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Illumination Light System

WARNING: This page is about a different car, the 2003 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.

This system uses the multiplex communication system, so check diagnosis system of the multiplex communication system before you proceed with troubleshooting.

ILLUMINATION LIGHT SYSTEM TROUBLE SYMPTOMS REFERENCE

Symptom Suspect Area See Section
Illumination light do not light.
(Taillight is normal)
  1. PANEL Fuse (Instrument Panel J/B)
  2. Rheostat Light Control
  3. Wire Harness
  1. -
  2. COMBINATION METER ECU POWER SOURCE CIRCUIT
  3. -
Illumination light do not light.
(Taillight does not light)
  1. Taillight Control Relay (Instrument Panel J/B)
  2. Taillight System
  3. Rheostat Light Control
  4. Wire Harness
  5. WPANEL Fuse (Instrument Panel J/B)
  1. INSPECTION
  2. INSPECTION
  3. COMBINATION METER ECU POWER SOURCE CIRCUIT
  4. -
  5. -
Only one light does not light.
  1. Bulb
  2. Wire Harness
  1. -
  2. -
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