Air Conditioning Clutch

Description: An electro-magnetic clutch is energized when the clutch cycling pressure switch closes. The switch is located on the suction accumulator-drier. The closing of the switch completes the circuit to the clutch and draws it into engagement with the compressor drive shaft.

Transmission function: Adjust TV pressure when A/C compressor clutch is engaged to compensate for the additional load on the engine.

Symptoms: Failed on - TV pressure slightly low with A/C off Failed off - TV pressure slightly high with A/C on

Test codes: 67