A/C Clutch
When A/C is turned on while engine is at idle, IAC actuator will increase engine idle speed. To prevent A/C compressor clutch from switching on before idle speed has increased, the ECM briefly opens the A/C relay circuit.
When A/C is turned on while engine is at idle, IAC actuator will increase engine idle speed. To prevent A/C compressor clutch from switching on before idle speed has increased, the ECM briefly opens the A/C relay circuit.