A/C System

WARNING: This page is about a different car, the 2002 Dodge Intrepid, 2002 Chrysler Intrepid, 2002 Chrysler Concorde, and 2002 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: When connecting the service equipment coupling to the line fitting, verify that the valve of the coupling is fully closed. This will reduce the amount of effort required to make the connection.

NOTE: The word MANUAL should appear in the ATC display, confirming that the system is set manually.

The air conditioning system is designed to remove heat and humidity from the air entering the passenger compartment. The evaporator, located in the HVAC housing, is cooled to temperatures near the freezing point. As warm damp air passes over the fins in the evaporator, moisture in the air condenses to water, dehumidifying the air. High humidity reduces the evaporators ability to cool the air. During periods of high heat and humidity, an air conditioning system will be less effective. With the HVAC control set to RECIRC, only air from the passenger compartment passes through the evaporator. As the passenger compartment air dehumidifies, A/C performance levels rise.

Air temperature in test room and in vehicle must be 70°F (21°C) minimum for this test.

Connect a tachometer and manifold gauge set or an A/C charging/recycling station.
Set controls to A/C On, panel recirculation, temperature to full cold and high blower.
Start engine and hold at 1000 RPM with A/C clutch engaged.
Engine should be warmed up with doors and windows closed.
Insert a thermometer in the left center A/C outlet and operate the engine for five minutes. The A/C clutch may cycle depending on ambient conditions.
With the A/C clutch engaged, compare the discharge air temperature to the A/C performance temperature & pressure table. See Fig 1 .

Fig 1: A/C Performance Temperature & Pressure Table

Courtesy of CHRYSLER CORP.