A/C Select Signal
When the air conditioning switch is placed in the "ON" position, an input signal is sent to the ECU informing it that the A/C has been selected. The ECU uses this information to determine correct engine idle speed.
When the air conditioning switch is placed in the "ON" position, an input signal is sent to the ECU informing it that the A/C has been selected. The ECU uses this information to determine correct engine idle speed.