HEATED STEERING WHEEL SYSTEM FAIL-SAFE CHART


  1. MALFUNCTION DETECTION


    1. Operation when malfunction is detected

      Content Operation
      When thermistor malfunction is detected Heater off
      When overheating (175°C (347°F)) of controller is detected Heater off
      When load short current (50 A or more) is detected Heater off
      When undervoltage (4.5 V) is detected Heater off
      OFF timer (30 min.) After preset time of timer passes, heater off
      Reverse voltage protection Protection circuit operates

    2. Malfunction detection conditions


      1. When an open or short in the steering wheel heater unit thermistor continues for 2 seconds or more.

      2. When the steering heater switch (refreshing seat switch) is pressed continuously for 10 seconds or more.