MANUAL AIR CONDITIONER CONTROL SYSTEM [MANUAL AIR CONDITIONER]
id0740a2101000
Outline
• The climate control unit performs the defroster control based on the signal sent from the airflow mode selector dial, and sends an operating signal to the air intake actuator.
• The climate control unit sends an A/C signal to the PCM via instrument cluster based on signals sent from the A/C switch, airflow volume control dial, and evaporator temperature sensor.
Block Diagram
Outline of Control System
• Manual air conditioner has defroster control and A/C compressor control.
|
Control name
|
Control part
|
|
• A/C compressor control
• Defroster control
|
Climate control unit
|
A/C Compressor Control
• The climate control unit sends an A/C signal to the instrument cluster based on signals sent from the A/C switch, airflow volume control dial, and evaporator temperature sensor.
A/C signal on/off control
-
• To prevent the evaporator being frozen while the A/C is on (A/C and fan switches are on), the PCM switches the A/C signal on/off (on/off of the magnetic clutch) based on the temperature signal from the evaporator temperature sensor so that the temperature of the air passing through the evaporator is within a certain range.
Recirculate control
-
• When the pressure sensor signal is more than 2.6 MPa {27 kgf/cm2, 377 psi} to the climate control unit, A/C is ON and air intake mode is FRESH. The air intake actuator operates and turns the air intake mode to RECIRCULATE for improve cooling effectiveness.
Defroster control
-
• To improve defrosting when the climate control unit airflow mode dial is turned to DEFROSTER position, the defroster control switches air intake to FRESH mode.
