Description And Operation: Operation

Steering Wheel Switch 

• Once the switch is pressed, the switch will illuminate and an International Standards Organization (ISO) symbol appears in to top corner of the U-Connect Touch™ screen module, indicating that the heating element in the steering wheel is operating.
• Pressing the switch while the heated steering wheel is on, will turn the heating steering wheel off.
• When the heated steering wheel switch is pressed and a fault is present in the heated steering wheel system, the switch will illuminate for two seconds and then immediately turn off.
• The heated steering wheel switch located in the U-Connect Touch™ screen module cannot be adjusted or repaired. If a heated steering wheel switch or indicator lamp is inoperative or damaged, the entire U-Connect Touch™ screen module must be replaced.

Heated Seat Module (HSM) 

• The HSM provides power to the heated steering wheel heating elements in the steering wheel. This output passes through the Steering Column Control Module (SCCM).
• The SCCM is the interface between the heated steering wheel and the vehicle.
• Body Control Module (BCM) gates messages between the CAN C bus and the CAN IHS bus. Additionally the BCM provides vehicle information to the HSM.
• A thermistor sensor feedback from the heated steering wheel element to the HSM is used to regulate the heat output to prevent the heated steering wheel temperature from rising above the set points.
• The heated steering wheel system will only operate when the vehicle engine is running approximately (RPM > 400).
• The HSM will automatically transition the output from On to Off after a period of 80 minutes has elapsed.

Steering Wheel Thermistor Feedback 

• The steering wheel switch receives the steering wheel thermistor data from the heated steering wheel.
• The steering wheel switch transmits the steering wheel thermistor data signal via a LIN bus to the BCM.
• The BCM transmits the steering wheel thermistor data signal to the HSM on the CAN IHS bus.
• When the HSM heated steering wheel output is ON, if the thermistor feedback exceeds 122 degrees Fahrenheit the HSM will immediately turn the heated steering wheel output off.

Auto On Feature 

• The "Auto On" feature is a customer configurable feature that, when enabled, will activate the driver heated seat and heated steering wheel on engine start based on ambient temperature.
• If Auto On feature is enabled, and the ambient temperature is at or below 4° C (40° F) the HSM will activate the driver heated seat and heated steering wheel feature at the high level after engine start.
• This feature also works with Remote Start.

The steering wheel heating element is not serviced separately from the steering wheel and if inoperative or damaged, the entire steering wheel assembly must be replaced. Refer to WHEEL, STEERING, REMOVAL AND INSTALLATION .