Combination Meter: Inspection

LIGHT CONTROL RHEOSTAT ASSY
1. Inspect continuity.
  1. Check the continuity between the connector terminals when operating the rheostat volume knob.
  Standard:
  
  Fig 1: Terminal Continuity Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 2: Checking Continuity Between Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check resistance.
  1. Check the resistance between terminals 4 (RV) and 3 (T) when operating the rheostat volume knob. Also, check that the resistance change continuously.
  1. Standard resistance:
  2. Turn the knob to maximum - Approx. 10 kΩ
  3. Turn the knob to minimum - Approx. 0 kΩ
  Fig 3: Rheostat Volume Knob Resistance Graph
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002