Self Test-Clutch Control

Self-Test Clutch Control Compressor Clutch Circuit Operation of the A/C compressor clutch is dependent on the ambient temperature and signals from the engine computer. The engine computer will interrupt A/C compressor operation when certain conditions exist. The A/C compressor clutch can be shut off (or kept off) for several seconds at engine start-up, at high engine speeds, during acceleration, when the engine coolant temperature exceeds a predetermined temperature and during low engine idle conditions. refer to the following diagnostic procedures and, if necessary, the powertrain Control/Emissions Diagnostic Manual to correct an inoperative compressor clutch condition. The ambient temperature must also be above approximately 10° C (50°F) for the A/C compressor to operate.