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DTC P0719: Brake Switch Circuit - Low Input: Description

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

The 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 a battery 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 0 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 DTC P0719 sets.

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