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Light Control Rheostat: Inspection

INSPECT LIGHT CONTROL RHEOSTAT (w/o Headlight Cleaner System)

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

Standard resistance

STANDARD RESISTANCE REFERENCE CHART

Tester Connection	Switch Condition	Specified Condition
3 (UP) - 5 (E)	UP ON (Pushed)	Below 200 Ω
3 (UP) - 5 (E)	UP OFF (Not pushed)	1MΩ or higher
7 (DOWN) - 5 (E)	DOWN ON (Pushed)	Below 200 Ω
7 (DOWN) - 5 (E)	DOWN OFF (Not pushed)	1MΩ or higher

If the result is not as specified, replace the rheostat.

Inspect the switch illumination.
1. Connect the battery positive (+) lead to terminal 8 (ILL+) and the negative (-) lead to terminal 6 (ILL-), then check that the light comes on.
  OK:
  
  LED comes on.
  
  If the result is not as specified, replace the rheostat.
  
  Fig 1: Inspecting Light Control Rheostat Connector Terminals (w/o Headlight Cleaner System)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT LIGHT CONTROL RHEOSTAT (w/ Headlight Cleaner System)

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

Standard resistance

STANDARD RESISTANCE REFERENCE CHART

Tester Connection	Switch Condition	Specified Condition
3 (UP) - 5 (E)	UP ON (Pushed)	Below 200 Ω
3 (UP) - 5 (E)	UP OFF (Not pushed)	1MΩ or higher
7 (DOWN) - 5 (E)	DOWN ON (Pushed)	Below 200 Ω
7 (DOWN) - 5 (E)	DOWN OFF (Not pushed)	1MΩ or higher
2 (B) - 5 (E)	CLEANER ON (Pushed)	Below 200 Ω
2 (B) - 5 (E)	CLEANER OFF (Not pushed)	1 MΩ or higher

If the result is not as specified, replace the rheostat.

Inspect the switch illumination.
1. Connect the battery positive (+) lead to terminal 8 (ILL+) and the negative (-) lead to terminal 6 (ILL-), then check that the light comes on.
  OK:
  
  LED comes on.
  
  If the result is not as specified, replace the rheostat.
  
  Fig 2: Inspecting Light Control Rheostat (w/ Headlight Cleaner System)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002