Mazda CX-5 Service & Repair Manual: Manual Air Conditioner Control System [Manual Air Conditioner]
Outline
-
The climate control unit performs the following controls based on the signals from each switch/dial and the sensor.
-
A/C compressor control
-
Defroster control
Block Diagram
Outline of Control System
-
Manual air conditioner has the following control.
|
Control name |
Control part |
|
Climate control unit |
A/C Compressor Control
-
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.
-
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
-
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.
-
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.
-
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
-
The defroster control improves the defrosting effect.
-
When the defroster switch turns on, the climate control unit fixes the air intake mode to FRESH.
-
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:
Clock Spring Removal/Installation [Standard Deployment Control System]
CAUTION:
If the disc on the combination switch is deformed or has foreign material
adhering to it, performance of the steering angle sensor may be reduced, causing
abnormal operation. When handling the clock spring, be careful not to deform
the disc and make sure there is no foreign ...
Returnless Fuel System
Purpose, Outline
Fuel evaporation in the fuel tank is reduced by adjusting the fuel amount
(fuel pressure) ejected from the fuel pump and preventing fuel warmed in the
engine compartment from returning.
System Diagram
2WD
AWD
Structure
The returnless fuel system ...
Heater Core
Purpose
The heater core heats passing air.
Function
A portion of the engine coolant is taken into the heater core to heat the
air passing through the heater core.
Construction
The heater core consists of a tube which passes engine coolant, and the heat
ra ...
