AIR CONDITIONER CONTROL
ATC-31
C
D
E
F
G
H
I
K
L
M
A
B
ATC
MAGNET CLUTCH CONTROL
When A/C switch, AUTO.ECON switch or DEF switch is pressed, display and A/C auto amp. transmits com-
pressor ON signal to BCM.
BCM sends compressor ON signal to ECM, via CAN communication.
ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant-pressure sen-
sor signal, throttle angle, etc.). If it judges compressor can be turned ON, it sends compressor ON signal to
IPDM E/R, via CAN communication.
Upon receipt of compressor ON signal from ECM, IPDM E/R turns A/C relay ON to operate compressor.
When sending compressor ON signal to IPDM E/R via CAN communication, ECM simultaneously sends com-
pressor feedback signal to meter control unit via CAN communication.
Meter control unit sends compressor feedback signal to display and A/C auto amp., then, uses input compres-
sor feedback signal to control air inlet.
SELF-DIAGNOSIS SYSTEM
The self-diagnosis system is built into the display and A/C auto amp. to quickly locate the cause of malfunc-
tions.
RJIA1628E