LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2003 >> LS 430 >> Repair and Diagnosis >> External Pages >> Different car >> Section 371 (Body Control Systems - Diagnostics) >> Circuit Inspection >> Light Control Switch Circuit >> Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Inspection Procedure

WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check light control switch  . See LIGHT CONTROL SWITCH CIRCUIT .
    1. NG: Replace the headlight control switch. 
    2. OK: Go to next step. 
  2. Check wire harness and connector between headlight control switch and body ECU  . See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE .
    1. NG: Repair or replace wire harness or connector. 
    2. OK: Go to next step. 

    Proceed to next circuit inspection shown on problem symptoms table  . See PROBLEM SYMPTOMS TABLE .