Compressor Controls Circuit

The operation of the A/C compressor clutch is controlled by the Powertrain Control Module (PCM). The PCM receives an a/c request signal from the heater a/c control assembly. Power for the a/c compressor clutch relay coil is supplied by the ERLS fuse. The switched side of the a/c compressor clutch relay is supplied through the A/C fuse. When the PCM receives an a/c request message from the IPC, the PCM grounds circuit 459 allowing the a/c compressor clutch relay to engage. Ground for the a/c compressor clutch is supplied through circuit 150.