Air Conditioning (A/C) Full Demand Switch

The A/C full demand switch circuit provides a voltage signal to the PCM which indicates the MAX A/C, DEFROST, or FLOOR/DEFROST mode is requested. If the engine is shut down during normal engine operation the PCM restarts it when A/C full demand is selected. The engine will remain running when the A/C full demand switch is selected allowing the A/C compressor to circulate the refrigerant for the passenger compartment.