Steering Wheel Temperature Control Switch

A separate temperature switch is mounted on the steering wheel to allow the driver to adjust the temperature. Power to the left steering wheel controls is delivered from the Dash Integration Module (DIM), through the steering column fuse holder, and inflatable restraint steering wheel module coil on the remote radio control head supply voltage and steering wheel controls signal circuit. When the driver toggles the temperature switch up or down, the voltage is sent through a series of resistors. That varied voltage is sent back through the inflatable restraint steering wheel module coil to the DIM through the steering wheel controls signal circuit. Once the DIM receives the varied voltage signal, the information is sent out over the class 2 serial data to the HVAC control module where the blower speed is adjusted.