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Home >> Buick >> 2016 >> Cascada Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 20 (Cruise Control System) >> Diagnostic Information and Procedures >> DTC P0703: Brake Switch Signal Message Counter Incorrect >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2016 Chevrolet Malibu Limited. However, it is still accessible from the selected car via links, so may be relevant.

The body control module (BCM) monitors the brake pedal position sensor. When the brake pedal is applied, the BCM detects a predetermined voltage signal. The BCM sends a serial data message to the engine control module (ECM) indicating the status of the stop lamps.

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