2003 Lexus GS 430FACTORY OEM SERVICE PROCEDURE

Stop Light Switch

Inspect the stop light switch continuity. See Fig 1. See INSPECTING STOP LIGHT SWITCH CONTINUITYΒ  table. If the continuity is not as specified, replace the switch. See STOP LIGHT SWITCHΒ  under REMOVAL & INSTALLATION.

INSPECTING STOP LIGHT SWITCH CONTINUITY

Switch Position Tester Connection Specified Condition
Switch Pin Free (Pedal Depressed) ..... No Continuity
Switch Pin Pushed In (Pedal Released) 1 & 2 Continuity
Switch Pin Free (Pedal Depressed) ..... No Continuity
Switch Pin Pushed In (Pedal Released) 3 & 4 Continuity
Fig 1: Inspecting Stop Light Switch Continuity
G00184978Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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