Circuit Operation
- As for the stoplight switch, when the brake pedal is depressed, the stoplight switch ON signal is transmitted from the ETACS-ECU to the ECM via CAN bus line.
- As for the brake switch, when the brake pedal is depressed, battery positive voltage is supplied to the stoplight switch (terminal number 3), and when the brake pedal is not depressed, the voltage of ECM (terminal number 108) will indicate 0 volt.