Mazda CX-5 Service & Repair Manual: Air Intake Control [Full Auto Air Conditioner]
Purpose
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The air intake control switches the air intake port (FRESH/REC) according to the vehicle environment.
Function
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The air intake control drives the air intake actuator and switches the air intake door position according to the operations of the REC, FRESH and defroster switches and the vehicle environment.
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The air intake control has automatic and manual controls.
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The air intake automatic control performs the following correction:
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Defroster correction
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Ambient temperature correction
Air intake automatic control
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The climate control unit performs the control as follows so that the cabin temperature lowers quickly according to the cooling conditions.
1. Calculates the cabin temperature value based on the ambient temperature and sunlight intensity.
2. Compares the calculated cabin temperature value and current cabin temperature.
3. Determines the air intake mode.
Air intake manual control
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The climate control unit switches the air intake mode based on the REC/FRESH switch operation.
|
Air intake mode |
REC switch operation |
|
FRESH |
Fixed to FRESH when the FRESH switch is turned on during REC mode |
|
REC |
Fixed to REC when the RECIRCULATE switch is turned on during FRESH mode |
REC mode control under severe heat
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When the vehicle is driven at a very low speed with the A/C on under a severe heat condition, the climate control unit may change the air intake mode from FRESH to REC automatically.
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Due to this, load to the A/C compressor is reduced.
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When the air intake mode is switched to REC, the indicator on the REC switch illuminates.
Correction
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Defroster correction
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The defroster correction improves the effect of defrosting.
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The air intake is fixed at FRESH when the defroster switch is turned on.
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The air intake is fixed at FRESH even if it has been set to REC manually.
-
Ambient temperature correction
-
When the ambient temperature is 15 °C {59 °F}
or less, the air intake is fixed at FRESH to prevent window fogging.
Construction
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The air intake control consists of the parts indicated in the following table:
|
Input device |
Control part |
Output device |
|
|
|
Operation
1. The climate control determines the air intake mode based on the operations of the REC, FRESH, defroster switches and signals from each sensor which changes according to the vehicle environment.
2. The climate control unit drives the air intake actuator according to the result of the air intake mode determination and corrections.
Air Intake Actuator [Manual Air Conditioner]
Purpose
The air intake actuator moves the air intake door in the blower unit to switch
the air intake port.
Function
The air intake actuator drives the motor based on the signal ...
Intake Air System Removal/Installation
WARNING:
A hot engine and intake air system can cause severe burns. Turn off the engine
and wait until they are cool before removing the intake air system.
1. Disconnect the negative ...
Other materials:
Timing Chain, Chain Tensioner
Purpose, Function
Timing chain
The timing chain transmits the rotation force of the crankshaft to the camshaft
to perform the rotation timing of the crankshaft and camshaft.
Chain tensioner
The chain tensioner constantly maintains the timing chain tension and the
timing ch ...
Liftgate Lower Trim Removal/Installation
1. Remove the following parts:
a. Liftgate upper trim.
b. Liftgate side trim.
c. Liftgate recess.
2. Remove fasteners A.
3. Take the shaded area shown in the figure, and pull the liftgate lower trim
in the direction of the arrow in the order of (1), (2), (3), (4) and remove it while ...
Auto Light Sensor
Purpose
The auto light sensor detects the illumination level above and in front of
the vehicle and outputs it to the front body control module (FBCM).
Function
The auto-light sensor uses the upward illumination level sensor to detect
the illumination level above the vehicle ...