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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 220 (Automatic Transaxle Diagnosis - 4T65-E) >> Diagnostic Tests >> DTC P0719: TCC Brake Switch Circuit Low Input (Switch Stuck On) >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

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 zero 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 an open brake switch (indicating pedal applied) during a number of accelerations, then DTC P0719 sets. DTC P0719 is a type "C" DTC.

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