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Home >> Lexus >> 2004 >> LX 470 >> Repair and Diagnosis >> Body & Frame >> Windows >> Body Electrical (Troubleshooting) >> Problem Symptoms Table >> Interior Light System:
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Interior Light System:

This system uses the body control system, so check the body control system before you proceed with troubleshooting (See HOW TO PROCEED WITH TROUBLESHOOTING ).

INTERIOR LIGHT SYSTEM SPECIFICATION

Symptom Suspect Area Action
All the lights do not come ON.
  1. DOME Fuse
  2. DOME Relay (Cowl Side J/B LH)
  3. Body ECU (Main)
  1. -
  2. INSPECTION
  3. HOW TO PROCEED WITH TROUBLESHOOTING
The light does not come ON when the driver's door is opened.
  1. Driver's Door Courtesy Switch
  2. Wire Harness
  1. INSPECTION
  2. -
The light does not come ON when the passenger's door is opened.
  1. Passenger's Door Courtesy Switch
  2. Wire Harness
  1. INSPECTION
  2. -
The light does not come on when the rear-right door is opened.
  1. Rear-Right Door Courtesy Switch
  2. Wire Harness
  1. INSPECTION
  2. -
The light does not come on when the rear-left door is opened.
  1. Rear-Left Door Courtesy Switch
  2. Wire Harness
  1. INSPECTION
  2. -
Only one of the bulbs comes ON.
  1. Bulb
  1. -
The illumination does not fade out when all the doors are closed.
  1. Courtesy Switch
  2. Wire Harness
  3. Body ECU (Main)
  1. INSPECTION
  2. -
  3. HOW TO PROCEED WITH TROUBLESHOOTING
The illumination does not fade out immediately when the ignition switch is turned to ACC or ON within 15 seconds after all the doors are closed.
  1. ACC Fuse
  2. ECU-IG1 Fuse
  3. Ignition Switch
  4. Wire Harness
  5. Body ECU (Main)
  1. -
  2. -
  3. INSPECTION
  4. -
  5. HOW TO PROCEED WITH TROUBLESHOOTING
The illumination does not fade out immediately when all the doors are locked within 15 seconds after they are closed.
  1. Door Unlock Detection Switch
  2. Wire Harness
  1. INSPECTION
  2. -
Room light does not come on.
  1. Bulb
  2. Room Light
  3. Rear Personal Light
  4. Wire Harness
  1. -
  2. INSPECTION
  3. INSPECTION
  4. -
Front personal light does not come on.
  1. Bulb
  2. Front Personal Light
  3. Room Light
  4. Wire Harness
  1. -
  2. INSPECTION
  3. INSPECTION
  4. -
Rear Room light does not come on.
  1. Bulb
  2. Rear Room Light
  3. Wire Harness
  1. -
  2. INSPECTION
  3. -
Vanity light does not come on.
  1. Bulb
  2. Vanity Light
  3. Wire Harness
  1. -
  2. INSPECTION
  3. -
Glove compartment light does not come on.
  1. Bulb
  2. Glove Compartment Courtesy Switch
  3. Wire Harness
  1. -
  2. INSPECTION
  3. -
Courtesy light does not come on.
  1. Bulb
  2. Door Courtesy Switch
  3. Wire Harness
  1. -
  2. INSPECTION
  3. -
Foot light does not come on.
  1. Wire Harness
  2. Bulb (LED)
  3. Body ECU (Sub)
  4. Body ECU (Main)
  1. -
  2. -
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
  4. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Center Console Spot light does not come on.
  1. Wire Harness
  2. Bulb (LED)
  3. Body Control ECU (Sub)
  1. -
  2. -
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Side Step and Outer Foot light does not come on.
  1. Wire Harness
  2. Bulb (LED)
  3. Body ECU (Sub)
  4. Body ECU (Main)
  1. -
  2. -
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
  4. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Inside Door Handle Illumination does not come on.
  1. Wire Harness
  2. Bulb (LED)
  3. Body ECU (Sub)
  4. Body ECU (Main)
  1. -
  2. -
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
  4. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
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