Light Control Rheostat: Inspection

INSPECT LIGHT CONTROL RHEOSTAT

Remove the light control rheostat.

Fig 1: Identifying ODO/TRIP Switch Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value (s) in the table below.

Standard resistance

RESISTANCE REFERENCE CHART

Tester Connection	Condition	Specified Condition
R6-1 (E) - R6-7 (RV)	Rheostat knob is in the MIN. position.	Approx. 0 Ω
R6-1 (E) - R6-7 (RV)	Rheostat knob is between the MIN. and MAX. position.	8 to 12 kΩ
R6-1 (E) - R6-4 (RSET)	ODO/TRIP switch is not pressed.	10 kΩ or higher
R6-1 (E) - R6-4 (RSET)	ODO/TRIP switch is pressed.	Below 1 Ω
R6-6 (TC) - R6-1 (E)	Always	8 to 12 kΩ
R6-6 (TC) - R6-5 (T)	Rheostat knob is in the MAX. position.	Approx. 0 Ω
R6-6 (TC) - R6-5 (T)	Rheostat knob is in the MIN. position.	10 kΩ or higher

Fig 2: Light Control Rheostat Resistance Graph

HINT:

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