Steering Wheel Controls

A separate temperature switch and fan switch is mounted on the steering wheel to allow the driver to adjust the HVAC temperature and blower speed. Power to the right steering wheel control is delivered from the DIM, through the steering column fuse holder and inflatable restraint steering wheel module coil on the remote radio control supply voltage circuit. If the driver toggles the temperature switch or the fan switch up or down, then a 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 remote radio control signal circuit. The DIM receives the varied voltage signal, then the information is sent out over the Class 2 serial data circuit, to the IPM. The IPM will adjust the HVAC temperature and blower speed.