Mazda CX-5 Service & Repair Manual: Positive Crankcase Ventilation (PCV) System
Purpose, Outline
-
Prevents release of blow-by gas (unburnt gas) into the atmosphere.
-
The intake manifold vacuum introduces blow-by gas to the intake manifold via the PCV valve and the ventilation hose.
System Diagram
Structure
-
The positive crankcase ventilation system consists of the following parts:
|
Part name |
Reference |
|
PCV valve |
(See POSITIVE CRANKCASE VENTILATION (PCV) VALVE [SKYACTIV-G 2.0].) |
|
Ventilation hose |
? |
Exhaust Gas Purification System
Purpose, Outline
Purifies contaminants (HC, CO, NOx) in the exhaust gas by utilizing the chemical
reactions of the three-way catalytic converter.
System Diagram
Structure
T ...
Positive Crankcase Ventilation (PCV) Valve Inspection
Airflow Inspection
1. Disconnect the section (A) of ventilation hose shown in the figure.
2. Start the engine and verify that vacuum is applied to the end of the disconnected
ventilation hose ...
Other materials:
Turning the Engine Off
WARNING
Do not stop the engine while the vehicle is moving:
Stopping the engine while the vehicle is moving for any reason other than in
an emergency is dangerous.
Stopping the engine while the vehicle is moving will result in reduced braking
ability due to the loss of power braking, which co ...
Turn And Hazard Indicator Alarm
Purpose
The turn and hazard indicator alarm notifies the driver that a turn light
or the hazard warning lights are flashing.
Function
When the instrument cluster receives the turn signal/hazard warning indicator
light illumination request signal sent from the front body con ...
Airflow Mode Actuator [Full Auto Air Conditioner]
Purpose
The airflow mode actuator moves the mode door in the A/C unit to switch the
air vent.
Function
Door open/close function
The airflow mode actuator drives the motor based on the signal from the climate
control unit and moves the mode door to the VENT, BI-LEVEL, HEAT, ...
