Mazda CX-5 Service & Repair Manual: Manual Air Conditioner Control System [Manual Air Conditioner]
Outline
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The climate control unit performs the following controls based on the signals from each switch/dial and the sensor.
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A/C compressor control
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Defroster control
Block Diagram
Outline of Control System
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Manual air conditioner has the following control.
|
Control name |
Control part |
|
Climate control unit |
A/C Compressor Control
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The climate control unit sends the A/C signal to the PCM based on the signals sent from the A/C switch, airflow volume control dial, and evaporator temperature sensor.
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The PCM turns the A/C relay on/off based on the input signals from the A/C signal and A/C pressure sensor and controls the A/C compressor (magnetic clutch) operation.
A/C signal on/off control
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When the A/C switch and fan switch are turned on, the climate control unit turns the A/C signal (magnetic clutch) on/off based on the temperature of the air passing through the evaporator.
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When the fan switch and A/C switch are turned on, the climate control unit controls the surface temperature of the evaporator so that it is within a certain range to prevent the evaporator from freezing.
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When the ambient temperature is low, the climate control unit sets the A/C signal (magnetic clutch) off-temperature to low to prevent window fogging.
Defroster control
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The defroster control improves the defrosting effect.
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When the defroster switch turns on, the climate control unit fixes the air intake mode to FRESH.
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The air intake is fixed at FRESH even if it has been set to REC manually.
Magnetic Clutch Inspection [Manual Air Conditioner]
1. Connect battery to terminal A of magnetic clutch and ground to A/C compressor
body.
2. Verify that the magnetic clutch operates.
If there is any malfunction, replace the magnetic cl ...
Passenger Compartment Temperature Sensor Inspection [Full Auto Air Conditioner]
1. Measure the temperature around the passenger compartment temperature sensor
and measure the resistance between passenger compartment temperature sensor terminals
A and B.
If the charact ...
Other materials:
Active Command Modes Inspection [Front Body Control Module (Fbcm)]
1. Connect the M-MDS to the DLC-2.
2. After the vehicle is identified, select the following items from the initialization
screen of the M-MDS.
a. Select “DataLogger”.
b. Select “Modules”.
c. Select “F_BCM”.
3. Select the active command modes from the PID table.
4. Perform t ...
Power Brake Unit Inspection
NOTE:
The following inspection methods are simple inspection methods to judge the
function of the power brake unit.
If there is any malfunction in the power brake unit, replace the power brake
unit as a single unit.
Without Using SST
Operation inspection
1. With the eng ...
Outside the United States/Canada
Government regulations in the United States/Canada require that automobiles meet
specific emission regulations and safety standards. Therefore, vehicles built for
use in the United States/Canada may differ from those sold in other countries.
The differences may make it difficult or even impossi ...
