Steering Column Control Module With Steering Wheel Switch

For heating the steering wheel, the SCCM provides power and return to the steering wheel heating element using hardwired signals. The steering wheel switch monitors the heated steering wheel temperature through hardwired circuits connected to a thermistor. The thermistor is what detects the temperature of the heated steering wheel. The steering wheel switch, via the SCCM, reports the heated steering wheel temperature on a signal sent over the Local Interface Network (LIN) bus. The steering wheel switch is also used to detect and report faults, via the SCCM, in the thermistor.

Inputs

• Heated steering wheel command signal from the CSWM
• Internal heated steering wheel return signal from the heated steering wheel
• Internal steering wheel temperature sense signal from the steering wheel switch to the heated steering wheel

Outputs

• Heated steering wheel return feed to the CSWM
• Internal output for the steering wheel heater command to the heated steering wheel
• Internal heated steering wheel temperature return signal to the steering wheel switch
• Steering wheel temperature sensor and steering wheel temperature from the steering wheel switch to the BCM