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Light Control Rheostat: Inspection

WARNING: This page is about a different car, the 2006 Lexus IS 350 and 2006 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT LIGHT CONTROL RHEOSTAT 
    1. Measure the resistance according to the value(s) in the table below.

    Standard resistance 

    STANDARD RESISTANCE SPECIFICATION

    Tester Connection Condition Specified Condition
    E (J15-1) - RV (J15-4) Light control rheostat position is MIN. Below 1 Ω
    E (J15-1) - RV (J15-4) Light control rheostat position is between MIN. and MAX. 8 to 12 kΩ
    E (J15-1) - RV (J15-4) ODO/TRIP switch is OFF 10 kΩ or higher
    ODO/TRIP switch is ON Below 1 Ω
    T (J15-2) - TC (J15-3) Rheostat knob is in the MIN. position Below 1 Ω
    T (J15-2) - TC (J15-3) Rheostat knob is in the MAX. position 10 kΩ or higher
    Fig 1: Identifying Light Control Rheostat
    G04050064Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

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

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