Air Conditioning (A/C) Clutch

NOTE: This applies to OEM, factory installed air conditioning.

DESCRIPTION
The electromagnetic A/C clutch is energized when the A/C cycling switch closes. The switch is located on the suction accumulator/drier. The closing of the switch completes the circuit to the A/C clutch and draws it into engagement with the compressor drive shaft. When engaged, the A/C clutch is an input to the powertrain control module to adjust electronic pressure control (EPC) pressure for the load on the engine. Also used to adjust torque converter clutch (TCC) modulation when the A/C clutch is engaged.

SYMPTOMS
- Failed ON-EPC pressure slightly low with A/C OFF.
- Failed OFF-EPC pressure slightly high with A/C ON.
- If erratic A/C operation occurs, the customer may feel improper TCC apply and release.

DTC's
P1460