POSITIVE CRANKCASE VENTILATION (PCV) VALVE INSPECTION [MZI-3.7]
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Airflow Inspection
1. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].)
2. Disconnect the PCV valve hose from the PCV valve. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE REMOVAL/INSTALLATION [MZI-3.7].)
3. Verify that there is no airflow when pressure is applied to the PCV valve using a vacuum pump.
4. Verify that there is airflow when vacuum is applied to the PCV valve.
Resistance Inspection (With PCV valve heater)
1. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].)
2. Remove the engine cover. (See ENGINE COVER REMOVAL/INSTALLATION [MZI-3.7].)
3. Disconnect the PCV valve heater control connector.
4. Measure the resistance between the PCV valve heater control terminals.
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