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:
Clock Spring Adjustment [Standard Deployment Control System]
1. Set the front wheels straight ahead.
CAUTION:
The clock spring will break if over?wound. Do not forcibly turn the clock
spring.
2. Turn the clock spring clockwise until it stops.
3. Turn the clock spring counterclockwise approx. 2 turns.
4. Align the mark on the clo ...
Side Member Removal [Panel Replacement]
Symbol Mark
Removal Procedure
1. Drill the 45 locations shown in the figure.
NOTE:
When drilling, do not drill a hole all the way through or there could be
a problem when installing the new part.
2. Remove the side member. ...
Air Cleaner
Purpose, Function
Prevents engine internal damage caused by penetration of dust or foreign
material.
Construction
The air cleaner is installed in front of the battery.
The air cleaner consists of the air cleaner case, air cleaner cover, and
air cleaner element ...
