A/C Signal
This signal is sent from A/C amplifier to ECM terminal A2. ECM uses this signal to detect when A/C is operating and sends a signal to Idle Air Control (IAC) valve or Idle Speed Control (ISC) actuator to increase idle speed.
This signal is sent from A/C amplifier to ECM terminal A2. ECM uses this signal to detect when A/C is operating and sends a signal to Idle Air Control (IAC) valve or Idle Speed Control (ISC) actuator to increase idle speed.