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.
|
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
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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:
|
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:
Passenger Compartment Temperature Sensor Removal/Installation [Full Auto Air
Conditioner]
1. Disconnect the negative battery cable..
2. Remove the following parts:
a. Front scuff plate (driver-side).
b. Front side trim (driver-side).
c. Switch panel.
d. Decoration panel.
e. Shift lever knob (MTX).
f. Front console box.
g. Shift panel.
h. Upper panel.
i. Rear console. ...
High Pressure Fuel Pump Inspection
NOTE:
The following vacuum values are indicated by relative pressure from the fuel
pressure sensor.
1. Verify that the fuel pressure sensor is normal..
2. Connect the M-MDS to the DLC-2.
3. Switch the ignition ON (engine off).
4. Select the “FUEL_PRES”, “LOAD” and “R ...
Accelerator Pedal, Kickdown Switch [Skyactiv G 2.0]
Purpose, Function
The driver's intentions are transmitted to the PCM via the accelerator pedal.
Kickdown switch (ATX) (Applied VIN (assumed): JM3 KE2*E*D# 148107?)
If the accelerator pedal is depressed carelessly, kickdown control will be
implemented based on the accelera ...
