A/C COMPRESSOR CONTROL OPERATION

id074000103200

A/C Compressor Automatic Control

• The front climate control unit switches modes between the A/C mode and ECO mode based on the input signal from evaporator temperature sensor and ambient temperature sensor.
• In A/C mode, the A/C signal (magnetic clutch) is turned on/off according to the temperature of the air passing through the evaporator. The temperature of the air passing through the evaporator at which the A/C signal turns off is determined by the ambient temperature calculation value that is calculated based on the ambient temperature, target temperature. By setting the A/C signal off temperature low when strong cooling performance is needed, such as when the ambient temperature is high, and setting it high in other conditions, cooling comfort and fuel economy during A/C operation are improved.

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Correction

Defroster correction
• When the defroster switch is turned on or the airflow mode is switched to HEAT/DEF mode, the system is fixed in A/C mode to improve defrosting.
MAX COLD correction
• When the set temperature is at 32.0 or 15.0, the A/C operation mode set as shown in the table.

TEMPERATURE CONTROL DIAL | OPERATION MODE
--- | ---
DRIVER SIDE | PASSENGER SIDE
15.0 | 15.0 | A/C MODE
15.0 | EXCEPT 15.0, 32.0 | A/C MODE
EXCEPT 15.0, 32.0 | 15.0 | A/C MODE
15.0 | 32.0 | A/C MODE
32.0 | 15.0 | A/C MODE
32.0 | EXCEPT 15.0, 32.0 | ECO MODE
EXCEPT 15.0, 32.0 | 32.0 | ECO MODE
32.0 | 32.0 | OFF

A/C Compressor Manual Control

• A/C ON (ECO mode) or OFF mode is selected by operating the A/C switch.

A/C mode | Operation condition
--- | ---
A/C ON mode | ECO mode | Fixed in A/C ON mode.
A/C OFF mode (No display) | Fixed in A/C OFF mode.

A/C signal ON/OFF determination in A/C ON (ECO mode)

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