Air Conditioning (A/C) Clutch Relay

Fig 30 Power Distribution Center (PDC):

The PCM operates the air conditioning clutch relay ground circuit. The radiator fan control module supplies battery power to the solenoid side of the relay.

The air conditioning clutch relay will not energize unless the radiator fan control module energizes. The radiator control module energizes when the air conditioning or defrost switch is put in the ON position and the low pressure switch, combination valve, and high pressure switch close.

With the engine operating, the PCM cycles the air conditioning clutch on and off when the A/C switch closes with the blower motor switch in the On position. When the PCM senses low idle speeds or wide open-throttle through the throttle position sensor, it de-energizes the A/C clutch relay. The relay contacts open, preventing air conditioning clutch engagement.

The air conditioning clutch relay is located in the Power Distribution Center (PDC). The PDC is located in the engine compartment next to the battery (Fig. 30). A label affixed to the underside of the PDC cover identifies the relays and fuses in the PDC.