HEATED STEERING WHEEL SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    Steering Wheel Assembly Heater Element Warms the steering wheel.
    Control Thermostat Shuts off current to the HI heater element circuit when the steering wheel surface temperature exceeds a threshold.
    Overheating Prevention Thermostat Shuts off current to the LO and HI heater element circuits when the steering wheel surface temperature exceeds a threshold.
    Steering Heater Switch Steering Heater Switch Used to switch the heated steering wheel system on and off.
    Indicator Light Illuminates when the heated steering wheel system is on.

  2. FUNCTION


    1. When the steering heater switch is turned on while the ignition switch is ON, the indicator light provided on the steering heater switch illuminates and current flows to the heater elements inside the steering wheel, warming up the surface of the steering wheel.

    2. The heated steering wheel system uses the 2 thermostats provided in the steering wheel to maintain the surface temperature of the steering wheel at approximately 37°C (99°F).

    3. When the heater portions meet or exceed approximately 42°C (108°F), the control thermostat shuts off current to the HI circuit. Furthermore, when the heater portions drop to approximately 33°C (91°F) or below, the control thermostat restores current to the HI circuit to adjust the temperature. Normally, current is constantly supplied to the LO circuit.

    4. If the heater portions meet or exceed approximately 50°C (122°F), the overheating prevention thermostat shuts off current to the HI and LO circuits in order to prevent overheating.