A/C Clutch

When A/C switch is turned while engine is at idle, the ISC servo is commanded to increase idle speed. To prevent A/C compressor clutch switching on before idle speed has increased, the ECU briefly opens the A/C relay circuit.

On automatic transmission models, during acceleration when throttle valve opening is 65 degrees or more, A/C power relay circuit is cut-off for approximately 5 seconds to aid acceleration.