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:
Relay Inspection
Relay Type
Connector type
Part name
Type A
TNS relay
A/C relay
Headlight HI relay
Headlight LO relay
Headlight LO relay (LH)
Horn relay
ACC rel ...
Air Mix Actuator [Full Auto Air Conditioner]
Purpose
The air mix actuator moves the air mix door in the A/C unit to adjust the
temperature of the air blown from the air vent.
Function
Door open/close function
The air mix actuator drives the motor based on the signals from the climate
control unit and moves the air mi ...
Power Brake Unit Removal/Installation
CAUTION:
Once the brake switch clearance has automatically been adjusted, it cannot
be adjusted again. Therefore, replace the switch with a new one when replacing
the power brake unit or performing any procedure that changes the pedal stroke.
1. Remove the battery and battery tra ...
