Steering Wheel Controls

Some audio functions are available using the steering wheel controls. The steering wheel controls consist of multiple momentary contact switches that connect a series of resistors. When a switch is pressed, a voltage drop occurs in the resistor network, which produces a specific voltage value unique to the switch selected. These specific voltage values allow the CD changer or body control module (BCM) to identify which switch has been pressed. Class 2 messages are then sent from the CD changer or BCM to the appropriate component to perform the desired function.