Compressor Clutch Inoperative

The air-conditioning compressor clutch electrical circuit is controlled by the engine controller computer located in the engine compartment outboard of the battery.

If the compressor clutch does not engage, verify refrigerant charge.

If the compressor clutch still does not engage, check for battery voltage at the low pressure or differential pressure cut-off switch located on the expansion valve. If voltage is not detected, refer to:
1. Diagrams/Electrical.
2. Powertrain Management/Computer and Controls/Testing and Inspection/Procedures.
3. Compressor Clutch Diagnosis.
3. Check for battery voltage at the Thermal Limiter Switch located on the compressor.

If voltage is detected at the cut-off switch and/or thermal limiter switch, connect switch and check for battery voltage between the compressor clutch connector terminals.

If voltage is detected, perform A/C Clutch Coil Tests.