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 Drive Shaft Inspection
1. Inspect each connecting part for looseness.
Tighten or replace parts if necessary.
2. Inspect the dust boot on the drive shaft for cracks, damage, leaking grease,
and looseness in the boot band.
3. Inspect the drive shaft for bends, cracks, and wear in the joints or ...
Rear Coil Spring Removal/Installation
WARNING:
Be careful not to allow the coil spring to fly off when removing/installing
the coil spring. Otherwise, the coil spring could fly off and cause serious
injury or death, or damage to the vehicle.
1. When working on the left side of the vehicle, disconnect the auto lev ...
Throttle Body
Purpose, Function
Opens/closes the throttle valve to adjust the amount of air supplied to the
cylinder.
Opens/closes the throttle valve according to the control signal from the
PCM.
Construction
The throttle body is installed to the intake manifold.
Th ...
