Operation

OPERATION

The A/C compressor clutch components provide the means to engage and disengage the A/C compressor from the engine accessory drive belt. When the electromagnetic A/C clutch field coil is energized, it magnetically draws the clutch plate into contact with the clutch pulley and drives the compressor shaft. When the coil is not energized, the pulley freewheels on the clutch hub bearing, which is part of the pulley assembly.

The A/C compressor clutch engagement is controlled by the following components:

- A/C-heater control in the passenger compartment
- A/C pressure transducer on the A/C discharge line
- Powertrain control module (PCM) in the engine compartment
- A/C clutch relay in the power distribution center (PDC)

The A/C compressor clutch components cannot be repaired and must be replaced if found inoperative or damaged.