Mazda 6 Training Manual page 352

1 A/C switch
2 Set temperature
3 MODE switch
4 Ambient temperature
5 Cabin temperature
6 Sunlight intensity
A/C Compressor Automatic Control
• The climate control unit determines A/C ON/OFF mode based on the ambient temperature. When A/C is in ON
mode, an ambient temperature computation value is calculated based on the ambient temperature, set
temperature, and temperatures from various sensors. This value is used to determine the temperature of the
air passing through the evaporator. The temperature of this air determines whether the climate control unit
turns the magnetic clutch (A/C signal) off or on. When the ambient temperature is high/low, the climate control
unit lowers/raises the magnetic clutch off temperature. This improves cooling comfort.
.
1 A/C mode ON/OFF decision
2 Ambient temperature
3 A/C ON
4 A/C OFF
5 A/C ON/OFF mode determination when A/C is in
ON mode.
Correction
Defroster correction
• To improve defrost effect when the DEFROSTER switched on, select A/C mode and set the A/C signal ON/
OFF temperature is set at 5.0/4.0° ° ° ° C. However, when in ambient temperature correction, defroster correction
does not take place.
Ambient temperature correction
• When the ambient temperature is below –5° ° ° ° C {23° ° ° ° F}, this correction fies the A/C compressor in OFF mode to
protect the A/C compressor (that is, to prevent A/C compressor fluid compression). If the A/C switch is pressed,
only the indicator will indicate; the A/C compressor will not operate.
Windshield mist prevention correction
• To prevent the air blown from the defroster when the heater is started in winter from clouding the windows, the
blower motor and the A/C signal output are switched off for 6 seconds after the ignition is turned to ON
position. This control only operates if the airflow is in HEAT, HEAT/DEF, or DEFROSTER mode during airflow
volume automatic control.
CONTROL SYSTEM
7 Signals
8 Climate control unit
9 Output
10 A/C relay
11 A/C compressor
12 Operation
6 Varies with an ambient temperature computation
value.
7 Evaporator temperature
8 A/C signal on
9 A/C signal off
U
A6E8540T009
U–33