Brake Switch Feedback

The ABS/Torque Converter Clutch (TCC) brake switch is used to indicate the status of the brake pedal, applied or released, to the PCM. The normally-closed TCC brake switch supplies an ignition voltage input to the PCM. Applying the brake pedal opens the switch, interrupting voltage to the PCM. Releasing the brake pedal resumes voltage to the PCM. When the PCM senses zero volts at the TCC brake switch input, the PCM de-energizes the TCC solenoid valve. If the PCM detects an open TCC brake switch, stuck ON, during accelerations, then a related DTC sets.