HEATED STEERING WHEEL SYSTEM TERMINALS OF ECU


  1. CHECK HEATED STEERING WHEEL CONTROLLER

    Tech Tips

    Inspect the connectors from the back side while the connectors are connected.

    A01ERU6E01

    1. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A-4 (CCW) - A-3 (CCX) W - GR IG power supply Engine switch on (IG) 11 to 14 V
      A-1 (CCU) - A-3 (CCX) BR - GR Heated steering wheel switch LED output signal Engine switch on (IG), Steering heater switch on Below 3 V
      A-2 (CCV) - A-3 (CCX) G - GR Heated steering wheel switch input signal Engine switch on (IG), Steering heater switch pressed and held 10 to 14 V
      B-3 (TH1) - A-3 (CCX) G - GR Thermistor input signal Engine switch on (IG), Steering heater switch on at 0 to 40°C (32 to 104°F) 1.5 to 4.5 V
      B-1 (TH2) - A-3 (CCX) G - GR Thermistor ground Engine switch on (IG), Steering heater switch on Below 1 V
      B-4 (SH1) - A-3 (CCX) R - GR Heater ground Engine switch on (IG), Steering heater switch on Below 1 V
      B-2 (SH2) - A-3 (CCX) B - GR Heater output signal Engine switch on (IG), Steering heater switch on 10 to 14 V*
      A-3 (CCX) - Body ground GR - Body ground Ground Always Below 1 Ω

      Tech Tips

      *: The current to the heater turns on/off depending on the temperature of the thermistor. As a result, it may take several minutes before a voltage value is output.