Mazda CX-5 Service & Repair Manual: A/C Compressor Control [Full Auto Air Conditioner]
Purpose
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The A/C compressor control switches the A/C compressor on/off according to the vehicle environment.
Function
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The A/C compressor control turns the A/C compressor on/off based on the climate control unit operation and signals from each sensor.
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The A/C compressor control has automatic and manual controls.
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The A/C compressor automatic control performs the following correction:
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Defroster correction
A/C compressor automatic control
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The climate control unit determines the A/C ON/OFF mode based on the ambient temperature.
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The climate control unit determines the A/C signal on/off according to the air conditioner operation such as A/C ON mode (A/C switch ON) or AUTO mode (AUTO switch ON).
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In A/C ON mode, the A/C signal (magnetic clutch) on/off is determined based on the ambient temperature and the temperature of the air passing through the evaporator.
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In AUTO mode, the A/C signal (magnetic clutch) on/off is determined based on the ambient temperature calculation value and the temperature of the air passing through the evaporator.
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The ambient temperature calculation value is calculated based on the ambient temperature, set temperature, cabin temperature, and sunlight intensity.
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When the ambient temperature is low, the A/C signal (magnetic clutch) OFF temperature is set lower to prevent window fogging.
A/C compressor manual control
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The climate control unit switches the A/C ON/OFF mode according to the A/C switch operation.
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A/C mode |
Operation condition |
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|
A/C ON mode (A/C display) |
Fixed in A/C mode. |
|
|
A/C OFF mode (No display) |
Fixed in A/C OFF mode. |
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Correction
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Defroster correction
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When the defroster switch is turned on, the system is switched to A/C ON mode to improve defogging.
Construction
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The A/C compressor control consists of the parts indicated in the following table:
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Input device |
Control part |
Output device |
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|
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Operation
1. The climate control determines the A/C ON/OFF based on the operations of each switch/dial and signals from each sensor which changes according to the vehicle environment.
2. The climate control unit sends the A/C signal to the PCM according to the result of the A/C ON/OFF determination and corrections.
3. When the PCM turns the A/C relay on based on the A/C signal, the magnetic clutch of the A/C compressor turns on.
A/C Compressor
Purpose
The A/C compressor circulates the refrigerant in the refrigerant cycle.
The A/C compressor compresses the gaseous refrigerant atomized by the evaporator,
and by pressurizing ...
A/C Compressor Removal/Installation
1. Disconnect the negative battery cable..
2. Discharge the refrigerant..
3. Remove the front under cover No.2..
4. Remove the drive belt..
5. Disconnect the connector.
6. Remove bolts A ...
Other materials:
Mirror Base Installation
1. Cut away all of the original sealant using a razor.
WARNING:
Using a razor with bare hands can cause injury. Always wear gloves when using
a razor.
2. Clean and degrease the ceramic coating on the glass and the base.
CAUTION:
Keep the area free of dirt and grease, and ...
Interior Care
WARNING
Do not spray water in the cabin:
Splashing water on electrical parts such as the audio unit and switches is dangerous
as it could cause a malfunction or a fire.
Dashboard Precautions
Prevent caustic solutions such as perfume and cosmetic oils from contacting the
dashboard. They will ...
Torque Sensor
Purpose/ Function
The torque sensor detects the steering torque and the steering direction,
and outputs the signal to the Electric Power Steering (EPS) control module (CM).
Construction, Operation
The Hall IC-type torque sensor is installed to the top of the steering column
...