Controlling The Functions Using The Steering Wheel Buttons

Fig 1: Identifying Functions Using Steering Wheel Buttons

Courtesy of VOLVO CARS CORPORATION

The steering wheel buttons connected to the steering wheel module (SWM) (3/130) can be used to control: 

• volume control and CD track / radio selection
• menu selection for traffic information
• volume control during a hands free call and menu selection for phone module (PHM) (16/60) and Bluetooth phone module (BPM) (16/147).

The signals from the steering wheel buttons are transmitted to the steering wheel module (SWM) with LIN communication. The steering wheel module (SWM) transmits the signals on to the Infotainment Control Module (ICM) (3/281) using LIN communication. The infotainment control module (ICM) in turn transmits the signals on to the affected control module on the MOST network.