Combination Meter: Inspection

LIGHT CONTROL RHEOSTAT

Inspect continuity.

Check the continuity between the light control rheostat connector terminals when operating the rheostat volume knob.

Fig 1: Identifying Light Control Rheostat Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard:

LIGHT CONTROL RHEOSTAT - CONTINUITY TABLE

Switch	Tester connection (Symbol)	Condition
Turn the knob to maximum	1 (TC) - 4 (T)	Below 1 Ω
Conditions other than the above	1 (TC) - 4 (T)	10 kΩ or higher

Check the resistance between terminal 3 (RV) and terminal 4 (T) when operating the light control rheostat volume knob. Also, check that the resistance changes continuously.
Standard:

Turn the knob to maximum: Approx. 10 kΩ

Turn the knob to minimum: Approx. 0 kΩ

Fig 2: Rheostat Volume Knob Resistance Graph
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002