Mazda CX-5 Service & Repair Manual: Positive Crankcase Ventilation (PCV) System
Purpose, Outline
-
Prevents release of blow-by gas (unburnt gas) into the atmosphere.
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The intake manifold vacuum introduces blow-by gas to the intake manifold via the PCV valve and the ventilation hose.
System Diagram
Structure
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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:
Clutch Pedal Inspection [C66 M R]
NOTE:
For the clutch pedal inspection, note the following and measure each inspection
location.
Measure the center of the upper surface of the pedal pad for each inspection.
If the distance from the pedal pad to the floor covering is measured,
measure the short ...
Propeller Shaft On Vehicle Inspection
Joint Area Excessive Play Inspection
1. Shake the universal joint by hand and verify that there is no excessive play.
2. If there is any excessive play, replace the propeller shaft..
Propeller Shaft Runout Inspection
CAUTION:
Do not rotate the propeller shaft using engine force wh ...
Non Return Valve
Purpose, Function
Assures safety by preventing fuel from returning to the fuel filler opening.
Construction
The non-return valve cannot be removed as it is installed inside the fuel
tank.
2WD
AWD
A single valve type has been adopted for the non-return v ...
