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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 ...

Other materials:

Power Brake Unit
Purpose/Function A 9.8-inch, single diaphragm type power brake unit has been adopted, achieving compatibility between high braking performance and excellent brake feeling. Construction The power brake unit cannot be disassembled. Therefore, if there is any malfunction in th ...

Air Mix Actuator Removal/Installation [Full Auto Air Conditioner]
Driver-side 1. Disconnect the negative battery cable.. 2. Remove the following parts: a. Side wall (driver-side). b. Front heat duct (LH). 3. Disconnect the air mix actuator connector. 4. Remove the screw. 5. Remove the driver-side air mix actuator. 6. Install in the reverse order ...

Fuel Pump Control
Outline By switching the fuel pump discharge amount, reduced power consumption and improved fuel economy have been realized. The PCM determines the optimum fuel pump drive force according to the engine operation conditions, and sends the fuel pump drive signal to the fuel pump ...

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