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Light Control Rheostat: Inspection: Inspection

  1. INSPECT LIGHT CONTROL RHEOSTAT 
    1. Measure the voltage according to the value(s) in the table below.
      Fig 1: Identifying Light Control Rheostat
      GTY149921Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage

      Tester Connection Condition Specified condition
      1 (T) - Body ground Ignition switch ON, Taillight switch OFF → ON Below 1 V → 10 to 14 V
      2 (IG) - Body ground Ignition switch OFF → ON Below 1 V → 10 to 14 V
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified condition
      5 (E) - Body ground Always Below 1 Ω
    3. Check the resistance between terminal 4 (RV) and terminal 3 (T) when operating the light control rheostat volume knob. Also, check that the resistance changes continuously.
      Fig 2: Light Control Rheostat Resistance Graph
      GTY155943Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance

      Turn the knob to maximum 

      Approx. 10 kΩ

      Turn the knob to minimum 

      Approx. 0 kΩ

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