The low side temperature sensor is located in the evaporator hose assembly. The sensor is positioned between the evaporator and expansion tube. The Dash Integration Module (DIM) monitors the sensor to determine low side pressure based on the pressure to temperature relationships of R-134a and prevents evaporator core freeze in mild temperatures.

The A/C temperature sensors are used to monitor the discharge temperature of the air conditioning system. There are two sensors which monitor the driver and passenger air conditioning temperature. The IPM monitors these sensors and adjusts the discharge temperatures accordingly. These sensors are located under the upper instrument panel pad in the A/C ducts.

The heater temperature sensors are used to monitor the discharge temperature of the air flowing out of the heater ducts. There are two sensors which monitor the driver and passenger the heater discharge temperatures. The IPM monitors these sensors and adjusts the discharge temperatures accordingly. These sensors are located in the heater duct.

The A/C compressor control relay cycles the compressor on and off by energizing/de-energizing the compressor clutch coil. When the ignition is on, 12 volts is applied to the relay common contact and one coil terminal. The second coil terminal is grounded by the PCM when the driver selects A/C or defrost mode, and all other requirements are met. When the relay is energized current passes through the relay contacts which energizes the compressor clutch coil.