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:
Rear Drive Shaft
Purpose, Function
Engine noise and vibration have been reduced due to adoption of a bell joint
on the wheel side of the constant velocity joint.
A low noise and vibration double offset joint with low slide resistance has
been adopted for the differential side of the constant vel ...
Side Air Bag Module Removal/Installation [Standard Deployment Control System]
WARNING:
Handling the air bag module improperly can accidentally operate (deploy)
the air bag module, which may seriously injure you. Read the air bag system
service warnings and cautions before handling the air bag module..
If the side air bag module is installed with debris i ...
Accelerator Pedal Position (App) Sensor
Purpose/Function
Detects the accelerator pedal depression amount as basic information for
mainly determining the throttle valve opening.
Detects the accelerator pedal depression amount and inputs it to the PCM
as an accelerator pedal opening angle signal.
Construction
...
