Mazda CX-5 Service & Repair Manual: Positive Crankcase Ventilation (PCV) Valve
Purpose, Function
-
Prevents release of blow-by gas (unburnt gas) into the atmosphere.
-
The PCV valve is open/closed by the intake manifold vacuum.
Construction
-
The PCV valve is installed to the oil separator.
-
The PCV valve consists of a spring and valve.
Operation
-
When the valve is pulled by the intake manifold vacuum, blow-by gas flows to the intake manifold.
-
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:
Lights On Indicator Light
Purpose
Notifies the user that the TNS or the headlights (LO) are on.
Function
Illuminates when the illumination conditions for the TNS, headlights (LO),
or parking lights are met.
When the instrument cluster receives the TNS malfunction signal sent via
CAN communic ...
Limitations to SRS Air Bag
In severe collisions such as those described previously in “SRS Air Bag Deployment
Criteria”, the applicable SRS air bag equipment will deploy. However, in some accidents,
the equipment may not deploy depending on the type of collision and its severity.
Limitations to front/near front colli ...
Anticorrosion, Sound Insulation, And Vibration Insulation
Body Sealing
Apply body sealer where necessary.
For locations where application of body sealer is difficult after installation,
apply it before installation.
Application of Undercoating
Apply an undercoat to the required location of the body.
Application ...
