38.2a Disconnect the hose from the crankcase ventilation valve...
38.2b... then unscrew the valve
2. Disconnect the hose, unscrew the valve from the cover and connect the hose (38.2a and 38.2b).
3. When the engine is idling, close the valve opening with your finger. If there is no vacuum, check if the valve or hose is not clogged.
4. Stop the engine. Disconnect the valve and blow through from the threaded side. If air does not pass through the valve, replace it.