Compressor Clutch Relay: Description and Operation

A/C Control Circuit:

Purpose:
The A/C relay is energized by the PCM based on information input by the A/C request signal.

Operation:
When the PCM detects that A/C has been requested, the PCM supplies a ground signal to the coil inside the A/C relay. The switch portion of the relay is now operated, energizing the A/C compressor clutch.

Location:
The A/C control relay is located in the underhood electrical center.