, turn ignition switch "ON" and recheck for air flow through valve. If air flow is present, solenoid valve and electrical supply are operating properly. If air flow cannot be felt through solenoid valve with ignition switch "ON", See SOLENOID VALVE AND SPEED SENSOR ELECTRICAL TESTS .