Control Module HVAC: Description and Operation

CLIMATE CONTROL UNIT DESCRIPTION
- The climate control unit controls air mixture, air intake, air flow mode and fan speed.
- The following heater and A/C related functions are controlled by the PCM:
- A/C relay (A/C relay controls A/C compressor magnetic clutch.)
- Condenser fan
- Idle-up control (compensates for A/C compressor and blower motor load)