Mazda CX-5 Service & Repair Manual: Positive Crankcase Ventilation (PCV) Valve
Purpose, Function
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Prevents release of blow-by gas (unburnt gas) into the atmosphere.
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The PCV valve is open/closed by the intake manifold vacuum.
Construction
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The PCV valve is installed to the oil separator.
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The PCV valve consists of a spring and valve.
Operation
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When the valve is pulled by the intake manifold vacuum, blow-by gas flows to the intake manifold.
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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:
Heated Oxygen Sensor (HO2 S) Heater Control
Outline
Based on the control of the HO2S heater, a stabilized oxygen concentration
is detected even at low exhaust temperatures, and feedback control of fuel injection
even at cold engine start is made possible for improved cold temperature exhaust
emission performance.
Both ...
Rear Oil Seal Replacement
1. Remove the transaxle..
2. Remove the flywheel (MTX) or the drive plate (ATX)..
3. Remove in the order indicated in the table.
4. Install in the reverse order of removal.
1
Rear oil seal
(See Rear Oil Seal Removal Note.)
(See Rear Oil Seal Installation Not ...
Differential [Fw6 A EL, Fw6 Ax EL]
Purpose/Function
The differential absorbs the difference in the rotation speed between the
left and right driving wheels so that the vehicle drives smoothly when differences
occur due to cornering or driving on rough roads.
Construction
The differential consists of the ring ...
