Mazda 6 Training Manual page 337

A/C Compressor Control
• The center panel sends an A/C signal to the PCM via the refrigerant pressure switch based on signals sent
from the A/C switch, fan switch and evaporator temperature sensor.
• The PCM controls the A/C relay and IAC valve based on the input signal from the center panel.
.
1 Evaporator temperature sensor
2 A/C signal
3 Center panel
4 Output
A/C signal on/off control
• The center panel turns the A/C signal (magnetic clutch) on and off based on the temperature of the air passing
through the evaporator when the A/C and fan switches are on. This keeps the evaporator surface temperature
within the specified range, preventing the evaporator from freezing while the fan switch and A/C switch are
turned on.
.
1 A/C signal on/off decision
2 Evaporator temperature sensor
End Of Sie
U–18
CONTROL SYSTEM
5 A/C relay
6 Magnetic clutch
7 IAC valve
3 A/C signal
A6E8540T049
A6E8540T047