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Home >> Buick >> 2007 >> Allure CXS >> Repair and Diagnosis >> Accessories & Equipment >> Memory Modules >> Configurable Customer Control System >> Diagnostic Information and Procedures >> Steering Wheel Controls Inoperative (Mute) >> Circuit/System Description

Circuit/System Description

The body control module (BCM) supplies voltage to the MUTE switch through the Ignition 1 voltage circuit and monitors the Cellular telephone voice signal circuit. When the switch is pressed the BCM identifies the selection, then sends a serial data message that is received by the component controlled, activating the feature.