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Home >> Pontiac >> 2001 >> Aztek Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1711 (Cruise Control System) >> Diagnostic Information and Procedures >> DTC P0571-P0573 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The brake applied signal circuit is a direct hardwire input from the body control module (BCM) to the engine control module (ECM) and transmission control module (TCM). The ECM monitors the brake applied signal circuit to detect when the brake pedal has been applied. The BCM monitors the brake switch signal to determine when the brake pedal is applied. When the brake pedal is applied, the BCM sends a serial data message to the ECM indicating that the brake pedal has been applied. The BCM sends a voltage signal on the brake applied signal circuit to the ECM and TCM.

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