Compressor HVAC: Description and Operation

The A/C system uses a Denso 10S20, five double-acting piston, reciprocating swash plate-type A/C compressor (1) on all models. This A/C compressor has a fixed displacement of 200 cubic centimeters (12.2 cubic inches) and has both the suction and discharge ports (2) located at the rear of the compressor on the cylinder head (3).

A label identifying the use of R-134a refrigerant is located on the A/C compressor.

The A/C compressor is driven by the engine through an electric clutch, drive pulley and belt arrangement. The A/C compressor is lubricated by refrigerant oil that is circulated throughout the refrigerant system with the refrigerant.

The A/C compressor draws in low-pressure refrigerant vapor from the A/C evaporator through its suction port. It then compresses the refrigerant into a high-pressure, high-temperature refrigerant vapor, which is then pumped to the A/C condenser through the compressor discharge port.

The A/C compressor cannot be repaired. If faulty or damaged, the A/C compressor assembly must be replaced. The compressor clutch, pulley and bearing assembly, and clutch field coil are available for service.