A/C Idle-Up Signal
A/C idle-up signal is sent from A/C compressor control module to PCM. PCM uses this signal to detect when A/C is operating and sends a signal to Idle Air Control (IAC) valve to increase idle speed.
A/C idle-up signal is sent from A/C compressor control module to PCM. PCM uses this signal to detect when A/C is operating and sends a signal to Idle Air Control (IAC) valve to increase idle speed.