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:
Outer Mirror Glass Installation
1. Connect the mirror heater connectors. (with heated outer mirror)
2. Connect the blind spot monitoring (BSM) warning indicator light connector
(with blind spot monitoring system).
NOTE:
Lightly pull the blind spot monitoring (BSM) warning indicator light connector
and verify t ...
Turn And Hazard Indicator Alarm
Purpose
The turn and hazard indicator alarm notifies the driver that a turn light
or the hazard warning lights are flashing.
Function
When the instrument cluster receives the turn signal/hazard warning indicator
light illumination request signal sent from the front body con ...
Interior Lighting System
Outline
A room light control system has been adopted in which illumination time and
illumination level of the interior lights change.
The rear body control module (RBCM) performs room light control system fail-safe..
Structural View
System Wiring Diagram
...
