POSITIVE CRANKCASE VENTILATION (PCV) VALVE INSPECTION [MZI-3.5]
AIRFLOW INSPECTION
1. Disconnect the negative battery cable. (see
BATTERY REMOVAL/INSTALLATION [MZI-3.5]
.)
2. Disconnect the PCV valve hose from the PCV valve. (See
POSITIVE CRANKCASE VENTILATION
(PCV) VALVE REMOVAL/INSTALLATION [MZI-3.5]
.)
3. Verify that there is no airflow when pressure is applied to the PCV valve using a vacuum pump.
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If there is airflow, replace the PCV valve. (See
POSITIVE CRANKCASE VENTILATION
(PCV) VALVE REMOVAL/INSTALLATION [MZI-3.5]
.)
4. Verify that there is airflow when vacuum is applied to the PCV valve.
z
If there is no airflow, replace the PCV valve. (See
POSITIVE CRANKCASE VENTILATION
(PCV) VALVE REMOVAL/INSTALLATION [MZI-3.5]
.)
RESISTANCE INSPECTION
1. Disconnect the negative battery cable. (see
BATTERY REMOVAL/INSTALLATION [MZI-3.5]
.)
2. Remove the engine cover. (see
ENGINE COVER REMOVAL/INSTALLATION [MZI-3.5]
.)
3. Disconnect the PCV valve heater control connector.
4. Measure the resistance between the PCV valve heater control terminals.
z
If within the specification, perform out the "Circuit Open/Short Inspection".
z
If not within the specification, replace the PCV valve. (See
POSITIVE CRANKCASE
VENTILATION (PCV) VALVE REMOVAL/INSTALLATION [MZI-3.5]
.)
PCV valve heater control resistance
10-35 ohm
Fig. 19: Identifying PCV Valve Heater Control Connector Terminals
Courtesy of MAZDA MOTORS CORP.
NOTE:
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The PCV valve cannot be reassembled once it is removed because the
tabs will have been broken. Inspect the PCV valve without removing it
from the vehicle.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Emission System (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:24:50 AM
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