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Home >> Pontiac >> 2004 >> Sunfire Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 91 (Automatic Transaxle - 4T40-E/4T45-E Diagnosis (DTC P0218 To P0748 - 2.2L)) >> Diagnostic Information and Procedures >> DTC P0724 (3.4L) >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2004 Pontiac Grand Am and 2004 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.

The brake switch indicates brake pedal status to the powertrain control module (PCM). The normally-closed brake switch supplies ignition voltage 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 brake switch input, the PCM de-energizes the torque converter clutch (TCC) solenoid valve.

When the PCM detects a closed brake switch, stuck OFF, during decelerations, then DTC P0724 sets. DTC P0724 is a type C DTC.

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