Circuit/System Description

The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control ON/OFF, Set/Coast, Resume/Accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The BCM sends a serial data message to the engine control module (ECM) indicating the status of the cruise control switches.