DTC P0724: Torque Converter Clutch Brake Switch Closed: Description

The Torque Converter Clutch (TCC) brake switch indicates brake pedal status to PCM. The TCC brake switch indicates that brake pedal is either applied or released. The normally closed switch supplies battery voltage to PCM. Applying brake pedal opens the TCC brake switch, interrupting voltage to PCM. When PCM receives zero volts at TCC brake switch input, PCM turns off the torque converter clutch Pulse Width Modulation (PWM) solenoid.

If PCM detects a closed TCC brake switch (indicating pedal released) during a number of decelerations, DTC will set. DTC P0724 is a Type "C" DTC.