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Light Control

WARNING: This page is about a different car, the 2004 Lexus GS 430 and 2004 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
PROBLEM SYMPTOMS TABLE - LIGHT CONTROL

Symptom Suspect Area
Automatic light control does not operate
  1. Light sensor circuit
  2. Headlight control switch circuit
  3. Body ECU No. 2
Auto turn-off does not operate
  1. Door courtesy switch circuit (Driver side)
  2. Ignition switch circuit
  3. Driver door ECU
  4. Body ECU No. 2