DTC P0724: Brake Switch Circuit - High Input: Description

The TCC brake switch indicates brake pedal status to the PCM. The TCC brake switch indicates that the brake pedal is either applied or released. The normally-closed switch supplies battery voltage to the PCM. Applying the brake pedal opens the TCC brake switch, interrupting voltage to the PCM. When the PCM receives 0 volts at the TCC brake switch input, the PCM turns OFF the Torque Converter Clutch Pulse Width Modulation (TCC PWM) solenoid valve. If the PCM detects a closed TCC brake switch (indicating pedal released) during a number of decelerations, then DTC P0724 sets.