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Mazda CX-5 Service & Repair Manual: Positive Crankcase Ventilation (PCV) Valve Inspection

Mazda CX-5 Service & Repair Manual / Engine / Emissions / 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 while the engine is idling.

NOTE:

3. Disconnect the negative battery cable..

4. Remove the intake manifold..

5. Remove the PCV valve and the oil separator as a single unit..

6. Verify that there is no airflow when pressure is applied to port B.


7. Verify that there is airflow when vacuum is applied to port B.

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 ...

Positive Crankcase Ventilation (PCV) Valve Removal/Installation
1. Disconnect the negative battery cable.. 2. Remove the intake manifold.. 3. Remove in the order indicated in the table. 4. Install in the reverse order of removal. 1 ...

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Refrigerant Pressure Sensor [Full Auto Air Conditioner]
Purpose The refrigerant pressure sensor detects the refrigerant pressure in the refrigerant cycle. Function The refrigerant pressure sensor converts the detected refrigerant pressure to an electric signal and sends it to the PCM. Construction The refriger ...

Rear Crossmember Removal/Installation [Awd]
WARNING: Verify that the crossmember is securely supported by a jack. If the rear crossmember falls off, it can cause serious injury or death, and damage to the vehicle. CAUTION: Performing the following procedures without first removing the rear ABS wheel-speed sensor ...

Conventional Brake System
Outline A brake pedal with an intrusion minimizing mechanism has been adopted. As a result, driver safety has been improved. A small diameter long-stroke type master cylinder has been adopted, improving operability and response. A vacuum pump has been adopted, improving ...

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