LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2002 >> ES 300 >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panel >> Component Tests >> Light Control Rheostat Assembly
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Light Control Rheostat Assembly

  1. Check the continuity between the connector terminals when operating the rheostat volume knob. For connector view, see CONNECTOR IDENTIFICATION . See RHEOSTAT VOLUME KNOB STANDARD CONTINUITY  table.
    RHEOSTAT VOLUME KNOB STANDARD CONTINUITY

    Switch Terminal No. (Symbol) Continuity
    Turn The Knob To Maximum 1 (TC) To 3 (T) Continuity
    Other Condition Of The Above 1 (TC) To 3 (T) No Continuity
  2. Check the resistance between terminals No. 4 (RV) and 3 (T) when operating the rheostat volume knob. See Fig 1. Also, check that the resistance changes continuously. Standard resistance: turn the knob to maximum - approximately 10 k Ohms, turn the knob to minimum - approximately 0 Ohms.
Fig 1: Checking Rheostat Volume Knob Resistance
G00178300Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002