Mazda CX-5 Service & Repair Manual: Positive Crankcase Ventilation (PCV) Valve
Purpose, Function
-
Prevents release of blow-by gas (unburnt gas) into the atmosphere.
-
The PCV valve is open/closed by the intake manifold vacuum.
Construction
-
The PCV valve is installed to the oil separator.
-
The PCV valve consists of a spring and valve.
Operation
-
When the valve is pulled by the intake manifold vacuum, blow-by gas flows to the intake manifold.
-
Blow-by gas flow amount is adjusted by the spring according to the intake manifold vacuum.
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
...
Purge Solenoid Valve Inspection
Airflow Inspection
1. Disconnect the negative battery cable..
2. Remove the purge solenoid valve..
3. Inspect airflow between the ports under the following conditions.
...
Other materials:
Accelerator Pedal Position (App) Sensor
Purpose/Function
Detects the accelerator pedal depression amount as basic information for
mainly determining the throttle valve opening.
Detects the accelerator pedal depression amount and inputs it to the PCM
as an accelerator pedal opening angle signal.
Construction
...
Fuel Line Pressure Inspection
WARNING:
Fuel line spills and leakage from the pressurized fuel system are dangerous.
Fuel can ignite and cause serious injury or death and damage. To prevent this,
complete the following inspection with the engine stopped.
Fuel is very flammable liquid. If fuel spills or leaks ...
Construction Standard Values [Construction Standard Values]
Front view
No.
Measurement part
Standard values (mm {in})
Maximum values (mm {in})
Minimum values (mm {in})
Side by difference (mm {in})
A
1
5.0
{0.20}
7.0
{ ...
