Mazda CX-5 Service & Repair Manual: Positive Crankcase Ventilation (PCV) Valve
Purpose, Function
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Prevents release of blow-by gas (unburnt gas) into the atmosphere.
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The PCV valve is open/closed by the intake manifold vacuum.
Construction
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The PCV valve is installed to the oil separator.
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The PCV valve consists of a spring and valve.
Operation
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When the valve is pulled by the intake manifold vacuum, blow-by gas flows to the intake manifold.
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Blow-by gas flow amount is adjusted by the spring according to the intake manifold vacuum.
Positive Crankcase Ventilation (PCV) Valve Removal/Installation
1. Disconnect the negative battery cable..
2. Remove the intake manifold..
3. Remove in the order indicated in the table.
4. Install in the reverse order of removal.
1
...
Purge Solenoid Valve Inspection
Airflow Inspection
1. Disconnect the negative battery cable..
2. Remove the purge solenoid valve..
3. Inspect airflow between the ports under the following conditions.
...
Other materials:
Steering Angle Sensor Inspection
1. Remove the column cover..
2. Connect the plus (+) end of a tester to steering angle sensor terminal A and
the minus (-) end of the tester to terminal B (GND).
3. Switch the ignition ON (engine off or on).
4. Turn the steering wheel to the left and right.
5. Verify that the voltage f ...
Battery Runs Out
Jump-Starting
Jump-starting is dangerous if done incorrectly. So follow the procedure carefully.
If you feel unsure about jump-starting, we strongly recommend that you have a competent
service technician do the work.
WARNING
Follow These Precautions Carefully:
To ensure safe and correct ...
Discharge Headlight Service Warnings
Discharge Headlight Service Warnings
When replacing a discharge headlight bulb, performing the servicing with
the negative battery cable connected or in a wet work area could result in electrocution.
When replacing a discharge headlight bulb, perform the servicing under the following
...
