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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 23 (Automatic Transaxle (DTC P0218 To DTC P0742)) >> Diagnosis >> DTC P0724 (3.8L) >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The torque converter clutch (TCC) brake switch indicates brake pedal status to the transmission control module (TCM). The TCC brake switch indicates that the brake pedal is either applied or released. The normally-closed switch supplies battery voltage to the TCM. Applying the brake pedal opens the TCC brake switch, interrupting voltage to the TCM. When the TCM receives 0 volts at the TCC brake switch input, the TCM turns OFF the torque converter clutch pulse width modulation (TCC PWM) solenoid valve.

If the TCM detects a closed TCC brake switch, indicating pedal released, during a number of decelerations, then DTC P0724 sets. DTC P0724 is a type C DTC.

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