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Light Control Rheostat: Inspection

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT LIGHT CONTROL RHEOSTAT 
    1. Remove the light control rheostat with connector still connected.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 1: Measuring Light Control Rheostat
      G04115412Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance 

      LIGHT CONTROL RHEOSTAT

      Tester Connection Condition Specified Condition
      R6-1 (E) - R6-7 (RV) Light control rheostat position is MIN. Below 1 Ω
      R6-1 (E) - R6-7 (RV) Light control rheostat position is between MIN. and MAX. 8 to 12 kΩ
      R6-1 (E) - R6-7 (RV) ODO/TRIP switch is OFF -> ON 10 kΩ or higher -> Below 1 Ω
      Fig 2: Light Control Rheostat Resistance Graph
      G04115413Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      If the value is not as specified, replace the light control rheostat.

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