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Home >> GMC >> 1998 >> Yukon RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 70 (Automatic Transmission Diagnosis - 4L80-E (Gasoline)) >> Diagnostic Tests >> DTC P0719: Brake Switch Circuit Low Input >> Circuit Description

Circuit Description

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Torque Converter Clutch (TCC) brake switch is used to indicate brake pedal status to VCM. Normally closed brake switch supplies voltage signal to VCM. VCM de-energizes TCC solenoid when brake pedal is applied. DTC P0719 will set if VCM detects an open (stuck on) brake switch during acceleration.

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