Air Conditioning: Overview

The A/C system transfers heat from the cabin to the outside atmosphere to provide the heater assembly with dehumidified cool air.

The A/C system is a sealed closed loop system, filled with a charge weight of R-134a refrigerant as the heat transfer medium. The refrigerant charge weight for both i6 and TD4 vehicles is 730 g. Oil is added to the refrigerant to lubricate the internal components of the A/C compressor.

Although different units, the A/C compressors fitted to both the i6 petrol engine and the TD4 diesel engine are both variable displacement units. The displacement (flow of refrigerant) is controlled to match the thermal load of the evaporator.

Operation of the A/C system is controlled by the Automatic Temperature Control (ATC) module. See CONTROL COMPONENTS .