Combination Meter: Inspection

LIGHT CONTROL RHEOSTAT ASSY
1. Check the continuity of light control rheostat when light control rheostat operation as shown in chart below.
  Standard:
  
  Fig 1: Identifying Light Control Rheostat Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check resistance.
  1. 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.
    Standard Resistance:
    
    Turn the knob to maximum: Approx. 10 kΩ
    
    Turn the knob to minimum: Approx. 0 kΩ
    
    Fig 2: Identifying Light Control Rheostat Connector Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 3: Rheostat Resistance Graph
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002