Steering Wheel Controls Block Diagram

Fig 1: Steering Wheel Controls Block Diagram

Courtesy of GENERAL MOTORS COMPANY

The steering wheel control switches duplicate the function of the primary controls of the associated component. The Steering Wheel Controls are divided into a right-hand set and left-hand set. The right-hand switch is connected to the IPC LIN serial data and provides hardwired serial data input from the left-hand switches. The IPC identifies the switch selected and sends a serial data message to the component controlled by the switch, activating the feature.

This section is intended to diagnose the circuits between the IPC and the steering wheel control switches. If the primary control for the device is inoperative, refer to the appropriate section for the component the steering wheel control switch is used for.