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:
Rear Brake (Disc) Inspection
Brake Judder Repair Hints
Description
1. Brake judder concern has the following 3 characteristics:
Steering wheel vibration
1. The steering wheel vibrates in the rotation direction. This characteristic
is most noticeable when applying brakes at a vehicle speed of 100—140 km/h {62.2—86.9
...
Heater Core
Purpose
The heater core heats passing air.
Function
A portion of the engine coolant is taken into the heater core to heat the
air passing through the heater core.
Construction
The heater core consists of a tube which passes engine coolant, and the heat
ra ...
Power Window Subswitch
Purpose
Each door glass except for the driver-side can be opened/closed with occupant
seated in the cabin using the power window subswitch.
Function
Manual switch
The power window subswitch switches the contact point according to the switch
operation and switches the circu ...
