Control System Description Manual A/C (Type 2)

MANUAL AIR CONDITIONER SYSTEM


Control System Description


CONTROL OPERATION
Front air control











TEMPERATURE CONTROL DIAL (TEMPERATURE CONTROL)
Increases or decreases the set temperature.





RECIRCULATION ( ) SWITCH
- When REC switch is ON, REC switch indicator turns ON, and air inlet is set to REC.
- When REC switch is turned OFF, or when compressor is turned from ON to OFF, REC switch is automatically turned OFF. REC mode can be re-entered by pressing REC switch again.
- REC switch is not operated when DEF switch is turned ON, or at the D/F or FOOT position.

REAR WINDOW DEFOGGER SWITCH (IF EQUIPPED)
When switch is ON, rear window is defogged.

OFF SWITCH (BLOWER SPEED SET TO 0)
The compressor and blower are OFF.

A/C SWITCH (IF EQUIPPED)
The compressor is ON or OFF.
(Pressing the A/C switch will turn off the A/C switch and compressor.)

MODE DIAL
Controls the air discharge outlets.

FRONT BLOWER CONTROL DIAL
Manually controls the four blower speeds.

MAGNET CLUTCH CONTROL





When the A/C switch is pressed, or the mode dial is turned to the DEF or D/F position, the front air control outputs a compressor ON signal to BCM.
The BCM then sends a compressor ON signal to ECM, via CAN communication line.
ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant pressure sensor signal, throttle angle sensor, etc.). If it judges compressor can be turned ON, it sends compressor ON signal to IPDM E/R, via CAN communication line.
Upon receipt of compressor ON signal from ECM, IPDM E/R turns air conditioner relay ON to operate compressor.