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:
Hood
WARNING
Always check that the hood is closed and securely locked:
A hood that is not closed and securely locked is dangerous as it could fly open
while the vehicle is moving and block the driver's vision which could result in
a serious accident.
Opening the Hood
1. With the vehicle parke ...
Air Bag Module And Pre Tensioner Seat Belt Deployment Procedures [Two Step Deployment
Control System]
WARNING:
A live (undeployed) air bag module, pre-tensioner seat belt or lap pre-tensioner
seat belt may accidentally operate (deploy) when it is disposed of and cause
serious injury. Do not dispose of a live (undeployed) air bag module, pre-tensioner
seat belt or lap pre-tensioner s ...
Cooling Fan Motor Removal/Installation
WARNING:
Never remove the cooling system cap or loosen the radiator drain plug while
the engine is running, or when the engine and radiator are hot. Scalding engine
coolant and steam may shoot out and cause serious injury. It may also damage
the engine and cooling system.
Tu ...
