Mazda CX-5 Service & Repair Manual: A/C Compressor Control [Full Auto Air Conditioner]
Purpose
-
The A/C compressor control switches the A/C compressor on/off according to the vehicle environment.
Function
-
The A/C compressor control turns the A/C compressor on/off based on the climate control unit operation and signals from each sensor.
-
The A/C compressor control has automatic and manual controls.
-
The A/C compressor automatic control performs the following correction:
-
Defroster correction
A/C compressor automatic control
-
The climate control unit determines the A/C ON/OFF mode based on the ambient temperature.
-
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).
-
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.
-
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.
-
The ambient temperature calculation value is calculated based on the ambient temperature, set temperature, cabin temperature, and sunlight intensity.
-
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
-
The climate control unit switches the A/C ON/OFF mode according to the A/C switch operation.
|
A/C mode |
Operation condition |
|
|
A/C ON mode (A/C display) |
Fixed in A/C mode. |
|
|
A/C OFF mode (No display) |
Fixed in A/C OFF mode. |
|
Correction
-
Defroster correction
-
When the defroster switch is turned on, the system is switched to A/C ON mode to improve defogging.
Construction
-
The A/C compressor control consists of the parts indicated in the following table:
|
Input device |
Control part |
Output device |
|
|
|
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:
Air Filter
Purpose
The air filter removes pollen and dust in the intake air and purifies air
flowing into the cabin.
Function
The air filter removes pollen and dust using a dust collecting filter.
Construction
The air filter is installed to the blower unit.
It ...
Afs (Adaptive Front Lighting System)
Outline
The AFS is a system which enhances the range of visibility when the headlights
are turned on by pointing the optical axis of the headlights in the direction
in which the vehicle is advancing according to the steering operation.
Function
The AFS is controlled by the ...
Upper Cowl Side Reinforcement Installation [Panel Replacement]
Symbol Mark
Installation Procedure
1. When installing new parts, measure and adjust the body as necessary to conform
with standard dimensions.
2. Drill holes for the plug welding before installing the new parts.
3. After temporarily installing new parts, make sure the related parts fit p ...
