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:
Differential Oil Temperature Sensor Inspection
WARNING:
Hot differential oil may cause severe burns. Do not perform maintenance while
differential oil is hot.
1. Disconnect the negative battery cable.
2. Disconnect the differential oil temperature sensor connector and remove the
differential oil temperature sensor.
3. Wrap ...
Fuel Filler Cap Inspection
Leakage Inspection
1. Perform the following tester (evaporative emission system tester (134-01049A))
self-test:
NOTE:
If the tester does not work correctly during self-test, refer to the tester
operators manual for more detailed procedures.
a. Verify that the gas cylinder valve ...
Fuel Gauge
Purpose
The fuel gauge notifies the user of the amount of remaining fuel.
Function
The instrument cluster calculates the amount of fuel in the fuel tank based
on the following CAN signals and displays the fuel gauge segments.
Fuel gauge sender unit voltage signal ...
